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Fixed LP bug #891953.

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Due to this bug the function SEL_IMERGE::or_sel_tree_with_checks()
could build an inconsistent merge tree if one of the SEL_TREEs in the
resulting index merge happened to contain a full key range.
This could trigger an assertion failure.
This commit is contained in:
Igor Babaev
2011-11-18 09:35:51 -08:00
parent fbb22ca4a7
commit 6ed9c13643
4 changed files with 42 additions and 1 deletions
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2
sql/opt_range.cc
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@ -1208,13 +1208,13 @@ int SEL_IMERGE::or_sel_tree_with_checks(RANGE_OPT_PARAM *param,
if (result)
{
result->keys_map= result_keys;
if (result_keys.is_clear_all())
result->type= SEL_TREE::ALWAYS;
if ((result->type == SEL_TREE::MAYBE) ||
(result->type == SEL_TREE::ALWAYS))
return 1;
/* SEL_TREE::IMPOSSIBLE is impossible here */
result->keys_map= result_keys;
*or_tree= result;
was_ored= TRUE;
}