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 the index without locking out concurrent selects, inserts, updates, and deletes on the index's table. A normal
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.
CASCADEoption is not supported. (Thus, an index that supports a
PRIMARY KEYconstraint cannot be dropped this way.) Also, regular
DROP INDEXcommands can be performed within a transaction block, but
DROP INDEX CONCURRENTLYcannot.
Remove the index
DROP INDEX title_idx;
DROP INDEX is a Greenplum Database language extension. There are no provisions for indexes in the SQL standard.
Parent topic: SQL Commands