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902a6a0a4b
entries, per pghackers discussion. This fixes aggregates to live in namespaces, and also simplifies/speeds up lookup in parse_func.c. Also, add a 'proimplicit' flag to pg_proc that controls whether a type coercion function may be invoked implicitly, or only explicitly. The current settings of these flags are more permissive than I would like, but we will need to debate and refine the behavior; for now, I avoided breaking regression tests as much as I could.
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_func.h
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*
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: parse_func.h,v 1.39 2002/04/11 20:00:15 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSER_FUNC_H
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#define PARSER_FUNC_H
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#include "parser/parse_node.h"
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/*
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* This structure is used to explore the inheritance hierarchy above
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* nodes in the type tree in order to disambiguate among polymorphic
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* functions.
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*/
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typedef struct _InhPaths
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{
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int nsupers; /* number of superclasses */
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Oid self; /* this class */
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Oid *supervec; /* vector of superclasses */
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} InhPaths;
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/*
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* This structure holds a list of possible functions or operators that
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* agree with the known name and argument types of the function/operator.
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*/
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typedef struct _CandidateList
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{
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Oid *args;
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struct _CandidateList *next;
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} *CandidateList;
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/* Result codes for func_get_detail */
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typedef enum
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{
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FUNCDETAIL_NOTFOUND, /* no suitable interpretation */
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FUNCDETAIL_NORMAL, /* found a matching regular function */
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FUNCDETAIL_AGGREGATE, /* found a matching aggregate function */
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FUNCDETAIL_COERCION /* it's a type coercion request */
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} FuncDetailCode;
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extern Node *ParseFuncOrColumn(ParseState *pstate,
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List *funcname, List *fargs,
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bool agg_star, bool agg_distinct, bool is_column);
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extern FuncDetailCode func_get_detail(List *funcname, List *fargs,
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int nargs, Oid *argtypes,
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Oid *funcid, Oid *rettype,
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bool *retset, Oid **true_typeids);
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extern bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
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extern void func_error(const char *caller, List *funcname,
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int nargs, const Oid *argtypes,
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const char *msg);
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extern Oid find_aggregate_func(const char *caller, List *aggname,
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Oid basetype);
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extern Oid LookupFuncName(List *funcname, int nargs, const Oid *argtypes);
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extern Oid LookupFuncNameTypeNames(List *funcname, List *argtypes,
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bool opaqueOK, const char *caller);
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#endif /* PARSE_FUNC_H */
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