SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t1
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier d2
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier d2.id
        Identifier t1.external_id
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier t1.id
     Literal UInt64_1
   Literal UInt64_1
