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[SHOW] EXPLAIN UPDATE/DELETE, code re-structuring

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- Make query plan be re-saved after the first join execution
  (saving it after JOIN::cleanup is too late because EXPLAIN output 
   is currently produced before that)
- Handle QPF allocation/deallocation for edge cases, like unsuccessful
  BINLOG command.
- Work around the problem with UNION's direct subselects not being visible.
- Update test results ("Using temporary; Using filesort" are now always printed 
  last in the Extra column)
- This cset gets rid of memory leaks/crashes. Some result mismatches still remain.
This commit is contained in:
Sergey Petrunya
2013-06-27 16:41:12 +04:00
parent 99a8bfe68c
commit 8b7bbcf4dc
11 changed files with 68 additions and 18 deletions
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9
sql/sql_union.cc
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@ -617,6 +617,7 @@ bool st_select_lex_unit::exec()
ulonglong add_rows=0;
ha_rows examined_rows= 0;
DBUG_ENTER("st_select_lex_unit::exec");
bool was_executed= executed;
if (executed && !uncacheable && !describe)
DBUG_RETURN(FALSE);
@ -626,8 +627,8 @@ bool st_select_lex_unit::exec()
saved_error= optimize();
save_union_qpf(thd->lex->query_plan_footprint);
if (!was_executed && thd->lex->query_plan_footprint)
save_union_qpf(thd->lex->query_plan_footprint);
if (uncacheable || !item || !item->assigned() || describe)
{
@ -776,8 +777,8 @@ bool st_select_lex_unit::exec()
if (!fake_select_lex->ref_pointer_array)
fake_select_lex->n_child_sum_items+= global_parameters->n_sum_items;
save_union_qpf_part2(thd->lex->query_plan_footprint);
if (!was_executed && thd->lex->query_plan_footprint)
save_union_qpf_part2(thd->lex->query_plan_footprint);
saved_error= mysql_select(thd, &fake_select_lex->ref_pointer_array,
&result_table_list,