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Proposed bugfix for #717

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Current table is placed into read_tables set of the current join_tab->select
so get_mm_parts function thinks that current table's record is read and
tries to calculate WHERE condition with the fields of the record.
Result of these calculations is unpredictable.
Looks funny - outcome of the SELECT depends on the queries executed before.

Anyway i think we should have testcase on this part of the code.
This commit is contained in:
hf@deer.(none)
2003-07-03 10:42:13 +05:00
parent 67b6ba21c3
commit 0cdf7f39af
3 changed files with 28 additions and 1 deletions
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2
sql/sql_select.cc
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@ -2683,7 +2683,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
(select->quick &&
(select->quick->records >= 100L)))) ?
2 : 1;
sel->read_tables= used_tables;
sel->read_tables= used_tables & ~current_map;
}
if (i != join->const_tables && tab->use_quick != 2)
{ /* Read with cache */