ALTER TEXT SEARCH DICTIONARY name (
option [ = value ] [, ... ]
ALTER TEXT SEARCH DICTIONARY name RENAME TO new_name
ALTER TEXT SEARCH DICTIONARY name OWNER TO new_owner
ALTER TEXT SEARCH DICTIONARY name SET SCHEMA new_schema
The following description applies both to Postgres-XC and PostgreSQL if not described explicitly.
ALTER TEXT SEARCH DICTIONARY changes the definition of a text search dictionary. You can change the dictionary's template-specific options, or change the dictionary's name or owner.
You must be the owner of the dictionary to use ALTER TEXT SEARCH DICTIONARY.
- The name (optionally schema-qualified) of an existing text search dictionary.
- The name of a template-specific option to be set for this dictionary.
- The new value to use for a template-specific option. If the equal sign and value are omitted, then any previous setting for the option is removed from the dictionary, allowing the default to be used.
- The new name of the text search dictionary.
- The new owner of the text search dictionary.
- The new schema for the text search dictionary.
Template-specific options can appear in any order.
The following example command changes the stopword list for a Snowball-based dictionary. Other parameters remain unchanged.
ALTER TEXT SEARCH DICTIONARY my_dict ( StopWords = newrussian );
The following example command changes the language option to dutch, and removes the stopword option entirely.
ALTER TEXT SEARCH DICTIONARY my_dict ( language = dutch, StopWords );
The following example command "updates" the dictionary's definition without actually changing anything.
ALTER TEXT SEARCH DICTIONARY my_dict ( dummy );
(The reason this works is that the option removal code doesn't complain if there is no such option.) This trick is useful when changing configuration files for the dictionary: the ALTER will force existing database sessions to re-read the configuration files, which otherwise they would never do if they had read them earlier.
There is no ALTER TEXT SEARCH DICTIONARY statement in the SQL standard.