* Routines for type coercion.
*
*
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2010, 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 $
+ * src/include/parser/parse_coerce.h
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_COERCE_H
#define PARSE_COERCE_H
-#include "catalog/pg_type.h"
#include "parser/parse_node.h"
-typedef enum CATEGORY
+
+/* Type categories (see TYPCATEGORY_xxx symbols in catalog/pg_type.h) */
+typedef char TYPCATEGORY;
+
+/* Result codes for find_coercion_pathway */
+typedef enum CoercionPathType
{
- INVALID_TYPE,
- UNKNOWN_TYPE,
- BOOLEAN_TYPE,
- STRING_TYPE,
- BITSTRING_TYPE,
- NUMERIC_TYPE,
- DATETIME_TYPE,
- TIMESPAN_TYPE,
- GEOMETRIC_TYPE,
- NETWORK_TYPE,
- USER_TYPE
-} CATEGORY;
+ COERCION_PATH_NONE, /* failed to find any coercion pathway */
+ COERCION_PATH_FUNC, /* apply the specified coercion function */
+ COERCION_PATH_RELABELTYPE, /* binary-compatible cast, no function */
+ COERCION_PATH_ARRAYCOERCE, /* need an ArrayCoerceExpr node */
+ COERCION_PATH_COERCEVIAIO /* need a CoerceViaIO node */
+} CoercionPathType;
extern bool IsBinaryCoercible(Oid srctype, Oid targettype);
-extern bool IsPreferredType(CATEGORY category, Oid type);
-extern CATEGORY TypeCategory(Oid type);
+extern bool IsPreferredType(TYPCATEGORY category, Oid type);
+extern TYPCATEGORY TypeCategory(Oid type);
-extern Node *coerce_to_target_type(Node *expr, Oid exprtype,
- Oid targettype, int32 targettypmod,
- CoercionContext ccontext,
- CoercionForm cformat);
+extern Node *coerce_to_target_type(ParseState *pstate,
+ Node *expr, Oid exprtype,
+ Oid targettype, int32 targettypmod,
+ CoercionContext ccontext,
+ CoercionForm cformat,
+ int location);
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);
+ CoercionContext ccontext);
+extern Node *coerce_type(ParseState *pstate, Node *node,
+ Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
+ CoercionContext ccontext, CoercionForm cformat, int location);
+extern Node *coerce_to_domain(Node *arg, Oid baseTypeId, int32 baseTypeMod,
+ Oid typeId,
+ CoercionForm cformat, int location,
+ bool hideInputCoercion,
+ bool lengthCoercionDone);
-extern Node *coerce_to_boolean(Node *node, const char *constructName);
+extern Node *coerce_to_boolean(ParseState *pstate, Node *node,
+ const char *constructName);
+extern Node *coerce_to_specific_type(ParseState *pstate, Node *node,
+ Oid targetTypeId,
+ const char *constructName);
-extern Oid select_common_type(List *typeids, const char *context);
-extern Node *coerce_to_common_type(Node *node, Oid targetTypeId,
+extern int parser_coercion_errposition(ParseState *pstate,
+ int coerce_location,
+ Node *input_expr);
+
+extern Oid select_common_type(ParseState *pstate, List *exprs,
+ const char *context, Node **which_expr);
+extern Node *coerce_to_common_type(ParseState *pstate, 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);
+extern bool check_generic_type_consistency(Oid *actual_arg_types,
+ Oid *declared_arg_types,
+ int nargs);
+extern Oid enforce_generic_type_consistency(Oid *actual_arg_types,
+ Oid *declared_arg_types,
+ int nargs,
+ Oid rettype,
+ bool allow_poly);
+extern Oid resolve_generic_type(Oid declared_type,
+ Oid context_actual_type,
+ Oid context_declared_type);
+
+extern CoercionPathType find_coercion_pathway(Oid targetTypeId,
+ Oid sourceTypeId,
+ CoercionContext ccontext,
+ Oid *funcid);
+extern CoercionPathType find_typmod_coercion_function(Oid typeId,
+ Oid *funcid);
#endif /* PARSE_COERCE_H */