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Class GqlQuery<V> (2.23.0)
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Version 2.23.0 keyboard_arrow_down
public final class GqlQuery<V> extends Query<V> implements RecordQuery<V>
A Google Cloud Datastore GQL query.
A usage example:
When the type of the results is known the preferred usage would be:
Query<Entity> query =
Query.newGqlQueryBuilder(Query.ResultType.ENTITY, "select * from kind").build();
QueryResults<Entity> results = datastore.run(query);
while (results.hasNext()) {
Entity entity = results.next();
...
}
When the type of the results is unknown you can use this approach:
Query query = Query.newGqlQueryBuilder("select __key__ from kind").build();
QueryResults results = datastore.run(query);
if (Key.class.isAssignableFrom(results.getResultClass())) {
QueryResults<Key> keys = (QueryResults<Key>) results;
while (keys.hasNext()) {
Key key = keys.next();
...
}
}
See Also: GQL Reference
Type Parameter
Name
Description
V
Methods
allowLiteral()
public boolean allowLiteral()
Returns whether the query string can contain literals. When false
, the query string
must not contain any literals and instead must bind all values.
equals(Object obj)
public boolean equals(Object obj)
Parameter
Name
Description
obj
Object
Overrides
getNamedBindings()
public Map<String,Object> getNamedBindings()
Returns an immutable map of named bindings.
getNamedBindingsMap()
public Map<String,GqlQuery.Binding> getNamedBindingsMap()
Returns
Type
Description
Map <String ,com.google.cloud.datastore.GqlQuery.Binding >
getNumberArgs()
public List<Object> getNumberArgs()
Returns an immutable list of positional bindings (using original order).
getPositionalBindingsMap()
public List<GqlQuery.Binding> getPositionalBindingsMap()
Returns
Type
Description
List <com.google.cloud.datastore.GqlQuery.Binding >
getQueryString()
public String getQueryString()
Returns the query string for this query.
Returns
Type
Description
String
getType()
public Query.ResultType<V> getType()
hashCode()
Returns
Type
Description
int
Overrides
nextQuery(RunQueryResponse responsePb)
public RecordQuery<V> nextQuery(RunQueryResponse responsePb)
populatePb(RunQueryRequest.Builder requestPb)
public void populatePb(RunQueryRequest.Builder requestPb)
toString()
Returns
Type
Description
String
Overrides
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Last updated 2024-11-19 UTC.
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