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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.
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_coerce.h
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*
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* Routines for type coercion.
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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_coerce.h,v 1.42 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 PARSE_COERCE_H
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#define PARSE_COERCE_H
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#include "catalog/pg_type.h"
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#include "parser/parse_node.h"
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typedef enum CATEGORY
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{
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INVALID_TYPE,
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UNKNOWN_TYPE,
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BOOLEAN_TYPE,
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STRING_TYPE,
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BITSTRING_TYPE,
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NUMERIC_TYPE,
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DATETIME_TYPE,
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TIMESPAN_TYPE,
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GEOMETRIC_TYPE,
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NETWORK_TYPE,
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USER_TYPE,
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MIXED_TYPE
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} CATEGORY;
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extern bool IsBinaryCompatible(Oid type1, Oid type2);
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extern bool IsPreferredType(CATEGORY category, Oid type);
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extern CATEGORY TypeCategory(Oid type);
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extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *func_typeids,
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bool isExplicit);
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extern Node *coerce_type(ParseState *pstate, Node *node, Oid inputTypeId,
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Oid targetTypeId, int32 atttypmod, bool isExplicit);
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extern Node *coerce_type_typmod(ParseState *pstate, Node *node,
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Oid targetTypeId, int32 atttypmod);
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extern bool coerce_to_boolean(ParseState *pstate, Node **pnode);
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extern Oid select_common_type(List *typeids, const char *context);
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extern Node *coerce_to_common_type(ParseState *pstate, Node *node,
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Oid targetTypeId,
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const char *context);
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#endif /* PARSE_COERCE_H */
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