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Get the number of distinct values of a field

Last updated: 9/3/2026

Get the number of distinct values (cardinal) of a field by using the GetCardinal method.

The handle of the request is 2 because the handle of the field is 2.

The client sends:

{ "jsonrpc": "2.0", "id": 2, "method": "GetCardinal", "handle": 2, "params": [] }

The engine returns:

{ "jsonrpc": "2.0", "id": 2, "result": { "qReturn": 22 } }

The number of distinct values of the field is 22.

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