ALTER_TEXT_SEARCH_DICTIONARY (7)
Leading comments
Title: ALTER TEXT SEARCH DICTIONARY
Author: The PostgreSQL Global Development Group
Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
Date: 2017
Manual: PostgreSQL 9.6.5 Documentation
Source: PostgreSQL 9.6.5
Language: English
NAME
ALTER_TEXT_SEARCH_DICTIONARY - change the definition of a text search dictionarySYNOPSIS
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 lqupdatesrq 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.
COMPATIBILITY
There is no ALTER TEXT SEARCH DICTIONARY statement in the SQL standard.