1/*-------------------------------------------------------------------------
2 *
3 * fmgrtab.h
4 * The function manager's table of internal functions.
5 *
6 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 * src/include/utils/fmgrtab.h
10 *
11 *-------------------------------------------------------------------------
12 */
13#ifndef FMGRTAB_H
14#define FMGRTAB_H
15
16#include "access/transam.h"
17#include "fmgr.h"
18
19
20/*
21 * This table stores info about all the built-in functions (ie, functions
22 * that are compiled into the Postgres executable).
23 */
24
25typedef struct
26{
27 Oid foid; /* OID of the function */
28 short nargs; /* 0..FUNC_MAX_ARGS, or -1 if variable count */
29 bool strict; /* T if function is "strict" */
30 bool retset; /* T if function returns a set */
31 const char *funcName; /* C name of the function */
32 PGFunction func; /* pointer to compiled function */
33} FmgrBuiltin;
34
35extern const FmgrBuiltin fmgr_builtins[];
36
37extern const int fmgr_nbuiltins; /* number of entries in table */
38
39extern const Oid fmgr_last_builtin_oid; /* highest function OID in table */
40
41/*
42 * Mapping from a builtin function's OID to its index in the fmgr_builtins
43 * array. This is indexed from 0 through fmgr_last_builtin_oid.
44 */
45#define InvalidOidBuiltinMapping PG_UINT16_MAX
46extern const uint16 fmgr_builtin_oid_index[];
47
48#endif /* FMGRTAB_H */
49