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/*-------------------------------------------------------------------------
*
* parse_func.h
*
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_func.h,v 1.28 2001/01/24 19:43:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSER_FUNC_H
#define PARSER_FUNC_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;
/*
* This structure holds a list of possible functions or operators that
* agree with the known name and argument types of the function/operator.
*/
typedef struct _CandidateList
{
Oid *args;
struct _CandidateList *next;
} *CandidateList;
extern Node *ParseNestedFuncOrColumn(ParseState *pstate, Attr *attr,
int precedence);
extern Node *ParseFuncOrColumn(ParseState *pstate,
char *funcname, List *fargs,
bool agg_star, bool agg_distinct,
int precedence);
extern bool func_get_detail(char *funcname, int nargs, Oid *argtypes,
Oid *funcid, Oid *rettype,
bool *retset, Oid **true_typeids);
extern bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
extern void func_error(char *caller, char *funcname,
int nargs, Oid *argtypes, char *msg);
#endif /* PARSE_FUNC_H */
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