Reference documentation and code samples for the Cloud Datastore V1 Client class Aggregation.
Defines a aggregation that produces a single result.
Generated from protobuf message google.datastore.v1.AggregationQuery.Aggregation
Methods
__construct
Constructor.
Parameters | |
---|---|
Name | Description |
data |
array
Optional. Data for populating the Message object. |
↳ count |
Google\Cloud\Datastore\V1\AggregationQuery\Aggregation\Count
Count aggregator. |
↳ alias |
string
Optional. Optional name of the property to store the result of the aggregation. If not provided, Datastore will pick a default name following the format |
getCount
Count aggregator.
Returns | |
---|---|
Type | Description |
Google\Cloud\Datastore\V1\AggregationQuery\Aggregation\Count|null |
hasCount
setCount
Count aggregator.
Parameter | |
---|---|
Name | Description |
var |
Google\Cloud\Datastore\V1\AggregationQuery\Aggregation\Count
|
Returns | |
---|---|
Type | Description |
$this |
getAlias
Optional. Optional name of the property to store the result of the aggregation.
If not provided, Datastore will pick a default name following the format
property_<incremental_id++>
. For example:
AGGREGATE
COUNT_UP_TO(1) AS count_up_to_1,
COUNT_UP_TO(2),
COUNT_UP_TO(3) AS count_up_to_3,
COUNT_UP_TO(4)
OVER (
...
);
becomes:
AGGREGATE
COUNT_UP_TO(1) AS count_up_to_1,
COUNT_UP_TO(2) AS property_1,
COUNT_UP_TO(3) AS count_up_to_3,
COUNT_UP_TO(4) AS property_2
OVER (
...
);
Requires:
- Must be unique across all aggregation aliases.
- Conform to entity property name limitations.
Returns | |
---|---|
Type | Description |
string |
setAlias
Optional. Optional name of the property to store the result of the aggregation.
If not provided, Datastore will pick a default name following the format
property_<incremental_id++>
. For example:
AGGREGATE
COUNT_UP_TO(1) AS count_up_to_1,
COUNT_UP_TO(2),
COUNT_UP_TO(3) AS count_up_to_3,
COUNT_UP_TO(4)
OVER (
...
);
becomes:
AGGREGATE
COUNT_UP_TO(1) AS count_up_to_1,
COUNT_UP_TO(2) AS property_1,
COUNT_UP_TO(3) AS count_up_to_3,
COUNT_UP_TO(4) AS property_2
OVER (
...
);
Requires:
- Must be unique across all aggregation aliases.
- Conform to entity property name limitations.
Parameter | |
---|---|
Name | Description |
var |
string
|
Returns | |
---|---|
Type | Description |
$this |
getOperator
Returns | |
---|---|
Type | Description |
string |