PostgreSQL version:

default_text_search_config

Selects the text search configuration that is used by those variants of the text search functions that do not have an explicit argument specifying the configuration. See textsearch for further information. The built-in default is pg_catalog.simple, but initdb will initialize the configuration file with a setting that corresponds to the chosen lc_ctype locale, if a configuration matching that locale can be identified.

Recommendations

Set to the most common language used by the users, so that they don't have to pass the language parameter when calling TSearch functions.

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