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Post-push fix to disable a subset of the test case for Bug#47762.

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This has been back-ported from 6.0 as the problems proved to afflict 
5.1 as well.
The fix exposed two new bugs. They were reported as follows.
      
Bug no 52174: Sometimes wrong plan when reading a MAX value 
from non-NULL index
      
Bug no 52173: Reading NULL value from non-NULL index gives wrong 
result in embedded server 
      
Both bugs taken together affect a much smaller class of queries than #47762, 
so the fix stays for now.
This commit is contained in:
Martin Hansson
2010-03-19 09:23:44 +01:00
parent 879b705342
commit d03133dccf
3 changed files with 26 additions and 8 deletions
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4
mysql-test/include/min_null_cond.inc
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@ -18,11 +18,13 @@ EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a < NULL;
SELECT MIN( a ) FROM t1 WHERE a < NULL;
if (!$skip_null_safe_test)
{
--replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
SELECT MIN( a ) FROM t1 WHERE a <=> NULL;
}
--replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x
EXPLAIN
SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10;