[MDEV-8704] Wrong result for SELECT..WHERE LENGTH(double_column)!=6 AND double_column=100e0 Created: 2015-08-30  Updated: 2015-09-12  Resolved: 2015-09-07

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: 5.5, 10.0, 10.1
Fix Version/s: 10.1.7

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Fixed Votes: 0
Labels: propagation, upstream

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 DOUBLE(9,2));
 
INSERT INTO t1 VALUES (100);
 
SELECT * FROM t1 WHERE LENGTH(a)!=6;
 
SELECT * FROM t1 WHERE LENGTH(a)!=6 AND a=100e0;

The first SELECT query correctly returns no rows, the second SELECT query erroneously returns one row.

 Comments   
Comment by Alexander Barkov [ 2015-09-12 ]

Repeatable in MySQL-5.7.8

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