[MCOL-4628] SET double_col=decimal_col returns an error Created: 2021-03-22  Updated: 2023-07-02

Status: Open
Project: MariaDB ColumnStore
Component/s: PrimProc
Affects Version/s: 5.6.1, 6.1.1
Fix Version/s: Icebox

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

Issue Links:
Blocks
blocks MCOL-4755 Allow joins on all numeric data type ... Open
Relates
relates to MCOL-4622 Implicit FLOAT->INT and DOUBLE->INT c... Open
relates to MCOL-4627 SET int_col=decimal_col returns an error Open
relates to MCOL-641 Full DECIMAL support in ColumnStore Closed
relates to MCOL-4361 Replace pow(10.0, (double)scale) expr... Closed

 Description    

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (i INT, d DOUBLE) ENGINE=ColumnStore;
 
INSERT INTO t1 VALUES (0, 1.5);
 
UPDATE t1 SET i=d;


ERROR 1264 (22003): CAL0002: IDB-2025: Data truncated for column 'i'

Looks wrong. It should round double to int without errors, like InnoDB does:

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (i INT, d DOUBLE) ENGINE=InnoDB;
 
INSERT INTO t1 VALUES (0, 1.5);
 
UPDATE t1 SET i=d;
 
SELECT * FROM t1;


+------+------+
 
| i    | d    |
 
+------+------+
 
|    2 |  1.5 |
 
+------+------+

Note, the same problem is also repeatable for the FLOAT data type.
Generated at Thu Feb 08 02:51:47 UTC 2024 using Jira 8.20.16#820016-sha1:9d11dbea5f4be3d4cc21f03a88dd11d8c8687422.