[MCOL-4601] MOD and DIV operators not behaving as InnoDB Created: 2021-03-11  Updated: 2023-07-02

Status: Open
Project: MariaDB ColumnStore
Component/s: PrimProc
Affects Version/s: 5.5.1, 5.6.1, 6.1.1
Fix Version/s: Icebox

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: beginner-friendly

Issue Links:
Relates
relates to MCOL-4361 Replace pow(10.0, (double)scale) expr... Closed
relates to MCOL-641 Full DECIMAL support in ColumnStore Closed

 Description   

DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a DECIMAL(10,2)) ENGINE=ColumnStore;
INSERT INTO t1 VALUES (1.21),(12.1);
SELECT a, a MOD 1.1, a DIV 1.1 FROM t1;

+-------+-----------+
| a     | a MOD 1.1 |
+-------+-----------+
|  1.21 |      0.21 |
| 12.10 |      0.10 |
+-------+-----------+

Looks wrong. The expected result is:

DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a DECIMAL(10,2)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1.21),(12.1);
SELECT a, a MOD 1.1, a DIV 1.1 FROM t1;

+-------+-----------+
| a     | a MOD 1.1 |
+-------+-----------+
|  1.21 |      0.11 |
| 12.10 |      0.00 |
+-------+-----------+


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