Adding upstream version 14.5.upstream/14.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

36 files changed, 2524 insertions, 0 deletions

diff --git a/src/include/commands/alter.h b/src/include/commands/alter.h
new file mode 100644
index 0000000..7b12e9a
--- /dev/null
+++ b/src/include/commands/alter.h
@@ -0,0 +1,35 @@
+/*-------------------------------------------------------------------------
+ *
+ * alter.h
+ *	  prototypes for commands/alter.c
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/alter.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef ALTER_H
+#define ALTER_H
+
+#include "catalog/dependency.h"
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+#include "utils/relcache.h"
+
+extern ObjectAddress ExecRenameStmt(RenameStmt *stmt);
+
+extern ObjectAddress ExecAlterObjectDependsStmt(AlterObjectDependsStmt *stmt,
+												ObjectAddress *refAddress);
+extern ObjectAddress ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt,
+											   ObjectAddress *oldSchemaAddr);
+extern Oid	AlterObjectNamespace_oid(Oid classId, Oid objid, Oid nspOid,
+									 ObjectAddresses *objsMoved);
+
+extern ObjectAddress ExecAlterOwnerStmt(AlterOwnerStmt *stmt);
+extern void AlterObjectOwner_internal(Relation catalog, Oid objectId,
+									  Oid new_ownerId);
+
+#endif							/* ALTER_H */
diff --git a/src/include/commands/async.h b/src/include/commands/async.h
new file mode 100644
index 0000000..85bfb24
--- /dev/null
+++ b/src/include/commands/async.h
@@ -0,0 +1,54 @@
+/*-------------------------------------------------------------------------
+ *
+ * async.h
+ *	  Asynchronous notification: NOTIFY, LISTEN, UNLISTEN
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/async.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef ASYNC_H
+#define ASYNC_H
+
+#include <signal.h>
+
+/*
+ * The number of SLRU page buffers we use for the notification queue.
+ */
+#define NUM_NOTIFY_BUFFERS	8
+
+extern bool Trace_notify;
+extern volatile sig_atomic_t notifyInterruptPending;
+
+extern Size AsyncShmemSize(void);
+extern void AsyncShmemInit(void);
+
+extern void NotifyMyFrontEnd(const char *channel,
+							 const char *payload,
+							 int32 srcPid);
+
+/* notify-related SQL statements */
+extern void Async_Notify(const char *channel, const char *payload);
+extern void Async_Listen(const char *channel);
+extern void Async_Unlisten(const char *channel);
+extern void Async_UnlistenAll(void);
+
+/* perform (or cancel) outbound notify processing at transaction commit */
+extern void PreCommit_Notify(void);
+extern void AtCommit_Notify(void);
+extern void AtAbort_Notify(void);
+extern void AtSubCommit_Notify(void);
+extern void AtSubAbort_Notify(void);
+extern void AtPrepare_Notify(void);
+extern void ProcessCompletedNotifies(void);
+
+/* signal handler for inbound notifies (PROCSIG_NOTIFY_INTERRUPT) */
+extern void HandleNotifyInterrupt(void);
+
+/* process interrupts */
+extern void ProcessNotifyInterrupt(bool flush);
+
+#endif							/* ASYNC_H */
diff --git a/src/include/commands/cluster.h b/src/include/commands/cluster.h
new file mode 100644
index 0000000..a941f2a
--- /dev/null
+++ b/src/include/commands/cluster.h
@@ -0,0 +1,49 @@
+/*-------------------------------------------------------------------------
+ *
+ * cluster.h
+ *	  header file for postgres cluster command stuff
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994-5, Regents of the University of California
+ *
+ * src/include/commands/cluster.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef CLUSTER_H
+#define CLUSTER_H
+
+#include "nodes/parsenodes.h"
+#include "parser/parse_node.h"
+#include "storage/lock.h"
+#include "utils/relcache.h"
+
+
+/* flag bits for ClusterParams->flags */
+#define CLUOPT_RECHECK 0x01		/* recheck relation state */
+#define CLUOPT_VERBOSE 0x02		/* print progress info */
+
+/* options for CLUSTER */
+typedef struct ClusterParams
+{
+	bits32		options;		/* bitmask of CLUOPT_* */
+} ClusterParams;
+
+extern void cluster(ParseState *pstate, ClusterStmt *stmt, bool isTopLevel);
+extern void cluster_rel(Oid tableOid, Oid indexOid, ClusterParams *params);
+extern void check_index_is_clusterable(Relation OldHeap, Oid indexOid,
+									   bool recheck, LOCKMODE lockmode);
+extern void mark_index_clustered(Relation rel, Oid indexOid, bool is_internal);
+
+extern Oid	make_new_heap(Oid OIDOldHeap, Oid NewTableSpace, char relpersistence,
+						  LOCKMODE lockmode);
+extern void finish_heap_swap(Oid OIDOldHeap, Oid OIDNewHeap,
+							 bool is_system_catalog,
+							 bool swap_toast_by_content,
+							 bool check_constraints,
+							 bool is_internal,
+							 TransactionId frozenXid,
+							 MultiXactId minMulti,
+							 char newrelpersistence);
+
+#endif							/* CLUSTER_H */
diff --git a/src/include/commands/collationcmds.h b/src/include/commands/collationcmds.h
new file mode 100644
index 0000000..e49a5db
--- /dev/null
+++ b/src/include/commands/collationcmds.h
@@ -0,0 +1,25 @@
+/*-------------------------------------------------------------------------
+ *
+ * collationcmds.h
+ *	  prototypes for collationcmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/collationcmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef COLLATIONCMDS_H
+#define COLLATIONCMDS_H
+
+#include "catalog/objectaddress.h"
+#include "parser/parse_node.h"
+
+extern ObjectAddress DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_exists);
+extern void IsThereCollationInNamespace(const char *collname, Oid nspOid);
+extern ObjectAddress AlterCollation(AlterCollationStmt *stmt);
+
+#endif							/* COLLATIONCMDS_H */
diff --git a/src/include/commands/comment.h b/src/include/commands/comment.h
new file mode 100644
index 0000000..3a5f725
--- /dev/null
+++ b/src/include/commands/comment.h
@@ -0,0 +1,45 @@
+/*
+ * src/include/commands/comment.h
+ *
+ *-------------------------------------------------------------------------
+ *
+ * comment.h
+ *
+ * Prototypes for functions in commands/comment.c
+ *
+ * Copyright (c) 1999-2021, PostgreSQL Global Development Group
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef COMMENT_H
+#define COMMENT_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+/*------------------------------------------------------------------
+ * Function Prototypes --
+ *
+ * The following prototypes define the public functions of the comment
+ * related routines.  CommentObject() implements the SQL "COMMENT ON"
+ * command.  DeleteComments() deletes all comments for an object.
+ * CreateComments creates (or deletes, if comment is NULL) a comment
+ * for a specific key.  There are versions of these two methods for
+ * both normal and shared objects.
+ *------------------------------------------------------------------
+ */
+
+extern ObjectAddress CommentObject(CommentStmt *stmt);
+
+extern void DeleteComments(Oid oid, Oid classoid, int32 subid);
+
+extern void CreateComments(Oid oid, Oid classoid, int32 subid, const char *comment);
+
+extern void DeleteSharedComments(Oid oid, Oid classoid);
+
+extern void CreateSharedComments(Oid oid, Oid classoid, const char *comment);
+
+extern char *GetComment(Oid oid, Oid classoid, int32 subid);
+
+#endif							/* COMMENT_H */
diff --git a/src/include/commands/conversioncmds.h b/src/include/commands/conversioncmds.h
new file mode 100644
index 0000000..0438538
--- /dev/null
+++ b/src/include/commands/conversioncmds.h
@@ -0,0 +1,23 @@
+/*-------------------------------------------------------------------------
+ *
+ * conversioncmds.h
+ *	  prototypes for conversioncmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/conversioncmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef CONVERSIONCMDS_H
+#define CONVERSIONCMDS_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+extern ObjectAddress CreateConversionCommand(CreateConversionStmt *parsetree);
+
+#endif							/* CONVERSIONCMDS_H */
diff --git a/src/include/commands/copy.h b/src/include/commands/copy.h
new file mode 100644
index 0000000..264895d
--- /dev/null
+++ b/src/include/commands/copy.h
@@ -0,0 +1,89 @@
+/*-------------------------------------------------------------------------
+ *
+ * copy.h
+ *	  Definitions for using the POSTGRES copy command.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/copy.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef COPY_H
+#define COPY_H
+
+#include "nodes/execnodes.h"
+#include "nodes/parsenodes.h"
+#include "parser/parse_node.h"
+#include "tcop/dest.h"
+
+/*
+ * A struct to hold COPY options, in a parsed form. All of these are related
+ * to formatting, except for 'freeze', which doesn't really belong here, but
+ * it's expedient to parse it along with all the other options.
+ */
+typedef struct CopyFormatOptions
+{
+	/* parameters from the COPY command */
+	int			file_encoding;	/* file or remote side's character encoding,
+								 * -1 if not specified */
+	bool		binary;			/* binary format? */
+	bool		freeze;			/* freeze rows on loading? */
+	bool		csv_mode;		/* Comma Separated Value format? */
+	bool		header_line;	/* CSV header line? */
+	char	   *null_print;		/* NULL marker string (server encoding!) */
+	int			null_print_len; /* length of same */
+	char	   *null_print_client;	/* same converted to file encoding */
+	char	   *delim;			/* column delimiter (must be 1 byte) */
+	char	   *quote;			/* CSV quote char (must be 1 byte) */
+	char	   *escape;			/* CSV escape char (must be 1 byte) */
+	List	   *force_quote;	/* list of column names */
+	bool		force_quote_all;	/* FORCE_QUOTE *? */
+	bool	   *force_quote_flags;	/* per-column CSV FQ flags */
+	List	   *force_notnull;	/* list of column names */
+	bool	   *force_notnull_flags;	/* per-column CSV FNN flags */
+	List	   *force_null;		/* list of column names */
+	bool	   *force_null_flags;	/* per-column CSV FN flags */
+	bool		convert_selectively;	/* do selective binary conversion? */
+	List	   *convert_select; /* list of column names (can be NIL) */
+} CopyFormatOptions;
+
+/* These are private in commands/copy[from|to].c */
+typedef struct CopyFromStateData *CopyFromState;
+typedef struct CopyToStateData *CopyToState;
+
+typedef int (*copy_data_source_cb) (void *outbuf, int minread, int maxread);
+
+extern void DoCopy(ParseState *state, const CopyStmt *stmt,
+				   int stmt_location, int stmt_len,
+				   uint64 *processed);
+
+extern void ProcessCopyOptions(ParseState *pstate, CopyFormatOptions *ops_out, bool is_from, List *options);
+extern CopyFromState BeginCopyFrom(ParseState *pstate, Relation rel, Node *whereClause,
+								   const char *filename,
+								   bool is_program, copy_data_source_cb data_source_cb, List *attnamelist, List *options);
+extern void EndCopyFrom(CopyFromState cstate);
+extern bool NextCopyFrom(CopyFromState cstate, ExprContext *econtext,
+						 Datum *values, bool *nulls);
+extern bool NextCopyFromRawFields(CopyFromState cstate,
+								  char ***fields, int *nfields);
+extern void CopyFromErrorCallback(void *arg);
+
+extern uint64 CopyFrom(CopyFromState cstate);
+
+extern DestReceiver *CreateCopyDestReceiver(void);
+
+/*
+ * internal prototypes
+ */
+extern CopyToState BeginCopyTo(ParseState *pstate, Relation rel, RawStmt *query,
+							   Oid queryRelId, const char *filename, bool is_program,
+							   List *attnamelist, List *options);
+extern void EndCopyTo(CopyToState cstate);
+extern uint64 DoCopyTo(CopyToState cstate);
+extern List *CopyGetAttnums(TupleDesc tupDesc, Relation rel,
+							List *attnamelist);
+
+#endif							/* COPY_H */
diff --git a/src/include/commands/copyfrom_internal.h b/src/include/commands/copyfrom_internal.h
new file mode 100644
index 0000000..4d68d9c
--- /dev/null
+++ b/src/include/commands/copyfrom_internal.h
@@ -0,0 +1,172 @@
+/*-------------------------------------------------------------------------
+ *
+ * copyfrom_internal.h
+ *	  Internal definitions for COPY FROM command.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/copyfrom_internal.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef COPYFROM_INTERNAL_H
+#define COPYFROM_INTERNAL_H
+
+#include "commands/copy.h"
+#include "commands/trigger.h"
+
+/*
+ * Represents the different source cases we need to worry about at
+ * the bottom level
+ */
+typedef enum CopySource
+{
+	COPY_FILE,					/* from file (or a piped program) */
+	COPY_FRONTEND,				/* from frontend */
+	COPY_CALLBACK				/* from callback function */
+} CopySource;
+
+/*
+ *	Represents the end-of-line terminator type of the input
+ */
+typedef enum EolType
+{
+	EOL_UNKNOWN,
+	EOL_NL,
+	EOL_CR,
+	EOL_CRNL
+} EolType;
+
+/*
+ * Represents the heap insert method to be used during COPY FROM.
+ */
+typedef enum CopyInsertMethod
+{
+	CIM_SINGLE,					/* use table_tuple_insert or fdw routine */
+	CIM_MULTI,					/* always use table_multi_insert */
+	CIM_MULTI_CONDITIONAL		/* use table_multi_insert only if valid */
+} CopyInsertMethod;
+
+/*
+ * This struct contains all the state variables used throughout a COPY FROM
+ * operation.
+ */
+typedef struct CopyFromStateData
+{
+	/* low-level state data */
+	CopySource	copy_src;		/* type of copy source */
+	FILE	   *copy_file;		/* used if copy_src == COPY_FILE */
+	StringInfo	fe_msgbuf;		/* used if copy_src == COPY_NEW_FE */
+
+	EolType		eol_type;		/* EOL type of input */
+	int			file_encoding;	/* file or remote side's character encoding */
+	bool		need_transcoding;	/* file encoding diff from server? */
+	Oid			conversion_proc;	/* encoding conversion function */
+
+	/* parameters from the COPY command */
+	Relation	rel;			/* relation to copy from */
+	List	   *attnumlist;		/* integer list of attnums to copy */
+	char	   *filename;		/* filename, or NULL for STDIN */
+	bool		is_program;		/* is 'filename' a program to popen? */
+	copy_data_source_cb data_source_cb; /* function for reading data */
+
+	CopyFormatOptions opts;
+	bool	   *convert_select_flags;	/* per-column CSV/TEXT CS flags */
+	Node	   *whereClause;	/* WHERE condition (or NULL) */
+
+	/* these are just for error messages, see CopyFromErrorCallback */
+	const char *cur_relname;	/* table name for error messages */
+	uint64		cur_lineno;		/* line number for error messages */
+	const char *cur_attname;	/* current att for error messages */
+	const char *cur_attval;		/* current att value for error messages */
+
+	/*
+	 * Working state
+	 */
+	MemoryContext copycontext;	/* per-copy execution context */
+
+	AttrNumber	num_defaults;
+	FmgrInfo   *in_functions;	/* array of input functions for each attrs */
+	Oid		   *typioparams;	/* array of element types for in_functions */
+	int		   *defmap;			/* array of default att numbers */
+	ExprState **defexprs;		/* array of default att expressions */
+	bool		volatile_defexprs;	/* is any of defexprs volatile? */
+	List	   *range_table;
+	ExprState  *qualexpr;
+
+	TransitionCaptureState *transition_capture;
+
+	/*
+	 * These variables are used to reduce overhead in COPY FROM.
+	 *
+	 * attribute_buf holds the separated, de-escaped text for each field of
+	 * the current line.  The CopyReadAttributes functions return arrays of
+	 * pointers into this buffer.  We avoid palloc/pfree overhead by re-using
+	 * the buffer on each cycle.
+	 *
+	 * In binary COPY FROM, attribute_buf holds the binary data for the
+	 * current field, but the usage is otherwise similar.
+	 */
+	StringInfoData attribute_buf;
+
+	/* field raw data pointers found by COPY FROM */
+
+	int			max_fields;
+	char	  **raw_fields;
+
+	/*
+	 * Similarly, line_buf holds the whole input line being processed. The
+	 * input cycle is first to read the whole line into line_buf, and then
+	 * extract the individual attribute fields into attribute_buf.  line_buf
+	 * is preserved unmodified so that we can display it in error messages if
+	 * appropriate.  (In binary mode, line_buf is not used.)
+	 */
+	StringInfoData line_buf;
+	bool		line_buf_valid; /* contains the row being processed? */
+
+	/*
+	 * input_buf holds input data, already converted to database encoding.
+	 *
+	 * In text mode, CopyReadLine parses this data sufficiently to locate line
+	 * boundaries, then transfers the data to line_buf. We guarantee that
+	 * there is a \0 at input_buf[input_buf_len] at all times.  (In binary
+	 * mode, input_buf is not used.)
+	 *
+	 * If encoding conversion is not required, input_buf is not a separate
+	 * buffer but points directly to raw_buf.  In that case, input_buf_len
+	 * tracks the number of bytes that have been verified as valid in the
+	 * database encoding, and raw_buf_len is the total number of bytes stored
+	 * in the buffer.
+	 */
+#define INPUT_BUF_SIZE 65536	/* we palloc INPUT_BUF_SIZE+1 bytes */
+	char	   *input_buf;
+	int			input_buf_index;	/* next byte to process */
+	int			input_buf_len;	/* total # of bytes stored */
+	bool		input_reached_eof;	/* true if we reached EOF */
+	bool		input_reached_error;	/* true if a conversion error happened */
+	/* Shorthand for number of unconsumed bytes available in input_buf */
+#define INPUT_BUF_BYTES(cstate) ((cstate)->input_buf_len - (cstate)->input_buf_index)
+
+	/*
+	 * raw_buf holds raw input data read from the data source (file or client
+	 * connection), not yet converted to the database encoding.  Like with
+	 * 'input_buf', we guarantee that there is a \0 at raw_buf[raw_buf_len].
+	 */
+#define RAW_BUF_SIZE 65536		/* we palloc RAW_BUF_SIZE+1 bytes */
+	char	   *raw_buf;
+	int			raw_buf_index;	/* next byte to process */
+	int			raw_buf_len;	/* total # of bytes stored */
+	bool		raw_reached_eof;	/* true if we reached EOF */
+
+	/* Shorthand for number of unconsumed bytes available in raw_buf */
+#define RAW_BUF_BYTES(cstate) ((cstate)->raw_buf_len - (cstate)->raw_buf_index)
+
+	uint64		bytes_processed;	/* number of bytes processed so far */
+} CopyFromStateData;
+
+extern void ReceiveCopyBegin(CopyFromState cstate);
+extern void ReceiveCopyBinaryHeader(CopyFromState cstate);
+
+#endif							/* COPYFROM_INTERNAL_H */
diff --git a/src/include/commands/createas.h b/src/include/commands/createas.h
new file mode 100644
index 0000000..ad5054d
--- /dev/null
+++ b/src/include/commands/createas.h
@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * createas.h
+ *	  prototypes for createas.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/createas.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef CREATEAS_H
+#define CREATEAS_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/params.h"
+#include "parser/parse_node.h"
+#include "tcop/dest.h"
+#include "utils/queryenvironment.h"
+
+
+extern ObjectAddress ExecCreateTableAs(ParseState *pstate, CreateTableAsStmt *stmt,
+									   ParamListInfo params, QueryEnvironment *queryEnv,
+									   QueryCompletion *qc);
+
+extern int	GetIntoRelEFlags(IntoClause *intoClause);
+
+extern DestReceiver *CreateIntoRelDestReceiver(IntoClause *intoClause);
+
+extern bool CreateTableAsRelExists(CreateTableAsStmt *ctas);
+
+#endif							/* CREATEAS_H */
diff --git a/src/include/commands/dbcommands.h b/src/include/commands/dbcommands.h
new file mode 100644
index 0000000..29b6206
--- /dev/null
+++ b/src/include/commands/dbcommands.h
@@ -0,0 +1,35 @@
+/*-------------------------------------------------------------------------
+ *
+ * dbcommands.h
+ *		Database management commands (create/drop database).
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/dbcommands.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DBCOMMANDS_H
+#define DBCOMMANDS_H
+
+#include "access/xlogreader.h"
+#include "catalog/objectaddress.h"
+#include "lib/stringinfo.h"
+#include "parser/parse_node.h"
+
+extern Oid	createdb(ParseState *pstate, const CreatedbStmt *stmt);
+extern void dropdb(const char *dbname, bool missing_ok, bool force);
+extern void DropDatabase(ParseState *pstate, DropdbStmt *stmt);
+extern ObjectAddress RenameDatabase(const char *oldname, const char *newname);
+extern Oid	AlterDatabase(ParseState *pstate, AlterDatabaseStmt *stmt, bool isTopLevel);
+extern Oid	AlterDatabaseSet(AlterDatabaseSetStmt *stmt);
+extern ObjectAddress AlterDatabaseOwner(const char *dbname, Oid newOwnerId);
+
+extern Oid	get_database_oid(const char *dbname, bool missing_ok);
+extern char *get_database_name(Oid dbid);
+
+extern void check_encoding_locale_matches(int encoding, const char *collate, const char *ctype);
+
+#endif							/* DBCOMMANDS_H */
diff --git a/src/include/commands/dbcommands_xlog.h b/src/include/commands/dbcommands_xlog.h
new file mode 100644
index 0000000..f5ed762
--- /dev/null
+++ b/src/include/commands/dbcommands_xlog.h
@@ -0,0 +1,45 @@
+/*-------------------------------------------------------------------------
+ *
+ * dbcommands_xlog.h
+ *		Database resource manager XLOG definitions (create/drop database).
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/dbcommands_xlog.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DBCOMMANDS_XLOG_H
+#define DBCOMMANDS_XLOG_H
+
+#include "access/xlogreader.h"
+#include "lib/stringinfo.h"
+
+/* record types */
+#define XLOG_DBASE_CREATE		0x00
+#define XLOG_DBASE_DROP			0x10
+
+typedef struct xl_dbase_create_rec
+{
+	/* Records copying of a single subdirectory incl. contents */
+	Oid			db_id;
+	Oid			tablespace_id;
+	Oid			src_db_id;
+	Oid			src_tablespace_id;
+} xl_dbase_create_rec;
+
+typedef struct xl_dbase_drop_rec
+{
+	Oid			db_id;
+	int			ntablespaces;	/* number of tablespace IDs */
+	Oid			tablespace_ids[FLEXIBLE_ARRAY_MEMBER];
+} xl_dbase_drop_rec;
+#define MinSizeOfDbaseDropRec offsetof(xl_dbase_drop_rec, tablespace_ids)
+
+extern void dbase_redo(XLogReaderState *rptr);
+extern void dbase_desc(StringInfo buf, XLogReaderState *rptr);
+extern const char *dbase_identify(uint8 info);
+
+#endif							/* DBCOMMANDS_XLOG_H */
diff --git a/src/include/commands/defrem.h b/src/include/commands/defrem.h
new file mode 100644
index 0000000..42bf1c7
--- /dev/null
+++ b/src/include/commands/defrem.h
@@ -0,0 +1,157 @@
+/*-------------------------------------------------------------------------
+ *
+ * defrem.h
+ *	  POSTGRES define and remove utility definitions.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/defrem.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DEFREM_H
+#define DEFREM_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/params.h"
+#include "parser/parse_node.h"
+#include "tcop/dest.h"
+#include "utils/array.h"
+
+/* commands/dropcmds.c */
+extern void RemoveObjects(DropStmt *stmt);
+
+/* commands/indexcmds.c */
+extern ObjectAddress DefineIndex(Oid relationId,
+								 IndexStmt *stmt,
+								 Oid indexRelationId,
+								 Oid parentIndexId,
+								 Oid parentConstraintId,
+								 bool is_alter_table,
+								 bool check_rights,
+								 bool check_not_in_use,
+								 bool skip_build,
+								 bool quiet);
+extern void ExecReindex(ParseState *pstate, ReindexStmt *stmt, bool isTopLevel);
+extern char *makeObjectName(const char *name1, const char *name2,
+							const char *label);
+extern char *ChooseRelationName(const char *name1, const char *name2,
+								const char *label, Oid namespaceid,
+								bool isconstraint);
+extern bool CheckIndexCompatible(Oid oldId,
+								 const char *accessMethodName,
+								 List *attributeList,
+								 List *exclusionOpNames);
+extern Oid	GetDefaultOpClass(Oid type_id, Oid am_id);
+extern Oid	ResolveOpClass(List *opclass, Oid attrType,
+						   const char *accessMethodName, Oid accessMethodId);
+
+/* commands/functioncmds.c */
+extern ObjectAddress CreateFunction(ParseState *pstate, CreateFunctionStmt *stmt);
+extern void RemoveFunctionById(Oid funcOid);
+extern ObjectAddress AlterFunction(ParseState *pstate, AlterFunctionStmt *stmt);
+extern ObjectAddress CreateCast(CreateCastStmt *stmt);
+extern ObjectAddress CreateTransform(CreateTransformStmt *stmt);
+extern void IsThereFunctionInNamespace(const char *proname, int pronargs,
+									   oidvector *proargtypes, Oid nspOid);
+extern void ExecuteDoStmt(DoStmt *stmt, bool atomic);
+extern void ExecuteCallStmt(CallStmt *stmt, ParamListInfo params, bool atomic, DestReceiver *dest);
+extern TupleDesc CallStmtResultDesc(CallStmt *stmt);
+extern Oid	get_transform_oid(Oid type_id, Oid lang_id, bool missing_ok);
+extern void interpret_function_parameter_list(ParseState *pstate,
+											  List *parameters,
+											  Oid languageOid,
+											  ObjectType objtype,
+											  oidvector **parameterTypes,
+											  List **parameterTypes_list,
+											  ArrayType **allParameterTypes,
+											  ArrayType **parameterModes,
+											  ArrayType **parameterNames,
+											  List **inParameterNames_list,
+											  List **parameterDefaults,
+											  Oid *variadicArgType,
+											  Oid *requiredResultType);
+
+/* commands/operatorcmds.c */
+extern ObjectAddress DefineOperator(List *names, List *parameters);
+extern void RemoveOperatorById(Oid operOid);
+extern ObjectAddress AlterOperator(AlterOperatorStmt *stmt);
+
+/* commands/statscmds.c */
+extern ObjectAddress CreateStatistics(CreateStatsStmt *stmt);
+extern ObjectAddress AlterStatistics(AlterStatsStmt *stmt);
+extern void RemoveStatisticsById(Oid statsOid);
+extern Oid	StatisticsGetRelation(Oid statId, bool missing_ok);
+
+/* commands/aggregatecmds.c */
+extern ObjectAddress DefineAggregate(ParseState *pstate, List *name, List *args, bool oldstyle,
+									 List *parameters, bool replace);
+
+/* commands/opclasscmds.c */
+extern ObjectAddress DefineOpClass(CreateOpClassStmt *stmt);
+extern ObjectAddress DefineOpFamily(CreateOpFamilyStmt *stmt);
+extern Oid	AlterOpFamily(AlterOpFamilyStmt *stmt);
+extern void IsThereOpClassInNamespace(const char *opcname, Oid opcmethod,
+									  Oid opcnamespace);
+extern void IsThereOpFamilyInNamespace(const char *opfname, Oid opfmethod,
+									   Oid opfnamespace);
+extern Oid	get_opclass_oid(Oid amID, List *opclassname, bool missing_ok);
+extern Oid	get_opfamily_oid(Oid amID, List *opfamilyname, bool missing_ok);
+
+/* commands/tsearchcmds.c */
+extern ObjectAddress DefineTSParser(List *names, List *parameters);
+
+extern ObjectAddress DefineTSDictionary(List *names, List *parameters);
+extern ObjectAddress AlterTSDictionary(AlterTSDictionaryStmt *stmt);
+
+extern ObjectAddress DefineTSTemplate(List *names, List *parameters);
+
+extern ObjectAddress DefineTSConfiguration(List *names, List *parameters,
+										   ObjectAddress *copied);
+extern void RemoveTSConfigurationById(Oid cfgId);
+extern ObjectAddress AlterTSConfiguration(AlterTSConfigurationStmt *stmt);
+
+extern text *serialize_deflist(List *deflist);
+extern List *deserialize_deflist(Datum txt);
+
+/* commands/foreigncmds.c */
+extern ObjectAddress AlterForeignServerOwner(const char *name, Oid newOwnerId);
+extern void AlterForeignServerOwner_oid(Oid, Oid newOwnerId);
+extern ObjectAddress AlterForeignDataWrapperOwner(const char *name, Oid newOwnerId);
+extern void AlterForeignDataWrapperOwner_oid(Oid fwdId, Oid newOwnerId);
+extern ObjectAddress CreateForeignDataWrapper(CreateFdwStmt *stmt);
+extern ObjectAddress AlterForeignDataWrapper(AlterFdwStmt *stmt);
+extern ObjectAddress CreateForeignServer(CreateForeignServerStmt *stmt);
+extern ObjectAddress AlterForeignServer(AlterForeignServerStmt *stmt);
+extern ObjectAddress CreateUserMapping(CreateUserMappingStmt *stmt);
+extern ObjectAddress AlterUserMapping(AlterUserMappingStmt *stmt);
+extern Oid	RemoveUserMapping(DropUserMappingStmt *stmt);
+extern void CreateForeignTable(CreateForeignTableStmt *stmt, Oid relid);
+extern void ImportForeignSchema(ImportForeignSchemaStmt *stmt);
+extern Datum transformGenericOptions(Oid catalogId,
+									 Datum oldOptions,
+									 List *options,
+									 Oid fdwvalidator);
+
+/* commands/amcmds.c */
+extern ObjectAddress CreateAccessMethod(CreateAmStmt *stmt);
+extern Oid	get_index_am_oid(const char *amname, bool missing_ok);
+extern Oid	get_table_am_oid(const char *amname, bool missing_ok);
+extern Oid	get_am_oid(const char *amname, bool missing_ok);
+extern char *get_am_name(Oid amOid);
+
+/* support routines in commands/define.c */
+
+extern char *defGetString(DefElem *def);
+extern double defGetNumeric(DefElem *def);
+extern bool defGetBoolean(DefElem *def);
+extern int32 defGetInt32(DefElem *def);
+extern int64 defGetInt64(DefElem *def);
+extern List *defGetQualifiedName(DefElem *def);
+extern TypeName *defGetTypeName(DefElem *def);
+extern int	defGetTypeLength(DefElem *def);
+extern List *defGetStringList(DefElem *def);
+
+#endif							/* DEFREM_H */
diff --git a/src/include/commands/discard.h b/src/include/commands/discard.h
new file mode 100644
index 0000000..54b9dbb
--- /dev/null
+++ b/src/include/commands/discard.h
@@ -0,0 +1,20 @@
+/*-------------------------------------------------------------------------
+ *
+ * discard.h
+ *	  prototypes for discard.c.
+ *
+ *
+ * Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ *
+ * src/include/commands/discard.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DISCARD_H
+#define DISCARD_H
+
+#include "nodes/parsenodes.h"
+
+extern void DiscardCommand(DiscardStmt *stmt, bool isTopLevel);
+
+#endif							/* DISCARD_H */
diff --git a/src/include/commands/event_trigger.h b/src/include/commands/event_trigger.h
new file mode 100644
index 0000000..c11bf2d
--- /dev/null
+++ b/src/include/commands/event_trigger.h
@@ -0,0 +1,87 @@
+/*-------------------------------------------------------------------------
+ *
+ * event_trigger.h
+ *	  Declarations for command trigger handling.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/event_trigger.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef EVENT_TRIGGER_H
+#define EVENT_TRIGGER_H
+
+#include "catalog/dependency.h"
+#include "catalog/objectaddress.h"
+#include "catalog/pg_event_trigger.h"
+#include "nodes/parsenodes.h"
+#include "tcop/cmdtag.h"
+#include "tcop/deparse_utility.h"
+#include "utils/aclchk_internal.h"
+
+typedef struct EventTriggerData
+{
+	NodeTag		type;
+	const char *event;			/* event name */
+	Node	   *parsetree;		/* parse tree */
+	CommandTag	tag;
+} EventTriggerData;
+
+#define AT_REWRITE_ALTER_PERSISTENCE	0x01
+#define AT_REWRITE_DEFAULT_VAL			0x02
+#define AT_REWRITE_COLUMN_REWRITE		0x04
+
+/*
+ * EventTriggerData is the node type that is passed as fmgr "context" info
+ * when a function is called by the event trigger manager.
+ */
+#define CALLED_AS_EVENT_TRIGGER(fcinfo) \
+	((fcinfo)->context != NULL && IsA((fcinfo)->context, EventTriggerData))
+
+extern Oid	CreateEventTrigger(CreateEventTrigStmt *stmt);
+extern Oid	get_event_trigger_oid(const char *trigname, bool missing_ok);
+
+extern Oid	AlterEventTrigger(AlterEventTrigStmt *stmt);
+extern ObjectAddress AlterEventTriggerOwner(const char *name, Oid newOwnerId);
+extern void AlterEventTriggerOwner_oid(Oid, Oid newOwnerId);
+
+extern bool EventTriggerSupportsObjectType(ObjectType obtype);
+extern bool EventTriggerSupportsObjectClass(ObjectClass objclass);
+extern void EventTriggerDDLCommandStart(Node *parsetree);
+extern void EventTriggerDDLCommandEnd(Node *parsetree);
+extern void EventTriggerSQLDrop(Node *parsetree);
+extern void EventTriggerTableRewrite(Node *parsetree, Oid tableOid, int reason);
+
+extern bool EventTriggerBeginCompleteQuery(void);
+extern void EventTriggerEndCompleteQuery(void);
+extern bool trackDroppedObjectsNeeded(void);
+extern void EventTriggerSQLDropAddObject(const ObjectAddress *object,
+										 bool original, bool normal);
+
+extern void EventTriggerInhibitCommandCollection(void);
+extern void EventTriggerUndoInhibitCommandCollection(void);
+
+extern void EventTriggerCollectSimpleCommand(ObjectAddress address,
+											 ObjectAddress secondaryObject,
+											 Node *parsetree);
+
+extern void EventTriggerAlterTableStart(Node *parsetree);
+extern void EventTriggerAlterTableRelid(Oid objectId);
+extern void EventTriggerCollectAlterTableSubcmd(Node *subcmd,
+												ObjectAddress address);
+extern void EventTriggerAlterTableEnd(void);
+
+extern void EventTriggerCollectGrant(InternalGrant *istmt);
+extern void EventTriggerCollectAlterOpFam(AlterOpFamilyStmt *stmt,
+										  Oid opfamoid, List *operators,
+										  List *procedures);
+extern void EventTriggerCollectCreateOpClass(CreateOpClassStmt *stmt,
+											 Oid opcoid, List *operators,
+											 List *procedures);
+extern void EventTriggerCollectAlterTSConfig(AlterTSConfigurationStmt *stmt,
+											 Oid cfgId, Oid *dictIds, int ndicts);
+extern void EventTriggerCollectAlterDefPrivs(AlterDefaultPrivilegesStmt *stmt);
+
+#endif							/* EVENT_TRIGGER_H */
diff --git a/src/include/commands/explain.h b/src/include/commands/explain.h
new file mode 100644
index 0000000..e94d9e4
--- /dev/null
+++ b/src/include/commands/explain.h
@@ -0,0 +1,127 @@
+/*-------------------------------------------------------------------------
+ *
+ * explain.h
+ *	  prototypes for explain.c
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994-5, Regents of the University of California
+ *
+ * src/include/commands/explain.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef EXPLAIN_H
+#define EXPLAIN_H
+
+#include "executor/executor.h"
+#include "lib/stringinfo.h"
+#include "parser/parse_node.h"
+
+typedef enum ExplainFormat
+{
+	EXPLAIN_FORMAT_TEXT,
+	EXPLAIN_FORMAT_XML,
+	EXPLAIN_FORMAT_JSON,
+	EXPLAIN_FORMAT_YAML
+} ExplainFormat;
+
+typedef struct ExplainWorkersState
+{
+	int			num_workers;	/* # of worker processes the plan used */
+	bool	   *worker_inited;	/* per-worker state-initialized flags */
+	StringInfoData *worker_str; /* per-worker transient output buffers */
+	int		   *worker_state_save;	/* per-worker grouping state save areas */
+	StringInfo	prev_str;		/* saved output buffer while redirecting */
+} ExplainWorkersState;
+
+typedef struct ExplainState
+{
+	StringInfo	str;			/* output buffer */
+	/* options */
+	bool		verbose;		/* be verbose */
+	bool		analyze;		/* print actual times */
+	bool		costs;			/* print estimated costs */
+	bool		buffers;		/* print buffer usage */
+	bool		wal;			/* print WAL usage */
+	bool		timing;			/* print detailed node timing */
+	bool		summary;		/* print total planning and execution timing */
+	bool		settings;		/* print modified settings */
+	ExplainFormat format;		/* output format */
+	/* state for output formatting --- not reset for each new plan tree */
+	int			indent;			/* current indentation level */
+	List	   *grouping_stack; /* format-specific grouping state */
+	/* state related to the current plan tree (filled by ExplainPrintPlan) */
+	PlannedStmt *pstmt;			/* top of plan */
+	List	   *rtable;			/* range table */
+	List	   *rtable_names;	/* alias names for RTEs */
+	List	   *deparse_cxt;	/* context list for deparsing expressions */
+	Bitmapset  *printed_subplans;	/* ids of SubPlans we've printed */
+	bool		hide_workers;	/* set if we find an invisible Gather */
+	/* state related to the current plan node */
+	ExplainWorkersState *workers_state; /* needed if parallel plan */
+} ExplainState;
+
+/* Hook for plugins to get control in ExplainOneQuery() */
+typedef void (*ExplainOneQuery_hook_type) (Query *query,
+										   int cursorOptions,
+										   IntoClause *into,
+										   ExplainState *es,
+										   const char *queryString,
+										   ParamListInfo params,
+										   QueryEnvironment *queryEnv);
+extern PGDLLIMPORT ExplainOneQuery_hook_type ExplainOneQuery_hook;
+
+/* Hook for plugins to get control in explain_get_index_name() */
+typedef const char *(*explain_get_index_name_hook_type) (Oid indexId);
+extern PGDLLIMPORT explain_get_index_name_hook_type explain_get_index_name_hook;
+
+
+extern void ExplainQuery(ParseState *pstate, ExplainStmt *stmt,
+						 ParamListInfo params, DestReceiver *dest);
+
+extern ExplainState *NewExplainState(void);
+
+extern TupleDesc ExplainResultDesc(ExplainStmt *stmt);
+
+extern void ExplainOneUtility(Node *utilityStmt, IntoClause *into,
+							  ExplainState *es, const char *queryString,
+							  ParamListInfo params, QueryEnvironment *queryEnv);
+
+extern void ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into,
+						   ExplainState *es, const char *queryString,
+						   ParamListInfo params, QueryEnvironment *queryEnv,
+						   const instr_time *planduration,
+						   const BufferUsage *bufusage);
+
+extern void ExplainPrintPlan(ExplainState *es, QueryDesc *queryDesc);
+extern void ExplainPrintTriggers(ExplainState *es, QueryDesc *queryDesc);
+
+extern void ExplainPrintJITSummary(ExplainState *es, QueryDesc *queryDesc);
+
+extern void ExplainQueryText(ExplainState *es, QueryDesc *queryDesc);
+
+extern void ExplainBeginOutput(ExplainState *es);
+extern void ExplainEndOutput(ExplainState *es);
+extern void ExplainSeparatePlans(ExplainState *es);
+
+extern void ExplainPropertyList(const char *qlabel, List *data,
+								ExplainState *es);
+extern void ExplainPropertyListNested(const char *qlabel, List *data,
+									  ExplainState *es);
+extern void ExplainPropertyText(const char *qlabel, const char *value,
+								ExplainState *es);
+extern void ExplainPropertyInteger(const char *qlabel, const char *unit,
+								   int64 value, ExplainState *es);
+extern void ExplainPropertyUInteger(const char *qlabel, const char *unit,
+									uint64 value, ExplainState *es);
+extern void ExplainPropertyFloat(const char *qlabel, const char *unit,
+								 double value, int ndigits, ExplainState *es);
+extern void ExplainPropertyBool(const char *qlabel, bool value,
+								ExplainState *es);
+
+extern void ExplainOpenGroup(const char *objtype, const char *labelname,
+							 bool labeled, ExplainState *es);
+extern void ExplainCloseGroup(const char *objtype, const char *labelname,
+							  bool labeled, ExplainState *es);
+
+#endif							/* EXPLAIN_H */
diff --git a/src/include/commands/extension.h b/src/include/commands/extension.h
new file mode 100644
index 0000000..24dbf86
--- /dev/null
+++ b/src/include/commands/extension.h
@@ -0,0 +1,55 @@
+/*-------------------------------------------------------------------------
+ *
+ * extension.h
+ *		Extension management commands (create/drop extension).
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/extension.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef EXTENSION_H
+#define EXTENSION_H
+
+#include "catalog/objectaddress.h"
+#include "parser/parse_node.h"
+
+
+/*
+ * creating_extension is only true while running a CREATE EXTENSION or ALTER
+ * EXTENSION UPDATE command.  It instructs recordDependencyOnCurrentExtension()
+ * to register a dependency on the current pg_extension object for each SQL
+ * object created by an extension script.  It also instructs performDeletion()
+ * to remove such dependencies without following them, so that extension
+ * scripts can drop member objects without having to explicitly dissociate
+ * them from the extension first.
+ */
+extern PGDLLIMPORT bool creating_extension;
+extern PGDLLIMPORT Oid CurrentExtensionObject;
+
+
+extern ObjectAddress CreateExtension(ParseState *pstate, CreateExtensionStmt *stmt);
+
+extern void RemoveExtensionById(Oid extId);
+
+extern ObjectAddress InsertExtensionTuple(const char *extName, Oid extOwner,
+										  Oid schemaOid, bool relocatable, const char *extVersion,
+										  Datum extConfig, Datum extCondition,
+										  List *requiredExtensions);
+
+extern ObjectAddress ExecAlterExtensionStmt(ParseState *pstate, AlterExtensionStmt *stmt);
+
+extern ObjectAddress ExecAlterExtensionContentsStmt(AlterExtensionContentsStmt *stmt,
+													ObjectAddress *objAddr);
+
+extern Oid	get_extension_oid(const char *extname, bool missing_ok);
+extern char *get_extension_name(Oid ext_oid);
+extern bool extension_file_exists(const char *extensionName);
+
+extern ObjectAddress AlterExtensionNamespace(const char *extensionName, const char *newschema,
+											 Oid *oldschema);
+
+#endif							/* EXTENSION_H */
diff --git a/src/include/commands/lockcmds.h b/src/include/commands/lockcmds.h
new file mode 100644
index 0000000..c005dee
--- /dev/null
+++ b/src/include/commands/lockcmds.h
@@ -0,0 +1,24 @@
+/*-------------------------------------------------------------------------
+ *
+ * lockcmds.h
+ *	  prototypes for lockcmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/lockcmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef LOCKCMDS_H
+#define LOCKCMDS_H
+
+#include "nodes/parsenodes.h"
+
+/*
+ * LOCK
+ */
+extern void LockTableCommand(LockStmt *lockstmt);
+
+#endif							/* LOCKCMDS_H */
diff --git a/src/include/commands/matview.h b/src/include/commands/matview.h
new file mode 100644
index 0000000..214b1c1
--- /dev/null
+++ b/src/include/commands/matview.h
@@ -0,0 +1,33 @@
+/*-------------------------------------------------------------------------
+ *
+ * matview.h
+ *	  prototypes for matview.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/matview.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef MATVIEW_H
+#define MATVIEW_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/params.h"
+#include "nodes/parsenodes.h"
+#include "tcop/dest.h"
+#include "utils/relcache.h"
+
+
+extern void SetMatViewPopulatedState(Relation relation, bool newstate);
+
+extern ObjectAddress ExecRefreshMatView(RefreshMatViewStmt *stmt, const char *queryString,
+										ParamListInfo params, QueryCompletion *qc);
+
+extern DestReceiver *CreateTransientRelDestReceiver(Oid oid);
+
+extern bool MatViewIncrementalMaintenanceIsEnabled(void);
+
+#endif							/* MATVIEW_H */
diff --git a/src/include/commands/policy.h b/src/include/commands/policy.h
new file mode 100644
index 0000000..116af68
--- /dev/null
+++ b/src/include/commands/policy.h
@@ -0,0 +1,38 @@
+/*-------------------------------------------------------------------------
+ *
+ * policy.h
+ *	  prototypes for policy.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/policy.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef POLICY_H
+#define POLICY_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+#include "utils/relcache.h"
+
+extern void RelationBuildRowSecurity(Relation relation);
+
+extern void RemovePolicyById(Oid policy_id);
+
+extern bool RemoveRoleFromObjectPolicy(Oid roleid, Oid classid, Oid objid);
+
+extern ObjectAddress CreatePolicy(CreatePolicyStmt *stmt);
+extern ObjectAddress AlterPolicy(AlterPolicyStmt *stmt);
+
+extern Oid	get_relation_policy_oid(Oid relid, const char *policy_name,
+									bool missing_ok);
+
+extern ObjectAddress rename_policy(RenameStmt *stmt);
+
+extern bool relation_has_policies(Relation rel);
+
+#endif							/* POLICY_H */
diff --git a/src/include/commands/portalcmds.h b/src/include/commands/portalcmds.h
new file mode 100644
index 0000000..5d5e766
--- /dev/null
+++ b/src/include/commands/portalcmds.h
@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * portalcmds.h
+ *	  prototypes for portalcmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/portalcmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PORTALCMDS_H
+#define PORTALCMDS_H
+
+#include "nodes/parsenodes.h"
+#include "parser/parse_node.h"
+#include "utils/portal.h"
+
+
+extern void PerformCursorOpen(ParseState *pstate, DeclareCursorStmt *cstmt, ParamListInfo params,
+							  bool isTopLevel);
+
+extern void PerformPortalFetch(FetchStmt *stmt, DestReceiver *dest,
+							   QueryCompletion *qc);
+
+extern void PerformPortalClose(const char *name);
+
+extern void PortalCleanup(Portal portal);
+
+extern void PersistHoldablePortal(Portal portal);
+
+#endif							/* PORTALCMDS_H */
diff --git a/src/include/commands/prepare.h b/src/include/commands/prepare.h
new file mode 100644
index 0000000..9352581
--- /dev/null
+++ b/src/include/commands/prepare.h
@@ -0,0 +1,61 @@
+/*-------------------------------------------------------------------------
+ *
+ * prepare.h
+ *	  PREPARE, EXECUTE and DEALLOCATE commands, and prepared-stmt storage
+ *
+ *
+ * Copyright (c) 2002-2021, PostgreSQL Global Development Group
+ *
+ * src/include/commands/prepare.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PREPARE_H
+#define PREPARE_H
+
+#include "commands/explain.h"
+#include "datatype/timestamp.h"
+#include "utils/plancache.h"
+
+/*
+ * The data structure representing a prepared statement.  This is now just
+ * a thin veneer over a plancache entry --- the main addition is that of
+ * a name.
+ *
+ * Note: all subsidiary storage lives in the referenced plancache entry.
+ */
+typedef struct
+{
+	/* dynahash.c requires key to be first field */
+	char		stmt_name[NAMEDATALEN];
+	CachedPlanSource *plansource;	/* the actual cached plan */
+	bool		from_sql;		/* prepared via SQL, not FE/BE protocol? */
+	TimestampTz prepare_time;	/* the time when the stmt was prepared */
+} PreparedStatement;
+
+
+/* Utility statements PREPARE, EXECUTE, DEALLOCATE, EXPLAIN EXECUTE */
+extern void PrepareQuery(ParseState *pstate, PrepareStmt *stmt,
+						 int stmt_location, int stmt_len);
+extern void ExecuteQuery(ParseState *pstate,
+						 ExecuteStmt *stmt, IntoClause *intoClause,
+						 ParamListInfo params,
+						 DestReceiver *dest, QueryCompletion *qc);
+extern void DeallocateQuery(DeallocateStmt *stmt);
+extern void ExplainExecuteQuery(ExecuteStmt *execstmt, IntoClause *into,
+								ExplainState *es, const char *queryString,
+								ParamListInfo params, QueryEnvironment *queryEnv);
+
+/* Low-level access to stored prepared statements */
+extern void StorePreparedStatement(const char *stmt_name,
+								   CachedPlanSource *plansource,
+								   bool from_sql);
+extern PreparedStatement *FetchPreparedStatement(const char *stmt_name,
+												 bool throwError);
+extern void DropPreparedStatement(const char *stmt_name, bool showError);
+extern TupleDesc FetchPreparedStatementResultDesc(PreparedStatement *stmt);
+extern List *FetchPreparedStatementTargetList(PreparedStatement *stmt);
+
+extern void DropAllPreparedStatements(void);
+
+#endif							/* PREPARE_H */
diff --git a/src/include/commands/proclang.h b/src/include/commands/proclang.h
new file mode 100644
index 0000000..16e857f
--- /dev/null
+++ b/src/include/commands/proclang.h
@@ -0,0 +1,23 @@
+/*-------------------------------------------------------------------------
+ *
+ * proclang.h
+ *	  prototypes for proclang.c.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/proclang.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PROCLANG_H
+#define PROCLANG_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+extern ObjectAddress CreateProceduralLanguage(CreatePLangStmt *stmt);
+
+extern Oid	get_language_oid(const char *langname, bool missing_ok);
+
+#endif							/* PROCLANG_H */
diff --git a/src/include/commands/progress.h b/src/include/commands/progress.h
new file mode 100644
index 0000000..d7bf163
--- /dev/null
+++ b/src/include/commands/progress.h
@@ -0,0 +1,154 @@
+/*-------------------------------------------------------------------------
+ *
+ * progress.h
+ *	  Constants used with the progress reporting facilities defined in
+ *	  backend_status.h.  These are possibly interesting to extensions, so we
+ *	  expose them via this header file.  Note that if you update these
+ *	  constants, you probably also need to update the views based on them
+ *	  in system_views.sql.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/progress.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PROGRESS_H
+#define PROGRESS_H
+
+/* Progress parameters for (lazy) vacuum */
+#define PROGRESS_VACUUM_PHASE					0
+#define PROGRESS_VACUUM_TOTAL_HEAP_BLKS			1
+#define PROGRESS_VACUUM_HEAP_BLKS_SCANNED		2
+#define PROGRESS_VACUUM_HEAP_BLKS_VACUUMED		3
+#define PROGRESS_VACUUM_NUM_INDEX_VACUUMS		4
+#define PROGRESS_VACUUM_MAX_DEAD_TUPLES			5
+#define PROGRESS_VACUUM_NUM_DEAD_TUPLES			6
+
+/* Phases of vacuum (as advertised via PROGRESS_VACUUM_PHASE) */
+#define PROGRESS_VACUUM_PHASE_SCAN_HEAP			1
+#define PROGRESS_VACUUM_PHASE_VACUUM_INDEX		2
+#define PROGRESS_VACUUM_PHASE_VACUUM_HEAP		3
+#define PROGRESS_VACUUM_PHASE_INDEX_CLEANUP		4
+#define PROGRESS_VACUUM_PHASE_TRUNCATE			5
+#define PROGRESS_VACUUM_PHASE_FINAL_CLEANUP		6
+
+/* Progress parameters for analyze */
+#define PROGRESS_ANALYZE_PHASE						0
+#define PROGRESS_ANALYZE_BLOCKS_TOTAL				1
+#define PROGRESS_ANALYZE_BLOCKS_DONE				2
+#define PROGRESS_ANALYZE_EXT_STATS_TOTAL			3
+#define PROGRESS_ANALYZE_EXT_STATS_COMPUTED			4
+#define PROGRESS_ANALYZE_CHILD_TABLES_TOTAL			5
+#define PROGRESS_ANALYZE_CHILD_TABLES_DONE			6
+#define PROGRESS_ANALYZE_CURRENT_CHILD_TABLE_RELID	7
+
+/* Phases of analyze (as advertised via PROGRESS_ANALYZE_PHASE) */
+#define PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS		1
+#define PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS_INH	2
+#define PROGRESS_ANALYZE_PHASE_COMPUTE_STATS			3
+#define PROGRESS_ANALYZE_PHASE_COMPUTE_EXT_STATS		4
+#define PROGRESS_ANALYZE_PHASE_FINALIZE_ANALYZE			5
+
+/* Progress parameters for cluster */
+#define PROGRESS_CLUSTER_COMMAND				0
+#define PROGRESS_CLUSTER_PHASE					1
+#define PROGRESS_CLUSTER_INDEX_RELID			2
+#define PROGRESS_CLUSTER_HEAP_TUPLES_SCANNED	3
+#define PROGRESS_CLUSTER_HEAP_TUPLES_WRITTEN	4
+#define PROGRESS_CLUSTER_TOTAL_HEAP_BLKS		5
+#define PROGRESS_CLUSTER_HEAP_BLKS_SCANNED		6
+#define PROGRESS_CLUSTER_INDEX_REBUILD_COUNT	7
+
+/* Phases of cluster (as advertised via PROGRESS_CLUSTER_PHASE) */
+#define PROGRESS_CLUSTER_PHASE_SEQ_SCAN_HEAP	1
+#define PROGRESS_CLUSTER_PHASE_INDEX_SCAN_HEAP	2
+#define PROGRESS_CLUSTER_PHASE_SORT_TUPLES		3
+#define PROGRESS_CLUSTER_PHASE_WRITE_NEW_HEAP	4
+#define PROGRESS_CLUSTER_PHASE_SWAP_REL_FILES	5
+#define PROGRESS_CLUSTER_PHASE_REBUILD_INDEX	6
+#define PROGRESS_CLUSTER_PHASE_FINAL_CLEANUP	7
+
+/* Commands of PROGRESS_CLUSTER */
+#define PROGRESS_CLUSTER_COMMAND_CLUSTER		1
+#define PROGRESS_CLUSTER_COMMAND_VACUUM_FULL	2
+
+/* Progress parameters for CREATE INDEX */
+/* 3, 4 and 5 reserved for "waitfor" metrics */
+#define PROGRESS_CREATEIDX_COMMAND				0
+#define PROGRESS_CREATEIDX_INDEX_OID			6
+#define PROGRESS_CREATEIDX_ACCESS_METHOD_OID	8
+#define PROGRESS_CREATEIDX_PHASE				9	/* AM-agnostic phase # */
+#define PROGRESS_CREATEIDX_SUBPHASE				10	/* phase # filled by AM */
+#define PROGRESS_CREATEIDX_TUPLES_TOTAL			11
+#define PROGRESS_CREATEIDX_TUPLES_DONE			12
+#define PROGRESS_CREATEIDX_PARTITIONS_TOTAL		13
+#define PROGRESS_CREATEIDX_PARTITIONS_DONE		14
+/* 15 and 16 reserved for "block number" metrics */
+
+/* Phases of CREATE INDEX (as advertised via PROGRESS_CREATEIDX_PHASE) */
+#define PROGRESS_CREATEIDX_PHASE_WAIT_1			1
+#define PROGRESS_CREATEIDX_PHASE_BUILD			2
+#define PROGRESS_CREATEIDX_PHASE_WAIT_2			3
+#define PROGRESS_CREATEIDX_PHASE_VALIDATE_IDXSCAN	4
+#define PROGRESS_CREATEIDX_PHASE_VALIDATE_SORT		5
+#define PROGRESS_CREATEIDX_PHASE_VALIDATE_TABLESCAN	6
+#define PROGRESS_CREATEIDX_PHASE_WAIT_3			7
+#define PROGRESS_CREATEIDX_PHASE_WAIT_4			8
+#define PROGRESS_CREATEIDX_PHASE_WAIT_5			9
+
+/*
+ * Subphases of CREATE INDEX, for index_build.
+ */
+#define PROGRESS_CREATEIDX_SUBPHASE_INITIALIZE	1
+/* Additional phases are defined by each AM */
+
+/* Commands of PROGRESS_CREATEIDX */
+#define PROGRESS_CREATEIDX_COMMAND_CREATE			1
+#define PROGRESS_CREATEIDX_COMMAND_CREATE_CONCURRENTLY	2
+#define PROGRESS_CREATEIDX_COMMAND_REINDEX		3
+#define PROGRESS_CREATEIDX_COMMAND_REINDEX_CONCURRENTLY	4
+
+/* Lock holder wait counts */
+#define PROGRESS_WAITFOR_TOTAL					3
+#define PROGRESS_WAITFOR_DONE					4
+#define PROGRESS_WAITFOR_CURRENT_PID			5
+
+/* Block numbers in a generic relation scan */
+#define PROGRESS_SCAN_BLOCKS_TOTAL				15
+#define PROGRESS_SCAN_BLOCKS_DONE				16
+
+/* Progress parameters for pg_basebackup */
+#define PROGRESS_BASEBACKUP_PHASE				0
+#define PROGRESS_BASEBACKUP_BACKUP_TOTAL			1
+#define PROGRESS_BASEBACKUP_BACKUP_STREAMED			2
+#define PROGRESS_BASEBACKUP_TBLSPC_TOTAL			3
+#define PROGRESS_BASEBACKUP_TBLSPC_STREAMED			4
+
+/* Phases of pg_basebackup (as advertised via PROGRESS_BASEBACKUP_PHASE) */
+#define PROGRESS_BASEBACKUP_PHASE_WAIT_CHECKPOINT		1
+#define PROGRESS_BASEBACKUP_PHASE_ESTIMATE_BACKUP_SIZE		2
+#define PROGRESS_BASEBACKUP_PHASE_STREAM_BACKUP			3
+#define PROGRESS_BASEBACKUP_PHASE_WAIT_WAL_ARCHIVE		4
+#define PROGRESS_BASEBACKUP_PHASE_TRANSFER_WAL			5
+
+/* Progress parameters for PROGRESS_COPY */
+#define PROGRESS_COPY_BYTES_PROCESSED 0
+#define PROGRESS_COPY_BYTES_TOTAL 1
+#define PROGRESS_COPY_TUPLES_PROCESSED 2
+#define PROGRESS_COPY_TUPLES_EXCLUDED 3
+#define PROGRESS_COPY_COMMAND 4
+#define PROGRESS_COPY_TYPE 5
+
+/* Commands of COPY (as advertised via PROGRESS_COPY_COMMAND) */
+#define PROGRESS_COPY_COMMAND_FROM 1
+#define PROGRESS_COPY_COMMAND_TO 2
+
+/* Types of COPY commands (as advertised via PROGRESS_COPY_TYPE) */
+#define PROGRESS_COPY_TYPE_FILE 1
+#define PROGRESS_COPY_TYPE_PROGRAM 2
+#define PROGRESS_COPY_TYPE_PIPE 3
+#define PROGRESS_COPY_TYPE_CALLBACK 4
+
+#endif
diff --git a/src/include/commands/publicationcmds.h b/src/include/commands/publicationcmds.h
new file mode 100644
index 0000000..5432dda
--- /dev/null
+++ b/src/include/commands/publicationcmds.h
@@ -0,0 +1,34 @@
+/*-------------------------------------------------------------------------
+ *
+ * publicationcmds.h
+ *	  prototypes for publicationcmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/publicationcmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef PUBLICATIONCMDS_H
+#define PUBLICATIONCMDS_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+#include "utils/inval.h"
+
+/* Same as MAXNUMMESSAGES in sinvaladt.c */
+#define MAX_RELCACHE_INVAL_MSGS 4096
+
+extern ObjectAddress CreatePublication(CreatePublicationStmt *stmt);
+extern void AlterPublication(AlterPublicationStmt *stmt);
+extern void RemovePublicationById(Oid pubid);
+extern void RemovePublicationRelById(Oid proid);
+
+extern ObjectAddress AlterPublicationOwner(const char *name, Oid newOwnerId);
+extern void AlterPublicationOwner_oid(Oid pubid, Oid newOwnerId);
+extern void InvalidatePublicationRels(List *relids);
+
+#endif							/* PUBLICATIONCMDS_H */
diff --git a/src/include/commands/schemacmds.h b/src/include/commands/schemacmds.h
new file mode 100644
index 0000000..25f4876
--- /dev/null
+++ b/src/include/commands/schemacmds.h
@@ -0,0 +1,29 @@
+/*-------------------------------------------------------------------------
+ *
+ * schemacmds.h
+ *	  prototypes for schemacmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/schemacmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef SCHEMACMDS_H
+#define SCHEMACMDS_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+extern Oid	CreateSchemaCommand(CreateSchemaStmt *parsetree,
+								const char *queryString,
+								int stmt_location, int stmt_len);
+
+extern ObjectAddress RenameSchema(const char *oldname, const char *newname);
+extern ObjectAddress AlterSchemaOwner(const char *name, Oid newOwnerId);
+extern void AlterSchemaOwner_oid(Oid schemaOid, Oid newOwnerId);
+
+#endif							/* SCHEMACMDS_H */
diff --git a/src/include/commands/seclabel.h b/src/include/commands/seclabel.h
new file mode 100644
index 0000000..40e284e
--- /dev/null
+++ b/src/include/commands/seclabel.h
@@ -0,0 +1,34 @@
+/*
+ * seclabel.h
+ *
+ * Prototypes for functions in commands/seclabel.c
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ */
+#ifndef SECLABEL_H
+#define SECLABEL_H
+
+#include "catalog/objectaddress.h"
+
+/*
+ * Internal APIs
+ */
+extern char *GetSecurityLabel(const ObjectAddress *object,
+							  const char *provider);
+extern void SetSecurityLabel(const ObjectAddress *object,
+							 const char *provider, const char *label);
+extern void DeleteSecurityLabel(const ObjectAddress *object);
+extern void DeleteSharedSecurityLabel(Oid objectId, Oid classId);
+
+/*
+ * Statement and ESP hook support
+ */
+extern ObjectAddress ExecSecLabelStmt(SecLabelStmt *stmt);
+
+typedef void (*check_object_relabel_type) (const ObjectAddress *object,
+										   const char *seclabel);
+extern void register_label_provider(const char *provider,
+									check_object_relabel_type hook);
+
+#endif							/* SECLABEL_H */
diff --git a/src/include/commands/sequence.h b/src/include/commands/sequence.h
new file mode 100644
index 0000000..40544dd
--- /dev/null
+++ b/src/include/commands/sequence.h
@@ -0,0 +1,69 @@
+/*-------------------------------------------------------------------------
+ *
+ * sequence.h
+ *	  prototypes for sequence.c.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/sequence.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef SEQUENCE_H
+#define SEQUENCE_H
+
+#include "access/xlogreader.h"
+#include "catalog/objectaddress.h"
+#include "fmgr.h"
+#include "lib/stringinfo.h"
+#include "nodes/parsenodes.h"
+#include "parser/parse_node.h"
+#include "storage/relfilenode.h"
+
+
+typedef struct FormData_pg_sequence_data
+{
+	int64		last_value;
+	int64		log_cnt;
+	bool		is_called;
+} FormData_pg_sequence_data;
+
+typedef FormData_pg_sequence_data *Form_pg_sequence_data;
+
+/*
+ * Columns of a sequence relation
+ */
+
+#define SEQ_COL_LASTVAL			1
+#define SEQ_COL_LOG				2
+#define SEQ_COL_CALLED			3
+
+#define SEQ_COL_FIRSTCOL		SEQ_COL_LASTVAL
+#define SEQ_COL_LASTCOL			SEQ_COL_CALLED
+
+/* XLOG stuff */
+#define XLOG_SEQ_LOG			0x00
+
+typedef struct xl_seq_rec
+{
+	RelFileNode node;
+	/* SEQUENCE TUPLE DATA FOLLOWS AT THE END */
+} xl_seq_rec;
+
+extern int64 nextval_internal(Oid relid, bool check_permissions);
+extern Datum nextval(PG_FUNCTION_ARGS);
+extern List *sequence_options(Oid relid);
+
+extern ObjectAddress DefineSequence(ParseState *pstate, CreateSeqStmt *stmt);
+extern ObjectAddress AlterSequence(ParseState *pstate, AlterSeqStmt *stmt);
+extern void DeleteSequenceTuple(Oid relid);
+extern void ResetSequence(Oid seq_relid);
+extern void ResetSequenceCaches(void);
+
+extern void seq_redo(XLogReaderState *rptr);
+extern void seq_desc(StringInfo buf, XLogReaderState *rptr);
+extern const char *seq_identify(uint8 info);
+extern void seq_mask(char *pagedata, BlockNumber blkno);
+
+#endif							/* SEQUENCE_H */
diff --git a/src/include/commands/subscriptioncmds.h b/src/include/commands/subscriptioncmds.h
new file mode 100644
index 0000000..3b926f3
--- /dev/null
+++ b/src/include/commands/subscriptioncmds.h
@@ -0,0 +1,29 @@
+/*-------------------------------------------------------------------------
+ *
+ * subscriptioncmds.h
+ *	  prototypes for subscriptioncmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/subscriptioncmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef SUBSCRIPTIONCMDS_H
+#define SUBSCRIPTIONCMDS_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+extern ObjectAddress CreateSubscription(CreateSubscriptionStmt *stmt,
+										bool isTopLevel);
+extern ObjectAddress AlterSubscription(AlterSubscriptionStmt *stmt, bool isTopLevel);
+extern void DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel);
+
+extern ObjectAddress AlterSubscriptionOwner(const char *name, Oid newOwnerId);
+extern void AlterSubscriptionOwner_oid(Oid subid, Oid newOwnerId);
+
+#endif							/* SUBSCRIPTIONCMDS_H */
diff --git a/src/include/commands/tablecmds.h b/src/include/commands/tablecmds.h
new file mode 100644
index 0000000..336549c
--- /dev/null
+++ b/src/include/commands/tablecmds.h
@@ -0,0 +1,106 @@
+/*-------------------------------------------------------------------------
+ *
+ * tablecmds.h
+ *	  prototypes for tablecmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/tablecmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TABLECMDS_H
+#define TABLECMDS_H
+
+#include "access/htup.h"
+#include "catalog/dependency.h"
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+#include "storage/lock.h"
+#include "utils/relcache.h"
+
+struct AlterTableUtilityContext;	/* avoid including tcop/utility.h here */
+
+
+extern ObjectAddress DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
+									ObjectAddress *typaddress, const char *queryString);
+
+extern void RemoveRelations(DropStmt *drop);
+
+extern Oid	AlterTableLookupRelation(AlterTableStmt *stmt, LOCKMODE lockmode);
+
+extern void AlterTable(AlterTableStmt *stmt, LOCKMODE lockmode,
+					   struct AlterTableUtilityContext *context);
+
+extern LOCKMODE AlterTableGetLockLevel(List *cmds);
+
+extern void ATExecChangeOwner(Oid relationOid, Oid newOwnerId, bool recursing, LOCKMODE lockmode);
+
+extern void AlterTableInternal(Oid relid, List *cmds, bool recurse);
+
+extern Oid	AlterTableMoveAll(AlterTableMoveAllStmt *stmt);
+
+extern ObjectAddress AlterTableNamespace(AlterObjectSchemaStmt *stmt,
+										 Oid *oldschema);
+
+extern void AlterTableNamespaceInternal(Relation rel, Oid oldNspOid,
+										Oid nspOid, ObjectAddresses *objsMoved);
+
+extern void AlterRelationNamespaceInternal(Relation classRel, Oid relOid,
+										   Oid oldNspOid, Oid newNspOid,
+										   bool hasDependEntry,
+										   ObjectAddresses *objsMoved);
+
+extern void CheckTableNotInUse(Relation rel, const char *stmt);
+
+extern void ExecuteTruncate(TruncateStmt *stmt);
+extern void ExecuteTruncateGuts(List *explicit_rels,
+								List *relids,
+								List *relids_logged,
+								DropBehavior behavior,
+								bool restart_seqs);
+
+extern void SetRelationHasSubclass(Oid relationId, bool relhassubclass);
+
+extern bool CheckRelationTableSpaceMove(Relation rel, Oid newTableSpaceId);
+extern void SetRelationTableSpace(Relation rel, Oid newTableSpaceId,
+								  Oid newRelFileNode);
+
+extern ObjectAddress renameatt(RenameStmt *stmt);
+
+extern ObjectAddress RenameConstraint(RenameStmt *stmt);
+
+extern ObjectAddress RenameRelation(RenameStmt *stmt);
+
+extern void RenameRelationInternal(Oid myrelid,
+								   const char *newrelname, bool is_internal,
+								   bool is_index);
+
+extern void ResetRelRewrite(Oid myrelid);
+
+extern void find_composite_type_dependencies(Oid typeOid,
+											 Relation origRelation,
+											 const char *origTypeName);
+
+extern void check_of_type(HeapTuple typetuple);
+
+extern void register_on_commit_action(Oid relid, OnCommitAction action);
+extern void remove_on_commit_action(Oid relid);
+
+extern void PreCommit_on_commit_actions(void);
+extern void AtEOXact_on_commit_actions(bool isCommit);
+extern void AtEOSubXact_on_commit_actions(bool isCommit,
+										  SubTransactionId mySubid,
+										  SubTransactionId parentSubid);
+
+extern void RangeVarCallbackOwnsTable(const RangeVar *relation,
+									  Oid relId, Oid oldRelId, void *arg);
+
+extern void RangeVarCallbackOwnsRelation(const RangeVar *relation,
+										 Oid relId, Oid oldRelId, void *arg);
+extern bool PartConstraintImpliedByRelConstraint(Relation scanrel,
+												 List *partConstraint);
+
+#endif							/* TABLECMDS_H */
diff --git a/src/include/commands/tablespace.h b/src/include/commands/tablespace.h
new file mode 100644
index 0000000..f33ba51
--- /dev/null
+++ b/src/include/commands/tablespace.h
@@ -0,0 +1,69 @@
+/*-------------------------------------------------------------------------
+ *
+ * tablespace.h
+ *		Tablespace management commands (create/drop tablespace).
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/tablespace.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TABLESPACE_H
+#define TABLESPACE_H
+
+#include "access/xlogreader.h"
+#include "catalog/objectaddress.h"
+#include "lib/stringinfo.h"
+#include "nodes/parsenodes.h"
+
+extern bool allow_in_place_tablespaces;
+
+/* XLOG stuff */
+#define XLOG_TBLSPC_CREATE		0x00
+#define XLOG_TBLSPC_DROP		0x10
+
+typedef struct xl_tblspc_create_rec
+{
+	Oid			ts_id;
+	char		ts_path[FLEXIBLE_ARRAY_MEMBER]; /* null-terminated string */
+} xl_tblspc_create_rec;
+
+typedef struct xl_tblspc_drop_rec
+{
+	Oid			ts_id;
+} xl_tblspc_drop_rec;
+
+typedef struct TableSpaceOpts
+{
+	int32		vl_len_;		/* varlena header (do not touch directly!) */
+	float8		random_page_cost;
+	float8		seq_page_cost;
+	int			effective_io_concurrency;
+	int			maintenance_io_concurrency;
+} TableSpaceOpts;
+
+extern Oid	CreateTableSpace(CreateTableSpaceStmt *stmt);
+extern void DropTableSpace(DropTableSpaceStmt *stmt);
+extern ObjectAddress RenameTableSpace(const char *oldname, const char *newname);
+extern Oid	AlterTableSpaceOptions(AlterTableSpaceOptionsStmt *stmt);
+
+extern void TablespaceCreateDbspace(Oid spcNode, Oid dbNode, bool isRedo);
+
+extern Oid	GetDefaultTablespace(char relpersistence, bool partitioned);
+
+extern void PrepareTempTablespaces(void);
+
+extern Oid	get_tablespace_oid(const char *tablespacename, bool missing_ok);
+extern char *get_tablespace_name(Oid spc_oid);
+
+extern bool directory_is_empty(const char *path);
+extern void remove_tablespace_symlink(const char *linkloc);
+
+extern void tblspc_redo(XLogReaderState *rptr);
+extern void tblspc_desc(StringInfo buf, XLogReaderState *rptr);
+extern const char *tblspc_identify(uint8 info);
+
+#endif							/* TABLESPACE_H */
diff --git a/src/include/commands/trigger.h b/src/include/commands/trigger.h
new file mode 100644
index 0000000..a97a2ef
--- /dev/null
+++ b/src/include/commands/trigger.h
@@ -0,0 +1,277 @@
+/*-------------------------------------------------------------------------
+ *
+ * trigger.h
+ *	  Declarations for trigger handling.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/trigger.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TRIGGER_H
+#define TRIGGER_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/execnodes.h"
+#include "nodes/parsenodes.h"
+
+/*
+ * TriggerData is the node type that is passed as fmgr "context" info
+ * when a function is called by the trigger manager.
+ */
+
+#define CALLED_AS_TRIGGER(fcinfo) \
+	((fcinfo)->context != NULL && IsA((fcinfo)->context, TriggerData))
+
+typedef uint32 TriggerEvent;
+
+typedef struct TriggerData
+{
+	NodeTag		type;
+	TriggerEvent tg_event;
+	Relation	tg_relation;
+	HeapTuple	tg_trigtuple;
+	HeapTuple	tg_newtuple;
+	Trigger    *tg_trigger;
+	TupleTableSlot *tg_trigslot;
+	TupleTableSlot *tg_newslot;
+	Tuplestorestate *tg_oldtable;
+	Tuplestorestate *tg_newtable;
+	const Bitmapset *tg_updatedcols;
+} TriggerData;
+
+/*
+ * The state for capturing old and new tuples into transition tables for a
+ * single ModifyTable node (or other operation source, e.g. copyfrom.c).
+ *
+ * This is per-caller to avoid conflicts in setting
+ * tcs_original_insert_tuple.  Note, however, that the pointed-to
+ * private data may be shared across multiple callers.
+ */
+struct AfterTriggersTableData;	/* private in trigger.c */
+
+typedef struct TransitionCaptureState
+{
+	/*
+	 * Is there at least one trigger specifying each transition relation on
+	 * the relation explicitly named in the DML statement or COPY command?
+	 * Note: in current usage, these flags could be part of the private state,
+	 * but it seems possibly useful to let callers see them.
+	 */
+	bool		tcs_delete_old_table;
+	bool		tcs_update_old_table;
+	bool		tcs_update_new_table;
+	bool		tcs_insert_new_table;
+
+	/*
+	 * For INSERT and COPY, it would be wasteful to convert tuples from child
+	 * format to parent format after they have already been converted in the
+	 * opposite direction during routing.  In that case we bypass conversion
+	 * and allow the inserting code (copyfrom.c and nodeModifyTable.c) to
+	 * provide a slot containing the original tuple directly.
+	 */
+	TupleTableSlot *tcs_original_insert_tuple;
+
+	/*
+	 * Private data including the tuplestore(s) into which to insert tuples.
+	 */
+	struct AfterTriggersTableData *tcs_private;
+} TransitionCaptureState;
+
+/*
+ * TriggerEvent bit flags
+ *
+ * Note that we assume different event types (INSERT/DELETE/UPDATE/TRUNCATE)
+ * can't be OR'd together in a single TriggerEvent.  This is unlike the
+ * situation for pg_trigger rows, so pg_trigger.tgtype uses a different
+ * representation!
+ */
+#define TRIGGER_EVENT_INSERT			0x00000000
+#define TRIGGER_EVENT_DELETE			0x00000001
+#define TRIGGER_EVENT_UPDATE			0x00000002
+#define TRIGGER_EVENT_TRUNCATE			0x00000003
+#define TRIGGER_EVENT_OPMASK			0x00000003
+
+#define TRIGGER_EVENT_ROW				0x00000004
+
+#define TRIGGER_EVENT_BEFORE			0x00000008
+#define TRIGGER_EVENT_AFTER				0x00000000
+#define TRIGGER_EVENT_INSTEAD			0x00000010
+#define TRIGGER_EVENT_TIMINGMASK		0x00000018
+
+/* More TriggerEvent flags, used only within trigger.c */
+
+#define AFTER_TRIGGER_DEFERRABLE		0x00000020
+#define AFTER_TRIGGER_INITDEFERRED		0x00000040
+
+#define TRIGGER_FIRED_BY_INSERT(event) \
+	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_INSERT)
+
+#define TRIGGER_FIRED_BY_DELETE(event) \
+	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_DELETE)
+
+#define TRIGGER_FIRED_BY_UPDATE(event) \
+	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_UPDATE)
+
+#define TRIGGER_FIRED_BY_TRUNCATE(event) \
+	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_TRUNCATE)
+
+#define TRIGGER_FIRED_FOR_ROW(event) \
+	((event) & TRIGGER_EVENT_ROW)
+
+#define TRIGGER_FIRED_FOR_STATEMENT(event) \
+	(!TRIGGER_FIRED_FOR_ROW(event))
+
+#define TRIGGER_FIRED_BEFORE(event) \
+	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_BEFORE)
+
+#define TRIGGER_FIRED_AFTER(event) \
+	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_AFTER)
+
+#define TRIGGER_FIRED_INSTEAD(event) \
+	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_INSTEAD)
+
+/*
+ * Definitions for replication role based firing.
+ */
+#define SESSION_REPLICATION_ROLE_ORIGIN		0
+#define SESSION_REPLICATION_ROLE_REPLICA	1
+#define SESSION_REPLICATION_ROLE_LOCAL		2
+extern PGDLLIMPORT int SessionReplicationRole;
+
+/*
+ * States at which a trigger can be fired. These are the
+ * possible values for pg_trigger.tgenabled.
+ */
+#define TRIGGER_FIRES_ON_ORIGIN				'O'
+#define TRIGGER_FIRES_ALWAYS				'A'
+#define TRIGGER_FIRES_ON_REPLICA			'R'
+#define TRIGGER_DISABLED					'D'
+
+extern ObjectAddress CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
+								   Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid,
+								   Oid funcoid, Oid parentTriggerOid, Node *whenClause,
+								   bool isInternal, bool in_partition);
+extern ObjectAddress CreateTriggerFiringOn(CreateTrigStmt *stmt, const char *queryString,
+										   Oid relOid, Oid refRelOid, Oid constraintOid,
+										   Oid indexOid, Oid funcoid, Oid parentTriggerOid,
+										   Node *whenClause, bool isInternal, bool in_partition,
+										   char trigger_fires_when);
+
+extern void RemoveTriggerById(Oid trigOid);
+extern Oid	get_trigger_oid(Oid relid, const char *name, bool missing_ok);
+
+extern ObjectAddress renametrig(RenameStmt *stmt);
+
+extern void EnableDisableTriggerNew(Relation rel, const char *tgname,
+									char fires_when, bool skip_system, bool recurse,
+									LOCKMODE lockmode);
+extern void EnableDisableTrigger(Relation rel, const char *tgname,
+								 char fires_when, bool skip_system, LOCKMODE lockmode);
+
+extern void RelationBuildTriggers(Relation relation);
+
+extern TriggerDesc *CopyTriggerDesc(TriggerDesc *trigdesc);
+
+extern const char *FindTriggerIncompatibleWithInheritance(TriggerDesc *trigdesc);
+
+extern TransitionCaptureState *MakeTransitionCaptureState(TriggerDesc *trigdesc,
+														  Oid relid, CmdType cmdType);
+
+extern void FreeTriggerDesc(TriggerDesc *trigdesc);
+
+extern void ExecBSInsertTriggers(EState *estate,
+								 ResultRelInfo *relinfo);
+extern void ExecASInsertTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecBRInsertTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TupleTableSlot *slot);
+extern void ExecARInsertTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TupleTableSlot *slot,
+								 List *recheckIndexes,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecIRInsertTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TupleTableSlot *slot);
+extern void ExecBSDeleteTriggers(EState *estate,
+								 ResultRelInfo *relinfo);
+extern void ExecASDeleteTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecBRDeleteTriggers(EState *estate,
+								 EPQState *epqstate,
+								 ResultRelInfo *relinfo,
+								 ItemPointer tupleid,
+								 HeapTuple fdw_trigtuple,
+								 TupleTableSlot **epqslot);
+extern void ExecARDeleteTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 ItemPointer tupleid,
+								 HeapTuple fdw_trigtuple,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecIRDeleteTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 HeapTuple trigtuple);
+extern void ExecBSUpdateTriggers(EState *estate,
+								 ResultRelInfo *relinfo);
+extern void ExecASUpdateTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecBRUpdateTriggers(EState *estate,
+								 EPQState *epqstate,
+								 ResultRelInfo *relinfo,
+								 ItemPointer tupleid,
+								 HeapTuple fdw_trigtuple,
+								 TupleTableSlot *slot);
+extern void ExecARUpdateTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 ItemPointer tupleid,
+								 HeapTuple fdw_trigtuple,
+								 TupleTableSlot *slot,
+								 List *recheckIndexes,
+								 TransitionCaptureState *transition_capture);
+extern bool ExecIRUpdateTriggers(EState *estate,
+								 ResultRelInfo *relinfo,
+								 HeapTuple trigtuple,
+								 TupleTableSlot *slot);
+extern void ExecBSTruncateTriggers(EState *estate,
+								   ResultRelInfo *relinfo);
+extern void ExecASTruncateTriggers(EState *estate,
+								   ResultRelInfo *relinfo);
+
+extern void AfterTriggerBeginXact(void);
+extern void AfterTriggerBeginQuery(void);
+extern void AfterTriggerEndQuery(EState *estate);
+extern void AfterTriggerFireDeferred(void);
+extern void AfterTriggerEndXact(bool isCommit);
+extern void AfterTriggerBeginSubXact(void);
+extern void AfterTriggerEndSubXact(bool isCommit);
+extern void AfterTriggerSetState(ConstraintsSetStmt *stmt);
+extern bool AfterTriggerPendingOnRel(Oid relid);
+
+
+/*
+ * in utils/adt/ri_triggers.c
+ */
+extern bool RI_FKey_pk_upd_check_required(Trigger *trigger, Relation pk_rel,
+										  TupleTableSlot *old_slot, TupleTableSlot *new_slot);
+extern bool RI_FKey_fk_upd_check_required(Trigger *trigger, Relation fk_rel,
+										  TupleTableSlot *old_slot, TupleTableSlot *new_slot);
+extern bool RI_Initial_Check(Trigger *trigger,
+							 Relation fk_rel, Relation pk_rel);
+extern void RI_PartitionRemove_Check(Trigger *trigger, Relation fk_rel,
+									 Relation pk_rel);
+
+/* result values for RI_FKey_trigger_type: */
+#define RI_TRIGGER_PK	1		/* is a trigger on the PK relation */
+#define RI_TRIGGER_FK	2		/* is a trigger on the FK relation */
+#define RI_TRIGGER_NONE 0		/* is not an RI trigger function */
+
+extern int	RI_FKey_trigger_type(Oid tgfoid);
+
+#endif							/* TRIGGER_H */
diff --git a/src/include/commands/typecmds.h b/src/include/commands/typecmds.h
new file mode 100644
index 0000000..8806791
--- /dev/null
+++ b/src/include/commands/typecmds.h
@@ -0,0 +1,61 @@
+/*-------------------------------------------------------------------------
+ *
+ * typecmds.h
+ *	  prototypes for typecmds.c.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/typecmds.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TYPECMDS_H
+#define TYPECMDS_H
+
+#include "access/htup.h"
+#include "catalog/dependency.h"
+#include "parser/parse_node.h"
+
+
+#define DEFAULT_TYPDELIM		','
+
+extern ObjectAddress DefineType(ParseState *pstate, List *names, List *parameters);
+extern void RemoveTypeById(Oid typeOid);
+extern ObjectAddress DefineDomain(CreateDomainStmt *stmt);
+extern ObjectAddress DefineEnum(CreateEnumStmt *stmt);
+extern ObjectAddress DefineRange(CreateRangeStmt *stmt);
+extern ObjectAddress AlterEnum(AlterEnumStmt *stmt);
+extern ObjectAddress DefineCompositeType(RangeVar *typevar, List *coldeflist);
+extern Oid	AssignTypeArrayOid(void);
+extern Oid	AssignTypeMultirangeOid(void);
+extern Oid	AssignTypeMultirangeArrayOid(void);
+
+extern ObjectAddress AlterDomainDefault(List *names, Node *defaultRaw);
+extern ObjectAddress AlterDomainNotNull(List *names, bool notNull);
+extern ObjectAddress AlterDomainAddConstraint(List *names, Node *constr,
+											  ObjectAddress *constrAddr);
+extern ObjectAddress AlterDomainValidateConstraint(List *names, const char *constrName);
+extern ObjectAddress AlterDomainDropConstraint(List *names, const char *constrName,
+											   DropBehavior behavior, bool missing_ok);
+
+extern void checkDomainOwner(HeapTuple tup);
+
+extern ObjectAddress RenameType(RenameStmt *stmt);
+
+extern ObjectAddress AlterTypeOwner(List *names, Oid newOwnerId, ObjectType objecttype);
+extern void AlterTypeOwner_oid(Oid typeOid, Oid newOwnerId, bool hasDependEntry);
+extern void AlterTypeOwnerInternal(Oid typeOid, Oid newOwnerId);
+
+extern ObjectAddress AlterTypeNamespace(List *names, const char *newschema,
+										ObjectType objecttype, Oid *oldschema);
+extern Oid	AlterTypeNamespace_oid(Oid typeOid, Oid nspOid, ObjectAddresses *objsMoved);
+extern Oid	AlterTypeNamespaceInternal(Oid typeOid, Oid nspOid,
+									   bool isImplicitArray,
+									   bool errorOnTableType,
+									   ObjectAddresses *objsMoved);
+
+extern ObjectAddress AlterType(AlterTypeStmt *stmt);
+
+#endif							/* TYPECMDS_H */
diff --git a/src/include/commands/user.h b/src/include/commands/user.h
new file mode 100644
index 0000000..028e0dd
--- /dev/null
+++ b/src/include/commands/user.h
@@ -0,0 +1,37 @@
+/*-------------------------------------------------------------------------
+ *
+ * user.h
+ *	  Commands for manipulating roles (formerly called users).
+ *
+ *
+ * src/include/commands/user.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef USER_H
+#define USER_H
+
+#include "catalog/objectaddress.h"
+#include "libpq/crypt.h"
+#include "nodes/parsenodes.h"
+#include "parser/parse_node.h"
+
+/* GUC. Is actually of type PasswordType. */
+extern int	Password_encryption;
+
+/* Hook to check passwords in CreateRole() and AlterRole() */
+typedef void (*check_password_hook_type) (const char *username, const char *shadow_pass, PasswordType password_type, Datum validuntil_time, bool validuntil_null);
+
+extern PGDLLIMPORT check_password_hook_type check_password_hook;
+
+extern Oid	CreateRole(ParseState *pstate, CreateRoleStmt *stmt);
+extern Oid	AlterRole(AlterRoleStmt *stmt);
+extern Oid	AlterRoleSet(AlterRoleSetStmt *stmt);
+extern void DropRole(DropRoleStmt *stmt);
+extern void GrantRole(GrantRoleStmt *stmt);
+extern ObjectAddress RenameRole(const char *oldname, const char *newname);
+extern void DropOwnedObjects(DropOwnedStmt *stmt);
+extern void ReassignOwnedObjects(ReassignOwnedStmt *stmt);
+extern List *roleSpecsToIds(List *memberNames);
+
+#endif							/* USER_H */
diff --git a/src/include/commands/vacuum.h b/src/include/commands/vacuum.h
new file mode 100644
index 0000000..4cfd52e
--- /dev/null
+++ b/src/include/commands/vacuum.h
@@ -0,0 +1,297 @@
+/*-------------------------------------------------------------------------
+ *
+ * vacuum.h
+ *	  header file for postgres vacuum cleaner and statistics analyzer
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/vacuum.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef VACUUM_H
+#define VACUUM_H
+
+#include "access/htup.h"
+#include "catalog/pg_class.h"
+#include "catalog/pg_statistic.h"
+#include "catalog/pg_type.h"
+#include "parser/parse_node.h"
+#include "storage/buf.h"
+#include "storage/lock.h"
+#include "utils/relcache.h"
+
+/*
+ * Flags for amparallelvacuumoptions to control the participation of bulkdelete
+ * and vacuumcleanup in parallel vacuum.
+ */
+
+/*
+ * Both bulkdelete and vacuumcleanup are disabled by default.  This will be
+ * used by IndexAM's that don't want to or cannot participate in parallel
+ * vacuum.  For example, if an index AM doesn't have a way to communicate the
+ * index statistics allocated by the first ambulkdelete call to the subsequent
+ * ones until amvacuumcleanup, the index AM cannot participate in parallel
+ * vacuum.
+ */
+#define VACUUM_OPTION_NO_PARALLEL			0
+
+/*
+ * bulkdelete can be performed in parallel.  This option can be used by
+ * index AMs that need to scan indexes to delete tuples.
+ */
+#define VACUUM_OPTION_PARALLEL_BULKDEL		(1 << 0)
+
+/*
+ * vacuumcleanup can be performed in parallel if bulkdelete is not performed
+ * yet.  This will be used by IndexAM's that can scan the index if the
+ * bulkdelete is not performed.
+ */
+#define VACUUM_OPTION_PARALLEL_COND_CLEANUP	(1 << 1)
+
+/*
+ * vacuumcleanup can be performed in parallel even if bulkdelete has already
+ * processed the index.  This will be used by IndexAM's that scan the index
+ * during the cleanup phase of index irrespective of whether the index is
+ * already scanned or not during bulkdelete phase.
+ */
+#define VACUUM_OPTION_PARALLEL_CLEANUP		(1 << 2)
+
+/* value for checking vacuum flags */
+#define VACUUM_OPTION_MAX_VALID_VALUE		((1 << 3) - 1)
+
+/*----------
+ * ANALYZE builds one of these structs for each attribute (column) that is
+ * to be analyzed.  The struct and subsidiary data are in anl_context,
+ * so they live until the end of the ANALYZE operation.
+ *
+ * The type-specific typanalyze function is passed a pointer to this struct
+ * and must return true to continue analysis, false to skip analysis of this
+ * column.  In the true case it must set the compute_stats and minrows fields,
+ * and can optionally set extra_data to pass additional info to compute_stats.
+ * minrows is its request for the minimum number of sample rows to be gathered
+ * (but note this request might not be honored, eg if there are fewer rows
+ * than that in the table).
+ *
+ * The compute_stats routine will be called after sample rows have been
+ * gathered.  Aside from this struct, it is passed:
+ *		fetchfunc: a function for accessing the column values from the
+ *				   sample rows
+ *		samplerows: the number of sample tuples
+ *		totalrows: estimated total number of rows in relation
+ * The fetchfunc may be called with rownum running from 0 to samplerows-1.
+ * It returns a Datum and an isNull flag.
+ *
+ * compute_stats should set stats_valid true if it is able to compute
+ * any useful statistics.  If it does, the remainder of the struct holds
+ * the information to be stored in a pg_statistic row for the column.  Be
+ * careful to allocate any pointed-to data in anl_context, which will NOT
+ * be CurrentMemoryContext when compute_stats is called.
+ *
+ * Note: all comparisons done for statistical purposes should use the
+ * underlying column's collation (attcollation), except in situations
+ * where a noncollatable container type contains a collatable type;
+ * in that case use the type's default collation.  Be sure to record
+ * the appropriate collation in stacoll.
+ *----------
+ */
+typedef struct VacAttrStats *VacAttrStatsP;
+
+typedef Datum (*AnalyzeAttrFetchFunc) (VacAttrStatsP stats, int rownum,
+									   bool *isNull);
+
+typedef void (*AnalyzeAttrComputeStatsFunc) (VacAttrStatsP stats,
+											 AnalyzeAttrFetchFunc fetchfunc,
+											 int samplerows,
+											 double totalrows);
+
+typedef struct VacAttrStats
+{
+	/*
+	 * These fields are set up by the main ANALYZE code before invoking the
+	 * type-specific typanalyze function.
+	 *
+	 * Note: do not assume that the data being analyzed has the same datatype
+	 * shown in attr, ie do not trust attr->atttypid, attlen, etc.  This is
+	 * because some index opclasses store a different type than the underlying
+	 * column/expression.  Instead use attrtypid, attrtypmod, and attrtype for
+	 * information about the datatype being fed to the typanalyze function.
+	 * Likewise, use attrcollid not attr->attcollation.
+	 */
+	Form_pg_attribute attr;		/* copy of pg_attribute row for column */
+	Oid			attrtypid;		/* type of data being analyzed */
+	int32		attrtypmod;		/* typmod of data being analyzed */
+	Form_pg_type attrtype;		/* copy of pg_type row for attrtypid */
+	Oid			attrcollid;		/* collation of data being analyzed */
+	MemoryContext anl_context;	/* where to save long-lived data */
+
+	/*
+	 * These fields must be filled in by the typanalyze routine, unless it
+	 * returns false.
+	 */
+	AnalyzeAttrComputeStatsFunc compute_stats;	/* function pointer */
+	int			minrows;		/* Minimum # of rows wanted for stats */
+	void	   *extra_data;		/* for extra type-specific data */
+
+	/*
+	 * These fields are to be filled in by the compute_stats routine. (They
+	 * are initialized to zero when the struct is created.)
+	 */
+	bool		stats_valid;
+	float4		stanullfrac;	/* fraction of entries that are NULL */
+	int32		stawidth;		/* average width of column values */
+	float4		stadistinct;	/* # distinct values */
+	int16		stakind[STATISTIC_NUM_SLOTS];
+	Oid			staop[STATISTIC_NUM_SLOTS];
+	Oid			stacoll[STATISTIC_NUM_SLOTS];
+	int			numnumbers[STATISTIC_NUM_SLOTS];
+	float4	   *stanumbers[STATISTIC_NUM_SLOTS];
+	int			numvalues[STATISTIC_NUM_SLOTS];
+	Datum	   *stavalues[STATISTIC_NUM_SLOTS];
+
+	/*
+	 * These fields describe the stavalues[n] element types. They will be
+	 * initialized to match attrtypid, but a custom typanalyze function might
+	 * want to store an array of something other than the analyzed column's
+	 * elements. It should then overwrite these fields.
+	 */
+	Oid			statypid[STATISTIC_NUM_SLOTS];
+	int16		statyplen[STATISTIC_NUM_SLOTS];
+	bool		statypbyval[STATISTIC_NUM_SLOTS];
+	char		statypalign[STATISTIC_NUM_SLOTS];
+
+	/*
+	 * These fields are private to the main ANALYZE code and should not be
+	 * looked at by type-specific functions.
+	 */
+	int			tupattnum;		/* attribute number within tuples */
+	HeapTuple  *rows;			/* access info for std fetch function */
+	TupleDesc	tupDesc;
+	Datum	   *exprvals;		/* access info for index fetch function */
+	bool	   *exprnulls;
+	int			rowstride;
+} VacAttrStats;
+
+/* flag bits for VacuumParams->options */
+#define VACOPT_VACUUM 0x01		/* do VACUUM */
+#define VACOPT_ANALYZE 0x02		/* do ANALYZE */
+#define VACOPT_VERBOSE 0x04		/* print progress info */
+#define VACOPT_FREEZE 0x08		/* FREEZE option */
+#define VACOPT_FULL 0x10		/* FULL (non-concurrent) vacuum */
+#define VACOPT_SKIP_LOCKED 0x20 /* skip if cannot get lock */
+#define VACOPT_PROCESS_TOAST 0x40	/* process the TOAST table, if any */
+#define VACOPT_DISABLE_PAGE_SKIPPING 0x80	/* don't skip any pages */
+
+/*
+ * Values used by index_cleanup and truncate params.
+ *
+ * VACOPTVALUE_UNSPECIFIED is used as an initial placeholder when VACUUM
+ * command has no explicit value.  When that happens the final usable value
+ * comes from the corresponding reloption (though the reloption default is
+ * usually used).
+ */
+typedef enum VacOptValue
+{
+	VACOPTVALUE_UNSPECIFIED = 0,
+	VACOPTVALUE_AUTO,
+	VACOPTVALUE_DISABLED,
+	VACOPTVALUE_ENABLED,
+} VacOptValue;
+
+/*
+ * Parameters customizing behavior of VACUUM and ANALYZE.
+ *
+ * Note that at least one of VACOPT_VACUUM and VACOPT_ANALYZE must be set
+ * in options.
+ */
+typedef struct VacuumParams
+{
+	bits32		options;		/* bitmask of VACOPT_* */
+	int			freeze_min_age; /* min freeze age, -1 to use default */
+	int			freeze_table_age;	/* age at which to scan whole table */
+	int			multixact_freeze_min_age;	/* min multixact freeze age, -1 to
+											 * use default */
+	int			multixact_freeze_table_age; /* multixact age at which to scan
+											 * whole table */
+	bool		is_wraparound;	/* force a for-wraparound vacuum */
+	int			log_min_duration;	/* minimum execution threshold in ms at
+									 * which  verbose logs are activated, -1
+									 * to use default */
+	VacOptValue index_cleanup;	/* Do index vacuum and cleanup */
+	VacOptValue truncate;		/* Truncate empty pages at the end */
+
+	/*
+	 * The number of parallel vacuum workers.  0 by default which means choose
+	 * based on the number of indexes.  -1 indicates parallel vacuum is
+	 * disabled.
+	 */
+	int			nworkers;
+} VacuumParams;
+
+/* GUC parameters */
+extern PGDLLIMPORT int default_statistics_target;	/* PGDLLIMPORT for PostGIS */
+extern int	vacuum_freeze_min_age;
+extern int	vacuum_freeze_table_age;
+extern int	vacuum_multixact_freeze_min_age;
+extern int	vacuum_multixact_freeze_table_age;
+extern int	vacuum_failsafe_age;
+extern int	vacuum_multixact_failsafe_age;
+
+/* Variables for cost-based parallel vacuum */
+extern pg_atomic_uint32 *VacuumSharedCostBalance;
+extern pg_atomic_uint32 *VacuumActiveNWorkers;
+extern int	VacuumCostBalanceLocal;
+
+
+/* in commands/vacuum.c */
+extern void ExecVacuum(ParseState *pstate, VacuumStmt *vacstmt, bool isTopLevel);
+extern void vacuum(List *relations, VacuumParams *params,
+				   BufferAccessStrategy bstrategy, bool isTopLevel);
+extern void vac_open_indexes(Relation relation, LOCKMODE lockmode,
+							 int *nindexes, Relation **Irel);
+extern void vac_close_indexes(int nindexes, Relation *Irel, LOCKMODE lockmode);
+extern double vac_estimate_reltuples(Relation relation,
+									 BlockNumber total_pages,
+									 BlockNumber scanned_pages,
+									 double scanned_tuples);
+extern void vac_update_relstats(Relation relation,
+								BlockNumber num_pages,
+								double num_tuples,
+								BlockNumber num_all_visible_pages,
+								bool hasindex,
+								TransactionId frozenxid,
+								MultiXactId minmulti,
+								bool in_outer_xact);
+extern void vacuum_set_xid_limits(Relation rel,
+								  int freeze_min_age, int freeze_table_age,
+								  int multixact_freeze_min_age,
+								  int multixact_freeze_table_age,
+								  TransactionId *oldestXmin,
+								  TransactionId *freezeLimit,
+								  TransactionId *xidFullScanLimit,
+								  MultiXactId *multiXactCutoff,
+								  MultiXactId *mxactFullScanLimit);
+extern bool vacuum_xid_failsafe_check(TransactionId relfrozenxid,
+									  MultiXactId relminmxid);
+extern void vac_update_datfrozenxid(void);
+extern void vacuum_delay_point(void);
+extern bool vacuum_is_relation_owner(Oid relid, Form_pg_class reltuple,
+									 bits32 options);
+extern Relation vacuum_open_relation(Oid relid, RangeVar *relation,
+									 bits32 options, bool verbose,
+									 LOCKMODE lmode);
+
+/* in commands/analyze.c */
+extern void analyze_rel(Oid relid, RangeVar *relation,
+						VacuumParams *params, List *va_cols, bool in_outer_xact,
+						BufferAccessStrategy bstrategy);
+extern bool std_typanalyze(VacAttrStats *stats);
+
+/* in utils/misc/sampling.c --- duplicate of declarations in utils/sampling.h */
+extern double anl_random_fract(void);
+extern double anl_init_selection_state(int n);
+extern double anl_get_next_S(double t, int n, double *stateptr);
+
+#endif							/* VACUUM_H */
diff --git a/src/include/commands/variable.h b/src/include/commands/variable.h
new file mode 100644
index 0000000..483bc79
--- /dev/null
+++ b/src/include/commands/variable.h
@@ -0,0 +1,38 @@
+/*
+ * variable.h
+ *		Routines for handling specialized SET variables.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/variable.h
+ */
+#ifndef VARIABLE_H
+#define VARIABLE_H
+
+#include "utils/guc.h"
+
+
+extern bool check_datestyle(char **newval, void **extra, GucSource source);
+extern void assign_datestyle(const char *newval, void *extra);
+extern bool check_timezone(char **newval, void **extra, GucSource source);
+extern void assign_timezone(const char *newval, void *extra);
+extern const char *show_timezone(void);
+extern bool check_log_timezone(char **newval, void **extra, GucSource source);
+extern void assign_log_timezone(const char *newval, void *extra);
+extern const char *show_log_timezone(void);
+extern bool check_transaction_read_only(bool *newval, void **extra, GucSource source);
+extern bool check_XactIsoLevel(int *newval, void **extra, GucSource source);
+extern bool check_transaction_deferrable(bool *newval, void **extra, GucSource source);
+extern bool check_random_seed(double *newval, void **extra, GucSource source);
+extern void assign_random_seed(double newval, void *extra);
+extern const char *show_random_seed(void);
+extern bool check_client_encoding(char **newval, void **extra, GucSource source);
+extern void assign_client_encoding(const char *newval, void *extra);
+extern bool check_session_authorization(char **newval, void **extra, GucSource source);
+extern void assign_session_authorization(const char *newval, void *extra);
+extern bool check_role(char **newval, void **extra, GucSource source);
+extern void assign_role(const char *newval, void *extra);
+extern const char *show_role(void);
+
+#endif							/* VARIABLE_H */
diff --git a/src/include/commands/view.h b/src/include/commands/view.h
new file mode 100644
index 0000000..d28f817
--- /dev/null
+++ b/src/include/commands/view.h
@@ -0,0 +1,25 @@
+/*-------------------------------------------------------------------------
+ *
+ * view.h
+ *
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/commands/view.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef VIEW_H
+#define VIEW_H
+
+#include "catalog/objectaddress.h"
+#include "nodes/parsenodes.h"
+
+extern ObjectAddress DefineView(ViewStmt *stmt, const char *queryString,
+								int stmt_location, int stmt_len);
+
+extern void StoreViewQuery(Oid viewOid, Query *viewParse, bool replace);
+
+#endif							/* VIEW_H */