简体中文

DROP OPERATOR

Removes an operator.

Synopsis

DROP OPERATOR [IF EXISTS] <name> ( {<left_type> | NONE} , 
    {<right_type> | NONE} ) [, ...] [CASCADE | RESTRICT]

DROP OPERATOR drops an existing operator from the database system. To run this command you must be the owner of the operator.

IF EXISTS
- Do not throw an error if the operator does not exist. A notice is issued in this case.
name
- The name (optionally schema-qualified) of an existing operator.
left_type
- The data type of the operator's left operand; write NONE if the operator has no left operand.
right_type
- The data type of the operator's right operand; write NONE if the operator has no right operand.
CASCADE
- Automatically drop objects that depend on the operator (such as views using it), and in turn all objects that depend on those objects.
RESTRICT
- Refuse to drop the operator if any objects depend on it. This is the default.

Remove the power operator a^b for type integer:

DROP OPERATOR ^ (integer, integer);

Remove the left unary bitwise complement operator ~b for type bit:

DROP OPERATOR ~ (none, bit);

Remove the right unary factorial operator x! for type bigint:

DROP OPERATOR ! (bigint, none);

Remove multiple operators in one command:

DROP OPERATOR ~ (none, bit), ! (bigint, none);

There is no DROP OPERATOR statement in the SQL standard.