diff --git a/mysql-test/r/explain.result b/mysql-test/r/explain.result index b8db8b53e06..8f2d704b312 100644 --- a/mysql-test/r/explain.result +++ b/mysql-test/r/explain.result @@ -226,4 +226,16 @@ Warnings: Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1 Note 1003 select (select 1 from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from `test`.`t1` DROP TABLE t1, t2; +# +# Bug #48419: another explain crash.. +# +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (b BLOB, KEY b(b(100))); +INSERT INTO t2 VALUES ('1'), ('2'), ('3'); +FLUSH TABLES; +EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +DROP TABLE t1, t2; End of 5.1 tests. diff --git a/mysql-test/r/ps.result b/mysql-test/r/ps.result index cf08d763e5c..84b9cdf930c 100644 --- a/mysql-test/r/ps.result +++ b/mysql-test/r/ps.result @@ -155,24 +155,24 @@ execute stmt1 ; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 6 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table -5 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found -4 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found +5 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +4 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables execute stmt1 ; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 6 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table -5 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found -4 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found +5 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +4 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 6 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table -5 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found -4 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found +5 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +4 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables deallocate prepare stmt1; diff --git a/mysql-test/t/explain.test b/mysql-test/t/explain.test index 3c2f7bbbe96..ba6be72dbdc 100644 --- a/mysql-test/t/explain.test +++ b/mysql-test/t/explain.test @@ -198,4 +198,19 @@ INSERT INTO t2 VALUES (NULL), (0); EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1; DROP TABLE t1, t2; + +--echo # +--echo # Bug #48419: another explain crash.. +--echo # + +CREATE TABLE t1 (a INT); +CREATE TABLE t2 (b BLOB, KEY b(b(100))); +INSERT INTO t2 VALUES ('1'), ('2'), ('3'); + +FLUSH TABLES; + +EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a); + +DROP TABLE t1, t2; + --echo End of 5.1 tests. diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 545f1cb6636..c8c23e9a602 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -1107,8 +1107,7 @@ JOIN::optimize() } if (conds && const_table_map != found_const_table_map && - (select_options & SELECT_DESCRIBE) && - select_lex->master_unit() == &thd->lex->unit) // upper level SELECT + (select_options & SELECT_DESCRIBE)) { conds=new Item_int((longlong) 0,1); // Always false }