Postgresql 中文操作指南
ALTER TEXT SEARCH CONFIGURATION
ALTER TEXT SEARCH CONFIGURATION — 更改对文本搜索配置的定义
ALTER TEXT SEARCH CONFIGURATION — change the definition of a text search configuration
Synopsis
ALTER TEXT SEARCH CONFIGURATION name
ADD MAPPING FOR token_type [, ... ] WITH dictionary_name [, ... ]
ALTER TEXT SEARCH CONFIGURATION name
ALTER MAPPING FOR token_type [, ... ] WITH dictionary_name [, ... ]
ALTER TEXT SEARCH CONFIGURATION name
ALTER MAPPING REPLACE old_dictionary WITH new_dictionary
ALTER TEXT SEARCH CONFIGURATION name
ALTER MAPPING FOR token_type [, ... ] REPLACE old_dictionary WITH new_dictionary
ALTER TEXT SEARCH CONFIGURATION name
DROP MAPPING [ IF EXISTS ] FOR token_type [, ... ]
ALTER TEXT SEARCH CONFIGURATION name RENAME TO new_name
ALTER TEXT SEARCH CONFIGURATION name OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER TEXT SEARCH CONFIGURATION name SET SCHEMA new_schemaDescription
ALTER TEXT SEARCH CONFIGURATION 更改对文本搜索配置的定义。你可以修改从标记类型到词典的映射，或更改配置名称或所有者。
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.
你必须是该配置的所有者才能使用 ALTER TEXT SEARCH CONFIGURATION 。
You must be the owner of the configuration to use ALTER TEXT SEARCH CONFIGURATION.
Parameters
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name
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The name (optionally schema-qualified) of an existing text search configuration.
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token_type
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The name of a token type that is emitted by the configuration’s parser.
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dictionary_name
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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.
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old_dictionary
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The name of a text search dictionary to be replaced in the mapping.
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new_dictionary
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The name of a text search dictionary to be substituted for old_dictionary.
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new_name
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The new name of the text search configuration.
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new_owner
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The new owner of the text search configuration.
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new_schema
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The new schema for the text search configuration.
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ADD MAPPING FOR 形式安装一个要针对指定标记类型(们)进行协商的词典列表；如果任何标记类型已存在映射，则会出现错误。 ALTER MAPPING FOR 形式也会执行相同的操作，但首先删除那些标记类型的任何现有映射。 ALTER MAPPING REPLACE 形式用 new_dictionary 替换 old_dictionary 在任何后者出现的地方。仅在出现 FOR 时对指定标记类型执行此操作，或者当它不存在时针对配置的所有映射执行此操作。 DROP MAPPING 形式删除针对指定标记类型(们)的所有词典，导致文本搜索配置忽略那些类型的标记。如果不存在标记类型映射，则会出现错误，除非出现 IF EXISTS 。
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
以下示例在 my_config 中任何使用 english 的地方用 swedish 词典替换 english 词典。
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;