# phpman > man > DROP_INDEX(7)

DROP [INDEX(7)](https://www.chedong.com/phpMan.php/man/INDEX/7/markdown)                      PostgreSQL 14.23 Documentation                      DROP [INDEX(7)](https://www.chedong.com/phpMan.php/man/INDEX/7/markdown)



## NAME
       DROP_INDEX - remove an index

## SYNOPSIS
       DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] _name_ [, ...] [ CASCADE | RESTRICT ]

## DESCRIPTION
       **DROP** **INDEX** drops an existing index from the database system. To execute this command you must
       be the owner of the index.

## PARAMETERS
       CONCURRENTLY
           Drop the index without locking out concurrent selects, inserts, updates, and deletes on
           the index's table. A normal **DROP** **INDEX** acquires an ACCESS 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.
           Lastly, indexes on partitioned tables cannot be dropped using this option.

           For temporary tables, **DROP** **INDEX** is always non-concurrent, as no other session can access
           them, and non-concurrent index drop is cheaper.

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

       _name_
           The name (optionally schema-qualified) of an index to remove.

       CASCADE
           Automatically drop objects that depend on the index, and in turn all objects that depend
           on those objects (see Section 5.14).

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

## EXAMPLES
       This command will remove the index title_idx:

           DROP INDEX title_idx;

## COMPATIBILITY
       **DROP** **INDEX** is a PostgreSQL language extension. There are no provisions for indexes in the SQL
       standard.

## SEE ALSO
       CREATE INDEX (**CREATE**___**[INDEX**(7)](https://www.chedong.com/phpMan.php/man/INDEX/7/markdown))



PostgreSQL 14.23                                2026                                   DROP [INDEX(7)](https://www.chedong.com/phpMan.php/man/INDEX/7/markdown)