In the documentation, I didn't find how I can put or retrieve multiple entities at once. further, by using GQL, I was not able to execute queries such select * from k where __ key __ in ('key1','key2','key3').
Can any one help me please, how I can insert/ retrieve multiple entities at once using java??
In Cloud Datastore, a
CommitRequest allow multiple keys and entities, respectively, to be specified. For example:
LookupRequest request = LookupRequest.newBuilder() .addKey(key1) .addKey(key2) .build();
CommitRequest request = CommitRequest.newBuilder() .setMode(CommitRequest.Mode.NON_TRANSACTIONAL) .setMutation(Mutation.newBuilder() .addInsert(entity1) .addInsert(entity2)) .build();
These are slight variations on the examples given on these pages: https://cloud.google.com/datastore/docs/concepts/entities#Datastore_Retrieving_an_entity https://cloud.google.com/datastore/docs/concepts/entities#Datastore_Creating_an_entity
Cloud Datastore GQL does not currently support
IN or writes.