1 /*-------------------------------------------------------------------------
5 * Routines for type coercion.
7 * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
10 * $Id: parse_coerce.h,v 1.41 2002/03/20 19:45:07 tgl Exp $
12 *-------------------------------------------------------------------------
14 #ifndef PARSE_COERCE_H
15 #define PARSE_COERCE_H
17 #include "catalog/pg_type.h"
18 #include "parser/parse_node.h"
37 extern bool IsBinaryCompatible(Oid type1, Oid type2);
38 extern bool IsPreferredType(CATEGORY category, Oid type);
39 extern CATEGORY TypeCategory(Oid type);
41 extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *func_typeids);
42 extern Node *coerce_type(ParseState *pstate, Node *node, Oid inputTypeId,
43 Oid targetTypeId, int32 atttypmod);
44 extern Node *coerce_type_typmod(ParseState *pstate, Node *node,
45 Oid targetTypeId, int32 atttypmod);
47 extern bool coerce_to_boolean(ParseState *pstate, Node **pnode);
49 extern Oid select_common_type(List *typeids, const char *context);
50 extern Node *coerce_to_common_type(ParseState *pstate, Node *node,
54 #endif /* PARSE_COERCE_H */