text: CREATE TABLE memos (
    id integer,
    user_name text,
    contents text[]
  );
  
  CREATE USER alice NOLOGIN;
  GRANT ALL ON TABLE memos TO alice;
  
  INSERT INTO memos VALUES
    (1,
     'nonexistent',
     ARRAY['PostgreSQL is an OSS RDBMS',
           'PostgreSQL has partial full-text search support']);
  INSERT INTO memos VALUES
    (2,
     'alice',
      ARRAY['Groonga is an OSS full-text search engine',
            'Groonga has full full-text search support']);
  INSERT INTO memos VALUES
    (3,
     'alice',
     ARRAY['PGroonga is an OSS PostgreSQL extension',
           'PGroonga adds full full-text search support based on Groonga to PostgreSQL']);
  
  ALTER TABLE memos ENABLE ROW LEVEL SECURITY;
  CREATE POLICY memos_myself ON memos USING (user_name = current_user);
  
  SET enable_seqscan = on;
  SET enable_indexscan = off;
  SET enable_bitmapscan = off;
  
  SET SESSION AUTHORIZATION alice;
  \pset format unaligned
  EXPLAIN (COSTS OFF)
  SELECT id, contents
    FROM memos
   WHERE contents &@~| Array['rdbms', 'groonga engine']
  \g |sed -r -e "s/\(CURRENT_USER\)::text/CURRENT_USER/g"
  \pset format aligned
  
  SELECT id, contents
    FROM memos
   WHERE contents &@~| Array['rdbms', 'groonga engine'];
  RESET SESSION AUTHORIZATION;
  
  DROP TABLE memos;
  
  DROP USER alice;
  