davidkvc / searchawesome

using postgres for full text search on users

SearchAwesome

This is an exploration of how could we use Postgres' full text search capabilities to search user accounts

Setup

create extension unaccent;
create extension fuzzystrmatch;

create table users (
	id int generated always as identity primary key,
	ma_id text,
	da_id text,
	name text,
	display_name text,
	email text,
	ts tsvector
);

CREATE or replace FUNCTION users_trigger() RETURNS trigger AS $$
declare
	email_domain text;
begin
	email_domain := SUBSTRING(new.email, position('@' in new.email));
 	new.ts :=
  		setweight(to_tsvector('simple', coalesce(new.name, '')), 'A') ||
		setweight(to_tsvector('simple', unaccent(coalesce(new.name, ''))), 'B') ||
  		setweight(to_tsvector('simple', unaccent(coalesce(new.display_name, ''))), 'B') ||
	  	setweight(to_tsvector('simple', coalesce(email_domain, '')), 'B') ||
		setweight(to_tsvector('simple', coalesce(new.email, '')), 'C');
	return new;
end
$$ LANGUAGE plpgsql;

CREATE TRIGGER users_tsvectorupdate BEFORE INSERT OR UPDATE
    ON users FOR EACH ROW EXECUTE FUNCTION users_trigger();
   
CREATE INDEX users_ts_idx ON users USING gin(ts);