PostgreSQL
ALTER TEXT SEARCH DICTIONARY
ALTER TEXT SEARCH DICTIONARY — change the definition of a text search dictionary
Synopsis
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 | CURRENT_USER | SESSION_USER }
ALTER TEXT SEARCH DICTIONARY name SET SCHEMA new_schema
Description
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
.
Parameters
- `name`
-
The name (optionally schema-qualified) of an existing text search dictionary.
- `option`
-
The name of a template-specific option to be set for this dictionary.
- `value`
-
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.
- `new_name`
-
The new name of the text search dictionary.
- `new_owner`
-
The new owner of the text search dictionary.
- `new_schema`
-
The new schema for the text search dictionary.
Template-specific options can appear in any order.
Examples
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 “[.quote]#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.
See Also
[.refentrytitle#CREATE TEXT SEARCH DICTIONARY], DROP TEXT SEARCH DICTIONARY#
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