DROP CONVERSION
Name
DROP CONVERSION -- remove a conversion
Synopsis
DROP CONVERSION [ IF EXISTS ] name [ CASCADE | RESTRICT ]
描述
DROP CONVERSION removes a previously defined conversion.
To be able to drop a conversion, you must own the conversion.
参数
- IF EXISTS
Do not throw an error if the conversion does not exist.
A notice is issued in this case.
- name
The name of the conversion. The conversion name can be
schema-qualified.
- CASCADE
RESTRICT These key words do not have any effect, since there are no
dependencies on conversions.
例子
To drop the conversion named myname:
DROP CONVERSION myname;
兼容性
There is no DROP CONVERSION statement in the SQL
standard, but a DROP TRANSLATION statement that
goes along with the CREATE TRANSLATION statement
that is similar to the CREATE CONVERSION
statement in PostgreSQL.