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 If the  pg_trgm  extension is not present in your PostgreSQL setup, here's how you can enable it. Log in to your PostgreSQL database:                                                              psql - U postgres                                              Enable the pg_trgm extension by running the following command: CREATE EXTENSION IF NOT EXISTS pg_trgm;                                                                Verify that the extension is enabled: SELECT * FROM pg_extension WHERE extname = 'pg_trgm' ;