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MDEV-5117: Explain for a query executed as a PS is not written into the slow log

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- Save the query plan after the statement was executed so that its gets into
  the slow query log.
This commit is contained in:
Sergey Petrunya 2013-10-15 13:14:44 +04:00
commit 282ff783b1
1 changed files with 15 additions and 2 deletions
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17
sql/sql_prepare.cc
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@ -3931,8 +3931,21 @@ bool Prepared_statement::execute(String *expanded_query, bool open_cursor)
if (! cursor)
cleanup_stmt();
delete_explain_query(thd->lex);
/*
EXECUTE command has its own dummy "explain data". We don't need it,
instead, we want to keep the query plan of the statement that was
executed.
*/
if (!stmt_backup.lex->explain ||
!stmt_backup.lex->explain->have_query_plan())
{
delete_explain_query(stmt_backup.lex);
stmt_backup.lex->explain = thd->lex->explain;
thd->lex->explain= NULL;
}
else
delete_explain_query(thd->lex);
thd->set_statement(&stmt_backup);
thd->stmt_arena= old_stmt_arena;