Function build_single_column_expr 

fn build_single_column_expr(
    column: &Column,
    schema: &Schema,
    required_columns: &mut RequiredColumns,
    is_not: bool,
) -> Option<Arc<dyn PhysicalExpr>>

Given a column reference to column, returns a pruning expression in terms of the min and max that will evaluate to true if the column may contain values, and false if definitely does not contain values