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# frozen_string_literal: true
class AddFunctionForInsertingDeletedRecords < ActiveRecord::Migration[6.1]
include Gitlab::Database::MigrationHelpers
include Gitlab::Database::MigrationHelpers::LooseForeignKeyHelpers
def up
execute(<<~SQL)
CREATE FUNCTION #{DELETED_RECORDS_INSERT_FUNCTION_NAME}()
RETURNS TRIGGER AS
$$
BEGIN
INSERT INTO loose_foreign_keys_deleted_records
(deleted_table_name, deleted_table_primary_key_value)
SELECT TG_TABLE_NAME, old_table.id FROM old_table
ON CONFLICT DO NOTHING;
RETURN NULL;
END
$$ LANGUAGE PLPGSQL
SQL
end
def down
drop_function(DELETED_RECORDS_INSERT_FUNCTION_NAME)
end
end
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