abhioncbr opened a new issue, #11743:
URL: https://github.com/apache/pinot/issues/11743
`ScalarTransformFunctionWrapper` throws an exception for any transformation
function with `Object` return type. for example, `casewhen` or `cast`
Here is one such stack trace:
```bash
java.lang.IllegalStateException: Cannot convert ColumnDataType: OBJECT to
DataType
at
org.apache.pinot.common.utils.DataSchema$ColumnDataType.toDataType(DataSchema.java:311)
at
org.apache.pinot.core.operator.transform.function.ScalarTransformFunctionWrapper.<init>(ScalarTransformFunctionWrapper.java:69)
at
org.apache.pinot.core.operator.transform.function.TransformFunctionFactory.get(TransformFunctionFactory.java:316)
at
org.apache.pinot.core.operator.transform.function.TransformFunctionFactory.get(TransformFunctionFactory.java:347)
```
this was introduced with the
[PR](https://github.com/apache/pinot/pull/11453), [specific code
change](https://github.com/apache/pinot/commit/6c69be463fea9ba9c0fe0103215f47581d41f8d4#diff-689152b23aca017e750b7828a4f12e3dad5e5deb523e423bb53a3b933aca77c2R68)
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