Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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N/A
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None
Description
VECTOR column can be created as null-able, with NULL for a default value:
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bb-11.6-MDEV-32887-vector 764592a4da2a1b490471732fbefe2ce745ce1f32 |
MariaDB [test]> create or replace table t (a vector(1)); |
Query OK, 0 rows affected (0.090 sec) |
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MariaDB [test]> show create table t\G |
*************************** 1. row ***************************
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Table: t |
Create Table: CREATE TABLE `t` ( |
`a` vector(1) DEFAULT NULL |
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci |
1 row in set (0.001 sec) |
Further, the default NULL value can be insert either by omitting any value, or by using DEFAULT();
MariaDB [test]> insert into t values (); |
Query OK, 1 row affected (0.014 sec)
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MariaDB [test]> insert into t values (default(a)); |
Query OK, 1 row affected (0.013 sec)
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MariaDB [test]> select * from t; |
+------+ |
| a |
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+------+ |
| NULL | |
| NULL | |
+------+ |
2 rows in set (0.001 sec) |
However, it cannot be inserted explicitly:
MariaDB [test]> insert into t values (null); |
ERROR 4078 (HY000): Cannot cast 'null' as 'vector' in assignment of `test`.`t`.`a` |
Using non-strict mode or IGNORE allows to do it though:
MariaDB [test]> delete from t; |
Query OK, 3 rows affected (0.014 sec) |
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MariaDB [test]> insert ignore into t values (null); |
Query OK, 1 row affected, 1 warning (0.012 sec)
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MariaDB [test]> show warnings;
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+---------+------+----------------------------------------------------------------+ |
| Level | Code | Message | |
+---------+------+----------------------------------------------------------------+ |
| Warning | 4078 | Cannot cast 'null' as 'vector' in assignment of `test`.`t`.`a` | |
+---------+------+----------------------------------------------------------------+ |
1 row in set (0.000 sec) |
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MariaDB [test]> select * from t; |
+------+ |
| a |
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+------+ |
| NULL | |
+------+ |
1 row in set (0.001 sec) |
It is all currently in vain though, because the vector index does not allow NULL-able columns (if I understand correctly, the idea is to allow and ignore NULLs in the index, so I'm adding it here in case it is going to happen):
MariaDB [test]> truncate table t; |
Query OK, 0 rows affected (0.028 sec) |
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MariaDB [test]> alter table t add vector(a); |
ERROR 1252 (42000): All parts of a VECTOR index must be NOT NULL |
Attachments
Issue Links
- is caused by
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MDEV-34939 vector search in 11.7
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- Closed
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