CODEWITHSUNDEEP
javafirebasefirebase-realtime-database
Shubhendu
Shubhendu

Reputation: 51

Firebase Realtime Database Download Data Size Problem

1.DatabaseReference db=FirebaseDatabase.getInstance().getReference("users");
1.Query query = db.orderByKey().equalTo(uid);
   
2.FirebaseDatabase.getInstance().getReference("users").orderByChild("token").equalTo(toKen)

Does any one of the above two codes written in Java Android Studio send the entire "users" node of Realtime Database to the client Android App or Only the the Fetched Records will be send to the client Android App. It Seems like that it sends the complete "users" node to the client Android App, because my realtime database bill is quite high and customers are low.

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Upvotes: 0

Views: 147

Answers (2)

Frank van Puffelen
Frank van Puffelen

Reputation: 598718

If the download size is higher than you'd expect based on the number of query results, check if you've defined an index on the token property. If no such index exists, Firebase will download all data under users to the client, and perform the sort/filter there. If an index is declared, the ordering/filtering is done on the server.

Upvotes: 1

Dharmaraj
Dharmaraj

Reputation: 50830

It seems you are looking for orderByChild(). To get the child node where the value of uid is equal to passed UID, try this:

DatabaseReference db=FirebaseDatabase.getInstance().getReference("users");

Query query = db.orderByChild("uid").equalTo(uid);

The documentation says,

Method Usage
orderByChild Order results by the value of a specified child key or nested child path.
orderByKey Order results by child keys.

The second query looks fine and should fetch the node where the value of token is equal to the supplied token.

Upvotes: 1

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