caseWhen.md

description
This section contains reference documentation for the caseWhen function.

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)

Arguments	Description
booleanExpr1	A boolean expression
valueIfExpr1True, valueIfExpr2True	A value to return.

Usage Examples

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

{
  "latitude": 1.0
}

Expression	Value
CASEWHEN(latitude > 0, 'North', 'South')	North
CASEWHEN(latitude > 0, 1, 0)	1

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

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