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/*-------------------------------------------------------------------------
*
* parse_func.h
*
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_func.h,v 1.46 2003/05/26 00:11:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSER_FUNC_H
#define PARSER_FUNC_H
#include "catalog/namespace.h"
#include "parser/parse_node.h"
/*
* This structure is used to explore the inheritance hierarchy above
* nodes in the type tree in order to disambiguate among polymorphic
* functions.
*/
typedef struct _InhPaths
{
int nsupers; /* number of superclasses */
Oid self; /* this class */
Oid *supervec; /* vector of superclasses */
} InhPaths;
/* Result codes for func_get_detail */
typedef enum
{
FUNCDETAIL_NOTFOUND, /* no suitable interpretation */
FUNCDETAIL_NORMAL, /* found a matching regular function */
FUNCDETAIL_AGGREGATE, /* found a matching aggregate function */
FUNCDETAIL_COERCION /* it's a type coercion request */
} FuncDetailCode;
extern Node *ParseFuncOrColumn(ParseState *pstate,
List *funcname, List *fargs,
bool agg_star, bool agg_distinct, bool is_column);
extern FuncDetailCode func_get_detail(List *funcname, List *fargs,
int nargs, Oid *argtypes,
Oid *funcid, Oid *rettype,
bool *retset, Oid **true_typeids);
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 bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
extern void make_fn_arguments(ParseState *pstate,
List *fargs,
Oid *actual_arg_types,
Oid *declared_arg_types);
extern void func_error(const char *caller, List *funcname,
int nargs, const Oid *argtypes,
const char *msg);
extern Oid find_aggregate_func(const char *caller, List *aggname,
Oid basetype);
extern Oid LookupFuncName(List *funcname, int nargs, const Oid *argtypes);
extern Oid LookupFuncNameTypeNames(List *funcname, List *argtypes,
const char *caller);
#endif /* PARSE_FUNC_H */
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