snowflake.snowpark.CaseExpr.when¶ CaseExpr.when(condition: Union[Column, str], value: Union[Column, None, bool, int, float, str, bytearray, Decimal, date, datetime, time, bytes, NaTType, float64, list, tuple, dict]) → CaseExpr[source]¶ Appends one more WHEN condition to the CASE expression. Parameters: condition – A Column expression or SQL text representing the specified condition. value – A Column expression or a literal value, which will be returned if condition is true.