Cloud Datastore Client - Class Aggregation (2.0.0-RC1)

Reference documentation and code samples for the Cloud Datastore Client class Aggregation.

Represents Aggregation properties.

Example:

$count = Aggregation::count();
$count->alias('count');
$count->limit(100);

echo json_encode($count->getProps());

Aggregations considers non existing property name as an empty query set

Set the aggregation alias.

Example:

$count = Aggregation->count();
$count->alias('total');

echo $count->props()['count']['alias'];

Get the array representation for the aggregation.

Creates count aggregation properties.

Example:

$count = Aggregation::count();

Creates sum aggregation properties.

Example:

$sum = Aggregate::sum('property_to_aggregate_upon');

Result of SUM aggregation can be a integer or a float. Sum of integers which exceed maxinum integer value returns a float. Sum of numbers exceeding max float value returns INF. Sum of data which contains NaN returns NaN. Non numeric values are ignored.

Creates average aggregation properties.

Example:

$avg = Aggregate::avg('property_to_aggregate_upon');

Result of AVG aggregation can be a float or a null. Average of empty valid data set return null. Average of numbers exceeding max float value returns INF. Average of data which contains NaN returns NaN. Non numeric values are ignored.