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https://git.postgresql.org/git/postgresql.git
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f45df8c014
blanks, in hopes of reducing the surprise factor for newbies. Remove redundant operators for VARCHAR (it depends wholly on TEXT operations now). Clean up resolution of ambiguous operators/functions to avoid surprising choices for domains: domains are treated as equivalent to their base types and binary-coercibility is no longer considered a preference item when choosing among multiple operators/functions. IsBinaryCoercible now correctly reflects the notion that you need *only* relabel the type to get from type A to type B: that is, a domain is binary-coercible to its base type, but not vice versa. Various marginal cleanup, including merging the essentially duplicate resolution code in parse_func.c and parse_oper.c. Improve opr_sanity regression test to understand about binary compatibility (using pg_cast), and fix a couple of small errors in the catalogs revealed thereby. Restructure "special operator" handling to fetch operators via index opclasses rather than hardwiring assumptions about names (cleans up the pattern_ops stuff a little).
80 lines
2.3 KiB
C
80 lines
2.3 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) 1996-2002, 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 1.46 2003/05/26 00:11:28 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 "catalog/namespace.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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/* 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 int func_match_argtypes(int nargs,
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Oid *input_typeids,
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FuncCandidateList raw_candidates,
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FuncCandidateList *candidates);
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extern FuncCandidateList func_select_candidate(int nargs,
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Oid *input_typeids,
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FuncCandidateList candidates);
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extern bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
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extern void make_fn_arguments(ParseState *pstate,
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List *fargs,
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Oid *actual_arg_types,
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Oid *declared_arg_types);
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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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const char *caller);
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#endif /* PARSE_FUNC_H */
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