[MDEV-15930] Wrong field type for CAST(decimal_column AS [UN]SIGNED) Created: 2018-04-19  Updated: 2023-04-27

Status: Open
Project: MariaDB Server
Component/s: Data types
Affects Version/s: 5.5, 10.0, 10.1, 10.2, 10.3
Fix Version/s: 10.4

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Unresolved Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-13232 Assertion `(&(&share->intern_lock)->m... Closed
Epic Link: Data type cleanups

 Description    

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 AS SELECT
 
  CAST(1.1111111111 AS SIGNED) AS c1,
 
  CAST(1.1111111111 AS UNSIGNED) AS c2;
 
DESC t1;


+-------+---------------------+------+-----+---------+-------+
 
| Field | Type                | Null | Key | Default | Extra |
 
+-------+---------------------+------+-----+---------+-------+
 
| c1    | bigint(13)          | NO   |     | NULL    |       |
 
| c2    | bigint(20) unsigned | NO   |     | NULL    |       |
 
+-------+---------------------+------+-----+---------+-------+

Looks wrong:

  • the data type is wrong. It should be int instead of bigint
  • the length is too large. It should be around 1.
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