[MCOL-4421] Add TIME_ROUND_FRACTIONAL support in ColumnStore Created: 2020-11-28  Updated: 2023-07-01

Status: Open
Project: MariaDB ColumnStore
Component/s: PrimProc
Affects Version/s: 5.4.3
Fix Version/s: 23.10

Type: Task Priority: Major
Reporter: Alexander Barkov Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: datatype

Issue Links:
Relates
relates to MDEV-16991 Rounding vs truncation for TIME, DATE... Closed

 Description   

ColumnStore currently ignores sql_mode=TIME_ROUND_FRACTIONAL:

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (a DECIMAL(10,7)) ENGINE=ColumnStore;
 
INSERT INTO t1 VALUES (1.0000006);
 
SET sql_mode=TIME_ROUND_FRACTIONAL;
 
SELECT CAST(a AS TIME(6)) FROM t1;


+--------------------+
 
| CAST(a AS TIME(6)) |
 
+--------------------+
 
| 00:00:01.000000    |
 
+--------------------+

The expected result should be:

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (a DECIMAL(10,7)) ENGINE=MyISAM;
 
INSERT INTO t1 VALUES (1.0000006);
 
SET sql_mode=TIME_ROUND_FRACTIONAL;
 
SELECT CAST(a AS TIME(6)) FROM t1;


+--------------------+
 
| CAST(a AS TIME(6)) |
 
+--------------------+
 
| 00:00:01.000001    |
 
+--------------------+


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