public function parse_id_field( $value ) {
		global $wpdb;

		$id = absint( $value );

		if ( ! $id ) {
			return 0;
		}

		// See if this maps to an ID placeholder already.
		$original_id = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM {$wpdb->postmeta} WHERE meta_key = '_original_id' AND meta_value = %s;", $id ) ); // WPCS: db call ok, cache ok.

		if ( $original_id ) {
			return absint( $original_id );
		}

		// Not updating? Make sure we have a new placeholder for this ID.
		if ( ! $this->params['update_existing'] ) {
			$mapped_keys      = $this->get_mapped_keys();
			$sku_column_index = absint( array_search( 'sku', $mapped_keys, true ) );
			$row_sku          = isset( $this->raw_data[ $this->parsing_raw_data_index ][ $sku_column_index ] ) ? $this->raw_data[ $this->parsing_raw_data_index ][ $sku_column_index ] : '';
			$id_from_sku      = $row_sku ? wc_get_product_id_by_sku( $row_sku ) : '';

			// If row has a SKU, make sure placeholder was not made already.
			if ( $id_from_sku ) {
				return $id_from_sku;
			}

			$product = wc_get_product_object( 'simple' );
			$product->set_name( 'Import placeholder for ' . $id );
			$product->set_status( 'importing' );
			$product->add_meta_data( '_original_id', $id, true );

			// If row has a SKU, make sure placeholder has it too.
			if ( $row_sku ) {
				$product->set_sku( $row_sku );
			}
			$id = $product->save();
		}

		return $id && ! is_wp_error( $id ) ? $id : 0;
	}