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Fixed the bug mdev-13710.

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This patch corrects the code of the patch for mdev-13369 that
introduced the splitting technique when using materialized
derived tables / views with GROUP BY. The second actual parameters
of the call of the method JOIN::reoptimize() in the function
JOIN::push_splitting_cond_into_derived() was calculated incorrectly.
This could cause different failures for queries using derived tables
or views with GROUP BY when their FROM lists contained empty or
single-row tables.
This commit is contained in:
Igor Babaev
2017-09-09 20:35:05 -07:00
parent 5e4aa1a2f8
commit 61074d0426
3 changed files with 40 additions and 4 deletions
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6
sql/sql_select.cc
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@ -9073,12 +9073,10 @@ bool JOIN::push_splitting_cond_into_derived(THD *thd, Item *cond)
{
enum_reopt_result reopt_result= REOPT_NONE;
table_map all_table_map= 0;
for (JOIN_TAB *tab= join_tab + const_tables;
for (JOIN_TAB *tab= join_tab;
tab < join_tab + top_join_tab_count; tab++)
{
all_table_map|= tab->table->map;
}
reopt_result= reoptimize(cond, all_table_map, NULL);
reopt_result= reoptimize(cond, all_table_map & ~const_table_map, NULL);
if (reopt_result == REOPT_ERROR)
return true;
if (inject_cond_into_where(cond))