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/*-------------------------------------------------------------------------
*
* parse_coerce.h
* Routines for type coercion.
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_coerce.h,v 1.48 2002/10/24 22:09:00 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_COERCE_H
#define PARSE_COERCE_H
#include "catalog/pg_type.h"
#include "parser/parse_node.h"
typedef enum CATEGORY
{
INVALID_TYPE,
UNKNOWN_TYPE,
BOOLEAN_TYPE,
STRING_TYPE,
BITSTRING_TYPE,
NUMERIC_TYPE,
DATETIME_TYPE,
TIMESPAN_TYPE,
GEOMETRIC_TYPE,
NETWORK_TYPE,
USER_TYPE
} CATEGORY;
extern bool IsBinaryCoercible(Oid srctype, Oid targettype);
extern bool IsPreferredType(CATEGORY category, Oid type);
extern CATEGORY TypeCategory(Oid type);
extern Node *coerce_to_target_type(Node *expr, Oid exprtype,
Oid targettype, int32 targettypmod,
CoercionContext ccontext,
CoercionForm cformat);
extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *target_typeids,
CoercionContext ccontext);
extern Node *coerce_type(Node *node, Oid inputTypeId, Oid targetTypeId,
CoercionContext ccontext, CoercionForm cformat);
extern Node *coerce_type_constraints(Node *arg, Oid typeId,
CoercionForm cformat);
extern Node *coerce_to_boolean(Node *node, const char *constructName);
extern Oid select_common_type(List *typeids, const char *context);
extern Node *coerce_to_common_type(Node *node, Oid targetTypeId,
const char *context);
extern bool find_coercion_pathway(Oid targetTypeId, Oid sourceTypeId,
CoercionContext ccontext,
Oid *funcid);
extern Oid find_typmod_coercion_function(Oid typeId, int *nargs);
#endif /* PARSE_COERCE_H */
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