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Fix up text concatenation so that it accepts all the reasonable cases that

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were accepted by prior Postgres releases.  This takes care of the loose end
left by the preceding patch to downgrade implicit casts-to-text.  To avoid
breaking desirable behavior for array concatenation, introduce a new
polymorphic pseudo-type "anynonarray" --- the added concatenation operators
are actually text || anynonarray and anynonarray || text.
This commit is contained in:
Tom Lane
2007-06-06 23:00:50 +00:00
parent 7dab4f75ca
commit 2d4db3675f
22 changed files with 301 additions and 109 deletions
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10
src/backend/executor/functions.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/functions.c,v 1.116 2007/04/27 22:05:47 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/functions.c,v 1.117 2007/06/06 23:00:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -849,9 +849,9 @@ ShutdownSQLFunction(Datum arg)
* to be sure that the user is returning the type he claims.
*
* For a polymorphic function the passed rettype must be the actual resolved
* output type of the function; we should never see ANYARRAY, ANYENUM or
* ANYELEMENT as rettype. (This means we can't check the type during function
* definition of a polymorphic function.)
* output type of the function; we should never see a polymorphic pseudotype
* such as ANYELEMENT as rettype. (This means we can't check the type during
* function definition of a polymorphic function.)
*
* This function returns true if the sql function returns the entire tuple
* result of its final SELECT, and false otherwise. Note that because we
@ -874,6 +874,8 @@ check_sql_fn_retval(Oid func_id, Oid rettype, List *queryTreeList,
char fn_typtype;
Oid restype;
AssertArg(!IsPolymorphicType(rettype));
if (junkFilter)
*junkFilter = NULL; /* default result */