Manual Reference Pages - 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 ALL IN TABLESPACE name [ OWNED BY role_name [, ... ] ]
SET TABLESPACE new_tablespace [ NOWAIT ]
changes the definition of an existing index. There are several subforms:
Do not throw an error if the index does not exist. A notice is issued in this case.
form changes the name of the index. There is no effect on the stored data.
This form changes the indexs tablespace to the specified tablespace and moves the data file(s) associated with the index to the new tablespace. To change the tablespace of an index, you must own the index and have
privilege on the new tablespace. All indexes in the current database in a tablespace can be moved by using the
ALL IN TABLESPACE
form, which will lock all indexes to be moved and then move each one. This form also supports
OWNED BY, which will only move indexes owned by the roles specified. If the
option is specified then the command will fail if it is unable to acquire all of the locks required immediately. Note that system catalogs will not be moved by this command, use
invocations instead if desired. See also
CREATE TABLESPACE (CREATE_TABLESPACE(7)).
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
to get the desired effects.
RESET ( storage_parameter [, ... ] )
This form resets one or more index-method-specific storage parameters to their defaults. As with
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)).
is in fact just an alias for the forms of
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 tables owner. Changing the tables 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 indexs fill factor (assuming that the index method supports it):
ALTER INDEX distributors SET (fillfactor = 75);
REINDEX INDEX distributors;
CREATE INDEX (CREATE_INDEX(7)), REINDEX(7)
|PostgreSQL 9.5.2 ||ALTER INDEX (7) ||2016 |
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