3800 Venkata Sidagam 2012-05-08 [merge]
Null merge from mysql-5.5 to mysql-trunk
3799 Jorgen Loland 2012-05-08
Bug#13970015: ASSERT `MIN_ENDP || MAX_ENDP' FAILED IN
When key_or() finds that two SEL_ARG trees form a full range
(no upper or lower bound in the range; is always true), NULL
is returned. In most cases the range optimizer then forgets
about these trees, but when the trees belong to two different
SEL_TREEs used in an index merge the always true range is only
removed from one of the SEL_TREEs.
Index merge is a disjunct operation, meaning that the rows
read from the different indexes shall be ORed. If the
predicate for one of the indexes is always true then index
merge range access will effectively fetch all rows from the
table. Range access in this case is not a good idea.
No bundle (reason: useless for push emails).
|• bzr push into mysql-trunk branch (venkata.sidagam:3799 to 3800) ||Venkata Sidagam||8 May|