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/*-------------------------------------------------------------------------
*
* fmgrtab.h
* The function manager's table of internal functions.
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/utils/fmgrtab.h
*
*-------------------------------------------------------------------------
*/
#ifndef FMGRTAB_H
#define FMGRTAB_H
#include "access/transam.h"
#include "fmgr.h"
/*
* This table stores info about all the built-in functions (ie, functions
* that are compiled into the Postgres executable).
*/
typedef struct
{
Oid foid; /* OID of the function */
short nargs; /* 0..FUNC_MAX_ARGS, or -1 if variable count */
bool strict; /* T if function is "strict" */
bool retset; /* T if function returns a set */
const char *funcName; /* C name of the function */
PGFunction func; /* pointer to compiled function */
} FmgrBuiltin;
extern PGDLLIMPORT const FmgrBuiltin fmgr_builtins[];
extern PGDLLIMPORT const int fmgr_nbuiltins; /* number of entries in table */
extern PGDLLIMPORT const Oid fmgr_last_builtin_oid; /* highest function OID in
* table */
/*
* Mapping from a builtin function's OID to its index in the fmgr_builtins
* array. This is indexed from 0 through fmgr_last_builtin_oid.
*/
#define InvalidOidBuiltinMapping PG_UINT16_MAX
extern PGDLLIMPORT const uint16 fmgr_builtin_oid_index[];
#endif /* FMGRTAB_H */
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