DROP TABLE

Removes a table.

Synopsis

  1. DROP TABLE [IF EXISTS] <name> [, ...] [CASCADE | RESTRICT]

Description

DROP TABLE removes tables from the database. Only its owner may drop a table. To empty a table of rows without removing the table definition, use TRUNCATE.

DROP TABLE always removes any indexes, rules, and constraints that exist for the target table. However, to drop a table that is referenced by a view, CASCADE must be specified. CASCADE will remove a dependent view entirely.

Parameters

IF EXISTS

Do not throw an error if the table does not exist. A notice is issued in this case.

The name (optionally schema-qualified) of the table to remove.

CASCADE

Automatically drop objects that depend on the table (such as views).

RESTRICT

Refuse to drop the table if any objects depend on it. This is the default.

Examples

Remove the table mytable:

  1. DROP TABLE mytable;

Compatibility

DROP TABLE is fully conforming with the SQL standard, except that the standard only allows one table to be dropped per command. Also, the IF EXISTS option is a HAWQ extension.

See Also

CREATE TABLE, ALTER TABLE, TRUNCATE