caseWhen

Returns values depending on boolean expressions. This function can only be used in an ingestion transformation function.

Signature

caseWhen(booleanExpr1, valueIfExpr1True, booleanExpr2, valueIfExpr2True) caseWhen(booleanExpr1, valueIfExpr1True, booleanExpr2, valueIfExpr2True, ... ,valueIfFalse)

Usage Examples

The usage examples are based on extracting fields from the following JSON documents:

{
  "latitude": 1.0
}

This function can be used in the table config to add northernHemisphere column:

{
   "tableConfig":{
      "ingestionConfig":{
         "transformConfigs":[
            {
               "columnName":"northernHemisphereStr",
               "transformFunction":"CASEWHEN(latitude > 0, 'North', 'South')"
            }
         ]
      }
   }
}