ALTER INDEX — change the definition of an index
ALTER INDEXname
RENAME TOnew_name
ALTER INDEXname
SET TABLESPACEtablespace_name
ALTER INDEX
changes the definition of an existing index.
There are several subforms:
RENAME
The RENAME
form changes the name of the index.
There is no effect on the stored data.
SET TABLESPACE
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.
name
The name (possibly schema-qualified) of an existing index to alter.
new_name
New name for the index.
tablespace_name
The tablespace to which the index will be moved.
These operations are also possible using
ALTER TABLE.
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.