Azure CosmosDb: Order-by item requires a range index

Question

I\'m performing a simple query via the Azure Portal \"Query Explorer\".

Here is my query:

SELECT * FROM c
WHERE c.DataType = \'Fruit\' 
AND c.ExperimentI         


        

Answer 1

ORDER BY is served directly from the index and thus it requires the order by item to be Range indexed (as opposed to Hash indexed).

While you could only index the order-by item as range (for both numbers and string), my advice is to index all paths as range with precision of -1.

Basically, you'd need to update the indexing policy of your collection to be something like this:

    {
        "automatic": true,
        "indexingMode": "consistent",
        "includedPaths": [
            {
                "path": "/", 
                "indexes": [ 
                    { "kind": "Range", "dataType": "Number", "precision": -1 }, 
                    { "kind": "Range", "dataType": "String", "precision": -1 }
                ]
            }
        ]
    }