rails--rails/activerecord/test/schema/postgresql_specific_schema.rb

ActiveRecord::Schema.define do

  %w(postgresql_times postgresql_oids defaults postgresql_timestamp_with_zones
      postgresql_partitioned_table postgresql_partitioned_table_parent).each do |table_name|
    drop_table table_name, if_exists: true
  end

  execute 'DROP SEQUENCE IF EXISTS companies_nonstd_seq CASCADE'
  execute 'CREATE SEQUENCE companies_nonstd_seq START 101 OWNED BY companies.id'
  execute "ALTER TABLE companies ALTER COLUMN id SET DEFAULT nextval('companies_nonstd_seq')"
  execute 'DROP SEQUENCE IF EXISTS companies_id_seq'

  execute 'DROP FUNCTION IF EXISTS partitioned_insert_trigger()'

  %w(accounts_id_seq developers_id_seq projects_id_seq topics_id_seq customers_id_seq orders_id_seq).each do |seq_name|
    execute "SELECT setval('#{seq_name}', 100)"
  end

  execute <<_SQL
    CREATE TABLE defaults (
    id serial primary key,
    modified_date date default CURRENT_DATE,
    modified_date_function date default now(),
    fixed_date date default '2004-01-01',
    modified_time timestamp default CURRENT_TIMESTAMP,
    modified_time_function timestamp default now(),
    fixed_time timestamp default '2004-01-01 00:00:00.000000-00',
    char1 char(1) default 'Y',
    char2 character varying(50) default 'a varchar field',
    char3 text default 'a text field',
    bigint_default bigint default 0::bigint,
    multiline_default text DEFAULT '--- []

'::text
);
_SQL

  execute <<_SQL
  CREATE TABLE postgresql_times (
    id SERIAL PRIMARY KEY,
    time_interval INTERVAL,
    scaled_time_interval INTERVAL(6)
  );
_SQL

  execute <<_SQL
  CREATE TABLE postgresql_oids (
    id SERIAL PRIMARY KEY,
    obj_id OID
  );
_SQL

  execute <<_SQL
  CREATE TABLE postgresql_timestamp_with_zones (
    id SERIAL PRIMARY KEY,
    time TIMESTAMP WITH TIME ZONE
  );
_SQL

  begin
    execute <<_SQL
    CREATE TABLE postgresql_partitioned_table_parent (
      id SERIAL PRIMARY KEY,
      number integer
    );
    CREATE TABLE postgresql_partitioned_table ( )
      INHERITS (postgresql_partitioned_table_parent);

    CREATE OR REPLACE FUNCTION partitioned_insert_trigger()
    RETURNS TRIGGER AS $$
    BEGIN
      INSERT INTO postgresql_partitioned_table VALUES (NEW.*);
      RETURN NULL;
    END;
    $$
    LANGUAGE plpgsql;

    CREATE TRIGGER insert_partitioning_trigger
      BEFORE INSERT ON postgresql_partitioned_table_parent
      FOR EACH ROW EXECUTE PROCEDURE partitioned_insert_trigger();
_SQL
  rescue ActiveRecord::StatementInvalid => e
    if e.message =~ /language "plpgsql" does not exist/
      execute "CREATE LANGUAGE 'plpgsql';"
      retry
    else
      raise e
    end
  end

  # This table is to verify if the :limit option is being ignored for text and binary columns
  create_table :limitless_fields, force: true do |t|
    t.binary :binary, limit: 100_000
    t.text :text, limit: 100_000
  end
end