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Make semi-joins work with outer joins:

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- evaluate_null_complemented_join_record() should perform FirstMatch checks.
This commit is contained in:
Sergey Petrunya
2011-06-22 15:22:27 +04:00
parent eea95a15d3
commit ed54ec7eb5
4 changed files with 37 additions and 0 deletions
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9
sql/sql_select.cc
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@@ -15220,6 +15220,15 @@ evaluate_null_complemented_join_record(JOIN *join, JOIN_TAB *join_tab)
else if (res == 1)
return NESTED_LOOP_OK;
}
else if (join_tab->do_firstmatch)
{
/*
We should return to the join_tab->do_firstmatch after we have
enumerated all the suffixes for current prefix row combination
*/
if (join_tab->do_firstmatch < join->return_tab)
join->return_tab= join_tab->do_firstmatch;
}
/*
Send the row complemented by nulls to be joined with the