pub fn case(
expr: Option<Arc<dyn PhysicalExpr>>,
when_thens: Vec<(Arc<dyn PhysicalExpr>, Arc<dyn PhysicalExpr>)>,
else_expr: Option<Arc<dyn PhysicalExpr>>,
) -> Result<Arc<dyn PhysicalExpr>, DataFusionError>Expand description
Create a CASE expression