Important

New database features are no longer connected to engine versions; features are now enabled independently during scheduled update windows, and “major” and “minor” releases no longer exist in Helios. Please visit the release notes to view the latest features available in your database clusters.

DROP FUNCTION

Syntax

SQL

DROP FUNCTION [IF EXISTS] {function_name | database_name.function_name} [FORCE]

Remarks

Only one function can be removed using the DROP FUNCTION command.
If DROP FUNCTION is executed for a function that does not exist, the following error occurs:
SQL
```
DROP FUNCTION myfunction;
ERROR 1998 (HY000): Function 'db1.myfunction' doesn't exist
```
However, if the IF EXISTS condition is used and the function does not exist, no error occurs:
SQL
```
DROP FUNCTION IF EXISTS myfunction;
Query OK, 0 rows affected (0.00 sec)
```
Specify the FORCE option to remove a function (UDF) created by an Extension. You must have the DROP EXTENSION permission to use this option.
This command causes implicit commits. Refer to COMMIT for more information.
Refer to the Permissions Matrix for the required permissions.

Examples

Drop a Function in the Current Database

The following example removes an existing function from the current database.

SQL

SHOW FUNCTIONS;

+------------------+-----------------------+
| Functions_in_db1 | Function Type         |
+------------------+-----------------------+
| myfunction       | User Defined Function |
+------------------+-----------------------+
1 row in set (0.00 sec)

SQL

DROP FUNCTION myfunction;

SHOW FUNCTIONS;

Query OK, 0 rows affected (0.07 sec)

Dropping a Function in Another Database

The following example removes an existing function while connected to another database in your SingleStore Helios cluster.

SQL

USE db1;

SHOW FUNCTIONS;

+------------------+-----------------------+
| Functions_in_db1 | Function Type         |
+------------------+-----------------------+
| myfunction       | User Defined Function |
+------------------+-----------------------+
1 row in set (0.00 sec)

SQL

USE db2;

DROP FUNCTION db1.myfunction;

Query OK, 0 rows affected (0.05 sec)

SQL

USE db1;

SHOW FUNCTIONS;

Query OK, 0 rows affected (0.07 sec)

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