SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 2) Identifier id Function L1Norm (children 1) ExpressionList (children 1) Function materialize (children 1) ExpressionList (children 1) Literal Array_[Float64_5, Float64_6] TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier vec1f