* Routines for type coercion.
*
*
- * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/parser/parse_coerce.h,v 1.66 2006/10/04 00:30:09 momjian Exp $
+ * src/include/parser/parse_coerce.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,
- GENERIC_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(ParseState *pstate,
Node *expr, Oid exprtype,
Oid targettype, int32 targettypmod,
CoercionContext ccontext,
- CoercionForm cformat);
+ CoercionForm cformat,
+ int location);
extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *target_typeids,
CoercionContext ccontext);
extern Node *coerce_type(ParseState *pstate, Node *node,
Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
- CoercionContext ccontext, CoercionForm cformat);
+ CoercionContext ccontext, CoercionForm cformat, int location);
extern Node *coerce_to_domain(Node *arg, Oid baseTypeId, int32 baseTypeMod,
Oid typeId,
- CoercionForm cformat, bool hideInputCoercion,
+ CoercionForm cformat, int location,
+ bool hideInputCoercion,
bool lengthCoercionDone);
extern Node *coerce_to_boolean(ParseState *pstate, Node *node,
const char *constructName);
-extern Node *coerce_to_integer(ParseState *pstate, Node *node,
- const char *constructName);
-extern Node *coerce_to_bigint(ParseState *pstate, Node *node,
- const char *constructName);
+extern Node *coerce_to_specific_type(ParseState *pstate, Node *node,
+ Oid targetTypeId,
+ const char *constructName);
+
+extern int parser_coercion_errposition(ParseState *pstate,
+ int coerce_location,
+ Node *input_expr);
-extern Oid select_common_type(List *typeids, const char *context);
+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 Oid enforce_generic_type_consistency(Oid *actual_arg_types,
Oid *declared_arg_types,
int nargs,
- Oid rettype);
+ Oid rettype,
+ bool allow_poly);
extern Oid resolve_generic_type(Oid declared_type,
Oid context_actual_type,
Oid context_declared_type);
-extern bool find_coercion_pathway(Oid targetTypeId, Oid sourceTypeId,
+extern CoercionPathType find_coercion_pathway(Oid targetTypeId,
+ Oid sourceTypeId,
CoercionContext ccontext,
Oid *funcid);
-extern Oid find_typmod_coercion_function(Oid typeId);
+extern CoercionPathType find_typmod_coercion_function(Oid typeId,
+ Oid *funcid);
#endif /* PARSE_COERCE_H */