redhat man page for drop_index

DROP 
INDEX(7)							   SQL Commands 						     DROP INDEX(7)

NAME
       DROP INDEX - remove an index

SYNOPSIS
       DROP INDEX index_name [, ...] [ CASCADE | RESTRICT ]

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

       CASCADE
	      Automatically drop objects that depend on the index.

       RESTRICT
	      Refuse to drop the index if there are any dependent objects.  This is the default.

   OUTPUTS
       DROP INDEX
	      The message returned if the command completes successfully.

       ERROR: index "index_name" does not exist
	      This message occurs if index_name is not an index in the database.

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

   NOTES
       DROP INDEX is a PostgreSQL language extension.

       Refer to CREATE INDEX [create_index(7)] for information on how to create indexes.

USAGE
       This command will remove the title_idx index:

	   DROP INDEX title_idx;

COMPATIBILITY
   SQL92
       SQL92  defines  commands by which to access a generic relational database.  Indexes are an implementation-dependent feature and hence there
       are no index-specific commands or definitions in the SQL92 language.

SQL - Language Statements					    2002-11-22							     DROP INDEX(7)