Comments on: Closed database and WITH subquery http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/ Oracle troubleshooting, internals and performance tuning Sat, 13 Mar 2010 00:19:38 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Tanel Poder http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-2223 Tanel Poder Mon, 27 Jul 2009 10:39:20 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-2223 that query doesnt work as shown above that query doesnt work as shown above

]]> By: hashim http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-2222 hashim Mon, 27 Jul 2009 10:30:29 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-2222 with subquery as (select /*+ inline */ ‘blah’ x from dual) select * from subquery; with subquery as (select /*+ inline */ ‘blah’ x from dual) select * from subquery;

]]> By: tanelp http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-462 tanelp Tue, 22 Jul 2008 14:27:14 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-462 Hi Nilendu, Did you test out your claims first? SQL> with subquery as (select /*+ inline */ 'blah' x from dual) select * from subquery; with subquery as (select /*+ inline */ 'blah' x from dual) select * from subquery * ERROR at line 1: ORA-01219: database not open: queries allowed on fixed tables/views only This error is not due view materialization into GTT, if it was the error message would have been different as well. Hi Nilendu,

Did you test out your claims first?

SQL> with subquery as (select /*+ inline */ ‘blah’ x from dual) select * from subquery;
with subquery as (select /*+ inline */ ‘blah’ x from dual) select * from subquery
*
ERROR at line 1:
ORA-01219: database not open: queries allowed on fixed tables/views only

This error is not due view materialization into GTT, if it was the error message would have been different as well.

]]> By: Nilendu http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-463 Nilendu Fri, 18 Jul 2008 05:24:19 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-463 Oops! I mean -- SQL> with subquery as (select /*+ inline */ 'blah' x from dual) select * from subquery; Oops! I mean –

SQL> with subquery as (select /*+ inline */ ‘blah’ x from dual) select * from subquery;

]]> By: Nilendu http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-464 Nilendu Fri, 18 Jul 2008 05:21:52 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-464 This is because Oracle is trying to build a global temporary table with database still not open. Try this hint, this should work -- SQL> with /*+ inline */ subquery as (select 'blah' x from dual) select * from subquery; This is because Oracle is trying to build a global temporary table with database still not open.

Try this hint, this should work –

SQL> with /*+ inline */ subquery as (select ‘blah’ x from dual) select * from subquery;

]]> By: tanelp http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-469 tanelp Wed, 16 Jul 2008 07:02:27 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-469 Yep it looks like the DUAL -> X$DUAL replacement is done only in the main query body and not in the factored subquery. This for example works: SQL> with x$dual as (select 1 x from v$instance) select * from x$dual; X ---------- 1 These two work ok too: SQL> select * from (select * from dual); ADDR INDX INST_ID D -------- ---------- ---------- - 0C60FA34 0 1 X SQL> select * from dual where dummy in (select dummy from dual); ADDR INDX INST_ID D -------- ---------- ---------- - 0C60FA34 0 1 X So it looks like this issue is specific to subquery factoring. Yep it looks like the DUAL -> X$DUAL replacement is done only in the main query body and not in the factored subquery.

This for example works:

SQL> with x$dual as (select 1 x from v$instance) select * from x$dual;

X
———-
1

These two work ok too:

SQL> select * from (select * from dual);

ADDR INDX INST_ID D
——– ———- ———- -
0C60FA34 0 1 X

SQL> select * from dual where dummy in (select dummy from dual);

ADDR INDX INST_ID D
——– ———- ———- -
0C60FA34 0 1 X

So it looks like this issue is specific to subquery factoring.

]]> By: laurentschneider http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-468 laurentschneider Wed, 16 Jul 2008 05:13:42 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-468 yes, quite special :) SQL> with x$dual as (select '1' from dual) select * from x$dual; ORA-32031: illegal reference of a query name in WITH clause yes, quite special :)

SQL> with x$dual as (select ‘1′ from dual) select * from x$dual;
ORA-32031: illegal reference of a query name in WITH clause

]]> By: tanelp http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-467 tanelp Tue, 15 Jul 2008 10:22:32 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-467 DUAL is another special case btw, when you select from it when DB is closed, then internally the name is converted to X$DUAL.. DUAL is another special case btw, when you select from it when DB is closed, then internally the name is converted to X$DUAL..

]]> By: tanelp http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-466 tanelp Tue, 15 Jul 2008 10:21:44 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-466 yep, as DUAL table name is not in the hardcoded fixed table list. If you replace DUAL with X$DUAL in your query, it works. yep, as DUAL table name is not in the hardcoded fixed table list. If you replace DUAL with X$DUAL in your query, it works.

]]> By: laurentschneider http://blog.tanelpoder.com/2008/07/14/closed-database-and-with-subquery/comment-page-1/#comment-465 laurentschneider Tue, 15 Jul 2008 09:52:18 +0000 http://tanelpoder.wordpress.com/2008/07/14/closed-database-and-with-subquery/#comment-465 Fun, but it works only in one direction :mrgreen: <code>with dual as (select 'x' from v$instance) select * from dual; with dual as (select 'x' from v$instance) select * from dual * ERROR at line 1: ORA-32035: unreferenced query name defined in WITH clause </code> Fun, but it works only in one direction :mrgreen:

with dual as (select 'x' from v$instance) select * from dual;
with dual as (select 'x' from v$instance) select * from dual
*
ERROR at line 1:
ORA-32035: unreferenced query name defined in WITH clause

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