woocommerce_reports_get_order_report_query │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_reports_get_order_report_query', 'wp_kama_woocommerce_reports_get_order_report_query_filter' );

/**
 * Function for `woocommerce_reports_get_order_report_query` filter-hook.
 * 
 * @param  $query 
 *
 * @return 
 */
function wp_kama_woocommerce_reports_get_order_report_query_filter( $query ){

	// filter...
	return $query;
}

$query

-

Where the hook is called

$query = apply_filters( 'woocommerce_reports_get_order_report_query', $query );

Where the hook is used in WooCommerce