sergefp@mysql.com 54a713aac5 BUG#8804: wrong results for NULL IN (SELECT ...) ...

Evaluate "NULL IN (SELECT ...)" in a special way: Disable pushed-down 
conditions and their "consequences": 
 = Do full table scans instead of unique_[index_subquery] lookups.
 = Change appropriate "ref_or_null" accesses to full table scans in
   subquery's joins.
Also cache value of NULL IN (SELECT ...) if the SELECT is not correlated 
wrt any upper select.

2006-10-31 20:51:09 +03:00

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