woocommerce/plugins/woocommerce-admin/docs/data.md

Data

WooCommerce Admin data stores implement the SqlQuery class.

SqlQuery Class

The SqlQuery class is a SQL Query statement object. Its properties consist of

• A context string identifying the context of the query.
• SQL clause (type) string arrays used to construct the SQL statement:
  • select
  • from
  • right_join
  • join
  • left_join
  • where
  • where_time
  • group_by
  • having
  • order_by
  • limit

Reports Data Stores

The base DataStore Automattic\WooCommerce\Admin\API\Reports\DataStore extends the SqlQuery class. The implementation data store classes use the following SqlQuery instances:

Data Store	Context	Class Query	Sub Query	Interval Query	Total Query
Categories	categories	Yes	Yes	-	-
Coupons	coupons	Yes	Yes	-	-
Coupon Stats	coupon_stats	Yes	-	Yes	Yes
Customers	customers	Yes	Yes	-	-
Customer Stats	customer_stats	Yes	-	Yes	Yes
Downloads	downloads	Yes	Yes	-	-
Download Stats	download_stats	Yes	-	Yes	Yes
Orders	orders	Yes	Yes	-	-
Order Stats	order_stats	Yes	-	Yes	Yes
Products	products	Yes	Yes	-	-
Product Stats	product_stats	Yes	-	Yes	Yes
Taxes	taxes	Yes	Yes	-	-
Tax Stats	tax_stats	Yes	-	Yes	Yes
Variations	variations	Yes	Yes	-	-

Query contexts are named as follows:

• Class Query = Class Context
• Sub Query = Class Context + _subquery
• Interval Query = Class Context + _interval
• Total Query = Class Context + _total

Filters

When getting the full statement the clause arrays are passed through two filters where $context is the query object context and $type is:

• select
• from
• join = right_join + join + left_join
• where = where + where_time
• group_by
• having
• order_by
• limit

The filters are:

• apply_filters( "wc_admin_clauses_{$type}", $clauses, $context );
• apply_filters( "wc_admin_clauses_{$type}_{$context}", $clauses );

Example usage

add_filter( 'wc_admin_clauses_product_stats_select_total', 'my_custom_product_stats' );
/**
 * Add sample data to product stats totals.
 *
 * @param array $clauses array of SELECT clauses.
 * @return array
 */
function my_custom_product_stats( $clauses ) {
	$clauses[] = ', SUM( sample_column ) as sample_total';
	return $clauses;
}