How to inhibit that subquery merging behavior 2004-07-16 - By Jonathan Gennick
Wolfgang,
I can reproduce the error:
SQL > SELECT *
2 FROM ( SELECT flag, TO_NUMBER(num) num
3 FROM subtest
4 WHERE flag IN ( 'A ', 'C ') )
5 WHERE num > 0;
ERROR:
ORA-01722 (See ORA-01722.ora-code.com): invalid number
However, I can 't find a hint that will prevent the merging
of the subquery. I 've tried Tanel 's suggestions:
SQL > SELECT /*+ NO_MERGE(sub) NO_PUSH_PRED(sub) PUSH_SUBQ(sub) */ *
2 FROM ( SELECT flag, TO_NUMBER(num) num
3 FROM subtest
4 WHERE flag IN ( 'A ', 'C ') ) sub
5 WHERE num > 0;
ERROR:
ORA-01722 (See ORA-01722.ora-code.com): invalid number
I 've also tried putting the hints into the subquery:
SQL > SELECT *
2 FROM ( SELECT /*+ NO_MERGE NO_PUSH_PRED PUSH_SUBQ */
3 flag, TO_NUMBER(num) num
4 FROM subtest
5 WHERE flag IN ( 'A ', 'C ') ) sub
6 WHERE num > 0;
ERROR:
ORA-01722 (See ORA-01722.ora-code.com): invalid number
Is there a hint that will prevent the queries from being
merged?
Best regards,
Jonathan Gennick --- Brighten the corner where you are
http://Gennick.com * 906.387.1698 * mailto:jonathan@(protected)
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