[MDEV-8742] Wrong result for SELECT..WHERE view_latin1_swedish_ci_field='a' COLLATE latin1_bin Created: 2015-09-03  Updated: 2015-09-12  Resolved: 2015-09-07

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: 10.0
Fix Version/s: 10.1.7

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Fixed Votes: 0
Labels: propagation, upstream-not-affected

Issue Links:
Blocks
blocks MDEV-8728 Fix a number of problems in equal fie... Closed

 Description    

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
 
INSERT INTO t1 VALUES ('a'),('A');
 
DROP VIEW IF EXISTS v1;
 
CREATE VIEW v1 AS SELECT * FROM t1 WHERE a='a';
 
SELECT * FROM v1 WHERE a=_latin1'a' COLLATE latin1_bin;

erroneously returns two rows:

+------+
 
| a    |
 
+------+
 
| a    |
 
| A    |
 
+------+

The expected result is to return on row only, with 'a' in lower case.
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