pg_search

pig repo add pgsql -u   # add PGDG + Pigsty repo and update cache (leave existing repos)

pig ext install pg_search; # install by extension name, for the current active PG version
pig ext install pg_search; # install via package alias, for the active PG version
pig ext install pg_search -v 17;   # install for PG 17
pig ext install pg_search -v 16;   # install for PG 16
pig ext install pg_search -v 15;   # install for PG 15
pig ext install pg_search -v 14;   # install for PG 14

CREATE EXTENSION pg_search CASCADE SCHEMA paradedb;

CREATE EXTENSION pg_search;

ALTER SYSTEM SET paradedb.pg_search_telemetry TO 'off';

CALL paradedb.create_bm25_test_table(
  schema_name => 'public',
  table_name => 'mock_items'
);
    
SELECT description, rating, category FROM mock_items LIMIT 3;

CALL paradedb.create_bm25(
        index_name => 'search_idx',
        schema_name => 'public',
        table_name => 'mock_items',
        key_field => 'id',
        text_fields => paradedb.field('description', tokenizer => paradedb.tokenizer('en_stem')) ||
                       paradedb.field('category'),
        numeric_fields => paradedb.field('rating')
     );

SELECT description, rating, category
FROM search_idx.search('(description:keyboard OR category:electronics) AND rating:>2',limit_rows => 5);

CALL paradedb.create_bm25(
        index_name => 'ngrams_idx',
        schema_name => 'public',
        table_name => 'mock_items',
        key_field => 'id',
        text_fields => paradedb.field('description', tokenizer => paradedb.tokenizer('ngram', min_gram => 4, max_gram => 4, prefix_only => false)) ||
                       paradedb.field('category')
     );

SELECT description, rating, category
FROM ngrams_idx.search('description:blue');