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Fix for lp:780425 sql_buffer_result=1 gives wrong result for GROUP BY with a +# constant expression"

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mysql-test/r/select.result:
  Test case for lp:780425
mysql-test/r/select_pkeycache.result:
  lp:780425
mysql-test/t/select.test:
  lp:780425
sql/sql_select.cc:
  Added DBUG_ASSERT to be prove some logic and later be able to simplify the code
  Set implicit_grouping if we delete a GROUP BY to signal do_select() that a grouping needs to be done.
This commit is contained in:
Michael Widenius
2011-11-15 13:14:54 +02:00
parent b5d41c1c11
commit ef45b79924
4 changed files with 75 additions and 0 deletions
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4
sql/sql_select.cc
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@ -1295,7 +1295,10 @@ JOIN::optimize()
DBUG_RETURN(1);
}
if (old_group_list && !group_list)
{
DBUG_ASSERT(group);
select_distinct= 0;
}
}
if (!group_list && group)
{
@ -1303,6 +1306,7 @@ JOIN::optimize()
simple_order=1;
select_distinct= 0; // No need in distinct for 1 row
group_optimized_away= 1;
implicit_grouping= TRUE;
}
calc_group_buffer(this, group_list);