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_dictionary
ALTER TEXT SEARCH CONFIGURATIONname
ALTER MAPPING FORtoken_type
[, ... ] REPLACEold_dictionary
WITHnew_dictionary
ALTER TEXT SEARCH CONFIGURATIONname
DROP MAPPING [ IF EXISTS ] FORtoken_type
[, ... ] ALTER TEXT SEARCH CONFIGURATIONname
RENAME TOnew_name
ALTER TEXT SEARCH CONFIGURATIONname
OWNER TO {new_owner
| 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 use ALTER TEXT SEARCH CONFIGURATION
.
Parameters
name
The name (optionally schema-qualified) of an existing text search configuration.
token_type
The name of a token type that is emitted by the configuration's parser.
dictionary_name
The name of a text search dictionary to be consulted for the specified token type(s). If multiple dictionaries are listed, they are consulted in the specified order.
old_dictionary
The name of a text search dictionary to be replaced in the mapping.
new_dictionary
The name of a text search dictionary to be substituted for
old_dictionary
.new_name
The new name of the text search configuration.
new_owner
The new owner of the text search configuration.
new_schema
The new schema for the text search configuration.
The ADD 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. The ALTER MAPPING FOR
form does the same, but first removing any existing mapping for those token types. The ALTER MAPPING REPLACE
forms substitute new_dictionary
for old_dictionary
anywhere the latter appears. This is done for only the specified token types when FOR
appears, or for all mappings of the configuration when it doesn't. The DROP 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, unless IF EXISTS
appears.
Examples
The following example replaces the english
dictionary with the swedish
dictionary anywhere that english
is used within my_config
.
ALTER TEXT SEARCH CONFIGURATION my_config ALTER MAPPING REPLACE english WITH swedish;
Compatibility
There is no ALTER TEXT SEARCH CONFIGURATION
statement in the SQL standard.