[MDEV-8703] Wrong result for SELECT..WHERE LENGTH(decimal_10_1_column)!=3 AND decimal_10_1_column=1.10 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   

In this script:

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (a DECIMAL(10,1));
 
INSERT INTO t1 VALUES (1.1);
 
SELECT * FROM t1 WHERE LENGTH(a)!=3;
 
SELECT * FROM t1 WHERE LENGTH(a)!=3 AND a=1.10;

The first SELECT query correctly returns empty set, and 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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