At file:///home/igor/maria/maria-5.3-bug707827/
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revno: 2896
revision-id: igor@xxxxxxxxxxxx-20110128052302-09617460yxj1kck7
parent: igor@xxxxxxxxxxxx-20110127044523-9kvx1t3x3166hjyr
committer: Igor Babaev<igor@xxxxxxxxxxxx>
branch nick: maria-5.3-bug707827
timestamp: Thu 2011-01-27 21:23:02 -0800
message:
Fixed LP bug #707827.
This bug could manifest itself when hash join over a varchar column
with NULL values in some rows was used. It happened because the
function key_buf_cmp erroneously returned FALSE when one of the joined
key fields was null while the second was not.
Also fixed two other bugs in the functions key_hashnr and key_buf_cmp
that could possibly lead to wrong results for some queries that
used hash join over several columns with nulls.
Also reverted the latest addition of the test case for bug #45092. It
had been already backported earlier.
