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| author | Sergei Golubchik <sergii@pisem.net> | 2010-10-20 12:58:43 +0200 |
|---|---|---|
| committer | Sergei Golubchik <sergii@pisem.net> | 2010-10-20 12:58:43 +0200 |
| commit | 60c15066db4f59e0362420d46a1ca5b6fbb30e56 (patch) | |
| tree | 5166c3c70edd2b9b16e13217b9ce13ab0ea6db8b /sql/sql_string.h | |
| parent | b56086cbbba28f7eca2278e5e51fca6ed857b47d (diff) | |
| download | mariadb-git-60c15066db4f59e0362420d46a1ca5b6fbb30e56.tar.gz | |
better fix for MySQL bugs
BUG#26447 prefer a clustered key for an index scan, as secondary index is always slower
... which was fixed to cause
BUG#35850 queries take 50% longer
... and was reverted
and
BUG#39653 prefer a secondary index for an index scan, as clustered key is always slower
... which was fixed to cause
BUG#55656 mysqldump takes six days instead of half an hour
... and was amended with a special case workaround
sql/opt_range.cc:
move get_index_only_read_time() into the handler class
sql/sql_select.cc:
use cost not an index length when choosing a cheaper index
Diffstat (limited to 'sql/sql_string.h')
0 files changed, 0 insertions, 0 deletions