[MDEV-9417] "CREATE TABLE t1 SELECT int_sp_argument" produces a too large column Created: 2016-01-14  Updated: 2023-04-27

Status: Open
Project: MariaDB Server
Component/s: Data types
Affects Version/s: 10.1, 10.2
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-4912 Data type plugin API version 1 Closed
Epic Link: Data type cleanups

 Description    

DROP TABLE IF EXISTS t1;
 
DROP PROCEDURE IF EXISTS p1;
 
CREATE PROCEDURE p1(a INT) CREATE TABLE t1 SELECT a;
 
CALL p1(1);
 
DESC t1;

returns

+-------+------------+------+-----+---------+-------+
 
| Field | Type       | Null | Key | Default | Extra |
 
+-------+------------+------+-----+---------+-------+
 
| a     | bigint(11) | YES  |     | NULL    |       |
 
+-------+------------+------+-----+---------+-------+

int(11) would be enough.

 Comments   
Comment by Alexander Barkov [ 2016-01-14 ]

A similar problem:

CREATE OR REPLACE TABLE t1 (a int);
 
CREATE OR REPLACE VIEW v1 AS SELECT COALESCE(a) AS a FROM t1;
 
DESC v1;

returns

+-------+------------+------+-----+---------+-------+
 
| Field | Type       | Null | Key | Default | Extra |
 
+-------+------------+------+-----+---------+-------+
 
| a     | bigint(11) | YES  |     | NULL    |       |
 
+-------+------------+------+-----+---------+-------+

int(11) should be ok.

Comment by Alexander Barkov [ 2016-01-14 ]

A similar problem:

CREATE OR REPLACE TABLE t1 AS SELECT 999999999 AS a,2147483647 AS b;

returns

+-------+------------+------+-----+---------+-------+
 
| Field | Type       | Null | Key | Default | Extra |
 
+-------+------------+------+-----+---------+-------+
 
| a     | int(9)     | NO   |     | NULL    |       |
 
| b     | bigint(10) | NO   |     | NULL    |       |
 
+-------+------------+------+-----+---------+-------+

int(10) for b should be enough.

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