Removes the specified data metric function (DMF) from the current or specified schema.
Syntax¶DROP FUNCTION [ IF EXISTS ] <name>( TABLE( <arg_data_type> [ , ... ] ) [ , TABLE( <arg_data_type> [ , ... ] ) ] )
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Parameters¶name
Identifier for the DMF to drop.
If the identifier contains spaces or special characters, the entire string must be enclosed in double quotes. Identifiers enclosed in double quotes are also case-sensitive.
For more information, see Identifier requirements.
TABLE( arg_data_type [ , ... ] ) [ , TABLE( arg_data_type [ , ... ] ) ]
Specifies the data type of the column arguments for the DMF. The data types are necessary because DMFs support name overloading (that is, two DMFs in the same schema can have the same name), and the data types of the arguments are used to identify the DMF you want to drop.
A role used to execute this operation must have the following privileges at a minimum:
Privilege
Object
Notes
OWNERSHIP
Data metric function
The USAGE privilege on the parent database and schema are required to perform operations on any object in a schema.
For instructions on creating a custom role with a specified set of privileges, see Creating custom roles.
For general information about roles and privilege grants for performing SQL actions on securable objects, see Overview of Access Control.
Usage notes¶When the IF EXISTS clause is specified and the target object doesn’t exist, the command completes successfully without returning an error.
Drop a custom DMF from the system:
DROP FUNCTION governance.dmfs.count_positive_numbers(
TABLE(
NUMBER, NUMBER, NUMBER
)
);
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