Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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10.4.0, 10.4(EOL), 10.5
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None
Description
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10.5 f544a712c8 |
MariaDB [test]> create or replace table t1 (a int); |
Query OK, 0 rows affected (0.188 sec) |
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MariaDB [test]> insert into t1 values (1),(2),(3) order by 1 desc limit 1; |
Query OK, 3 rows affected (0.021 sec) |
Records: 3 Duplicates: 0 Warnings: 0
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MariaDB [test]> select * from t1; |
+------+ |
| a |
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+------+ |
| 1 |
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| 2 |
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| 3 |
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+------+ |
3 rows in set (0.001 sec) |
I would expect it either to return an error if syntax is not supported; or return a warning if the clauses are intentionally accepted but ignored; or apply them in a meaningful way and be documented.
MariaDB versions before 10.4, as well as all MySQL versions, throw a syntax error upon it.
PostgreSQL (9.6) accepts it and produces a more reasonable result:
postgres=# create table t1 (a int); |
CREATE TABLE |
postgres=# insert into t1 values (1),(2),(3) order by 1 desc limit 1; |
INSERT 0 1 |
postgres=# select * from t1; |
a
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---
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3
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(1 row)
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The change came to 10.4 with this commit:
commit de745ecf29721795710910a19bd0ea3389da804c
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Author: Oleksandr Byelkin
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Date: Tue May 22 19:08:39 2018 +0200
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MDEV-11953: support of brackets in UNION/EXCEPT/INTERSECT operations
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I don't know if it was intentional or not.
I couldn't find the syntax in the standard 2011 draft, but maybe I didn't search well enough. I don't have access to newer versions.
Attachments
Issue Links
- is caused by
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MDEV-11953 support of brackets (parentheses) in UNION/EXCEPT/INTERSECT operations
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- Closed
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