parse_func.h

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/*-------------------------------------------------------------------------
 *
 * parse_func.h
 *
 *
 *
 * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/parser/parse_func.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PARSE_FUNC_H
#define PARSE_FUNC_H
 
#include "catalog/namespace.h"
#include "parser/parse_node.h"
 
 
/* Result codes for func_get_detail */
typedef enum
{
    FUNCDETAIL_NOTFOUND,        /* no matching function */
    FUNCDETAIL_MULTIPLE,        /* too many matching functions */
    FUNCDETAIL_NORMAL,          /* found a matching regular function */
    FUNCDETAIL_PROCEDURE,       /* found a matching procedure */
    FUNCDETAIL_AGGREGATE,       /* found a matching aggregate function */
    FUNCDETAIL_WINDOWFUNC,      /* found a matching window function */
    FUNCDETAIL_COERCION,        /* it's a type coercion request */
} FuncDetailCode;
 
 
extern Node *ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs,
                               Node *last_srf, FuncCall *fn, bool proc_call,
                               int location);
 
extern FuncDetailCode func_get_detail(List *funcname,
                                      List *fargs, List *fargnames,
                                      int nargs, Oid *argtypes,
                                      bool expand_variadic, bool expand_defaults,
                                      bool include_out_arguments,
                                      int *fgc_flags,
                                      Oid *funcid, Oid *rettype,
                                      bool *retset, int *nvargs, Oid *vatype,
                                      Oid **true_typeids, List **argdefaults);
 
extern int  func_match_argtypes(int nargs,
                                Oid *input_typeids,
                                FuncCandidateList raw_candidates,
                                FuncCandidateList *candidates);
 
extern FuncCandidateList func_select_candidate(int nargs,
                                               Oid *input_typeids,
                                               FuncCandidateList candidates);
 
extern void make_fn_arguments(ParseState *pstate,
                              List *fargs,
                              Oid *actual_arg_types,
                              Oid *declared_arg_types);
 
extern const char *funcname_signature_string(const char *funcname, int nargs,
                                             List *argnames, const Oid *argtypes);
extern const char *func_signature_string(List *funcname, int nargs,
                                         List *argnames, const Oid *argtypes);
 
extern Oid  LookupFuncName(List *funcname, int nargs, const Oid *argtypes,
                           bool missing_ok);
extern Oid  LookupFuncWithArgs(ObjectType objtype, ObjectWithArgs *func,
                               bool missing_ok);
 
extern void check_srf_call_placement(ParseState *pstate, Node *last_srf,
                                     int location);
 
#endif                          /* PARSE_FUNC_H */