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Allow functions returning void or cstring to appear in FROM clause,

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to make life cushy for the JDBC driver.  Centralize the decision-making
that affects this by inventing a get_type_func_class() function, rather
than adding special cases in half a dozen places.
This commit is contained in:
Tom Lane
2004-10-20 16:04:50 +00:00
parent 857e210ea9
commit fb22b32095
5 changed files with 94 additions and 55 deletions
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12
src/include/utils/lsyscache.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.90 2004/08/29 05:06:59 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/lsyscache.h,v 1.91 2004/10/20 16:04:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -24,6 +24,15 @@ typedef enum IOFuncSelector
IOFunc_send
} IOFuncSelector;
/* Type categories for get_type_func_class */
typedef enum TypeFuncClass
{
TYPEFUNC_SCALAR,
TYPEFUNC_COMPOSITE,
TYPEFUNC_RECORD,
TYPEFUNC_OTHER
} TypeFuncClass;
extern bool op_in_opclass(Oid opno, Oid opclass);
extern void get_op_opclass_properties(Oid opno, Oid opclass,
int *strategy, Oid *subtype,
@@ -85,6 +94,7 @@ extern char get_typstorage(Oid typid);
extern int32 get_typtypmod(Oid typid);
extern Node *get_typdefault(Oid typid);
extern char get_typtype(Oid typid);
extern TypeFuncClass get_type_func_class(Oid typid);
extern Oid get_typ_typrelid(Oid typid);
extern Oid get_element_type(Oid typid);
extern Oid get_array_type(Oid typid);