public final class GqlQuery<V> extends Query<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.
| Type | Description |
| boolean |
equals(Object obj)
public boolean equals(Object obj)| Name | Description |
| obj | Object |
| Type | Description |
| boolean |
getNamedBindings()
public Map<String,Object> getNamedBindings()Returns an immutable map of named bindings.
| Type | Description |
| Map<String,Object> |
getNumberArgs()
public List<Object> getNumberArgs()Returns an immutable list of positional bindings (using original order).
| Type | Description |
| List<Object> |
getQueryString()
public String getQueryString()Returns the query string for this query.
| Type | Description |
| String |
hashCode()
public int hashCode()| Type | Description |
| int |
toString()
public String toString()| Type | Description |
| String |