DROP INDEX — remove an index
DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ]
name[, ...] [ CASCADE | RESTRICT ]
DROP INDEX 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 index's table. A
DROP INDEX 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
There are several caveats to be aware of when using
this option. Only one index name can be specified, and
CASCADE option is not
supported. (Thus, an index that supports a
KEY constraint cannot be dropped this way.) Also,
DROP INDEX 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, and in turn all objects that depend on those objects (see Section 5.13).
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;
DROP INDEX is a PostgreSQL language extension. There are
no provisions for indexes in the SQL standard.