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Add support for user-defined I/O conversion casts.

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This commit is contained in:
Heikki Linnakangas
2008-10-31 08:39:22 +00:00
parent 34e37d58ed
commit 092bc49653
14 changed files with 396 additions and 269 deletions
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24
src/backend/parser/parse_coerce.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.170 2008/10/25 17:19:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.171 2008/10/31 08:39:21 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@ -1909,11 +1909,23 @@ find_coercion_pathway(Oid targetTypeId, Oid sourceTypeId,
/* Rely on ordering of enum for correct behavior here */
if (ccontext >= castcontext)
{
*funcid = castForm->castfunc;
if (OidIsValid(*funcid))
result = COERCION_PATH_FUNC;
else
result = COERCION_PATH_RELABELTYPE;
switch (castForm->castmethod)
{
case COERCION_METHOD_FUNCTION:
result = COERCION_PATH_FUNC;
*funcid = castForm->castfunc;
break;
case COERCION_METHOD_INOUT:
result = COERCION_PATH_COERCEVIAIO;
break;
case COERCION_METHOD_BINARY:
result = COERCION_PATH_RELABELTYPE;
break;
default:
elog(ERROR, "unrecognized castmethod: %d",
(int) castForm->castmethod);
break;
}
}
ReleaseSysCache(tuple);