diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 4050 |
1 files changed, 4050 insertions, 0 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h new file mode 100644 index 0000000..9dca3b6 --- /dev/null +++ b/src/include/nodes/parsenodes.h @@ -0,0 +1,4050 @@ +/*------------------------------------------------------------------------- + * + * parsenodes.h + * definitions for parse tree nodes + * + * Many of the node types used in parsetrees include a "location" field. + * This is a byte (not character) offset in the original source text, to be + * used for positioning an error cursor when there is an error related to + * the node. Access to the original source text is needed to make use of + * the location. At the topmost (statement) level, we also provide a + * statement length, likewise measured in bytes, for convenience in + * identifying statement boundaries in multi-statement source strings. + * + * + * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/nodes/parsenodes.h + * + *------------------------------------------------------------------------- + */ +#ifndef PARSENODES_H +#define PARSENODES_H + +#include "common/relpath.h" +#include "nodes/bitmapset.h" +#include "nodes/lockoptions.h" +#include "nodes/primnodes.h" +#include "nodes/value.h" +#include "partitioning/partdefs.h" + + +typedef enum OverridingKind +{ + OVERRIDING_NOT_SET = 0, + OVERRIDING_USER_VALUE, + OVERRIDING_SYSTEM_VALUE +} OverridingKind; + +/* Possible sources of a Query */ +typedef enum QuerySource +{ + QSRC_ORIGINAL, /* original parsetree (explicit query) */ + QSRC_PARSER, /* added by parse analysis (now unused) */ + QSRC_INSTEAD_RULE, /* added by unconditional INSTEAD rule */ + QSRC_QUAL_INSTEAD_RULE, /* added by conditional INSTEAD rule */ + QSRC_NON_INSTEAD_RULE /* added by non-INSTEAD rule */ +} QuerySource; + +/* Sort ordering options for ORDER BY and CREATE INDEX */ +typedef enum SortByDir +{ + SORTBY_DEFAULT, + SORTBY_ASC, + SORTBY_DESC, + SORTBY_USING /* not allowed in CREATE INDEX ... */ +} SortByDir; + +typedef enum SortByNulls +{ + SORTBY_NULLS_DEFAULT, + SORTBY_NULLS_FIRST, + SORTBY_NULLS_LAST +} SortByNulls; + +/* Options for [ ALL | DISTINCT ] */ +typedef enum SetQuantifier +{ + SET_QUANTIFIER_DEFAULT, + SET_QUANTIFIER_ALL, + SET_QUANTIFIER_DISTINCT +} SetQuantifier; + +/* + * Grantable rights are encoded so that we can OR them together in a bitmask. + * The present representation of AclItem limits us to 32 distinct rights, + * even though AclMode is defined as uint64. See utils/acl.h. + * + * Caution: changing these codes breaks stored ACLs, hence forces initdb. + */ +typedef uint64 AclMode; /* a bitmask of privilege bits */ + +#define ACL_INSERT (1<<0) /* for relations */ +#define ACL_SELECT (1<<1) +#define ACL_UPDATE (1<<2) +#define ACL_DELETE (1<<3) +#define ACL_TRUNCATE (1<<4) +#define ACL_REFERENCES (1<<5) +#define ACL_TRIGGER (1<<6) +#define ACL_EXECUTE (1<<7) /* for functions */ +#define ACL_USAGE (1<<8) /* for various object types */ +#define ACL_CREATE (1<<9) /* for namespaces and databases */ +#define ACL_CREATE_TEMP (1<<10) /* for databases */ +#define ACL_CONNECT (1<<11) /* for databases */ +#define ACL_SET (1<<12) /* for configuration parameters */ +#define ACL_ALTER_SYSTEM (1<<13) /* for configuration parameters */ +#define N_ACL_RIGHTS 14 /* 1 plus the last 1<<x */ +#define ACL_NO_RIGHTS 0 +/* Currently, SELECT ... FOR [KEY] UPDATE/SHARE requires UPDATE privileges */ +#define ACL_SELECT_FOR_UPDATE ACL_UPDATE + + +/***************************************************************************** + * Query Tree + *****************************************************************************/ + +/* + * Query - + * Parse analysis turns all statements into a Query tree + * for further processing by the rewriter and planner. + * + * Utility statements (i.e. non-optimizable statements) have the + * utilityStmt field set, and the rest of the Query is mostly dummy. + * + * Planning converts a Query tree into a Plan tree headed by a PlannedStmt + * node --- the Query structure is not used by the executor. + * + * All the fields ignored for the query jumbling are not semantically + * significant (such as alias names), as is ignored anything that can + * be deduced from child nodes (else we'd just be double-hashing that + * piece of information). + */ +typedef struct Query +{ + NodeTag type; + + CmdType commandType; /* select|insert|update|delete|merge|utility */ + + /* where did I come from? */ + QuerySource querySource pg_node_attr(query_jumble_ignore); + + /* + * query identifier (can be set by plugins); ignored for equal, as it + * might not be set; also not stored. This is the result of the query + * jumble, hence ignored. + */ + uint64 queryId pg_node_attr(equal_ignore, query_jumble_ignore, read_write_ignore, read_as(0)); + + /* do I set the command result tag? */ + bool canSetTag pg_node_attr(query_jumble_ignore); + + Node *utilityStmt; /* non-null if commandType == CMD_UTILITY */ + + /* + * rtable index of target relation for INSERT/UPDATE/DELETE/MERGE; 0 for + * SELECT. This is ignored in the query jumble as unrelated to the + * compilation of the query ID. + */ + int resultRelation pg_node_attr(query_jumble_ignore); + + /* has aggregates in tlist or havingQual */ + bool hasAggs pg_node_attr(query_jumble_ignore); + /* has window functions in tlist */ + bool hasWindowFuncs pg_node_attr(query_jumble_ignore); + /* has set-returning functions in tlist */ + bool hasTargetSRFs pg_node_attr(query_jumble_ignore); + /* has subquery SubLink */ + bool hasSubLinks pg_node_attr(query_jumble_ignore); + /* distinctClause is from DISTINCT ON */ + bool hasDistinctOn pg_node_attr(query_jumble_ignore); + /* WITH RECURSIVE was specified */ + bool hasRecursive pg_node_attr(query_jumble_ignore); + /* has INSERT/UPDATE/DELETE in WITH */ + bool hasModifyingCTE pg_node_attr(query_jumble_ignore); + /* FOR [KEY] UPDATE/SHARE was specified */ + bool hasForUpdate pg_node_attr(query_jumble_ignore); + /* rewriter has applied some RLS policy */ + bool hasRowSecurity pg_node_attr(query_jumble_ignore); + /* is a RETURN statement */ + bool isReturn pg_node_attr(query_jumble_ignore); + + List *cteList; /* WITH list (of CommonTableExpr's) */ + + List *rtable; /* list of range table entries */ + + /* + * list of RTEPermissionInfo nodes for the rtable entries having + * perminfoindex > 0 + */ + List *rteperminfos pg_node_attr(query_jumble_ignore); + FromExpr *jointree; /* table join tree (FROM and WHERE clauses); + * also USING clause for MERGE */ + + List *mergeActionList; /* list of actions for MERGE (only) */ + /* whether to use outer join */ + bool mergeUseOuterJoin pg_node_attr(query_jumble_ignore); + + List *targetList; /* target list (of TargetEntry) */ + + /* OVERRIDING clause */ + OverridingKind override pg_node_attr(query_jumble_ignore); + + OnConflictExpr *onConflict; /* ON CONFLICT DO [NOTHING | UPDATE] */ + + List *returningList; /* return-values list (of TargetEntry) */ + + List *groupClause; /* a list of SortGroupClause's */ + bool groupDistinct; /* is the group by clause distinct? */ + + List *groupingSets; /* a list of GroupingSet's if present */ + + Node *havingQual; /* qualifications applied to groups */ + + List *windowClause; /* a list of WindowClause's */ + + List *distinctClause; /* a list of SortGroupClause's */ + + List *sortClause; /* a list of SortGroupClause's */ + + Node *limitOffset; /* # of result tuples to skip (int8 expr) */ + Node *limitCount; /* # of result tuples to return (int8 expr) */ + LimitOption limitOption; /* limit type */ + + List *rowMarks; /* a list of RowMarkClause's */ + + Node *setOperations; /* set-operation tree if this is top level of + * a UNION/INTERSECT/EXCEPT query */ + + /* + * A list of pg_constraint OIDs that the query depends on to be + * semantically valid + */ + List *constraintDeps pg_node_attr(query_jumble_ignore); + + /* a list of WithCheckOption's (added during rewrite) */ + List *withCheckOptions pg_node_attr(query_jumble_ignore); + + /* + * The following two fields identify the portion of the source text string + * containing this query. They are typically only populated in top-level + * Queries, not in sub-queries. When not set, they might both be zero, or + * both be -1 meaning "unknown". + */ + /* start location, or -1 if unknown */ + int stmt_location; + /* length in bytes; 0 means "rest of string" */ + int stmt_len pg_node_attr(query_jumble_ignore); +} Query; + + +/**************************************************************************** + * Supporting data structures for Parse Trees + * + * Most of these node types appear in raw parsetrees output by the grammar, + * and get transformed to something else by the analyzer. A few of them + * are used as-is in transformed querytrees. + ****************************************************************************/ + +/* + * TypeName - specifies a type in definitions + * + * For TypeName structures generated internally, it is often easier to + * specify the type by OID than by name. If "names" is NIL then the + * actual type OID is given by typeOid, otherwise typeOid is unused. + * Similarly, if "typmods" is NIL then the actual typmod is expected to + * be prespecified in typemod, otherwise typemod is unused. + * + * If pct_type is true, then names is actually a field name and we look up + * the type of that field. Otherwise (the normal case), names is a type + * name possibly qualified with schema and database name. + */ +typedef struct TypeName +{ + NodeTag type; + List *names; /* qualified name (list of String nodes) */ + Oid typeOid; /* type identified by OID */ + bool setof; /* is a set? */ + bool pct_type; /* %TYPE specified? */ + List *typmods; /* type modifier expression(s) */ + int32 typemod; /* prespecified type modifier */ + List *arrayBounds; /* array bounds */ + int location; /* token location, or -1 if unknown */ +} TypeName; + +/* + * ColumnRef - specifies a reference to a column, or possibly a whole tuple + * + * The "fields" list must be nonempty. It can contain String nodes + * (representing names) and A_Star nodes (representing occurrence of a '*'). + * Currently, A_Star must appear only as the last list element --- the grammar + * is responsible for enforcing this! + * + * Note: any container subscripting or selection of fields from composite columns + * is represented by an A_Indirection node above the ColumnRef. However, + * for simplicity in the normal case, initial field selection from a table + * name is represented within ColumnRef and not by adding A_Indirection. + */ +typedef struct ColumnRef +{ + NodeTag type; + List *fields; /* field names (String nodes) or A_Star */ + int location; /* token location, or -1 if unknown */ +} ColumnRef; + +/* + * ParamRef - specifies a $n parameter reference + */ +typedef struct ParamRef +{ + NodeTag type; + int number; /* the number of the parameter */ + int location; /* token location, or -1 if unknown */ +} ParamRef; + +/* + * A_Expr - infix, prefix, and postfix expressions + */ +typedef enum A_Expr_Kind +{ + AEXPR_OP, /* normal operator */ + AEXPR_OP_ANY, /* scalar op ANY (array) */ + AEXPR_OP_ALL, /* scalar op ALL (array) */ + AEXPR_DISTINCT, /* IS DISTINCT FROM - name must be "=" */ + AEXPR_NOT_DISTINCT, /* IS NOT DISTINCT FROM - name must be "=" */ + AEXPR_NULLIF, /* NULLIF - name must be "=" */ + AEXPR_IN, /* [NOT] IN - name must be "=" or "<>" */ + AEXPR_LIKE, /* [NOT] LIKE - name must be "~~" or "!~~" */ + AEXPR_ILIKE, /* [NOT] ILIKE - name must be "~~*" or "!~~*" */ + AEXPR_SIMILAR, /* [NOT] SIMILAR - name must be "~" or "!~" */ + AEXPR_BETWEEN, /* name must be "BETWEEN" */ + AEXPR_NOT_BETWEEN, /* name must be "NOT BETWEEN" */ + AEXPR_BETWEEN_SYM, /* name must be "BETWEEN SYMMETRIC" */ + AEXPR_NOT_BETWEEN_SYM /* name must be "NOT BETWEEN SYMMETRIC" */ +} A_Expr_Kind; + +typedef struct A_Expr +{ + pg_node_attr(custom_read_write) + + NodeTag type; + A_Expr_Kind kind; /* see above */ + List *name; /* possibly-qualified name of operator */ + Node *lexpr; /* left argument, or NULL if none */ + Node *rexpr; /* right argument, or NULL if none */ + int location; /* token location, or -1 if unknown */ +} A_Expr; + +/* + * A_Const - a literal constant + * + * Value nodes are inline for performance. You can treat 'val' as a node, + * as in IsA(&val, Integer). 'val' is not valid if isnull is true. + */ +union ValUnion +{ + Node node; + Integer ival; + Float fval; + Boolean boolval; + String sval; + BitString bsval; +}; + +typedef struct A_Const +{ + pg_node_attr(custom_copy_equal, custom_read_write, custom_query_jumble) + + NodeTag type; + union ValUnion val; + bool isnull; /* SQL NULL constant */ + int location; /* token location, or -1 if unknown */ +} A_Const; + +/* + * TypeCast - a CAST expression + */ +typedef struct TypeCast +{ + NodeTag type; + Node *arg; /* the expression being casted */ + TypeName *typeName; /* the target type */ + int location; /* token location, or -1 if unknown */ +} TypeCast; + +/* + * CollateClause - a COLLATE expression + */ +typedef struct CollateClause +{ + NodeTag type; + Node *arg; /* input expression */ + List *collname; /* possibly-qualified collation name */ + int location; /* token location, or -1 if unknown */ +} CollateClause; + +/* + * RoleSpec - a role name or one of a few special values. + */ +typedef enum RoleSpecType +{ + ROLESPEC_CSTRING, /* role name is stored as a C string */ + ROLESPEC_CURRENT_ROLE, /* role spec is CURRENT_ROLE */ + ROLESPEC_CURRENT_USER, /* role spec is CURRENT_USER */ + ROLESPEC_SESSION_USER, /* role spec is SESSION_USER */ + ROLESPEC_PUBLIC /* role name is "public" */ +} RoleSpecType; + +typedef struct RoleSpec +{ + NodeTag type; + RoleSpecType roletype; /* Type of this rolespec */ + char *rolename; /* filled only for ROLESPEC_CSTRING */ + int location; /* token location, or -1 if unknown */ +} RoleSpec; + +/* + * FuncCall - a function or aggregate invocation + * + * agg_order (if not NIL) indicates we saw 'foo(... ORDER BY ...)', or if + * agg_within_group is true, it was 'foo(...) WITHIN GROUP (ORDER BY ...)'. + * agg_star indicates we saw a 'foo(*)' construct, while agg_distinct + * indicates we saw 'foo(DISTINCT ...)'. In any of these cases, the + * construct *must* be an aggregate call. Otherwise, it might be either an + * aggregate or some other kind of function. However, if FILTER or OVER is + * present it had better be an aggregate or window function. + * + * Normally, you'd initialize this via makeFuncCall() and then only change the + * parts of the struct its defaults don't match afterwards, as needed. + */ +typedef struct FuncCall +{ + NodeTag type; + List *funcname; /* qualified name of function */ + List *args; /* the arguments (list of exprs) */ + List *agg_order; /* ORDER BY (list of SortBy) */ + Node *agg_filter; /* FILTER clause, if any */ + struct WindowDef *over; /* OVER clause, if any */ + bool agg_within_group; /* ORDER BY appeared in WITHIN GROUP */ + bool agg_star; /* argument was really '*' */ + bool agg_distinct; /* arguments were labeled DISTINCT */ + bool func_variadic; /* last argument was labeled VARIADIC */ + CoercionForm funcformat; /* how to display this node */ + int location; /* token location, or -1 if unknown */ +} FuncCall; + +/* + * A_Star - '*' representing all columns of a table or compound field + * + * This can appear within ColumnRef.fields, A_Indirection.indirection, and + * ResTarget.indirection lists. + */ +typedef struct A_Star +{ + NodeTag type; +} A_Star; + +/* + * A_Indices - array subscript or slice bounds ([idx] or [lidx:uidx]) + * + * In slice case, either or both of lidx and uidx can be NULL (omitted). + * In non-slice case, uidx holds the single subscript and lidx is always NULL. + */ +typedef struct A_Indices +{ + NodeTag type; + bool is_slice; /* true if slice (i.e., colon present) */ + Node *lidx; /* slice lower bound, if any */ + Node *uidx; /* subscript, or slice upper bound if any */ +} A_Indices; + +/* + * A_Indirection - select a field and/or array element from an expression + * + * The indirection list can contain A_Indices nodes (representing + * subscripting), String nodes (representing field selection --- the + * string value is the name of the field to select), and A_Star nodes + * (representing selection of all fields of a composite type). + * For example, a complex selection operation like + * (foo).field1[42][7].field2 + * would be represented with a single A_Indirection node having a 4-element + * indirection list. + * + * Currently, A_Star must appear only as the last list element --- the grammar + * is responsible for enforcing this! + */ +typedef struct A_Indirection +{ + NodeTag type; + Node *arg; /* the thing being selected from */ + List *indirection; /* subscripts and/or field names and/or * */ +} A_Indirection; + +/* + * A_ArrayExpr - an ARRAY[] construct + */ +typedef struct A_ArrayExpr +{ + NodeTag type; + List *elements; /* array element expressions */ + int location; /* token location, or -1 if unknown */ +} A_ArrayExpr; + +/* + * ResTarget - + * result target (used in target list of pre-transformed parse trees) + * + * In a SELECT target list, 'name' is the column label from an + * 'AS ColumnLabel' clause, or NULL if there was none, and 'val' is the + * value expression itself. The 'indirection' field is not used. + * + * INSERT uses ResTarget in its target-column-names list. Here, 'name' is + * the name of the destination column, 'indirection' stores any subscripts + * attached to the destination, and 'val' is not used. + * + * In an UPDATE target list, 'name' is the name of the destination column, + * 'indirection' stores any subscripts attached to the destination, and + * 'val' is the expression to assign. + * + * See A_Indirection for more info about what can appear in 'indirection'. + */ +typedef struct ResTarget +{ + NodeTag type; + char *name; /* column name or NULL */ + List *indirection; /* subscripts, field names, and '*', or NIL */ + Node *val; /* the value expression to compute or assign */ + int location; /* token location, or -1 if unknown */ +} ResTarget; + +/* + * MultiAssignRef - element of a row source expression for UPDATE + * + * In an UPDATE target list, when we have SET (a,b,c) = row-valued-expression, + * we generate separate ResTarget items for each of a,b,c. Their "val" trees + * are MultiAssignRef nodes numbered 1..n, linking to a common copy of the + * row-valued-expression (which parse analysis will process only once, when + * handling the MultiAssignRef with colno=1). + */ +typedef struct MultiAssignRef +{ + NodeTag type; + Node *source; /* the row-valued expression */ + int colno; /* column number for this target (1..n) */ + int ncolumns; /* number of targets in the construct */ +} MultiAssignRef; + +/* + * SortBy - for ORDER BY clause + */ +typedef struct SortBy +{ + NodeTag type; + Node *node; /* expression to sort on */ + SortByDir sortby_dir; /* ASC/DESC/USING/default */ + SortByNulls sortby_nulls; /* NULLS FIRST/LAST */ + List *useOp; /* name of op to use, if SORTBY_USING */ + int location; /* operator location, or -1 if none/unknown */ +} SortBy; + +/* + * WindowDef - raw representation of WINDOW and OVER clauses + * + * For entries in a WINDOW list, "name" is the window name being defined. + * For OVER clauses, we use "name" for the "OVER window" syntax, or "refname" + * for the "OVER (window)" syntax, which is subtly different --- the latter + * implies overriding the window frame clause. + */ +typedef struct WindowDef +{ + NodeTag type; + char *name; /* window's own name */ + char *refname; /* referenced window name, if any */ + List *partitionClause; /* PARTITION BY expression list */ + List *orderClause; /* ORDER BY (list of SortBy) */ + int frameOptions; /* frame_clause options, see below */ + Node *startOffset; /* expression for starting bound, if any */ + Node *endOffset; /* expression for ending bound, if any */ + int location; /* parse location, or -1 if none/unknown */ +} WindowDef; + +/* + * frameOptions is an OR of these bits. The NONDEFAULT and BETWEEN bits are + * used so that ruleutils.c can tell which properties were specified and + * which were defaulted; the correct behavioral bits must be set either way. + * The START_foo and END_foo options must come in pairs of adjacent bits for + * the convenience of gram.y, even though some of them are useless/invalid. + */ +#define FRAMEOPTION_NONDEFAULT 0x00001 /* any specified? */ +#define FRAMEOPTION_RANGE 0x00002 /* RANGE behavior */ +#define FRAMEOPTION_ROWS 0x00004 /* ROWS behavior */ +#define FRAMEOPTION_GROUPS 0x00008 /* GROUPS behavior */ +#define FRAMEOPTION_BETWEEN 0x00010 /* BETWEEN given? */ +#define FRAMEOPTION_START_UNBOUNDED_PRECEDING 0x00020 /* start is U. P. */ +#define FRAMEOPTION_END_UNBOUNDED_PRECEDING 0x00040 /* (disallowed) */ +#define FRAMEOPTION_START_UNBOUNDED_FOLLOWING 0x00080 /* (disallowed) */ +#define FRAMEOPTION_END_UNBOUNDED_FOLLOWING 0x00100 /* end is U. F. */ +#define FRAMEOPTION_START_CURRENT_ROW 0x00200 /* start is C. R. */ +#define FRAMEOPTION_END_CURRENT_ROW 0x00400 /* end is C. R. */ +#define FRAMEOPTION_START_OFFSET_PRECEDING 0x00800 /* start is O. P. */ +#define FRAMEOPTION_END_OFFSET_PRECEDING 0x01000 /* end is O. P. */ +#define FRAMEOPTION_START_OFFSET_FOLLOWING 0x02000 /* start is O. F. */ +#define FRAMEOPTION_END_OFFSET_FOLLOWING 0x04000 /* end is O. F. */ +#define FRAMEOPTION_EXCLUDE_CURRENT_ROW 0x08000 /* omit C.R. */ +#define FRAMEOPTION_EXCLUDE_GROUP 0x10000 /* omit C.R. & peers */ +#define FRAMEOPTION_EXCLUDE_TIES 0x20000 /* omit C.R.'s peers */ + +#define FRAMEOPTION_START_OFFSET \ + (FRAMEOPTION_START_OFFSET_PRECEDING | FRAMEOPTION_START_OFFSET_FOLLOWING) +#define FRAMEOPTION_END_OFFSET \ + (FRAMEOPTION_END_OFFSET_PRECEDING | FRAMEOPTION_END_OFFSET_FOLLOWING) +#define FRAMEOPTION_EXCLUSION \ + (FRAMEOPTION_EXCLUDE_CURRENT_ROW | FRAMEOPTION_EXCLUDE_GROUP | \ + FRAMEOPTION_EXCLUDE_TIES) + +#define FRAMEOPTION_DEFAULTS \ + (FRAMEOPTION_RANGE | FRAMEOPTION_START_UNBOUNDED_PRECEDING | \ + FRAMEOPTION_END_CURRENT_ROW) + +/* + * RangeSubselect - subquery appearing in a FROM clause + */ +typedef struct RangeSubselect +{ + NodeTag type; + bool lateral; /* does it have LATERAL prefix? */ + Node *subquery; /* the untransformed sub-select clause */ + Alias *alias; /* table alias & optional column aliases */ +} RangeSubselect; + +/* + * RangeFunction - function call appearing in a FROM clause + * + * functions is a List because we use this to represent the construct + * ROWS FROM(func1(...), func2(...), ...). Each element of this list is a + * two-element sublist, the first element being the untransformed function + * call tree, and the second element being a possibly-empty list of ColumnDef + * nodes representing any columndef list attached to that function within the + * ROWS FROM() syntax. + * + * alias and coldeflist represent any alias and/or columndef list attached + * at the top level. (We disallow coldeflist appearing both here and + * per-function, but that's checked in parse analysis, not by the grammar.) + */ +typedef struct RangeFunction +{ + NodeTag type; + bool lateral; /* does it have LATERAL prefix? */ + bool ordinality; /* does it have WITH ORDINALITY suffix? */ + bool is_rowsfrom; /* is result of ROWS FROM() syntax? */ + List *functions; /* per-function information, see above */ + Alias *alias; /* table alias & optional column aliases */ + List *coldeflist; /* list of ColumnDef nodes to describe result + * of function returning RECORD */ +} RangeFunction; + +/* + * RangeTableFunc - raw form of "table functions" such as XMLTABLE + */ +typedef struct RangeTableFunc +{ + NodeTag type; + bool lateral; /* does it have LATERAL prefix? */ + Node *docexpr; /* document expression */ + Node *rowexpr; /* row generator expression */ + List *namespaces; /* list of namespaces as ResTarget */ + List *columns; /* list of RangeTableFuncCol */ + Alias *alias; /* table alias & optional column aliases */ + int location; /* token location, or -1 if unknown */ +} RangeTableFunc; + +/* + * RangeTableFuncCol - one column in a RangeTableFunc->columns + * + * If for_ordinality is true (FOR ORDINALITY), then the column is an int4 + * column and the rest of the fields are ignored. + */ +typedef struct RangeTableFuncCol +{ + NodeTag type; + char *colname; /* name of generated column */ + TypeName *typeName; /* type of generated column */ + bool for_ordinality; /* does it have FOR ORDINALITY? */ + bool is_not_null; /* does it have NOT NULL? */ + Node *colexpr; /* column filter expression */ + Node *coldefexpr; /* column default value expression */ + int location; /* token location, or -1 if unknown */ +} RangeTableFuncCol; + +/* + * RangeTableSample - TABLESAMPLE appearing in a raw FROM clause + * + * This node, appearing only in raw parse trees, represents + * <relation> TABLESAMPLE <method> (<params>) REPEATABLE (<num>) + * Currently, the <relation> can only be a RangeVar, but we might in future + * allow RangeSubselect and other options. Note that the RangeTableSample + * is wrapped around the node representing the <relation>, rather than being + * a subfield of it. + */ +typedef struct RangeTableSample +{ + NodeTag type; + Node *relation; /* relation to be sampled */ + List *method; /* sampling method name (possibly qualified) */ + List *args; /* argument(s) for sampling method */ + Node *repeatable; /* REPEATABLE expression, or NULL if none */ + int location; /* method name location, or -1 if unknown */ +} RangeTableSample; + +/* + * ColumnDef - column definition (used in various creates) + * + * If the column has a default value, we may have the value expression + * in either "raw" form (an untransformed parse tree) or "cooked" form + * (a post-parse-analysis, executable expression tree), depending on + * how this ColumnDef node was created (by parsing, or by inheritance + * from an existing relation). We should never have both in the same node! + * + * Similarly, we may have a COLLATE specification in either raw form + * (represented as a CollateClause with arg==NULL) or cooked form + * (the collation's OID). + * + * The constraints list may contain a CONSTR_DEFAULT item in a raw + * parsetree produced by gram.y, but transformCreateStmt will remove + * the item and set raw_default instead. CONSTR_DEFAULT items + * should not appear in any subsequent processing. + */ +typedef struct ColumnDef +{ + NodeTag type; + char *colname; /* name of column */ + TypeName *typeName; /* type of column */ + char *compression; /* compression method for column */ + int inhcount; /* number of times column is inherited */ + bool is_local; /* column has local (non-inherited) def'n */ + bool is_not_null; /* NOT NULL constraint specified? */ + bool is_from_type; /* column definition came from table type */ + char storage; /* attstorage setting, or 0 for default */ + char *storage_name; /* attstorage setting name or NULL for default */ + Node *raw_default; /* default value (untransformed parse tree) */ + Node *cooked_default; /* default value (transformed expr tree) */ + char identity; /* attidentity setting */ + RangeVar *identitySequence; /* to store identity sequence name for + * ALTER TABLE ... ADD COLUMN */ + char generated; /* attgenerated setting */ + CollateClause *collClause; /* untransformed COLLATE spec, if any */ + Oid collOid; /* collation OID (InvalidOid if not set) */ + List *constraints; /* other constraints on column */ + List *fdwoptions; /* per-column FDW options */ + int location; /* parse location, or -1 if none/unknown */ +} ColumnDef; + +/* + * TableLikeClause - CREATE TABLE ( ... LIKE ... ) clause + */ +typedef struct TableLikeClause +{ + NodeTag type; + RangeVar *relation; + bits32 options; /* OR of TableLikeOption flags */ + Oid relationOid; /* If table has been looked up, its OID */ +} TableLikeClause; + +typedef enum TableLikeOption +{ + CREATE_TABLE_LIKE_COMMENTS = 1 << 0, + CREATE_TABLE_LIKE_COMPRESSION = 1 << 1, + CREATE_TABLE_LIKE_CONSTRAINTS = 1 << 2, + CREATE_TABLE_LIKE_DEFAULTS = 1 << 3, + CREATE_TABLE_LIKE_GENERATED = 1 << 4, + CREATE_TABLE_LIKE_IDENTITY = 1 << 5, + CREATE_TABLE_LIKE_INDEXES = 1 << 6, + CREATE_TABLE_LIKE_STATISTICS = 1 << 7, + CREATE_TABLE_LIKE_STORAGE = 1 << 8, + CREATE_TABLE_LIKE_ALL = PG_INT32_MAX +} TableLikeOption; + +/* + * IndexElem - index parameters (used in CREATE INDEX, and in ON CONFLICT) + * + * For a plain index attribute, 'name' is the name of the table column to + * index, and 'expr' is NULL. For an index expression, 'name' is NULL and + * 'expr' is the expression tree. + */ +typedef struct IndexElem +{ + NodeTag type; + char *name; /* name of attribute to index, or NULL */ + Node *expr; /* expression to index, or NULL */ + char *indexcolname; /* name for index column; NULL = default */ + List *collation; /* name of collation; NIL = default */ + List *opclass; /* name of desired opclass; NIL = default */ + List *opclassopts; /* opclass-specific options, or NIL */ + SortByDir ordering; /* ASC/DESC/default */ + SortByNulls nulls_ordering; /* FIRST/LAST/default */ +} IndexElem; + +/* + * DefElem - a generic "name = value" option definition + * + * In some contexts the name can be qualified. Also, certain SQL commands + * allow a SET/ADD/DROP action to be attached to option settings, so it's + * convenient to carry a field for that too. (Note: currently, it is our + * practice that the grammar allows namespace and action only in statements + * where they are relevant; C code can just ignore those fields in other + * statements.) + */ +typedef enum DefElemAction +{ + DEFELEM_UNSPEC, /* no action given */ + DEFELEM_SET, + DEFELEM_ADD, + DEFELEM_DROP +} DefElemAction; + +typedef struct DefElem +{ + NodeTag type; + char *defnamespace; /* NULL if unqualified name */ + char *defname; + Node *arg; /* typically Integer, Float, String, or + * TypeName */ + DefElemAction defaction; /* unspecified action, or SET/ADD/DROP */ + int location; /* token location, or -1 if unknown */ +} DefElem; + +/* + * LockingClause - raw representation of FOR [NO KEY] UPDATE/[KEY] SHARE + * options + * + * Note: lockedRels == NIL means "all relations in query". Otherwise it + * is a list of RangeVar nodes. (We use RangeVar mainly because it carries + * a location field --- currently, parse analysis insists on unqualified + * names in LockingClause.) + */ +typedef struct LockingClause +{ + NodeTag type; + List *lockedRels; /* FOR [KEY] UPDATE/SHARE relations */ + LockClauseStrength strength; + LockWaitPolicy waitPolicy; /* NOWAIT and SKIP LOCKED */ +} LockingClause; + +/* + * XMLSERIALIZE (in raw parse tree only) + */ +typedef struct XmlSerialize +{ + NodeTag type; + XmlOptionType xmloption; /* DOCUMENT or CONTENT */ + Node *expr; + TypeName *typeName; + bool indent; /* [NO] INDENT */ + int location; /* token location, or -1 if unknown */ +} XmlSerialize; + +/* Partitioning related definitions */ + +/* + * PartitionElem - parse-time representation of a single partition key + * + * expr can be either a raw expression tree or a parse-analyzed expression. + * We don't store these on-disk, though. + */ +typedef struct PartitionElem +{ + NodeTag type; + char *name; /* name of column to partition on, or NULL */ + Node *expr; /* expression to partition on, or NULL */ + List *collation; /* name of collation; NIL = default */ + List *opclass; /* name of desired opclass; NIL = default */ + int location; /* token location, or -1 if unknown */ +} PartitionElem; + +typedef enum PartitionStrategy +{ + PARTITION_STRATEGY_LIST = 'l', + PARTITION_STRATEGY_RANGE = 'r', + PARTITION_STRATEGY_HASH = 'h' +} PartitionStrategy; + +/* + * PartitionSpec - parse-time representation of a partition key specification + * + * This represents the key space we will be partitioning on. + */ +typedef struct PartitionSpec +{ + NodeTag type; + PartitionStrategy strategy; + List *partParams; /* List of PartitionElems */ + int location; /* token location, or -1 if unknown */ +} PartitionSpec; + +/* + * PartitionBoundSpec - a partition bound specification + * + * This represents the portion of the partition key space assigned to a + * particular partition. These are stored on disk in pg_class.relpartbound. + */ +struct PartitionBoundSpec +{ + NodeTag type; + + char strategy; /* see PARTITION_STRATEGY codes above */ + bool is_default; /* is it a default partition bound? */ + + /* Partitioning info for HASH strategy: */ + int modulus; + int remainder; + + /* Partitioning info for LIST strategy: */ + List *listdatums; /* List of Consts (or A_Consts in raw tree) */ + + /* Partitioning info for RANGE strategy: */ + List *lowerdatums; /* List of PartitionRangeDatums */ + List *upperdatums; /* List of PartitionRangeDatums */ + + int location; /* token location, or -1 if unknown */ +}; + +/* + * PartitionRangeDatum - one of the values in a range partition bound + * + * This can be MINVALUE, MAXVALUE or a specific bounded value. + */ +typedef enum PartitionRangeDatumKind +{ + PARTITION_RANGE_DATUM_MINVALUE = -1, /* less than any other value */ + PARTITION_RANGE_DATUM_VALUE = 0, /* a specific (bounded) value */ + PARTITION_RANGE_DATUM_MAXVALUE = 1 /* greater than any other value */ +} PartitionRangeDatumKind; + +typedef struct PartitionRangeDatum +{ + NodeTag type; + + PartitionRangeDatumKind kind; + Node *value; /* Const (or A_Const in raw tree), if kind is + * PARTITION_RANGE_DATUM_VALUE, else NULL */ + + int location; /* token location, or -1 if unknown */ +} PartitionRangeDatum; + +/* + * PartitionCmd - info for ALTER TABLE/INDEX ATTACH/DETACH PARTITION commands + */ +typedef struct PartitionCmd +{ + NodeTag type; + RangeVar *name; /* name of partition to attach/detach */ + PartitionBoundSpec *bound; /* FOR VALUES, if attaching */ + bool concurrent; +} PartitionCmd; + +/**************************************************************************** + * Nodes for a Query tree + ****************************************************************************/ + +/*-------------------- + * RangeTblEntry - + * A range table is a List of RangeTblEntry nodes. + * + * A range table entry may represent a plain relation, a sub-select in + * FROM, or the result of a JOIN clause. (Only explicit JOIN syntax + * produces an RTE, not the implicit join resulting from multiple FROM + * items. This is because we only need the RTE to deal with SQL features + * like outer joins and join-output-column aliasing.) Other special + * RTE types also exist, as indicated by RTEKind. + * + * Note that we consider RTE_RELATION to cover anything that has a pg_class + * entry. relkind distinguishes the sub-cases. + * + * alias is an Alias node representing the AS alias-clause attached to the + * FROM expression, or NULL if no clause. + * + * eref is the table reference name and column reference names (either + * real or aliases). Note that system columns (OID etc) are not included + * in the column list. + * eref->aliasname is required to be present, and should generally be used + * to identify the RTE for error messages etc. + * + * In RELATION RTEs, the colnames in both alias and eref are indexed by + * physical attribute number; this means there must be colname entries for + * dropped columns. When building an RTE we insert empty strings ("") for + * dropped columns. Note however that a stored rule may have nonempty + * colnames for columns dropped since the rule was created (and for that + * matter the colnames might be out of date due to column renamings). + * The same comments apply to FUNCTION RTEs when a function's return type + * is a named composite type. + * + * In JOIN RTEs, the colnames in both alias and eref are one-to-one with + * joinaliasvars entries. A JOIN RTE will omit columns of its inputs when + * those columns are known to be dropped at parse time. Again, however, + * a stored rule might contain entries for columns dropped since the rule + * was created. (This is only possible for columns not actually referenced + * in the rule.) When loading a stored rule, we replace the joinaliasvars + * items for any such columns with null pointers. (We can't simply delete + * them from the joinaliasvars list, because that would affect the attnums + * of Vars referencing the rest of the list.) + * + * inh is true for relation references that should be expanded to include + * inheritance children, if the rel has any. This *must* be false for + * RTEs other than RTE_RELATION entries. + * + * inFromCl marks those range variables that are listed in the FROM clause. + * It's false for RTEs that are added to a query behind the scenes, such + * as the NEW and OLD variables for a rule, or the subqueries of a UNION. + * This flag is not used during parsing (except in transformLockingClause, + * q.v.); the parser now uses a separate "namespace" data structure to + * control visibility. But it is needed by ruleutils.c to determine + * whether RTEs should be shown in decompiled queries. + * + * securityQuals is a list of security barrier quals (boolean expressions), + * to be tested in the listed order before returning a row from the + * relation. It is always NIL in parser output. Entries are added by the + * rewriter to implement security-barrier views and/or row-level security. + * Note that the planner turns each boolean expression into an implicitly + * AND'ed sublist, as is its usual habit with qualification expressions. + *-------------------- + */ +typedef enum RTEKind +{ + RTE_RELATION, /* ordinary relation reference */ + RTE_SUBQUERY, /* subquery in FROM */ + RTE_JOIN, /* join */ + RTE_FUNCTION, /* function in FROM */ + RTE_TABLEFUNC, /* TableFunc(.., column list) */ + RTE_VALUES, /* VALUES (<exprlist>), (<exprlist>), ... */ + RTE_CTE, /* common table expr (WITH list element) */ + RTE_NAMEDTUPLESTORE, /* tuplestore, e.g. for AFTER triggers */ + RTE_RESULT /* RTE represents an empty FROM clause; such + * RTEs are added by the planner, they're not + * present during parsing or rewriting */ +} RTEKind; + +typedef struct RangeTblEntry +{ + pg_node_attr(custom_read_write, custom_query_jumble) + + NodeTag type; + + RTEKind rtekind; /* see above */ + + /* + * XXX the fields applicable to only some rte kinds should be merged into + * a union. I didn't do this yet because the diffs would impact a lot of + * code that is being actively worked on. FIXME someday. + */ + + /* + * Fields valid for a plain relation RTE (else zero): + * + * rellockmode is really LOCKMODE, but it's declared int to avoid having + * to include lock-related headers here. It must be RowExclusiveLock if + * the RTE is an INSERT/UPDATE/DELETE/MERGE target, else RowShareLock if + * the RTE is a SELECT FOR UPDATE/FOR SHARE target, else AccessShareLock. + * + * Note: in some cases, rule expansion may result in RTEs that are marked + * with RowExclusiveLock even though they are not the target of the + * current query; this happens if a DO ALSO rule simply scans the original + * target table. We leave such RTEs with their original lockmode so as to + * avoid getting an additional, lesser lock. + * + * perminfoindex is 1-based index of the RTEPermissionInfo belonging to + * this RTE in the containing struct's list of same; 0 if permissions need + * not be checked for this RTE. + * + * As a special case, relid, relkind, rellockmode, and perminfoindex can + * also be set (nonzero) in an RTE_SUBQUERY RTE. This occurs when we + * convert an RTE_RELATION RTE naming a view into an RTE_SUBQUERY + * containing the view's query. We still need to perform run-time locking + * and permission checks on the view, even though it's not directly used + * in the query anymore, and the most expedient way to do that is to + * retain these fields from the old state of the RTE. + * + * As a special case, RTE_NAMEDTUPLESTORE can also set relid to indicate + * that the tuple format of the tuplestore is the same as the referenced + * relation. This allows plans referencing AFTER trigger transition + * tables to be invalidated if the underlying table is altered. + */ + Oid relid; /* OID of the relation */ + char relkind; /* relation kind (see pg_class.relkind) */ + int rellockmode; /* lock level that query requires on the rel */ + struct TableSampleClause *tablesample; /* sampling info, or NULL */ + Index perminfoindex; + + /* + * Fields valid for a subquery RTE (else NULL): + */ + Query *subquery; /* the sub-query */ + bool security_barrier; /* is from security_barrier view? */ + + /* + * Fields valid for a join RTE (else NULL/zero): + * + * joinaliasvars is a list of (usually) Vars corresponding to the columns + * of the join result. An alias Var referencing column K of the join + * result can be replaced by the K'th element of joinaliasvars --- but to + * simplify the task of reverse-listing aliases correctly, we do not do + * that until planning time. In detail: an element of joinaliasvars can + * be a Var of one of the join's input relations, or such a Var with an + * implicit coercion to the join's output column type, or a COALESCE + * expression containing the two input column Vars (possibly coerced). + * Elements beyond the first joinmergedcols entries are always just Vars, + * and are never referenced from elsewhere in the query (that is, join + * alias Vars are generated only for merged columns). We keep these + * entries only because they're needed in expandRTE() and similar code. + * + * Vars appearing within joinaliasvars are marked with varnullingrels sets + * that describe the nulling effects of this join and lower ones. This is + * essential for FULL JOIN cases, because the COALESCE expression only + * describes the semantics correctly if its inputs have been nulled by the + * join. For other cases, it allows expandRTE() to generate a valid + * representation of the join's output without consulting additional + * parser state. + * + * Within a Query loaded from a stored rule, it is possible for non-merged + * joinaliasvars items to be null pointers, which are placeholders for + * (necessarily unreferenced) columns dropped since the rule was made. + * Also, once planning begins, joinaliasvars items can be almost anything, + * as a result of subquery-flattening substitutions. + * + * joinleftcols is an integer list of physical column numbers of the left + * join input rel that are included in the join; likewise joinrighttcols + * for the right join input rel. (Which rels those are can be determined + * from the associated JoinExpr.) If the join is USING/NATURAL, then the + * first joinmergedcols entries in each list identify the merged columns. + * The merged columns come first in the join output, then remaining + * columns of the left input, then remaining columns of the right. + * + * Note that input columns could have been dropped after creation of a + * stored rule, if they are not referenced in the query (in particular, + * merged columns could not be dropped); this is not accounted for in + * joinleftcols/joinrighttcols. + */ + JoinType jointype; /* type of join */ + int joinmergedcols; /* number of merged (JOIN USING) columns */ + List *joinaliasvars; /* list of alias-var expansions */ + List *joinleftcols; /* left-side input column numbers */ + List *joinrightcols; /* right-side input column numbers */ + + /* + * join_using_alias is an alias clause attached directly to JOIN/USING. It + * is different from the alias field (below) in that it does not hide the + * range variables of the tables being joined. + */ + Alias *join_using_alias; + + /* + * Fields valid for a function RTE (else NIL/zero): + * + * When funcordinality is true, the eref->colnames list includes an alias + * for the ordinality column. The ordinality column is otherwise + * implicit, and must be accounted for "by hand" in places such as + * expandRTE(). + */ + List *functions; /* list of RangeTblFunction nodes */ + bool funcordinality; /* is this called WITH ORDINALITY? */ + + /* + * Fields valid for a TableFunc RTE (else NULL): + */ + TableFunc *tablefunc; + + /* + * Fields valid for a values RTE (else NIL): + */ + List *values_lists; /* list of expression lists */ + + /* + * Fields valid for a CTE RTE (else NULL/zero): + */ + char *ctename; /* name of the WITH list item */ + Index ctelevelsup; /* number of query levels up */ + bool self_reference; /* is this a recursive self-reference? */ + + /* + * Fields valid for CTE, VALUES, ENR, and TableFunc RTEs (else NIL): + * + * We need these for CTE RTEs so that the types of self-referential + * columns are well-defined. For VALUES RTEs, storing these explicitly + * saves having to re-determine the info by scanning the values_lists. For + * ENRs, we store the types explicitly here (we could get the information + * from the catalogs if 'relid' was supplied, but we'd still need these + * for TupleDesc-based ENRs, so we might as well always store the type + * info here). For TableFuncs, these fields are redundant with data in + * the TableFunc node, but keeping them here allows some code sharing with + * the other cases. + * + * For ENRs only, we have to consider the possibility of dropped columns. + * A dropped column is included in these lists, but it will have zeroes in + * all three lists (as well as an empty-string entry in eref). Testing + * for zero coltype is the standard way to detect a dropped column. + */ + List *coltypes; /* OID list of column type OIDs */ + List *coltypmods; /* integer list of column typmods */ + List *colcollations; /* OID list of column collation OIDs */ + + /* + * Fields valid for ENR RTEs (else NULL/zero): + */ + char *enrname; /* name of ephemeral named relation */ + Cardinality enrtuples; /* estimated or actual from caller */ + + /* + * Fields valid in all RTEs: + */ + Alias *alias; /* user-written alias clause, if any */ + Alias *eref; /* expanded reference names */ + bool lateral; /* subquery, function, or values is LATERAL? */ + bool inh; /* inheritance requested? */ + bool inFromCl; /* present in FROM clause? */ + List *securityQuals; /* security barrier quals to apply, if any */ +} RangeTblEntry; + +/* + * RTEPermissionInfo + * Per-relation information for permission checking. Added to the Query + * node by the parser when adding the corresponding RTE to the query + * range table and subsequently editorialized on by the rewriter if + * needed after rule expansion. + * + * Only the relations directly mentioned in the query are checked for + * access permissions by the core executor, so only their RTEPermissionInfos + * are present in the Query. However, extensions may want to check inheritance + * children too, depending on the value of rte->inh, so it's copied in 'inh' + * for their perusal. + * + * requiredPerms and checkAsUser specify run-time access permissions checks + * to be performed at query startup. The user must have *all* of the + * permissions that are OR'd together in requiredPerms (never 0!). If + * checkAsUser is not zero, then do the permissions checks using the access + * rights of that user, not the current effective user ID. (This allows rules + * to act as setuid gateways.) + * + * For SELECT/INSERT/UPDATE permissions, if the user doesn't have table-wide + * permissions then it is sufficient to have the permissions on all columns + * identified in selectedCols (for SELECT) and/or insertedCols and/or + * updatedCols (INSERT with ON CONFLICT DO UPDATE may have all 3). + * selectedCols, insertedCols and updatedCols are bitmapsets, which cannot have + * negative integer members, so we subtract FirstLowInvalidHeapAttributeNumber + * from column numbers before storing them in these fields. A whole-row Var + * reference is represented by setting the bit for InvalidAttrNumber. + * + * updatedCols is also used in some other places, for example, to determine + * which triggers to fire and in FDWs to know which changed columns they need + * to ship off. + */ +typedef struct RTEPermissionInfo +{ + NodeTag type; + + Oid relid; /* relation OID */ + bool inh; /* separately check inheritance children? */ + AclMode requiredPerms; /* bitmask of required access permissions */ + Oid checkAsUser; /* if valid, check access as this role */ + Bitmapset *selectedCols; /* columns needing SELECT permission */ + Bitmapset *insertedCols; /* columns needing INSERT permission */ + Bitmapset *updatedCols; /* columns needing UPDATE permission */ +} RTEPermissionInfo; + +/* + * RangeTblFunction - + * RangeTblEntry subsidiary data for one function in a FUNCTION RTE. + * + * If the function had a column definition list (required for an + * otherwise-unspecified RECORD result), funccolnames lists the names given + * in the definition list, funccoltypes lists their declared column types, + * funccoltypmods lists their typmods, funccolcollations their collations. + * Otherwise, those fields are NIL. + * + * Notice we don't attempt to store info about the results of functions + * returning named composite types, because those can change from time to + * time. We do however remember how many columns we thought the type had + * (including dropped columns!), so that we can successfully ignore any + * columns added after the query was parsed. + * + * The query jumbling only needs to track the function expression. + */ +typedef struct RangeTblFunction +{ + NodeTag type; + + Node *funcexpr; /* expression tree for func call */ + /* number of columns it contributes to RTE */ + int funccolcount pg_node_attr(query_jumble_ignore); + /* These fields record the contents of a column definition list, if any: */ + /* column names (list of String) */ + List *funccolnames pg_node_attr(query_jumble_ignore); + /* OID list of column type OIDs */ + List *funccoltypes pg_node_attr(query_jumble_ignore); + /* integer list of column typmods */ + List *funccoltypmods pg_node_attr(query_jumble_ignore); + /* OID list of column collation OIDs */ + List *funccolcollations pg_node_attr(query_jumble_ignore); + + /* This is set during planning for use by the executor: */ + /* PARAM_EXEC Param IDs affecting this func */ + Bitmapset *funcparams pg_node_attr(query_jumble_ignore); +} RangeTblFunction; + +/* + * TableSampleClause - TABLESAMPLE appearing in a transformed FROM clause + * + * Unlike RangeTableSample, this is a subnode of the relevant RangeTblEntry. + */ +typedef struct TableSampleClause +{ + NodeTag type; + Oid tsmhandler; /* OID of the tablesample handler function */ + List *args; /* tablesample argument expression(s) */ + Expr *repeatable; /* REPEATABLE expression, or NULL if none */ +} TableSampleClause; + +/* + * WithCheckOption - + * representation of WITH CHECK OPTION checks to be applied to new tuples + * when inserting/updating an auto-updatable view, or RLS WITH CHECK + * policies to be applied when inserting/updating a relation with RLS. + */ +typedef enum WCOKind +{ + WCO_VIEW_CHECK, /* WCO on an auto-updatable view */ + WCO_RLS_INSERT_CHECK, /* RLS INSERT WITH CHECK policy */ + WCO_RLS_UPDATE_CHECK, /* RLS UPDATE WITH CHECK policy */ + WCO_RLS_CONFLICT_CHECK, /* RLS ON CONFLICT DO UPDATE USING policy */ + WCO_RLS_MERGE_UPDATE_CHECK, /* RLS MERGE UPDATE USING policy */ + WCO_RLS_MERGE_DELETE_CHECK /* RLS MERGE DELETE USING policy */ +} WCOKind; + +typedef struct WithCheckOption +{ + NodeTag type; + WCOKind kind; /* kind of WCO */ + char *relname; /* name of relation that specified the WCO */ + char *polname; /* name of RLS policy being checked */ + Node *qual; /* constraint qual to check */ + bool cascaded; /* true for a cascaded WCO on a view */ +} WithCheckOption; + +/* + * SortGroupClause - + * representation of ORDER BY, GROUP BY, PARTITION BY, + * DISTINCT, DISTINCT ON items + * + * You might think that ORDER BY is only interested in defining ordering, + * and GROUP/DISTINCT are only interested in defining equality. However, + * one way to implement grouping is to sort and then apply a "uniq"-like + * filter. So it's also interesting to keep track of possible sort operators + * for GROUP/DISTINCT, and in particular to try to sort for the grouping + * in a way that will also yield a requested ORDER BY ordering. So we need + * to be able to compare ORDER BY and GROUP/DISTINCT lists, which motivates + * the decision to give them the same representation. + * + * tleSortGroupRef must match ressortgroupref of exactly one entry of the + * query's targetlist; that is the expression to be sorted or grouped by. + * eqop is the OID of the equality operator. + * sortop is the OID of the ordering operator (a "<" or ">" operator), + * or InvalidOid if not available. + * nulls_first means about what you'd expect. If sortop is InvalidOid + * then nulls_first is meaningless and should be set to false. + * hashable is true if eqop is hashable (note this condition also depends + * on the datatype of the input expression). + * + * In an ORDER BY item, all fields must be valid. (The eqop isn't essential + * here, but it's cheap to get it along with the sortop, and requiring it + * to be valid eases comparisons to grouping items.) Note that this isn't + * actually enough information to determine an ordering: if the sortop is + * collation-sensitive, a collation OID is needed too. We don't store the + * collation in SortGroupClause because it's not available at the time the + * parser builds the SortGroupClause; instead, consult the exposed collation + * of the referenced targetlist expression to find out what it is. + * + * In a grouping item, eqop must be valid. If the eqop is a btree equality + * operator, then sortop should be set to a compatible ordering operator. + * We prefer to set eqop/sortop/nulls_first to match any ORDER BY item that + * the query presents for the same tlist item. If there is none, we just + * use the default ordering op for the datatype. + * + * If the tlist item's type has a hash opclass but no btree opclass, then + * we will set eqop to the hash equality operator, sortop to InvalidOid, + * and nulls_first to false. A grouping item of this kind can only be + * implemented by hashing, and of course it'll never match an ORDER BY item. + * + * The hashable flag is provided since we generally have the requisite + * information readily available when the SortGroupClause is constructed, + * and it's relatively expensive to get it again later. Note there is no + * need for a "sortable" flag since OidIsValid(sortop) serves the purpose. + * + * A query might have both ORDER BY and DISTINCT (or DISTINCT ON) clauses. + * In SELECT DISTINCT, the distinctClause list is as long or longer than the + * sortClause list, while in SELECT DISTINCT ON it's typically shorter. + * The two lists must match up to the end of the shorter one --- the parser + * rearranges the distinctClause if necessary to make this true. (This + * restriction ensures that only one sort step is needed to both satisfy the + * ORDER BY and set up for the Unique step. This is semantically necessary + * for DISTINCT ON, and presents no real drawback for DISTINCT.) + */ +typedef struct SortGroupClause +{ + NodeTag type; + Index tleSortGroupRef; /* reference into targetlist */ + Oid eqop; /* the equality operator ('=' op) */ + Oid sortop; /* the ordering operator ('<' op), or 0 */ + bool nulls_first; /* do NULLs come before normal values? */ + /* can eqop be implemented by hashing? */ + bool hashable pg_node_attr(query_jumble_ignore); +} SortGroupClause; + +/* + * GroupingSet - + * representation of CUBE, ROLLUP and GROUPING SETS clauses + * + * In a Query with grouping sets, the groupClause contains a flat list of + * SortGroupClause nodes for each distinct expression used. The actual + * structure of the GROUP BY clause is given by the groupingSets tree. + * + * In the raw parser output, GroupingSet nodes (of all types except SIMPLE + * which is not used) are potentially mixed in with the expressions in the + * groupClause of the SelectStmt. (An expression can't contain a GroupingSet, + * but a list may mix GroupingSet and expression nodes.) At this stage, the + * content of each node is a list of expressions, some of which may be RowExprs + * which represent sublists rather than actual row constructors, and nested + * GroupingSet nodes where legal in the grammar. The structure directly + * reflects the query syntax. + * + * In parse analysis, the transformed expressions are used to build the tlist + * and groupClause list (of SortGroupClause nodes), and the groupingSets tree + * is eventually reduced to a fixed format: + * + * EMPTY nodes represent (), and obviously have no content + * + * SIMPLE nodes represent a list of one or more expressions to be treated as an + * atom by the enclosing structure; the content is an integer list of + * ressortgroupref values (see SortGroupClause) + * + * CUBE and ROLLUP nodes contain a list of one or more SIMPLE nodes. + * + * SETS nodes contain a list of EMPTY, SIMPLE, CUBE or ROLLUP nodes, but after + * parse analysis they cannot contain more SETS nodes; enough of the syntactic + * transforms of the spec have been applied that we no longer have arbitrarily + * deep nesting (though we still preserve the use of cube/rollup). + * + * Note that if the groupingSets tree contains no SIMPLE nodes (only EMPTY + * nodes at the leaves), then the groupClause will be empty, but this is still + * an aggregation query (similar to using aggs or HAVING without GROUP BY). + * + * As an example, the following clause: + * + * GROUP BY GROUPING SETS ((a,b), CUBE(c,(d,e))) + * + * looks like this after raw parsing: + * + * SETS( RowExpr(a,b) , CUBE( c, RowExpr(d,e) ) ) + * + * and parse analysis converts it to: + * + * SETS( SIMPLE(1,2), CUBE( SIMPLE(3), SIMPLE(4,5) ) ) + */ +typedef enum GroupingSetKind +{ + GROUPING_SET_EMPTY, + GROUPING_SET_SIMPLE, + GROUPING_SET_ROLLUP, + GROUPING_SET_CUBE, + GROUPING_SET_SETS +} GroupingSetKind; + +typedef struct GroupingSet +{ + NodeTag type; + GroupingSetKind kind pg_node_attr(query_jumble_ignore); + List *content; + int location; +} GroupingSet; + +/* + * WindowClause - + * transformed representation of WINDOW and OVER clauses + * + * A parsed Query's windowClause list contains these structs. "name" is set + * if the clause originally came from WINDOW, and is NULL if it originally + * was an OVER clause (but note that we collapse out duplicate OVERs). + * partitionClause and orderClause are lists of SortGroupClause structs. + * If we have RANGE with offset PRECEDING/FOLLOWING, the semantics of that are + * specified by startInRangeFunc/inRangeColl/inRangeAsc/inRangeNullsFirst + * for the start offset, or endInRangeFunc/inRange* for the end offset. + * winref is an ID number referenced by WindowFunc nodes; it must be unique + * among the members of a Query's windowClause list. + * When refname isn't null, the partitionClause is always copied from there; + * the orderClause might or might not be copied (see copiedOrder); the framing + * options are never copied, per spec. + * + * The information relevant for the query jumbling is the partition clause + * type and its bounds. + */ +typedef struct WindowClause +{ + NodeTag type; + /* window name (NULL in an OVER clause) */ + char *name pg_node_attr(query_jumble_ignore); + /* referenced window name, if any */ + char *refname pg_node_attr(query_jumble_ignore); + List *partitionClause; /* PARTITION BY list */ + /* ORDER BY list */ + List *orderClause; + int frameOptions; /* frame_clause options, see WindowDef */ + Node *startOffset; /* expression for starting bound, if any */ + Node *endOffset; /* expression for ending bound, if any */ + /* qual to help short-circuit execution */ + List *runCondition pg_node_attr(query_jumble_ignore); + /* in_range function for startOffset */ + Oid startInRangeFunc pg_node_attr(query_jumble_ignore); + /* in_range function for endOffset */ + Oid endInRangeFunc pg_node_attr(query_jumble_ignore); + /* collation for in_range tests */ + Oid inRangeColl pg_node_attr(query_jumble_ignore); + /* use ASC sort order for in_range tests? */ + bool inRangeAsc pg_node_attr(query_jumble_ignore); + /* nulls sort first for in_range tests? */ + bool inRangeNullsFirst pg_node_attr(query_jumble_ignore); + Index winref; /* ID referenced by window functions */ + /* did we copy orderClause from refname? */ + bool copiedOrder pg_node_attr(query_jumble_ignore); +} WindowClause; + +/* + * RowMarkClause - + * parser output representation of FOR [KEY] UPDATE/SHARE clauses + * + * Query.rowMarks contains a separate RowMarkClause node for each relation + * identified as a FOR [KEY] UPDATE/SHARE target. If one of these clauses + * is applied to a subquery, we generate RowMarkClauses for all normal and + * subquery rels in the subquery, but they are marked pushedDown = true to + * distinguish them from clauses that were explicitly written at this query + * level. Also, Query.hasForUpdate tells whether there were explicit FOR + * UPDATE/SHARE/KEY SHARE clauses in the current query level. + */ +typedef struct RowMarkClause +{ + NodeTag type; + Index rti; /* range table index of target relation */ + LockClauseStrength strength; + LockWaitPolicy waitPolicy; /* NOWAIT and SKIP LOCKED */ + bool pushedDown; /* pushed down from higher query level? */ +} RowMarkClause; + +/* + * WithClause - + * representation of WITH clause + * + * Note: WithClause does not propagate into the Query representation; + * but CommonTableExpr does. + */ +typedef struct WithClause +{ + NodeTag type; + List *ctes; /* list of CommonTableExprs */ + bool recursive; /* true = WITH RECURSIVE */ + int location; /* token location, or -1 if unknown */ +} WithClause; + +/* + * InferClause - + * ON CONFLICT unique index inference clause + * + * Note: InferClause does not propagate into the Query representation. + */ +typedef struct InferClause +{ + NodeTag type; + List *indexElems; /* IndexElems to infer unique index */ + Node *whereClause; /* qualification (partial-index predicate) */ + char *conname; /* Constraint name, or NULL if unnamed */ + int location; /* token location, or -1 if unknown */ +} InferClause; + +/* + * OnConflictClause - + * representation of ON CONFLICT clause + * + * Note: OnConflictClause does not propagate into the Query representation. + */ +typedef struct OnConflictClause +{ + NodeTag type; + OnConflictAction action; /* DO NOTHING or UPDATE? */ + InferClause *infer; /* Optional index inference clause */ + List *targetList; /* the target list (of ResTarget) */ + Node *whereClause; /* qualifications */ + int location; /* token location, or -1 if unknown */ +} OnConflictClause; + +/* + * CommonTableExpr - + * representation of WITH list element + */ + +typedef enum CTEMaterialize +{ + CTEMaterializeDefault, /* no option specified */ + CTEMaterializeAlways, /* MATERIALIZED */ + CTEMaterializeNever /* NOT MATERIALIZED */ +} CTEMaterialize; + +typedef struct CTESearchClause +{ + NodeTag type; + List *search_col_list; + bool search_breadth_first; + char *search_seq_column; + int location; +} CTESearchClause; + +typedef struct CTECycleClause +{ + NodeTag type; + List *cycle_col_list; + char *cycle_mark_column; + Node *cycle_mark_value; + Node *cycle_mark_default; + char *cycle_path_column; + int location; + /* These fields are set during parse analysis: */ + Oid cycle_mark_type; /* common type of _value and _default */ + int cycle_mark_typmod; + Oid cycle_mark_collation; + Oid cycle_mark_neop; /* <> operator for type */ +} CTECycleClause; + +typedef struct CommonTableExpr +{ + NodeTag type; + + /* + * Query name (never qualified). The string name is included in the query + * jumbling because RTE_CTE RTEs need it. + */ + char *ctename; + /* optional list of column names */ + List *aliascolnames pg_node_attr(query_jumble_ignore); + CTEMaterialize ctematerialized; /* is this an optimization fence? */ + /* SelectStmt/InsertStmt/etc before parse analysis, Query afterwards: */ + Node *ctequery; /* the CTE's subquery */ + CTESearchClause *search_clause pg_node_attr(query_jumble_ignore); + CTECycleClause *cycle_clause pg_node_attr(query_jumble_ignore); + int location; /* token location, or -1 if unknown */ + /* These fields are set during parse analysis: */ + /* is this CTE actually recursive? */ + bool cterecursive pg_node_attr(query_jumble_ignore); + + /* + * Number of RTEs referencing this CTE (excluding internal + * self-references), irrelevant for query jumbling. + */ + int cterefcount pg_node_attr(query_jumble_ignore); + /* list of output column names */ + List *ctecolnames pg_node_attr(query_jumble_ignore); + /* OID list of output column type OIDs */ + List *ctecoltypes pg_node_attr(query_jumble_ignore); + /* integer list of output column typmods */ + List *ctecoltypmods pg_node_attr(query_jumble_ignore); + /* OID list of column collation OIDs */ + List *ctecolcollations pg_node_attr(query_jumble_ignore); +} CommonTableExpr; + +/* Convenience macro to get the output tlist of a CTE's query */ +#define GetCTETargetList(cte) \ + (AssertMacro(IsA((cte)->ctequery, Query)), \ + ((Query *) (cte)->ctequery)->commandType == CMD_SELECT ? \ + ((Query *) (cte)->ctequery)->targetList : \ + ((Query *) (cte)->ctequery)->returningList) + +/* + * MergeWhenClause - + * raw parser representation of a WHEN clause in a MERGE statement + * + * This is transformed into MergeAction by parse analysis + */ +typedef struct MergeWhenClause +{ + NodeTag type; + bool matched; /* true=MATCHED, false=NOT MATCHED */ + CmdType commandType; /* INSERT/UPDATE/DELETE/DO NOTHING */ + OverridingKind override; /* OVERRIDING clause */ + Node *condition; /* WHEN conditions (raw parser) */ + List *targetList; /* INSERT/UPDATE targetlist */ + /* the following members are only used in INSERT actions */ + List *values; /* VALUES to INSERT, or NULL */ +} MergeWhenClause; + +/* + * MergeAction - + * Transformed representation of a WHEN clause in a MERGE statement + */ +typedef struct MergeAction +{ + NodeTag type; + bool matched; /* true=MATCHED, false=NOT MATCHED */ + CmdType commandType; /* INSERT/UPDATE/DELETE/DO NOTHING */ + /* OVERRIDING clause */ + OverridingKind override pg_node_attr(query_jumble_ignore); + Node *qual; /* transformed WHEN conditions */ + List *targetList; /* the target list (of TargetEntry) */ + /* target attribute numbers of an UPDATE */ + List *updateColnos pg_node_attr(query_jumble_ignore); +} MergeAction; + +/* + * TriggerTransition - + * representation of transition row or table naming clause + * + * Only transition tables are initially supported in the syntax, and only for + * AFTER triggers, but other permutations are accepted by the parser so we can + * give a meaningful message from C code. + */ +typedef struct TriggerTransition +{ + NodeTag type; + char *name; + bool isNew; + bool isTable; +} TriggerTransition; + +/* Nodes for SQL/JSON support */ + +/* + * JsonOutput - + * representation of JSON output clause (RETURNING type [FORMAT format]) + */ +typedef struct JsonOutput +{ + NodeTag type; + TypeName *typeName; /* RETURNING type name, if specified */ + JsonReturning *returning; /* RETURNING FORMAT clause and type Oids */ +} JsonOutput; + +/* + * JsonKeyValue - + * untransformed representation of JSON object key-value pair for + * JSON_OBJECT() and JSON_OBJECTAGG() + */ +typedef struct JsonKeyValue +{ + NodeTag type; + Expr *key; /* key expression */ + JsonValueExpr *value; /* JSON value expression */ +} JsonKeyValue; + +/* + * JsonObjectConstructor - + * untransformed representation of JSON_OBJECT() constructor + */ +typedef struct JsonObjectConstructor +{ + NodeTag type; + List *exprs; /* list of JsonKeyValue pairs */ + JsonOutput *output; /* RETURNING clause, if specified */ + bool absent_on_null; /* skip NULL values? */ + bool unique; /* check key uniqueness? */ + int location; /* token location, or -1 if unknown */ +} JsonObjectConstructor; + +/* + * JsonArrayConstructor - + * untransformed representation of JSON_ARRAY(element,...) constructor + */ +typedef struct JsonArrayConstructor +{ + NodeTag type; + List *exprs; /* list of JsonValueExpr elements */ + JsonOutput *output; /* RETURNING clause, if specified */ + bool absent_on_null; /* skip NULL elements? */ + int location; /* token location, or -1 if unknown */ +} JsonArrayConstructor; + +/* + * JsonArrayQueryConstructor - + * untransformed representation of JSON_ARRAY(subquery) constructor + */ +typedef struct JsonArrayQueryConstructor +{ + NodeTag type; + Node *query; /* subquery */ + JsonOutput *output; /* RETURNING clause, if specified */ + JsonFormat *format; /* FORMAT clause for subquery, if specified */ + bool absent_on_null; /* skip NULL elements? */ + int location; /* token location, or -1 if unknown */ +} JsonArrayQueryConstructor; + +/* + * JsonAggConstructor - + * common fields of untransformed representation of + * JSON_ARRAYAGG() and JSON_OBJECTAGG() + */ +typedef struct JsonAggConstructor +{ + NodeTag type; + JsonOutput *output; /* RETURNING clause, if any */ + Node *agg_filter; /* FILTER clause, if any */ + List *agg_order; /* ORDER BY clause, if any */ + struct WindowDef *over; /* OVER clause, if any */ + int location; /* token location, or -1 if unknown */ +} JsonAggConstructor; + +/* + * JsonObjectAgg - + * untransformed representation of JSON_OBJECTAGG() + */ +typedef struct JsonObjectAgg +{ + NodeTag type; + JsonAggConstructor *constructor; /* common fields */ + JsonKeyValue *arg; /* object key-value pair */ + bool absent_on_null; /* skip NULL values? */ + bool unique; /* check key uniqueness? */ +} JsonObjectAgg; + +/* + * JsonArrayAgg - + * untransformed representation of JSON_ARRAYAGG() + */ +typedef struct JsonArrayAgg +{ + NodeTag type; + JsonAggConstructor *constructor; /* common fields */ + JsonValueExpr *arg; /* array element expression */ + bool absent_on_null; /* skip NULL elements? */ +} JsonArrayAgg; + + +/***************************************************************************** + * Raw Grammar Output Statements + *****************************************************************************/ + +/* + * RawStmt --- container for any one statement's raw parse tree + * + * Parse analysis converts a raw parse tree headed by a RawStmt node into + * an analyzed statement headed by a Query node. For optimizable statements, + * the conversion is complex. For utility statements, the parser usually just + * transfers the raw parse tree (sans RawStmt) into the utilityStmt field of + * the Query node, and all the useful work happens at execution time. + * + * stmt_location/stmt_len identify the portion of the source text string + * containing this raw statement (useful for multi-statement strings). + * + * This is irrelevant for query jumbling, as this is not used in parsed + * queries. + */ +typedef struct RawStmt +{ + pg_node_attr(no_query_jumble) + + NodeTag type; + Node *stmt; /* raw parse tree */ + int stmt_location; /* start location, or -1 if unknown */ + int stmt_len; /* length in bytes; 0 means "rest of string" */ +} RawStmt; + +/***************************************************************************** + * Optimizable Statements + *****************************************************************************/ + +/* ---------------------- + * Insert Statement + * + * The source expression is represented by SelectStmt for both the + * SELECT and VALUES cases. If selectStmt is NULL, then the query + * is INSERT ... DEFAULT VALUES. + * ---------------------- + */ +typedef struct InsertStmt +{ + NodeTag type; + RangeVar *relation; /* relation to insert into */ + List *cols; /* optional: names of the target columns */ + Node *selectStmt; /* the source SELECT/VALUES, or NULL */ + OnConflictClause *onConflictClause; /* ON CONFLICT clause */ + List *returningList; /* list of expressions to return */ + WithClause *withClause; /* WITH clause */ + OverridingKind override; /* OVERRIDING clause */ +} InsertStmt; + +/* ---------------------- + * Delete Statement + * ---------------------- + */ +typedef struct DeleteStmt +{ + NodeTag type; + RangeVar *relation; /* relation to delete from */ + List *usingClause; /* optional using clause for more tables */ + Node *whereClause; /* qualifications */ + List *returningList; /* list of expressions to return */ + WithClause *withClause; /* WITH clause */ +} DeleteStmt; + +/* ---------------------- + * Update Statement + * ---------------------- + */ +typedef struct UpdateStmt +{ + NodeTag type; + RangeVar *relation; /* relation to update */ + List *targetList; /* the target list (of ResTarget) */ + Node *whereClause; /* qualifications */ + List *fromClause; /* optional from clause for more tables */ + List *returningList; /* list of expressions to return */ + WithClause *withClause; /* WITH clause */ +} UpdateStmt; + +/* ---------------------- + * Merge Statement + * ---------------------- + */ +typedef struct MergeStmt +{ + NodeTag type; + RangeVar *relation; /* target relation to merge into */ + Node *sourceRelation; /* source relation */ + Node *joinCondition; /* join condition between source and target */ + List *mergeWhenClauses; /* list of MergeWhenClause(es) */ + WithClause *withClause; /* WITH clause */ +} MergeStmt; + +/* ---------------------- + * Select Statement + * + * A "simple" SELECT is represented in the output of gram.y by a single + * SelectStmt node; so is a VALUES construct. A query containing set + * operators (UNION, INTERSECT, EXCEPT) is represented by a tree of SelectStmt + * nodes, in which the leaf nodes are component SELECTs and the internal nodes + * represent UNION, INTERSECT, or EXCEPT operators. Using the same node + * type for both leaf and internal nodes allows gram.y to stick ORDER BY, + * LIMIT, etc, clause values into a SELECT statement without worrying + * whether it is a simple or compound SELECT. + * ---------------------- + */ +typedef enum SetOperation +{ + SETOP_NONE = 0, + SETOP_UNION, + SETOP_INTERSECT, + SETOP_EXCEPT +} SetOperation; + +typedef struct SelectStmt +{ + NodeTag type; + + /* + * These fields are used only in "leaf" SelectStmts. + */ + List *distinctClause; /* NULL, list of DISTINCT ON exprs, or + * lcons(NIL,NIL) for all (SELECT DISTINCT) */ + IntoClause *intoClause; /* target for SELECT INTO */ + List *targetList; /* the target list (of ResTarget) */ + List *fromClause; /* the FROM clause */ + Node *whereClause; /* WHERE qualification */ + List *groupClause; /* GROUP BY clauses */ + bool groupDistinct; /* Is this GROUP BY DISTINCT? */ + Node *havingClause; /* HAVING conditional-expression */ + List *windowClause; /* WINDOW window_name AS (...), ... */ + + /* + * In a "leaf" node representing a VALUES list, the above fields are all + * null, and instead this field is set. Note that the elements of the + * sublists are just expressions, without ResTarget decoration. Also note + * that a list element can be DEFAULT (represented as a SetToDefault + * node), regardless of the context of the VALUES list. It's up to parse + * analysis to reject that where not valid. + */ + List *valuesLists; /* untransformed list of expression lists */ + + /* + * These fields are used in both "leaf" SelectStmts and upper-level + * SelectStmts. + */ + List *sortClause; /* sort clause (a list of SortBy's) */ + Node *limitOffset; /* # of result tuples to skip */ + Node *limitCount; /* # of result tuples to return */ + LimitOption limitOption; /* limit type */ + List *lockingClause; /* FOR UPDATE (list of LockingClause's) */ + WithClause *withClause; /* WITH clause */ + + /* + * These fields are used only in upper-level SelectStmts. + */ + SetOperation op; /* type of set op */ + bool all; /* ALL specified? */ + struct SelectStmt *larg; /* left child */ + struct SelectStmt *rarg; /* right child */ + /* Eventually add fields for CORRESPONDING spec here */ +} SelectStmt; + + +/* ---------------------- + * Set Operation node for post-analysis query trees + * + * After parse analysis, a SELECT with set operations is represented by a + * top-level Query node containing the leaf SELECTs as subqueries in its + * range table. Its setOperations field shows the tree of set operations, + * with leaf SelectStmt nodes replaced by RangeTblRef nodes, and internal + * nodes replaced by SetOperationStmt nodes. Information about the output + * column types is added, too. (Note that the child nodes do not necessarily + * produce these types directly, but we've checked that their output types + * can be coerced to the output column type.) Also, if it's not UNION ALL, + * information about the types' sort/group semantics is provided in the form + * of a SortGroupClause list (same representation as, eg, DISTINCT). + * The resolved common column collations are provided too; but note that if + * it's not UNION ALL, it's okay for a column to not have a common collation, + * so a member of the colCollations list could be InvalidOid even though the + * column has a collatable type. + * ---------------------- + */ +typedef struct SetOperationStmt +{ + NodeTag type; + SetOperation op; /* type of set op */ + bool all; /* ALL specified? */ + Node *larg; /* left child */ + Node *rarg; /* right child */ + /* Eventually add fields for CORRESPONDING spec here */ + + /* Fields derived during parse analysis (irrelevant for query jumbling): */ + /* OID list of output column type OIDs */ + List *colTypes pg_node_attr(query_jumble_ignore); + /* integer list of output column typmods */ + List *colTypmods pg_node_attr(query_jumble_ignore); + /* OID list of output column collation OIDs */ + List *colCollations pg_node_attr(query_jumble_ignore); + /* a list of SortGroupClause's */ + List *groupClauses pg_node_attr(query_jumble_ignore); + /* groupClauses is NIL if UNION ALL, but must be set otherwise */ +} SetOperationStmt; + + +/* + * RETURN statement (inside SQL function body) + */ +typedef struct ReturnStmt +{ + NodeTag type; + Node *returnval; +} ReturnStmt; + + +/* ---------------------- + * PL/pgSQL Assignment Statement + * + * Like SelectStmt, this is transformed into a SELECT Query. + * However, the targetlist of the result looks more like an UPDATE. + * ---------------------- + */ +typedef struct PLAssignStmt +{ + NodeTag type; + + char *name; /* initial column name */ + List *indirection; /* subscripts and field names, if any */ + int nnames; /* number of names to use in ColumnRef */ + SelectStmt *val; /* the PL/pgSQL expression to assign */ + int location; /* name's token location, or -1 if unknown */ +} PLAssignStmt; + + +/***************************************************************************** + * Other Statements (no optimizations required) + * + * These are not touched by parser/analyze.c except to put them into + * the utilityStmt field of a Query. This is eventually passed to + * ProcessUtility (by-passing rewriting and planning). Some of the + * statements do need attention from parse analysis, and this is + * done by routines in parser/parse_utilcmd.c after ProcessUtility + * receives the command for execution. + * DECLARE CURSOR, EXPLAIN, and CREATE TABLE AS are special cases: + * they contain optimizable statements, which get processed normally + * by parser/analyze.c. + *****************************************************************************/ + +/* + * When a command can act on several kinds of objects with only one + * parse structure required, use these constants to designate the + * object type. Note that commands typically don't support all the types. + */ + +typedef enum ObjectType +{ + OBJECT_ACCESS_METHOD, + OBJECT_AGGREGATE, + OBJECT_AMOP, + OBJECT_AMPROC, + OBJECT_ATTRIBUTE, /* type's attribute, when distinct from column */ + OBJECT_CAST, + OBJECT_COLUMN, + OBJECT_COLLATION, + OBJECT_CONVERSION, + OBJECT_DATABASE, + OBJECT_DEFAULT, + OBJECT_DEFACL, + OBJECT_DOMAIN, + OBJECT_DOMCONSTRAINT, + OBJECT_EVENT_TRIGGER, + OBJECT_EXTENSION, + OBJECT_FDW, + OBJECT_FOREIGN_SERVER, + OBJECT_FOREIGN_TABLE, + OBJECT_FUNCTION, + OBJECT_INDEX, + OBJECT_LANGUAGE, + OBJECT_LARGEOBJECT, + OBJECT_MATVIEW, + OBJECT_OPCLASS, + OBJECT_OPERATOR, + OBJECT_OPFAMILY, + OBJECT_PARAMETER_ACL, + OBJECT_POLICY, + OBJECT_PROCEDURE, + OBJECT_PUBLICATION, + OBJECT_PUBLICATION_NAMESPACE, + OBJECT_PUBLICATION_REL, + OBJECT_ROLE, + OBJECT_ROUTINE, + OBJECT_RULE, + OBJECT_SCHEMA, + OBJECT_SEQUENCE, + OBJECT_SUBSCRIPTION, + OBJECT_STATISTIC_EXT, + OBJECT_TABCONSTRAINT, + OBJECT_TABLE, + OBJECT_TABLESPACE, + OBJECT_TRANSFORM, + OBJECT_TRIGGER, + OBJECT_TSCONFIGURATION, + OBJECT_TSDICTIONARY, + OBJECT_TSPARSER, + OBJECT_TSTEMPLATE, + OBJECT_TYPE, + OBJECT_USER_MAPPING, + OBJECT_VIEW +} ObjectType; + +/* ---------------------- + * Create Schema Statement + * + * NOTE: the schemaElts list contains raw parsetrees for component statements + * of the schema, such as CREATE TABLE, GRANT, etc. These are analyzed and + * executed after the schema itself is created. + * ---------------------- + */ +typedef struct CreateSchemaStmt +{ + NodeTag type; + char *schemaname; /* the name of the schema to create */ + RoleSpec *authrole; /* the owner of the created schema */ + List *schemaElts; /* schema components (list of parsenodes) */ + bool if_not_exists; /* just do nothing if schema already exists? */ +} CreateSchemaStmt; + +typedef enum DropBehavior +{ + DROP_RESTRICT, /* drop fails if any dependent objects */ + DROP_CASCADE /* remove dependent objects too */ +} DropBehavior; + +/* ---------------------- + * Alter Table + * ---------------------- + */ +typedef struct AlterTableStmt +{ + NodeTag type; + RangeVar *relation; /* table to work on */ + List *cmds; /* list of subcommands */ + ObjectType objtype; /* type of object */ + bool missing_ok; /* skip error if table missing */ +} AlterTableStmt; + +typedef enum AlterTableType +{ + AT_AddColumn, /* add column */ + AT_AddColumnToView, /* implicitly via CREATE OR REPLACE VIEW */ + AT_ColumnDefault, /* alter column default */ + AT_CookedColumnDefault, /* add a pre-cooked column default */ + AT_DropNotNull, /* alter column drop not null */ + AT_SetNotNull, /* alter column set not null */ + AT_DropExpression, /* alter column drop expression */ + AT_CheckNotNull, /* check column is already marked not null */ + AT_SetStatistics, /* alter column set statistics */ + AT_SetOptions, /* alter column set ( options ) */ + AT_ResetOptions, /* alter column reset ( options ) */ + AT_SetStorage, /* alter column set storage */ + AT_SetCompression, /* alter column set compression */ + AT_DropColumn, /* drop column */ + AT_AddIndex, /* add index */ + AT_ReAddIndex, /* internal to commands/tablecmds.c */ + AT_AddConstraint, /* add constraint */ + AT_ReAddConstraint, /* internal to commands/tablecmds.c */ + AT_ReAddDomainConstraint, /* internal to commands/tablecmds.c */ + AT_AlterConstraint, /* alter constraint */ + AT_ValidateConstraint, /* validate constraint */ + AT_AddIndexConstraint, /* add constraint using existing index */ + AT_DropConstraint, /* drop constraint */ + AT_ReAddComment, /* internal to commands/tablecmds.c */ + AT_AlterColumnType, /* alter column type */ + AT_AlterColumnGenericOptions, /* alter column OPTIONS (...) */ + AT_ChangeOwner, /* change owner */ + AT_ClusterOn, /* CLUSTER ON */ + AT_DropCluster, /* SET WITHOUT CLUSTER */ + AT_SetLogged, /* SET LOGGED */ + AT_SetUnLogged, /* SET UNLOGGED */ + AT_DropOids, /* SET WITHOUT OIDS */ + AT_SetAccessMethod, /* SET ACCESS METHOD */ + AT_SetTableSpace, /* SET TABLESPACE */ + AT_SetRelOptions, /* SET (...) -- AM specific parameters */ + AT_ResetRelOptions, /* RESET (...) -- AM specific parameters */ + AT_ReplaceRelOptions, /* replace reloption list in its entirety */ + AT_EnableTrig, /* ENABLE TRIGGER name */ + AT_EnableAlwaysTrig, /* ENABLE ALWAYS TRIGGER name */ + AT_EnableReplicaTrig, /* ENABLE REPLICA TRIGGER name */ + AT_DisableTrig, /* DISABLE TRIGGER name */ + AT_EnableTrigAll, /* ENABLE TRIGGER ALL */ + AT_DisableTrigAll, /* DISABLE TRIGGER ALL */ + AT_EnableTrigUser, /* ENABLE TRIGGER USER */ + AT_DisableTrigUser, /* DISABLE TRIGGER USER */ + AT_EnableRule, /* ENABLE RULE name */ + AT_EnableAlwaysRule, /* ENABLE ALWAYS RULE name */ + AT_EnableReplicaRule, /* ENABLE REPLICA RULE name */ + AT_DisableRule, /* DISABLE RULE name */ + AT_AddInherit, /* INHERIT parent */ + AT_DropInherit, /* NO INHERIT parent */ + AT_AddOf, /* OF <type_name> */ + AT_DropOf, /* NOT OF */ + AT_ReplicaIdentity, /* REPLICA IDENTITY */ + AT_EnableRowSecurity, /* ENABLE ROW SECURITY */ + AT_DisableRowSecurity, /* DISABLE ROW SECURITY */ + AT_ForceRowSecurity, /* FORCE ROW SECURITY */ + AT_NoForceRowSecurity, /* NO FORCE ROW SECURITY */ + AT_GenericOptions, /* OPTIONS (...) */ + AT_AttachPartition, /* ATTACH PARTITION */ + AT_DetachPartition, /* DETACH PARTITION */ + AT_DetachPartitionFinalize, /* DETACH PARTITION FINALIZE */ + AT_AddIdentity, /* ADD IDENTITY */ + AT_SetIdentity, /* SET identity column options */ + AT_DropIdentity, /* DROP IDENTITY */ + AT_ReAddStatistics /* internal to commands/tablecmds.c */ +} AlterTableType; + +typedef struct ReplicaIdentityStmt +{ + NodeTag type; + char identity_type; + char *name; +} ReplicaIdentityStmt; + +typedef struct AlterTableCmd /* one subcommand of an ALTER TABLE */ +{ + NodeTag type; + AlterTableType subtype; /* Type of table alteration to apply */ + char *name; /* column, constraint, or trigger to act on, + * or tablespace */ + int16 num; /* attribute number for columns referenced by + * number */ + RoleSpec *newowner; + Node *def; /* definition of new column, index, + * constraint, or parent table */ + DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */ + bool missing_ok; /* skip error if missing? */ + bool recurse; /* exec-time recursion */ +} AlterTableCmd; + + +/* ---------------------- + * Alter Collation + * ---------------------- + */ +typedef struct AlterCollationStmt +{ + NodeTag type; + List *collname; +} AlterCollationStmt; + + +/* ---------------------- + * Alter Domain + * + * The fields are used in different ways by the different variants of + * this command. + * ---------------------- + */ +typedef struct AlterDomainStmt +{ + NodeTag type; + char subtype; /*------------ + * T = alter column default + * N = alter column drop not null + * O = alter column set not null + * C = add constraint + * X = drop constraint + *------------ + */ + List *typeName; /* domain to work on */ + char *name; /* column or constraint name to act on */ + Node *def; /* definition of default or constraint */ + DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */ + bool missing_ok; /* skip error if missing? */ +} AlterDomainStmt; + + +/* ---------------------- + * Grant|Revoke Statement + * ---------------------- + */ +typedef enum GrantTargetType +{ + ACL_TARGET_OBJECT, /* grant on specific named object(s) */ + ACL_TARGET_ALL_IN_SCHEMA, /* grant on all objects in given schema(s) */ + ACL_TARGET_DEFAULTS /* ALTER DEFAULT PRIVILEGES */ +} GrantTargetType; + +typedef struct GrantStmt +{ + NodeTag type; + bool is_grant; /* true = GRANT, false = REVOKE */ + GrantTargetType targtype; /* type of the grant target */ + ObjectType objtype; /* kind of object being operated on */ + List *objects; /* list of RangeVar nodes, ObjectWithArgs + * nodes, or plain names (as String values) */ + List *privileges; /* list of AccessPriv nodes */ + /* privileges == NIL denotes ALL PRIVILEGES */ + List *grantees; /* list of RoleSpec nodes */ + bool grant_option; /* grant or revoke grant option */ + RoleSpec *grantor; + DropBehavior behavior; /* drop behavior (for REVOKE) */ +} GrantStmt; + +/* + * ObjectWithArgs represents a function/procedure/operator name plus parameter + * identification. + * + * objargs includes only the types of the input parameters of the object. + * In some contexts, that will be all we have, and it's enough to look up + * objects according to the traditional Postgres rules (i.e., when only input + * arguments matter). + * + * objfuncargs, if not NIL, carries the full specification of the parameter + * list, including parameter mode annotations. + * + * Some grammar productions can set args_unspecified = true instead of + * providing parameter info. In this case, lookup will succeed only if + * the object name is unique. Note that otherwise, NIL parameter lists + * mean zero arguments. + */ +typedef struct ObjectWithArgs +{ + NodeTag type; + List *objname; /* qualified name of function/operator */ + List *objargs; /* list of Typename nodes (input args only) */ + List *objfuncargs; /* list of FunctionParameter nodes */ + bool args_unspecified; /* argument list was omitted? */ +} ObjectWithArgs; + +/* + * An access privilege, with optional list of column names + * priv_name == NULL denotes ALL PRIVILEGES (only used with a column list) + * cols == NIL denotes "all columns" + * Note that simple "ALL PRIVILEGES" is represented as a NIL list, not + * an AccessPriv with both fields null. + */ +typedef struct AccessPriv +{ + NodeTag type; + char *priv_name; /* string name of privilege */ + List *cols; /* list of String */ +} AccessPriv; + +/* ---------------------- + * Grant/Revoke Role Statement + * + * Note: because of the parsing ambiguity with the GRANT <privileges> + * statement, granted_roles is a list of AccessPriv; the execution code + * should complain if any column lists appear. grantee_roles is a list + * of role names, as String values. + * ---------------------- + */ +typedef struct GrantRoleStmt +{ + NodeTag type; + List *granted_roles; /* list of roles to be granted/revoked */ + List *grantee_roles; /* list of member roles to add/delete */ + bool is_grant; /* true = GRANT, false = REVOKE */ + List *opt; /* options e.g. WITH GRANT OPTION */ + RoleSpec *grantor; /* set grantor to other than current role */ + DropBehavior behavior; /* drop behavior (for REVOKE) */ +} GrantRoleStmt; + +/* ---------------------- + * Alter Default Privileges Statement + * ---------------------- + */ +typedef struct AlterDefaultPrivilegesStmt +{ + NodeTag type; + List *options; /* list of DefElem */ + GrantStmt *action; /* GRANT/REVOKE action (with objects=NIL) */ +} AlterDefaultPrivilegesStmt; + +/* ---------------------- + * Copy Statement + * + * We support "COPY relation FROM file", "COPY relation TO file", and + * "COPY (query) TO file". In any given CopyStmt, exactly one of "relation" + * and "query" must be non-NULL. + * ---------------------- + */ +typedef struct CopyStmt +{ + NodeTag type; + RangeVar *relation; /* the relation to copy */ + Node *query; /* the query (SELECT or DML statement with + * RETURNING) to copy, as a raw parse tree */ + List *attlist; /* List of column names (as Strings), or NIL + * for all columns */ + bool is_from; /* TO or FROM */ + bool is_program; /* is 'filename' a program to popen? */ + char *filename; /* filename, or NULL for STDIN/STDOUT */ + List *options; /* List of DefElem nodes */ + Node *whereClause; /* WHERE condition (or NULL) */ +} CopyStmt; + +/* ---------------------- + * SET Statement (includes RESET) + * + * "SET var TO DEFAULT" and "RESET var" are semantically equivalent, but we + * preserve the distinction in VariableSetKind for CreateCommandTag(). + * ---------------------- + */ +typedef enum VariableSetKind +{ + VAR_SET_VALUE, /* SET var = value */ + VAR_SET_DEFAULT, /* SET var TO DEFAULT */ + VAR_SET_CURRENT, /* SET var FROM CURRENT */ + VAR_SET_MULTI, /* special case for SET TRANSACTION ... */ + VAR_RESET, /* RESET var */ + VAR_RESET_ALL /* RESET ALL */ +} VariableSetKind; + +typedef struct VariableSetStmt +{ + NodeTag type; + VariableSetKind kind; + char *name; /* variable to be set */ + List *args; /* List of A_Const nodes */ + bool is_local; /* SET LOCAL? */ +} VariableSetStmt; + +/* ---------------------- + * Show Statement + * ---------------------- + */ +typedef struct VariableShowStmt +{ + NodeTag type; + char *name; +} VariableShowStmt; + +/* ---------------------- + * Create Table Statement + * + * NOTE: in the raw gram.y output, ColumnDef and Constraint nodes are + * intermixed in tableElts, and constraints is NIL. After parse analysis, + * tableElts contains just ColumnDefs, and constraints contains just + * Constraint nodes (in fact, only CONSTR_CHECK nodes, in the present + * implementation). + * ---------------------- + */ + +typedef struct CreateStmt +{ + NodeTag type; + RangeVar *relation; /* relation to create */ + List *tableElts; /* column definitions (list of ColumnDef) */ + List *inhRelations; /* relations to inherit from (list of + * RangeVar) */ + PartitionBoundSpec *partbound; /* FOR VALUES clause */ + PartitionSpec *partspec; /* PARTITION BY clause */ + TypeName *ofTypename; /* OF typename */ + List *constraints; /* constraints (list of Constraint nodes) */ + List *options; /* options from WITH clause */ + OnCommitAction oncommit; /* what do we do at COMMIT? */ + char *tablespacename; /* table space to use, or NULL */ + char *accessMethod; /* table access method */ + bool if_not_exists; /* just do nothing if it already exists? */ +} CreateStmt; + +/* ---------- + * Definitions for constraints in CreateStmt + * + * Note that column defaults are treated as a type of constraint, + * even though that's a bit odd semantically. + * + * For constraints that use expressions (CONSTR_CHECK, CONSTR_DEFAULT) + * we may have the expression in either "raw" form (an untransformed + * parse tree) or "cooked" form (the nodeToString representation of + * an executable expression tree), depending on how this Constraint + * node was created (by parsing, or by inheritance from an existing + * relation). We should never have both in the same node! + * + * FKCONSTR_ACTION_xxx values are stored into pg_constraint.confupdtype + * and pg_constraint.confdeltype columns; FKCONSTR_MATCH_xxx values are + * stored into pg_constraint.confmatchtype. Changing the code values may + * require an initdb! + * + * If skip_validation is true then we skip checking that the existing rows + * in the table satisfy the constraint, and just install the catalog entries + * for the constraint. A new FK constraint is marked as valid iff + * initially_valid is true. (Usually skip_validation and initially_valid + * are inverses, but we can set both true if the table is known empty.) + * + * Constraint attributes (DEFERRABLE etc) are initially represented as + * separate Constraint nodes for simplicity of parsing. parse_utilcmd.c makes + * a pass through the constraints list to insert the info into the appropriate + * Constraint node. + * ---------- + */ + +typedef enum ConstrType /* types of constraints */ +{ + CONSTR_NULL, /* not standard SQL, but a lot of people + * expect it */ + CONSTR_NOTNULL, + CONSTR_DEFAULT, + CONSTR_IDENTITY, + CONSTR_GENERATED, + CONSTR_CHECK, + CONSTR_PRIMARY, + CONSTR_UNIQUE, + CONSTR_EXCLUSION, + CONSTR_FOREIGN, + CONSTR_ATTR_DEFERRABLE, /* attributes for previous constraint node */ + CONSTR_ATTR_NOT_DEFERRABLE, + CONSTR_ATTR_DEFERRED, + CONSTR_ATTR_IMMEDIATE +} ConstrType; + +/* Foreign key action codes */ +#define FKCONSTR_ACTION_NOACTION 'a' +#define FKCONSTR_ACTION_RESTRICT 'r' +#define FKCONSTR_ACTION_CASCADE 'c' +#define FKCONSTR_ACTION_SETNULL 'n' +#define FKCONSTR_ACTION_SETDEFAULT 'd' + +/* Foreign key matchtype codes */ +#define FKCONSTR_MATCH_FULL 'f' +#define FKCONSTR_MATCH_PARTIAL 'p' +#define FKCONSTR_MATCH_SIMPLE 's' + +typedef struct Constraint +{ + pg_node_attr(custom_read_write) + + NodeTag type; + ConstrType contype; /* see above */ + + /* Fields used for most/all constraint types: */ + char *conname; /* Constraint name, or NULL if unnamed */ + bool deferrable; /* DEFERRABLE? */ + bool initdeferred; /* INITIALLY DEFERRED? */ + int location; /* token location, or -1 if unknown */ + + /* Fields used for constraints with expressions (CHECK and DEFAULT): */ + bool is_no_inherit; /* is constraint non-inheritable? */ + Node *raw_expr; /* expr, as untransformed parse tree */ + char *cooked_expr; /* expr, as nodeToString representation */ + char generated_when; /* ALWAYS or BY DEFAULT */ + + /* Fields used for unique constraints (UNIQUE and PRIMARY KEY): */ + bool nulls_not_distinct; /* null treatment for UNIQUE constraints */ + List *keys; /* String nodes naming referenced key + * column(s) */ + List *including; /* String nodes naming referenced nonkey + * column(s) */ + + /* Fields used for EXCLUSION constraints: */ + List *exclusions; /* list of (IndexElem, operator name) pairs */ + + /* Fields used for index constraints (UNIQUE, PRIMARY KEY, EXCLUSION): */ + List *options; /* options from WITH clause */ + char *indexname; /* existing index to use; otherwise NULL */ + char *indexspace; /* index tablespace; NULL for default */ + bool reset_default_tblspc; /* reset default_tablespace prior to + * creating the index */ + /* These could be, but currently are not, used for UNIQUE/PKEY: */ + char *access_method; /* index access method; NULL for default */ + Node *where_clause; /* partial index predicate */ + + /* Fields used for FOREIGN KEY constraints: */ + RangeVar *pktable; /* Primary key table */ + List *fk_attrs; /* Attributes of foreign key */ + List *pk_attrs; /* Corresponding attrs in PK table */ + char fk_matchtype; /* FULL, PARTIAL, SIMPLE */ + char fk_upd_action; /* ON UPDATE action */ + char fk_del_action; /* ON DELETE action */ + List *fk_del_set_cols; /* ON DELETE SET NULL/DEFAULT (col1, col2) */ + List *old_conpfeqop; /* pg_constraint.conpfeqop of my former self */ + Oid old_pktable_oid; /* pg_constraint.confrelid of my former + * self */ + + /* Fields used for constraints that allow a NOT VALID specification */ + bool skip_validation; /* skip validation of existing rows? */ + bool initially_valid; /* mark the new constraint as valid? */ +} Constraint; + +/* ---------------------- + * Create/Drop Table Space Statements + * ---------------------- + */ + +typedef struct CreateTableSpaceStmt +{ + NodeTag type; + char *tablespacename; + RoleSpec *owner; + char *location; + List *options; +} CreateTableSpaceStmt; + +typedef struct DropTableSpaceStmt +{ + NodeTag type; + char *tablespacename; + bool missing_ok; /* skip error if missing? */ +} DropTableSpaceStmt; + +typedef struct AlterTableSpaceOptionsStmt +{ + NodeTag type; + char *tablespacename; + List *options; + bool isReset; +} AlterTableSpaceOptionsStmt; + +typedef struct AlterTableMoveAllStmt +{ + NodeTag type; + char *orig_tablespacename; + ObjectType objtype; /* Object type to move */ + List *roles; /* List of roles to move objects of */ + char *new_tablespacename; + bool nowait; +} AlterTableMoveAllStmt; + +/* ---------------------- + * Create/Alter Extension Statements + * ---------------------- + */ + +typedef struct CreateExtensionStmt +{ + NodeTag type; + char *extname; + bool if_not_exists; /* just do nothing if it already exists? */ + List *options; /* List of DefElem nodes */ +} CreateExtensionStmt; + +/* Only used for ALTER EXTENSION UPDATE; later might need an action field */ +typedef struct AlterExtensionStmt +{ + NodeTag type; + char *extname; + List *options; /* List of DefElem nodes */ +} AlterExtensionStmt; + +typedef struct AlterExtensionContentsStmt +{ + NodeTag type; + char *extname; /* Extension's name */ + int action; /* +1 = add object, -1 = drop object */ + ObjectType objtype; /* Object's type */ + Node *object; /* Qualified name of the object */ +} AlterExtensionContentsStmt; + +/* ---------------------- + * Create/Alter FOREIGN DATA WRAPPER Statements + * ---------------------- + */ + +typedef struct CreateFdwStmt +{ + NodeTag type; + char *fdwname; /* foreign-data wrapper name */ + List *func_options; /* HANDLER/VALIDATOR options */ + List *options; /* generic options to FDW */ +} CreateFdwStmt; + +typedef struct AlterFdwStmt +{ + NodeTag type; + char *fdwname; /* foreign-data wrapper name */ + List *func_options; /* HANDLER/VALIDATOR options */ + List *options; /* generic options to FDW */ +} AlterFdwStmt; + +/* ---------------------- + * Create/Alter FOREIGN SERVER Statements + * ---------------------- + */ + +typedef struct CreateForeignServerStmt +{ + NodeTag type; + char *servername; /* server name */ + char *servertype; /* optional server type */ + char *version; /* optional server version */ + char *fdwname; /* FDW name */ + bool if_not_exists; /* just do nothing if it already exists? */ + List *options; /* generic options to server */ +} CreateForeignServerStmt; + +typedef struct AlterForeignServerStmt +{ + NodeTag type; + char *servername; /* server name */ + char *version; /* optional server version */ + List *options; /* generic options to server */ + bool has_version; /* version specified */ +} AlterForeignServerStmt; + +/* ---------------------- + * Create FOREIGN TABLE Statement + * ---------------------- + */ + +typedef struct CreateForeignTableStmt +{ + CreateStmt base; + char *servername; + List *options; +} CreateForeignTableStmt; + +/* ---------------------- + * Create/Drop USER MAPPING Statements + * ---------------------- + */ + +typedef struct CreateUserMappingStmt +{ + NodeTag type; + RoleSpec *user; /* user role */ + char *servername; /* server name */ + bool if_not_exists; /* just do nothing if it already exists? */ + List *options; /* generic options to server */ +} CreateUserMappingStmt; + +typedef struct AlterUserMappingStmt +{ + NodeTag type; + RoleSpec *user; /* user role */ + char *servername; /* server name */ + List *options; /* generic options to server */ +} AlterUserMappingStmt; + +typedef struct DropUserMappingStmt +{ + NodeTag type; + RoleSpec *user; /* user role */ + char *servername; /* server name */ + bool missing_ok; /* ignore missing mappings */ +} DropUserMappingStmt; + +/* ---------------------- + * Import Foreign Schema Statement + * ---------------------- + */ + +typedef enum ImportForeignSchemaType +{ + FDW_IMPORT_SCHEMA_ALL, /* all relations wanted */ + FDW_IMPORT_SCHEMA_LIMIT_TO, /* include only listed tables in import */ + FDW_IMPORT_SCHEMA_EXCEPT /* exclude listed tables from import */ +} ImportForeignSchemaType; + +typedef struct ImportForeignSchemaStmt +{ + NodeTag type; + char *server_name; /* FDW server name */ + char *remote_schema; /* remote schema name to query */ + char *local_schema; /* local schema to create objects in */ + ImportForeignSchemaType list_type; /* type of table list */ + List *table_list; /* List of RangeVar */ + List *options; /* list of options to pass to FDW */ +} ImportForeignSchemaStmt; + +/*---------------------- + * Create POLICY Statement + *---------------------- + */ +typedef struct CreatePolicyStmt +{ + NodeTag type; + char *policy_name; /* Policy's name */ + RangeVar *table; /* the table name the policy applies to */ + char *cmd_name; /* the command name the policy applies to */ + bool permissive; /* restrictive or permissive policy */ + List *roles; /* the roles associated with the policy */ + Node *qual; /* the policy's condition */ + Node *with_check; /* the policy's WITH CHECK condition. */ +} CreatePolicyStmt; + +/*---------------------- + * Alter POLICY Statement + *---------------------- + */ +typedef struct AlterPolicyStmt +{ + NodeTag type; + char *policy_name; /* Policy's name */ + RangeVar *table; /* the table name the policy applies to */ + List *roles; /* the roles associated with the policy */ + Node *qual; /* the policy's condition */ + Node *with_check; /* the policy's WITH CHECK condition. */ +} AlterPolicyStmt; + +/*---------------------- + * Create ACCESS METHOD Statement + *---------------------- + */ +typedef struct CreateAmStmt +{ + NodeTag type; + char *amname; /* access method name */ + List *handler_name; /* handler function name */ + char amtype; /* type of access method */ +} CreateAmStmt; + +/* ---------------------- + * Create TRIGGER Statement + * ---------------------- + */ +typedef struct CreateTrigStmt +{ + NodeTag type; + bool replace; /* replace trigger if already exists */ + bool isconstraint; /* This is a constraint trigger */ + char *trigname; /* TRIGGER's name */ + RangeVar *relation; /* relation trigger is on */ + List *funcname; /* qual. name of function to call */ + List *args; /* list of String or NIL */ + bool row; /* ROW/STATEMENT */ + /* timing uses the TRIGGER_TYPE bits defined in catalog/pg_trigger.h */ + int16 timing; /* BEFORE, AFTER, or INSTEAD */ + /* events uses the TRIGGER_TYPE bits defined in catalog/pg_trigger.h */ + int16 events; /* "OR" of INSERT/UPDATE/DELETE/TRUNCATE */ + List *columns; /* column names, or NIL for all columns */ + Node *whenClause; /* qual expression, or NULL if none */ + /* explicitly named transition data */ + List *transitionRels; /* TriggerTransition nodes, or NIL if none */ + /* The remaining fields are only used for constraint triggers */ + bool deferrable; /* [NOT] DEFERRABLE */ + bool initdeferred; /* INITIALLY {DEFERRED|IMMEDIATE} */ + RangeVar *constrrel; /* opposite relation, if RI trigger */ +} CreateTrigStmt; + +/* ---------------------- + * Create EVENT TRIGGER Statement + * ---------------------- + */ +typedef struct CreateEventTrigStmt +{ + NodeTag type; + char *trigname; /* TRIGGER's name */ + char *eventname; /* event's identifier */ + List *whenclause; /* list of DefElems indicating filtering */ + List *funcname; /* qual. name of function to call */ +} CreateEventTrigStmt; + +/* ---------------------- + * Alter EVENT TRIGGER Statement + * ---------------------- + */ +typedef struct AlterEventTrigStmt +{ + NodeTag type; + char *trigname; /* TRIGGER's name */ + char tgenabled; /* trigger's firing configuration WRT + * session_replication_role */ +} AlterEventTrigStmt; + +/* ---------------------- + * Create LANGUAGE Statements + * ---------------------- + */ +typedef struct CreatePLangStmt +{ + NodeTag type; + bool replace; /* T => replace if already exists */ + char *plname; /* PL name */ + List *plhandler; /* PL call handler function (qual. name) */ + List *plinline; /* optional inline function (qual. name) */ + List *plvalidator; /* optional validator function (qual. name) */ + bool pltrusted; /* PL is trusted */ +} CreatePLangStmt; + +/* ---------------------- + * Create/Alter/Drop Role Statements + * + * Note: these node types are also used for the backwards-compatible + * Create/Alter/Drop User/Group statements. In the ALTER and DROP cases + * there's really no need to distinguish what the original spelling was, + * but for CREATE we mark the type because the defaults vary. + * ---------------------- + */ +typedef enum RoleStmtType +{ + ROLESTMT_ROLE, + ROLESTMT_USER, + ROLESTMT_GROUP +} RoleStmtType; + +typedef struct CreateRoleStmt +{ + NodeTag type; + RoleStmtType stmt_type; /* ROLE/USER/GROUP */ + char *role; /* role name */ + List *options; /* List of DefElem nodes */ +} CreateRoleStmt; + +typedef struct AlterRoleStmt +{ + NodeTag type; + RoleSpec *role; /* role */ + List *options; /* List of DefElem nodes */ + int action; /* +1 = add members, -1 = drop members */ +} AlterRoleStmt; + +typedef struct AlterRoleSetStmt +{ + NodeTag type; + RoleSpec *role; /* role */ + char *database; /* database name, or NULL */ + VariableSetStmt *setstmt; /* SET or RESET subcommand */ +} AlterRoleSetStmt; + +typedef struct DropRoleStmt +{ + NodeTag type; + List *roles; /* List of roles to remove */ + bool missing_ok; /* skip error if a role is missing? */ +} DropRoleStmt; + +/* ---------------------- + * {Create|Alter} SEQUENCE Statement + * ---------------------- + */ + +typedef struct CreateSeqStmt +{ + NodeTag type; + RangeVar *sequence; /* the sequence to create */ + List *options; + Oid ownerId; /* ID of owner, or InvalidOid for default */ + bool for_identity; + bool if_not_exists; /* just do nothing if it already exists? */ +} CreateSeqStmt; + +typedef struct AlterSeqStmt +{ + NodeTag type; + RangeVar *sequence; /* the sequence to alter */ + List *options; + bool for_identity; + bool missing_ok; /* skip error if a role is missing? */ +} AlterSeqStmt; + +/* ---------------------- + * Create {Aggregate|Operator|Type} Statement + * ---------------------- + */ +typedef struct DefineStmt +{ + NodeTag type; + ObjectType kind; /* aggregate, operator, type */ + bool oldstyle; /* hack to signal old CREATE AGG syntax */ + List *defnames; /* qualified name (list of String) */ + List *args; /* a list of TypeName (if needed) */ + List *definition; /* a list of DefElem */ + bool if_not_exists; /* just do nothing if it already exists? */ + bool replace; /* replace if already exists? */ +} DefineStmt; + +/* ---------------------- + * Create Domain Statement + * ---------------------- + */ +typedef struct CreateDomainStmt +{ + NodeTag type; + List *domainname; /* qualified name (list of String) */ + TypeName *typeName; /* the base type */ + CollateClause *collClause; /* untransformed COLLATE spec, if any */ + List *constraints; /* constraints (list of Constraint nodes) */ +} CreateDomainStmt; + +/* ---------------------- + * Create Operator Class Statement + * ---------------------- + */ +typedef struct CreateOpClassStmt +{ + NodeTag type; + List *opclassname; /* qualified name (list of String) */ + List *opfamilyname; /* qualified name (ditto); NIL if omitted */ + char *amname; /* name of index AM opclass is for */ + TypeName *datatype; /* datatype of indexed column */ + List *items; /* List of CreateOpClassItem nodes */ + bool isDefault; /* Should be marked as default for type? */ +} CreateOpClassStmt; + +#define OPCLASS_ITEM_OPERATOR 1 +#define OPCLASS_ITEM_FUNCTION 2 +#define OPCLASS_ITEM_STORAGETYPE 3 + +typedef struct CreateOpClassItem +{ + NodeTag type; + int itemtype; /* see codes above */ + ObjectWithArgs *name; /* operator or function name and args */ + int number; /* strategy num or support proc num */ + List *order_family; /* only used for ordering operators */ + List *class_args; /* amproclefttype/amprocrighttype or + * amoplefttype/amoprighttype */ + /* fields used for a storagetype item: */ + TypeName *storedtype; /* datatype stored in index */ +} CreateOpClassItem; + +/* ---------------------- + * Create Operator Family Statement + * ---------------------- + */ +typedef struct CreateOpFamilyStmt +{ + NodeTag type; + List *opfamilyname; /* qualified name (list of String) */ + char *amname; /* name of index AM opfamily is for */ +} CreateOpFamilyStmt; + +/* ---------------------- + * Alter Operator Family Statement + * ---------------------- + */ +typedef struct AlterOpFamilyStmt +{ + NodeTag type; + List *opfamilyname; /* qualified name (list of String) */ + char *amname; /* name of index AM opfamily is for */ + bool isDrop; /* ADD or DROP the items? */ + List *items; /* List of CreateOpClassItem nodes */ +} AlterOpFamilyStmt; + +/* ---------------------- + * Drop Table|Sequence|View|Index|Type|Domain|Conversion|Schema Statement + * ---------------------- + */ + +typedef struct DropStmt +{ + NodeTag type; + List *objects; /* list of names */ + ObjectType removeType; /* object type */ + DropBehavior behavior; /* RESTRICT or CASCADE behavior */ + bool missing_ok; /* skip error if object is missing? */ + bool concurrent; /* drop index concurrently? */ +} DropStmt; + +/* ---------------------- + * Truncate Table Statement + * ---------------------- + */ +typedef struct TruncateStmt +{ + NodeTag type; + List *relations; /* relations (RangeVars) to be truncated */ + bool restart_seqs; /* restart owned sequences? */ + DropBehavior behavior; /* RESTRICT or CASCADE behavior */ +} TruncateStmt; + +/* ---------------------- + * Comment On Statement + * ---------------------- + */ +typedef struct CommentStmt +{ + NodeTag type; + ObjectType objtype; /* Object's type */ + Node *object; /* Qualified name of the object */ + char *comment; /* Comment to insert, or NULL to remove */ +} CommentStmt; + +/* ---------------------- + * SECURITY LABEL Statement + * ---------------------- + */ +typedef struct SecLabelStmt +{ + NodeTag type; + ObjectType objtype; /* Object's type */ + Node *object; /* Qualified name of the object */ + char *provider; /* Label provider (or NULL) */ + char *label; /* New security label to be assigned */ +} SecLabelStmt; + +/* ---------------------- + * Declare Cursor Statement + * + * The "query" field is initially a raw parse tree, and is converted to a + * Query node during parse analysis. Note that rewriting and planning + * of the query are always postponed until execution. + * ---------------------- + */ +#define CURSOR_OPT_BINARY 0x0001 /* BINARY */ +#define CURSOR_OPT_SCROLL 0x0002 /* SCROLL explicitly given */ +#define CURSOR_OPT_NO_SCROLL 0x0004 /* NO SCROLL explicitly given */ +#define CURSOR_OPT_INSENSITIVE 0x0008 /* INSENSITIVE */ +#define CURSOR_OPT_ASENSITIVE 0x0010 /* ASENSITIVE */ +#define CURSOR_OPT_HOLD 0x0020 /* WITH HOLD */ +/* these planner-control flags do not correspond to any SQL grammar: */ +#define CURSOR_OPT_FAST_PLAN 0x0100 /* prefer fast-start plan */ +#define CURSOR_OPT_GENERIC_PLAN 0x0200 /* force use of generic plan */ +#define CURSOR_OPT_CUSTOM_PLAN 0x0400 /* force use of custom plan */ +#define CURSOR_OPT_PARALLEL_OK 0x0800 /* parallel mode OK */ + +typedef struct DeclareCursorStmt +{ + NodeTag type; + char *portalname; /* name of the portal (cursor) */ + int options; /* bitmask of options (see above) */ + Node *query; /* the query (see comments above) */ +} DeclareCursorStmt; + +/* ---------------------- + * Close Portal Statement + * ---------------------- + */ +typedef struct ClosePortalStmt +{ + NodeTag type; + char *portalname; /* name of the portal (cursor) */ + /* NULL means CLOSE ALL */ +} ClosePortalStmt; + +/* ---------------------- + * Fetch Statement (also Move) + * ---------------------- + */ +typedef enum FetchDirection +{ + /* for these, howMany is how many rows to fetch; FETCH_ALL means ALL */ + FETCH_FORWARD, + FETCH_BACKWARD, + /* for these, howMany indicates a position; only one row is fetched */ + FETCH_ABSOLUTE, + FETCH_RELATIVE +} FetchDirection; + +#define FETCH_ALL LONG_MAX + +typedef struct FetchStmt +{ + NodeTag type; + FetchDirection direction; /* see above */ + long howMany; /* number of rows, or position argument */ + char *portalname; /* name of portal (cursor) */ + bool ismove; /* true if MOVE */ +} FetchStmt; + +/* ---------------------- + * Create Index Statement + * + * This represents creation of an index and/or an associated constraint. + * If isconstraint is true, we should create a pg_constraint entry along + * with the index. But if indexOid isn't InvalidOid, we are not creating an + * index, just a UNIQUE/PKEY constraint using an existing index. isconstraint + * must always be true in this case, and the fields describing the index + * properties are empty. + * ---------------------- + */ +typedef struct IndexStmt +{ + NodeTag type; + char *idxname; /* name of new index, or NULL for default */ + RangeVar *relation; /* relation to build index on */ + char *accessMethod; /* name of access method (eg. btree) */ + char *tableSpace; /* tablespace, or NULL for default */ + List *indexParams; /* columns to index: a list of IndexElem */ + List *indexIncludingParams; /* additional columns to index: a list + * of IndexElem */ + List *options; /* WITH clause options: a list of DefElem */ + Node *whereClause; /* qualification (partial-index predicate) */ + List *excludeOpNames; /* exclusion operator names, or NIL if none */ + char *idxcomment; /* comment to apply to index, or NULL */ + Oid indexOid; /* OID of an existing index, if any */ + RelFileNumber oldNumber; /* relfilenumber of existing storage, if any */ + SubTransactionId oldCreateSubid; /* rd_createSubid of oldNumber */ + SubTransactionId oldFirstRelfilelocatorSubid; /* rd_firstRelfilelocatorSubid + * of oldNumber */ + bool unique; /* is index unique? */ + bool nulls_not_distinct; /* null treatment for UNIQUE constraints */ + bool primary; /* is index a primary key? */ + bool isconstraint; /* is it for a pkey/unique constraint? */ + bool deferrable; /* is the constraint DEFERRABLE? */ + bool initdeferred; /* is the constraint INITIALLY DEFERRED? */ + bool transformed; /* true when transformIndexStmt is finished */ + bool concurrent; /* should this be a concurrent index build? */ + bool if_not_exists; /* just do nothing if index already exists? */ + bool reset_default_tblspc; /* reset default_tablespace prior to + * executing */ +} IndexStmt; + +/* ---------------------- + * Create Statistics Statement + * ---------------------- + */ +typedef struct CreateStatsStmt +{ + NodeTag type; + List *defnames; /* qualified name (list of String) */ + List *stat_types; /* stat types (list of String) */ + List *exprs; /* expressions to build statistics on */ + List *relations; /* rels to build stats on (list of RangeVar) */ + char *stxcomment; /* comment to apply to stats, or NULL */ + bool transformed; /* true when transformStatsStmt is finished */ + bool if_not_exists; /* do nothing if stats name already exists */ +} CreateStatsStmt; + +/* + * StatsElem - statistics parameters (used in CREATE STATISTICS) + * + * For a plain attribute, 'name' is the name of the referenced table column + * and 'expr' is NULL. For an expression, 'name' is NULL and 'expr' is the + * expression tree. + */ +typedef struct StatsElem +{ + NodeTag type; + char *name; /* name of attribute to index, or NULL */ + Node *expr; /* expression to index, or NULL */ +} StatsElem; + + +/* ---------------------- + * Alter Statistics Statement + * ---------------------- + */ +typedef struct AlterStatsStmt +{ + NodeTag type; + List *defnames; /* qualified name (list of String) */ + int stxstattarget; /* statistics target */ + bool missing_ok; /* skip error if statistics object is missing */ +} AlterStatsStmt; + +/* ---------------------- + * Create Function Statement + * ---------------------- + */ +typedef struct CreateFunctionStmt +{ + NodeTag type; + bool is_procedure; /* it's really CREATE PROCEDURE */ + bool replace; /* T => replace if already exists */ + List *funcname; /* qualified name of function to create */ + List *parameters; /* a list of FunctionParameter */ + TypeName *returnType; /* the return type */ + List *options; /* a list of DefElem */ + Node *sql_body; +} CreateFunctionStmt; + +typedef enum FunctionParameterMode +{ + /* the assigned enum values appear in pg_proc, don't change 'em! */ + FUNC_PARAM_IN = 'i', /* input only */ + FUNC_PARAM_OUT = 'o', /* output only */ + FUNC_PARAM_INOUT = 'b', /* both */ + FUNC_PARAM_VARIADIC = 'v', /* variadic (always input) */ + FUNC_PARAM_TABLE = 't', /* table function output column */ + /* this is not used in pg_proc: */ + FUNC_PARAM_DEFAULT = 'd' /* default; effectively same as IN */ +} FunctionParameterMode; + +typedef struct FunctionParameter +{ + NodeTag type; + char *name; /* parameter name, or NULL if not given */ + TypeName *argType; /* TypeName for parameter type */ + FunctionParameterMode mode; /* IN/OUT/etc */ + Node *defexpr; /* raw default expr, or NULL if not given */ +} FunctionParameter; + +typedef struct AlterFunctionStmt +{ + NodeTag type; + ObjectType objtype; + ObjectWithArgs *func; /* name and args of function */ + List *actions; /* list of DefElem */ +} AlterFunctionStmt; + +/* ---------------------- + * DO Statement + * + * DoStmt is the raw parser output, InlineCodeBlock is the execution-time API + * ---------------------- + */ +typedef struct DoStmt +{ + NodeTag type; + List *args; /* List of DefElem nodes */ +} DoStmt; + +typedef struct InlineCodeBlock +{ + pg_node_attr(nodetag_only) /* this is not a member of parse trees */ + + NodeTag type; + char *source_text; /* source text of anonymous code block */ + Oid langOid; /* OID of selected language */ + bool langIsTrusted; /* trusted property of the language */ + bool atomic; /* atomic execution context */ +} InlineCodeBlock; + +/* ---------------------- + * CALL statement + * + * OUT-mode arguments are removed from the transformed funcexpr. The outargs + * list contains copies of the expressions for all output arguments, in the + * order of the procedure's declared arguments. (outargs is never evaluated, + * but is useful to the caller as a reference for what to assign to.) + * The transformed call state is not relevant in the query jumbling, only the + * function call is. + * ---------------------- + */ +typedef struct CallStmt +{ + NodeTag type; + FuncCall *funccall; /* from the parser */ + /* transformed call, with only input args */ + FuncExpr *funcexpr pg_node_attr(query_jumble_ignore); + /* transformed output-argument expressions */ + List *outargs pg_node_attr(query_jumble_ignore); +} CallStmt; + +typedef struct CallContext +{ + pg_node_attr(nodetag_only) /* this is not a member of parse trees */ + + NodeTag type; + bool atomic; +} CallContext; + +/* ---------------------- + * Alter Object Rename Statement + * ---------------------- + */ +typedef struct RenameStmt +{ + NodeTag type; + ObjectType renameType; /* OBJECT_TABLE, OBJECT_COLUMN, etc */ + ObjectType relationType; /* if column name, associated relation type */ + RangeVar *relation; /* in case it's a table */ + Node *object; /* in case it's some other object */ + char *subname; /* name of contained object (column, rule, + * trigger, etc) */ + char *newname; /* the new name */ + DropBehavior behavior; /* RESTRICT or CASCADE behavior */ + bool missing_ok; /* skip error if missing? */ +} RenameStmt; + +/* ---------------------- + * ALTER object DEPENDS ON EXTENSION extname + * ---------------------- + */ +typedef struct AlterObjectDependsStmt +{ + NodeTag type; + ObjectType objectType; /* OBJECT_FUNCTION, OBJECT_TRIGGER, etc */ + RangeVar *relation; /* in case a table is involved */ + Node *object; /* name of the object */ + String *extname; /* extension name */ + bool remove; /* set true to remove dep rather than add */ +} AlterObjectDependsStmt; + +/* ---------------------- + * ALTER object SET SCHEMA Statement + * ---------------------- + */ +typedef struct AlterObjectSchemaStmt +{ + NodeTag type; + ObjectType objectType; /* OBJECT_TABLE, OBJECT_TYPE, etc */ + RangeVar *relation; /* in case it's a table */ + Node *object; /* in case it's some other object */ + char *newschema; /* the new schema */ + bool missing_ok; /* skip error if missing? */ +} AlterObjectSchemaStmt; + +/* ---------------------- + * Alter Object Owner Statement + * ---------------------- + */ +typedef struct AlterOwnerStmt +{ + NodeTag type; + ObjectType objectType; /* OBJECT_TABLE, OBJECT_TYPE, etc */ + RangeVar *relation; /* in case it's a table */ + Node *object; /* in case it's some other object */ + RoleSpec *newowner; /* the new owner */ +} AlterOwnerStmt; + +/* ---------------------- + * Alter Operator Set ( this-n-that ) + * ---------------------- + */ +typedef struct AlterOperatorStmt +{ + NodeTag type; + ObjectWithArgs *opername; /* operator name and argument types */ + List *options; /* List of DefElem nodes */ +} AlterOperatorStmt; + +/* ------------------------ + * Alter Type Set ( this-n-that ) + * ------------------------ + */ +typedef struct AlterTypeStmt +{ + NodeTag type; + List *typeName; /* type name (possibly qualified) */ + List *options; /* List of DefElem nodes */ +} AlterTypeStmt; + +/* ---------------------- + * Create Rule Statement + * ---------------------- + */ +typedef struct RuleStmt +{ + NodeTag type; + RangeVar *relation; /* relation the rule is for */ + char *rulename; /* name of the rule */ + Node *whereClause; /* qualifications */ + CmdType event; /* SELECT, INSERT, etc */ + bool instead; /* is a 'do instead'? */ + List *actions; /* the action statements */ + bool replace; /* OR REPLACE */ +} RuleStmt; + +/* ---------------------- + * Notify Statement + * ---------------------- + */ +typedef struct NotifyStmt +{ + NodeTag type; + char *conditionname; /* condition name to notify */ + char *payload; /* the payload string, or NULL if none */ +} NotifyStmt; + +/* ---------------------- + * Listen Statement + * ---------------------- + */ +typedef struct ListenStmt +{ + NodeTag type; + char *conditionname; /* condition name to listen on */ +} ListenStmt; + +/* ---------------------- + * Unlisten Statement + * ---------------------- + */ +typedef struct UnlistenStmt +{ + NodeTag type; + char *conditionname; /* name to unlisten on, or NULL for all */ +} UnlistenStmt; + +/* ---------------------- + * {Begin|Commit|Rollback} Transaction Statement + * ---------------------- + */ +typedef enum TransactionStmtKind +{ + TRANS_STMT_BEGIN, + TRANS_STMT_START, /* semantically identical to BEGIN */ + TRANS_STMT_COMMIT, + TRANS_STMT_ROLLBACK, + TRANS_STMT_SAVEPOINT, + TRANS_STMT_RELEASE, + TRANS_STMT_ROLLBACK_TO, + TRANS_STMT_PREPARE, + TRANS_STMT_COMMIT_PREPARED, + TRANS_STMT_ROLLBACK_PREPARED +} TransactionStmtKind; + +typedef struct TransactionStmt +{ + NodeTag type; + TransactionStmtKind kind; /* see above */ + List *options; /* for BEGIN/START commands */ + char *savepoint_name; /* for savepoint commands */ + char *gid; /* for two-phase-commit related commands */ + bool chain; /* AND CHAIN option */ +} TransactionStmt; + +/* ---------------------- + * Create Type Statement, composite types + * ---------------------- + */ +typedef struct CompositeTypeStmt +{ + NodeTag type; + RangeVar *typevar; /* the composite type to be created */ + List *coldeflist; /* list of ColumnDef nodes */ +} CompositeTypeStmt; + +/* ---------------------- + * Create Type Statement, enum types + * ---------------------- + */ +typedef struct CreateEnumStmt +{ + NodeTag type; + List *typeName; /* qualified name (list of String) */ + List *vals; /* enum values (list of String) */ +} CreateEnumStmt; + +/* ---------------------- + * Create Type Statement, range types + * ---------------------- + */ +typedef struct CreateRangeStmt +{ + NodeTag type; + List *typeName; /* qualified name (list of String) */ + List *params; /* range parameters (list of DefElem) */ +} CreateRangeStmt; + +/* ---------------------- + * Alter Type Statement, enum types + * ---------------------- + */ +typedef struct AlterEnumStmt +{ + NodeTag type; + List *typeName; /* qualified name (list of String) */ + char *oldVal; /* old enum value's name, if renaming */ + char *newVal; /* new enum value's name */ + char *newValNeighbor; /* neighboring enum value, if specified */ + bool newValIsAfter; /* place new enum value after neighbor? */ + bool skipIfNewValExists; /* no error if new already exists? */ +} AlterEnumStmt; + +/* ---------------------- + * Create View Statement + * ---------------------- + */ +typedef enum ViewCheckOption +{ + NO_CHECK_OPTION, + LOCAL_CHECK_OPTION, + CASCADED_CHECK_OPTION +} ViewCheckOption; + +typedef struct ViewStmt +{ + NodeTag type; + RangeVar *view; /* the view to be created */ + List *aliases; /* target column names */ + Node *query; /* the SELECT query (as a raw parse tree) */ + bool replace; /* replace an existing view? */ + List *options; /* options from WITH clause */ + ViewCheckOption withCheckOption; /* WITH CHECK OPTION */ +} ViewStmt; + +/* ---------------------- + * Load Statement + * ---------------------- + */ +typedef struct LoadStmt +{ + NodeTag type; + char *filename; /* file to load */ +} LoadStmt; + +/* ---------------------- + * Createdb Statement + * ---------------------- + */ +typedef struct CreatedbStmt +{ + NodeTag type; + char *dbname; /* name of database to create */ + List *options; /* List of DefElem nodes */ +} CreatedbStmt; + +/* ---------------------- + * Alter Database + * ---------------------- + */ +typedef struct AlterDatabaseStmt +{ + NodeTag type; + char *dbname; /* name of database to alter */ + List *options; /* List of DefElem nodes */ +} AlterDatabaseStmt; + +typedef struct AlterDatabaseRefreshCollStmt +{ + NodeTag type; + char *dbname; +} AlterDatabaseRefreshCollStmt; + +typedef struct AlterDatabaseSetStmt +{ + NodeTag type; + char *dbname; /* database name */ + VariableSetStmt *setstmt; /* SET or RESET subcommand */ +} AlterDatabaseSetStmt; + +/* ---------------------- + * Dropdb Statement + * ---------------------- + */ +typedef struct DropdbStmt +{ + NodeTag type; + char *dbname; /* database to drop */ + bool missing_ok; /* skip error if db is missing? */ + List *options; /* currently only FORCE is supported */ +} DropdbStmt; + +/* ---------------------- + * Alter System Statement + * ---------------------- + */ +typedef struct AlterSystemStmt +{ + NodeTag type; + VariableSetStmt *setstmt; /* SET subcommand */ +} AlterSystemStmt; + +/* ---------------------- + * Cluster Statement (support pbrown's cluster index implementation) + * ---------------------- + */ +typedef struct ClusterStmt +{ + NodeTag type; + RangeVar *relation; /* relation being indexed, or NULL if all */ + char *indexname; /* original index defined */ + List *params; /* list of DefElem nodes */ +} ClusterStmt; + +/* ---------------------- + * Vacuum and Analyze Statements + * + * Even though these are nominally two statements, it's convenient to use + * just one node type for both. + * ---------------------- + */ +typedef struct VacuumStmt +{ + NodeTag type; + List *options; /* list of DefElem nodes */ + List *rels; /* list of VacuumRelation, or NIL for all */ + bool is_vacuumcmd; /* true for VACUUM, false for ANALYZE */ +} VacuumStmt; + +/* + * Info about a single target table of VACUUM/ANALYZE. + * + * If the OID field is set, it always identifies the table to process. + * Then the relation field can be NULL; if it isn't, it's used only to report + * failure to open/lock the relation. + */ +typedef struct VacuumRelation +{ + NodeTag type; + RangeVar *relation; /* table name to process, or NULL */ + Oid oid; /* table's OID; InvalidOid if not looked up */ + List *va_cols; /* list of column names, or NIL for all */ +} VacuumRelation; + +/* ---------------------- + * Explain Statement + * + * The "query" field is initially a raw parse tree, and is converted to a + * Query node during parse analysis. Note that rewriting and planning + * of the query are always postponed until execution. + * ---------------------- + */ +typedef struct ExplainStmt +{ + NodeTag type; + Node *query; /* the query (see comments above) */ + List *options; /* list of DefElem nodes */ +} ExplainStmt; + +/* ---------------------- + * CREATE TABLE AS Statement (a/k/a SELECT INTO) + * + * A query written as CREATE TABLE AS will produce this node type natively. + * A query written as SELECT ... INTO will be transformed to this form during + * parse analysis. + * A query written as CREATE MATERIALIZED view will produce this node type, + * during parse analysis, since it needs all the same data. + * + * The "query" field is handled similarly to EXPLAIN, though note that it + * can be a SELECT or an EXECUTE, but not other DML statements. + * ---------------------- + */ +typedef struct CreateTableAsStmt +{ + NodeTag type; + Node *query; /* the query (see comments above) */ + IntoClause *into; /* destination table */ + ObjectType objtype; /* OBJECT_TABLE or OBJECT_MATVIEW */ + bool is_select_into; /* it was written as SELECT INTO */ + bool if_not_exists; /* just do nothing if it already exists? */ +} CreateTableAsStmt; + +/* ---------------------- + * REFRESH MATERIALIZED VIEW Statement + * ---------------------- + */ +typedef struct RefreshMatViewStmt +{ + NodeTag type; + bool concurrent; /* allow concurrent access? */ + bool skipData; /* true for WITH NO DATA */ + RangeVar *relation; /* relation to insert into */ +} RefreshMatViewStmt; + +/* ---------------------- + * Checkpoint Statement + * ---------------------- + */ +typedef struct CheckPointStmt +{ + NodeTag type; +} CheckPointStmt; + +/* ---------------------- + * Discard Statement + * ---------------------- + */ + +typedef enum DiscardMode +{ + DISCARD_ALL, + DISCARD_PLANS, + DISCARD_SEQUENCES, + DISCARD_TEMP +} DiscardMode; + +typedef struct DiscardStmt +{ + NodeTag type; + DiscardMode target; +} DiscardStmt; + +/* ---------------------- + * LOCK Statement + * ---------------------- + */ +typedef struct LockStmt +{ + NodeTag type; + List *relations; /* relations to lock */ + int mode; /* lock mode */ + bool nowait; /* no wait mode */ +} LockStmt; + +/* ---------------------- + * SET CONSTRAINTS Statement + * ---------------------- + */ +typedef struct ConstraintsSetStmt +{ + NodeTag type; + List *constraints; /* List of names as RangeVars */ + bool deferred; +} ConstraintsSetStmt; + +/* ---------------------- + * REINDEX Statement + * ---------------------- + */ +typedef enum ReindexObjectType +{ + REINDEX_OBJECT_INDEX, /* index */ + REINDEX_OBJECT_TABLE, /* table or materialized view */ + REINDEX_OBJECT_SCHEMA, /* schema */ + REINDEX_OBJECT_SYSTEM, /* system catalogs */ + REINDEX_OBJECT_DATABASE /* database */ +} ReindexObjectType; + +typedef struct ReindexStmt +{ + NodeTag type; + ReindexObjectType kind; /* REINDEX_OBJECT_INDEX, REINDEX_OBJECT_TABLE, + * etc. */ + RangeVar *relation; /* Table or index to reindex */ + const char *name; /* name of database to reindex */ + List *params; /* list of DefElem nodes */ +} ReindexStmt; + +/* ---------------------- + * CREATE CONVERSION Statement + * ---------------------- + */ +typedef struct CreateConversionStmt +{ + NodeTag type; + List *conversion_name; /* Name of the conversion */ + char *for_encoding_name; /* source encoding name */ + char *to_encoding_name; /* destination encoding name */ + List *func_name; /* qualified conversion function name */ + bool def; /* is this a default conversion? */ +} CreateConversionStmt; + +/* ---------------------- + * CREATE CAST Statement + * ---------------------- + */ +typedef struct CreateCastStmt +{ + NodeTag type; + TypeName *sourcetype; + TypeName *targettype; + ObjectWithArgs *func; + CoercionContext context; + bool inout; +} CreateCastStmt; + +/* ---------------------- + * CREATE TRANSFORM Statement + * ---------------------- + */ +typedef struct CreateTransformStmt +{ + NodeTag type; + bool replace; + TypeName *type_name; + char *lang; + ObjectWithArgs *fromsql; + ObjectWithArgs *tosql; +} CreateTransformStmt; + +/* ---------------------- + * PREPARE Statement + * ---------------------- + */ +typedef struct PrepareStmt +{ + NodeTag type; + char *name; /* Name of plan, arbitrary */ + List *argtypes; /* Types of parameters (List of TypeName) */ + Node *query; /* The query itself (as a raw parsetree) */ +} PrepareStmt; + + +/* ---------------------- + * EXECUTE Statement + * ---------------------- + */ + +typedef struct ExecuteStmt +{ + NodeTag type; + char *name; /* The name of the plan to execute */ + List *params; /* Values to assign to parameters */ +} ExecuteStmt; + + +/* ---------------------- + * DEALLOCATE Statement + * ---------------------- + */ +typedef struct DeallocateStmt +{ + NodeTag type; + char *name; /* The name of the plan to remove */ + /* NULL means DEALLOCATE ALL */ +} DeallocateStmt; + +/* + * DROP OWNED statement + */ +typedef struct DropOwnedStmt +{ + NodeTag type; + List *roles; + DropBehavior behavior; +} DropOwnedStmt; + +/* + * REASSIGN OWNED statement + */ +typedef struct ReassignOwnedStmt +{ + NodeTag type; + List *roles; + RoleSpec *newrole; +} ReassignOwnedStmt; + +/* + * TS Dictionary stmts: DefineStmt, RenameStmt and DropStmt are default + */ +typedef struct AlterTSDictionaryStmt +{ + NodeTag type; + List *dictname; /* qualified name (list of String) */ + List *options; /* List of DefElem nodes */ +} AlterTSDictionaryStmt; + +/* + * TS Configuration stmts: DefineStmt, RenameStmt and DropStmt are default + */ +typedef enum AlterTSConfigType +{ + ALTER_TSCONFIG_ADD_MAPPING, + ALTER_TSCONFIG_ALTER_MAPPING_FOR_TOKEN, + ALTER_TSCONFIG_REPLACE_DICT, + ALTER_TSCONFIG_REPLACE_DICT_FOR_TOKEN, + ALTER_TSCONFIG_DROP_MAPPING +} AlterTSConfigType; + +typedef struct AlterTSConfigurationStmt +{ + NodeTag type; + AlterTSConfigType kind; /* ALTER_TSCONFIG_ADD_MAPPING, etc */ + List *cfgname; /* qualified name (list of String) */ + + /* + * dicts will be non-NIL if ADD/ALTER MAPPING was specified. If dicts is + * NIL, but tokentype isn't, DROP MAPPING was specified. + */ + List *tokentype; /* list of String */ + List *dicts; /* list of list of String */ + bool override; /* if true - remove old variant */ + bool replace; /* if true - replace dictionary by another */ + bool missing_ok; /* for DROP - skip error if missing? */ +} AlterTSConfigurationStmt; + +typedef struct PublicationTable +{ + NodeTag type; + RangeVar *relation; /* relation to be published */ + Node *whereClause; /* qualifications */ + List *columns; /* List of columns in a publication table */ +} PublicationTable; + +/* + * Publication object type + */ +typedef enum PublicationObjSpecType +{ + PUBLICATIONOBJ_TABLE, /* A table */ + PUBLICATIONOBJ_TABLES_IN_SCHEMA, /* All tables in schema */ + PUBLICATIONOBJ_TABLES_IN_CUR_SCHEMA, /* All tables in first element of + * search_path */ + PUBLICATIONOBJ_CONTINUATION /* Continuation of previous type */ +} PublicationObjSpecType; + +typedef struct PublicationObjSpec +{ + NodeTag type; + PublicationObjSpecType pubobjtype; /* type of this publication object */ + char *name; + PublicationTable *pubtable; + int location; /* token location, or -1 if unknown */ +} PublicationObjSpec; + +typedef struct CreatePublicationStmt +{ + NodeTag type; + char *pubname; /* Name of the publication */ + List *options; /* List of DefElem nodes */ + List *pubobjects; /* Optional list of publication objects */ + bool for_all_tables; /* Special publication for all tables in db */ +} CreatePublicationStmt; + +typedef enum AlterPublicationAction +{ + AP_AddObjects, /* add objects to publication */ + AP_DropObjects, /* remove objects from publication */ + AP_SetObjects /* set list of objects */ +} AlterPublicationAction; + +typedef struct AlterPublicationStmt +{ + NodeTag type; + char *pubname; /* Name of the publication */ + + /* parameters used for ALTER PUBLICATION ... WITH */ + List *options; /* List of DefElem nodes */ + + /* + * Parameters used for ALTER PUBLICATION ... ADD/DROP/SET publication + * objects. + */ + List *pubobjects; /* Optional list of publication objects */ + bool for_all_tables; /* Special publication for all tables in db */ + AlterPublicationAction action; /* What action to perform with the given + * objects */ +} AlterPublicationStmt; + +typedef struct CreateSubscriptionStmt +{ + NodeTag type; + char *subname; /* Name of the subscription */ + char *conninfo; /* Connection string to publisher */ + List *publication; /* One or more publication to subscribe to */ + List *options; /* List of DefElem nodes */ +} CreateSubscriptionStmt; + +typedef enum AlterSubscriptionType +{ + ALTER_SUBSCRIPTION_OPTIONS, + ALTER_SUBSCRIPTION_CONNECTION, + ALTER_SUBSCRIPTION_SET_PUBLICATION, + ALTER_SUBSCRIPTION_ADD_PUBLICATION, + ALTER_SUBSCRIPTION_DROP_PUBLICATION, + ALTER_SUBSCRIPTION_REFRESH, + ALTER_SUBSCRIPTION_ENABLED, + ALTER_SUBSCRIPTION_SKIP +} AlterSubscriptionType; + +typedef struct AlterSubscriptionStmt +{ + NodeTag type; + AlterSubscriptionType kind; /* ALTER_SUBSCRIPTION_OPTIONS, etc */ + char *subname; /* Name of the subscription */ + char *conninfo; /* Connection string to publisher */ + List *publication; /* One or more publication to subscribe to */ + List *options; /* List of DefElem nodes */ +} AlterSubscriptionStmt; + +typedef struct DropSubscriptionStmt +{ + NodeTag type; + char *subname; /* Name of the subscription */ + bool missing_ok; /* Skip error if missing? */ + DropBehavior behavior; /* RESTRICT or CASCADE behavior */ +} DropSubscriptionStmt; + +#endif /* PARSENODES_H */ |