Manual Reference Pages - DROP_INDEX (7)
DROP_INDEX - remove an index
DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
drops an existing index from the database system. To execute this command you must be the owner of the index.
Drop the index without locking out concurrent selects, inserts, updates, and deletes on the indexs table. A normal
acquires 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
option is not supported. (Thus, an index that supports a
constraint cannot be dropped this way.) Also, regular
commands can be performed within a transaction block, but
DROP INDEX CONCURRENTLY
Do not throw an error if the index does not exist. A notice is issued in this case.
The name (optionally schema-qualified) of an index to remove.
Automatically drop objects that depend on the index.
Refuse to drop the index if any objects depend on it. This is the default.
This command will remove the index
DROP INDEX title_idx;
language extension. There are no provisions for indexes in the SQL standard.
CREATE INDEX (CREATE_INDEX(7))
|PostgreSQL 9.5.2 ||DROP INDEX (7) ||2016 |
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