Details
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Bug
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Status: Closed (View Workflow)
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Blocker
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Resolution: Fixed
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10.6, 10.7, 10.8, 10.9, 10.10, 10.11, 11.0, 11.1, 11.2
Description
This script:
CREATE OR REPLACE FUNCTION empty(a VARCHAR(128)) RETURNS int RETURN LENGTH(a)=0; |
SELECT empty('1'); |
used to work without any unexpected side effects prior to 10.6:
MariaDB [test]> CREATE OR REPLACE FUNCTION empty(a VARCHAR(128)) RETURNS int RETURN LENGTH(a)=0; |
Query OK, 0 rows affected (0.007 sec) |
 |
MariaDB [test]> SELECT empty('1'); |
+------------+ |
| empty('1') | |
+------------+ |
| 0 |
|
+------------+ |
1 row in set (0.002 sec) |
Starting from 10.6, behavior changed:
The CREATE statement now raises a warnings:
CREATE OR REPLACE FUNCTION empty(a VARCHAR(128)) RETURNS int RETURN LENGTH(a)=0; |
SHOW WARNINGS;
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+-------+------+--------------------------------------------------------------+
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| Level | Code | Message |
|
+-------+------+--------------------------------------------------------------+
|
| Note | 1585 | This function 'empty' has the same name as a native function |
|
+-------+------+--------------------------------------------------------------+
|
The warning is not correct. 'empty' is not a native function! It's only a new 10.6 non-reserved keyword. There should not be any warnings.
The SELECT statement now raises a syntax error:
SELECT empty('1'); |
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '('1')' at line 1
|
This is wrong. No errors expected.
These behavior changes raise problems on upgrade.
The problem was caused by MDEV-17399.
Other keywords added in MDEV-17399 should also be checked for the same problem:
+%token <kwd> EMPTY_SYM /* SQL-2016-R */ |
+%token <rwd> JSON_TABLE_SYM
|
+%token <kwd> NESTED_SYM /* SQL-2003-N */ |
+%token <kwd> ORDINALITY_SYM /* SQL-2003-N */ |
+%token <kwd> PATH_SYM /* SQL-2003-N */ |
Attachments
Issue Links
- is caused by
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MDEV-17399 Add support for JSON_TABLE
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- Closed
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