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/*-------------------------------------------------------------------------
*
* 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 */
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