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

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- Merge with current 10.0-base
This commit is contained in:
Sergey Petrunya
2013-08-24 12:20:51 +04:00
parent f9c2b402f4 662bfed027
commit d2d9eb65e4
52 changed files with 2738 additions and 556 deletions
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7
sql/sql_union.cc
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@@ -620,6 +620,7 @@ 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);
@@ -629,6 +630,9 @@ bool st_select_lex_unit::exec()
saved_error= optimize();
if (!was_executed && thd->lex->query_plan_footprint)
save_union_qpf(thd->lex->query_plan_footprint);
if (uncacheable || !item || !item->assigned() || describe)
{
for (SELECT_LEX *sl= select_cursor; sl; sl= sl->next_select())
@@ -775,6 +779,9 @@ 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;
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,