Movatterモバイル変換

ALTER TEXT SEARCH CONFIGURATION

ALTER TEXT SEARCH CONFIGURATION — change the definition of a text search configuration

Synopsis

ALTER TEXT SEARCH CONFIGURATIONname    ADD MAPPING FORtoken_type [, ... ] WITHdictionary_name [, ... ]ALTER TEXT SEARCH CONFIGURATIONname    ALTER MAPPING FORtoken_type [, ... ] WITHdictionary_name [, ... ]ALTER TEXT SEARCH CONFIGURATIONname    ALTER MAPPING REPLACEold_dictionary WITHnew_dictionaryALTER TEXT SEARCH CONFIGURATIONname    ALTER MAPPING FORtoken_type [, ... ] REPLACEold_dictionary WITHnew_dictionaryALTER TEXT SEARCH CONFIGURATIONname    DROP MAPPING [ IF EXISTS ] FORtoken_type [, ... ]ALTER TEXT SEARCH CONFIGURATIONname RENAME TOnew_nameALTER TEXT SEARCH CONFIGURATIONname OWNER TO {new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }ALTER TEXT SEARCH CONFIGURATIONname SET SCHEMAnew_schema

Description

ALTER TEXT SEARCH CONFIGURATION changes the definition of a text search configuration. You can modify its mappings from token types to dictionaries, or change the configuration's name or owner.

You must be the owner of the configuration to useALTER TEXT SEARCH CONFIGURATION.

Parameters

TheADD MAPPING FOR form installs a list of dictionaries to be consulted for the specified token type(s); it is an error if there is already a mapping for any of the token types. TheALTER MAPPING FOR form does the same, but first removing any existing mapping for those token types. TheALTER MAPPING REPLACE forms substitutenew_dictionary forold_dictionary anywhere the latter appears. This is done for only the specified token types whenFOR appears, or for all mappings of the configuration when it doesn't. TheDROP MAPPING form removes all dictionaries for the specified token type(s), causing tokens of those types to be ignored by the text search configuration. It is an error if there is no mapping for the token types, unlessIF EXISTS appears.

Examples

The following example replaces theenglish dictionary with theswedish dictionary anywhere thatenglish is used withinmy_config.

ALTER TEXT SEARCH CONFIGURATION my_config  ALTER MAPPING REPLACE english WITH swedish;

Compatibility

There is noALTER TEXT SEARCH CONFIGURATION statement in the SQL standard.

See Also