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