[MDEV-332] lp:1010729 Unexpected syntax error for a query with UNION of left joins Created: 2012-06-11  Updated: 2012-06-14  Resolved: 2012-06-14

Status: Closed
Project: MariaDB Server
Component/s: None
Affects Version/s: 5.5.24
Fix Version/s: 5.5.25

Type: Bug Priority: Major
Reporter: Sergei Golubchik Assignee: Igor Babaev
Resolution: Fixed Votes: 0
Labels: None


 Description   

The following sequence of commands gives us an unexpected error message in MariaDB 5.5:

CREATE TABLE t1 (a int);
 
CREATE TABLE t2 (b int);
 
CREATE TABLE t3 (c int);
 
SELECT a FROM t1 UNION SELECT b FROM t2 JOIN (t3) ON ( t2.b = t3.c );
 

MariaDB [test]> SELECT a FROM t1 UNION SELECT b FROM t2 JOIN (t3) ON ( t2.b = t3.c );
 
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ON ( t2.b = t3.c )' at line 1

If we exchange SELECT clauses in the above UNION the query will be accepted though:

MariaDB [test]> SELECT b FROM t2 JOIN (t3) ON ( t2.b = t3.c ) UNION SELECT a FROM t1;
 
Empty set (0.00 sec)

The versions MariaDB 5.2/5.3 are not affected, while mysql-5.5 is affected: see http://bugs.mysql.com/bug.php?id=54382

 Comments   
Comment by Sergei Petrunia [ 2012-06-14 ]

This was fixed and pushed.

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