SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function L2SquaredDistance (children 1)
     ExpressionList (children 2)
      Identifier v
      Literal Array_[UInt64_0, UInt64_0, UInt64_0]
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier vec1