ALTER_INDEX man page on Oracle

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ALTER INDEX(7)		PostgreSQL 9.2.7 Documentation		ALTER INDEX(7)

       ALTER_INDEX - change the definition of an index

       ALTER INDEX [ IF EXISTS ] name RENAME TO new_name
       ALTER INDEX [ IF EXISTS ] name SET TABLESPACE tablespace_name
       ALTER INDEX [ IF EXISTS ] name SET ( storage_parameter = value [, ... ] )
       ALTER INDEX [ IF EXISTS ] name RESET ( storage_parameter [, ... ] )

       ALTER INDEX changes the definition of an existing index. There are
       several subforms:

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

	   The RENAME form changes the name of the index. There is no effect
	   on the stored data.

	   This form changes the index's tablespace to the specified
	   tablespace and moves the data file(s) associated with the index to
	   the new tablespace. See also CREATE TABLESPACE

       SET ( storage_parameter = value [, ... ] )
	   This form changes one or more index-method-specific storage
	   parameters for the index. See CREATE INDEX (CREATE_INDEX(7)) for
	   details on the available parameters. Note that the index contents
	   will not be modified immediately by this command; depending on the
	   parameter you might need to rebuild the index with REINDEX(7) to
	   get the desired effects.

       RESET ( storage_parameter [, ... ] )
	   This form resets one or more index-method-specific storage
	   parameters to their defaults. As with SET, a REINDEX might be
	   needed to update the index entirely.

	   The name (possibly schema-qualified) of an existing index to alter.

	   The new name for the index.

	   The tablespace to which the index will be moved.

	   The name of an index-method-specific storage parameter.

	   The new value for an index-method-specific storage parameter. This
	   might be a number or a word depending on the parameter.

       These operations are also possible using ALTER TABLE (ALTER_TABLE(7)).
       ALTER INDEX is in fact just an alias for the forms of ALTER TABLE that
       apply to indexes.

       There was formerly an ALTER INDEX OWNER variant, but this is now
       ignored (with a warning). An index cannot have an owner different from
       its table's owner. Changing the table's owner automatically changes the
       index as well.

       Changing any part of a system catalog index is not permitted.

       To rename an existing index:

	   ALTER INDEX distributors RENAME TO suppliers;

       To move an index to a different tablespace:

	   ALTER INDEX distributors SET TABLESPACE fasttablespace;

       To change an index's fill factor (assuming that the index method
       supports it):

	   ALTER INDEX distributors SET (fillfactor = 75);
	   REINDEX INDEX distributors;

       ALTER INDEX is a PostgreSQL extension.


PostgreSQL 9.2.7		  2014-02-17			ALTER INDEX(7)

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