Bug #79505 "if(1,1,1.234)" return 1 while the "Decimals" is 3

Submitted: 3 Dec 2015 10:57 Modified: 3 Dec 2015 12:07
Reporter: Su Dylan Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: DML Severity:S3 (Non-critical)
Version:5.7.8, 5.5.48, 5.6.29, 5.7.9 OS:Any
Assigned to: CPU Architecture:Any

[3 Dec 2015 10:57] Su Dylan 
Description:
Output:
=======
mysql> select if(1,1,1.234);
Field   1:  `if(1,1,1.234)`
Catalog:    `def`
Database:   ``
Table:      ``
Org_table:  ``
Type:       NEWDECIMAL
Collation:  binary (63)
Length:     6
Max_length: 1
Decimals:   3
Flags:      NOT_NULL BINARY

+---------------+
| if(1,1,1.234) |
+---------------+
|             1 |
+---------------+
1 row in set (0.00 sec)

Problem:
========
The displayed "Decimals" is 3, while the result gives "1", with no decimal appended.

How to repeat:
select if(1,1,1.234);

Suggested fix:
"if(1,1,1.234)" is expected to return 1.000.
[3 Dec 2015 12:01] Peter Laursen 
MySQL 5.6 also returns  "1" whilst MariaDB 10.1 returns "1.000".

-- Peter
-- not a MySQL/Oracle or MariaDB person
[3 Dec 2015 12:07] MySQL Verification Team 
Hello Su Dylan,

Thank you for the report.

Thanks,
Umesh

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