$wpdb;

		$collate = $wpdb->has_cap( 'collation' ) ? $wpdb->get_charset_collate() : '';

		return "CREATE TABLE {$this->lookup_table_name} (
 product_id bigint(20) NOT NULL,
 product_or_parent_id bigint(20) NOT NULL,
 taxonomy varchar(32) NOT NULL,
 term_id bigint(20) NOT NULL,
 is_variation_attribute tinyint(1) NOT NULL,
 in_stock tinyint(1) NOT NULL,
 INDEX is_variation_attribute_term_id (is_variation_attribute, term_id),
 INDEX taxonomy_term_id_in_stock_product_or_parent_id (taxonomy, term_id, in_stock, product_or_parent_id),
 PRIMARY KEY  ( `product_or_parent_id`, `term_id`, `product_id`, `taxonomy` ),
 KEY product_id (product_id)
) $collate;";
	}

	/**
	 * Create the primary key for the table if it doesn't exist already.
	 * It also deletes the product_or_parent_id_term_id index if it exists, since it's now redundant.
	 *
	 * @return void
	 */
	public function create_table_primary_index() {
		$database_util = wc_get_container()->get( DatabaseUtil::class );
		$database_util->create_primary_key( $this->lookup_table_name, array( 'product_or_parent_id', 'term_id', 'product_id', 'taxonomy' ) );
		$database_util->drop_table_index( $this->lookup_table_name, 'product_or_parent_id_term_id' );

		if ( empty( $database_util->get_index_columns( $this->lookup_table_name ) ) ) {
			wc_get_logger()->error( "The creation of the primary key for the {$this->lookup_table_name} table failed" );
		}

		if ( ! empty( $database_util->get_index_columns( $this->lookup_table_name, 'product_or_parent_id_term_id' ) ) ) {
			wc_get_logger()->error( "Dropping the product_or_parent_id_term_id index from the {$this->lookup_table_name} table failed" );
		}
	}

	/**
	 * Run additional setup needed after a WooCommerce install or update finishes.
	 *
	 * @internal For exclusive usage of WooCommerce core, backwards compatibility not guaranteed.
	 */
	public function run_woocommerce_installed_callback() {
		// The table must exist at this point (created via dbDelta), but we check just in case.
		if ( ! $this->data_store->check_lookup_table_exists() ) {
			return;
		}

		// If a table regeneration is in progress, leave it alone.
		if ( $this->data_store->regeneration_is_in_progress() ) {
			return;
		}

		// If the lookup table has data, or if it's empty because there are no products yet, we're good.
		// Otherwise (lookup table is empty but products exist) we need to initiate a regeneration if one isn't already in progress.
		if ( $this->data_store->lookup_table_has_data() || ! $this->get_last_existing_product_id() ) {
			$must_enable = get_option( 'woocommerce_attribute_lookup_enabled' ) !== 'no';
			$this->delete_all_attributes_lookup_data( false );
			update_option( 'woocommerce_attribute_lookup_enabled', $must_enable ? 'yes' : 'no' );
		} else {
			$this->initiate_regeneration();
		}
	}
}