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| author | Sergey Glukhov <Sergey.Glukhov@sun.com> | 2010-02-26 17:40:01 +0400 |
|---|---|---|
| committer | Sergey Glukhov <Sergey.Glukhov@sun.com> | 2010-02-26 17:40:01 +0400 |
| commit | ca6691533a7e2a454bbb614583a0058bf7acd2d2 (patch) | |
| tree | f0ae736e5674de5566766cbec76784fcfad888f9 /mysql-test/r/explain.result | |
| parent | fe229e33f7fdde3c5afe1c78522626562fcb4941 (diff) | |
| download | mariadb-git-ca6691533a7e2a454bbb614583a0058bf7acd2d2.tar.gz | |
Bug#47669 Query showed by EXPLAIN EXTENDED gives different result from original query
Item_field::print method does not take into
account fields whose values may be null.
The fix is to print 'NULL' if field value is null.
mysql-test/r/explain.result:
test case
mysql-test/r/func_str.result:
result fix
mysql-test/r/having.result:
result fix
mysql-test/r/select.result:
result fix
mysql-test/r/subselect.result:
result fix
mysql-test/r/union.result:
result fix
mysql-test/t/explain.test:
test case
sql/item.cc:
print 'NULL' if field value is null.
Diffstat (limited to 'mysql-test/r/explain.result')
| -rw-r--r-- | mysql-test/r/explain.result | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mysql-test/r/explain.result b/mysql-test/r/explain.result index 5a1bf1a1290..2bf85e35139 100644 --- a/mysql-test/r/explain.result +++ b/mysql-test/r/explain.result @@ -210,4 +210,19 @@ Error 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP colum Note 1003 select 1 AS `1` from `test`.`t1` where <not>(<exists>(...)) SET SESSION sql_mode=@old_sql_mode; DROP TABLE t1; +# +# Bug#47669: Query showed by EXPLAIN EXTENDED gives different result from original query +# +CREATE TABLE t1 (c int); +INSERT INTO t1 VALUES (NULL); +CREATE TABLE t2 (d int); +INSERT INTO t2 VALUES (NULL), (0); +EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1 +Note 1003 select (select 1 AS `1` from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from `test`.`t1` +DROP TABLE t1, t2; End of 5.1 tests. |