diff options
| author | unknown <gkodinov/kgeorge@magare.gmz> | 2008-05-16 17:05:55 +0300 |
|---|---|---|
| committer | unknown <gkodinov/kgeorge@magare.gmz> | 2008-05-16 17:05:55 +0300 |
| commit | 0fb1527e9556940d30ab14b11742c03510db081d (patch) | |
| tree | fa9c710bb7a7cf881050ea378fbd7bf5e1c32e83 /sql/sql_select.cc | |
| parent | 21c07eb7b5f970d10aa2ce961a901ba78358125e (diff) | |
| download | mariadb-git-0fb1527e9556940d30ab14b11742c03510db081d.tar.gz | |
Bug #36011: server crash with explain extended on query
with dependent subqueries
An IN subquery is executed on EXPLAIN when it's not correlated.
If the subquery required a temporary table for its execution
not all the internal structures were restored from pointing to
the items of the temporary table to point back to the items of
the subquery.
Fixed by restoring the ref array when a temp tables were used in
executing the IN subquery during EXPLAIN EXTENDED.
mysql-test/r/subselect.result:
Bug #36011: test case
mysql-test/t/subselect.test:
Bug #36011: test case
sql/sql_select.cc:
Bug #36011: restore the ref array after execution
when there were temp tables.
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 11062998e6a..d1e5837329b 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -2104,11 +2104,12 @@ JOIN::exec() /* With EXPLAIN EXTENDED we have to restore original ref_array for a derived table which is always materialized. - Otherwise we would not be able to print the query correctly. + We also need to do this when we have temp table(s). + Otherwise we would not be able to print the query correctly. */ - if (items0 && - (thd->lex->describe & DESCRIBE_EXTENDED) && - select_lex->linkage == DERIVED_TABLE_TYPE) + if (items0 && (thd->lex->describe & DESCRIBE_EXTENDED) && + (select_lex->linkage == DERIVED_TABLE_TYPE || + exec_tmp_table1 || exec_tmp_table2)) set_items_ref_array(items0); DBUG_VOID_RETURN; |