Removes an index.
DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] <name> [, ...] [ CASCADE | RESTRICT ]
DROP INDEX
drops an existing index from the database system. To run this command you must be the owner of the index.
DROP INDEX
acquires an exclusive lock on the table, blocking other accesses until the index drop can be completed. With this option, the command instead waits until conflicting transactions have completed.
There are several caveats to be aware of when using this option. Only one index name can be specified, and the CASCADE
option is not supported. (Thus, an index that supports a UNIQUE
or PRIMARY KEY
constraint cannot be dropped this way.) Also, regular DROP INDEX
commands can be performed within a transaction block, but DROP INDEX CONCURRENTLY
cannot.
Remove the index title_idx
:
DROP INDEX title_idx;
DROP INDEX
is a Greenplum Database language extension. There are no provisions for indexes in the SQL standard.
ALTER INDEX, CREATE INDEX, REINDEX
Parent topic: SQL Commands