SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier id1
    Identifier id2
    Identifier id3
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab2
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier v
     Function modulo (children 1)
      ExpressionList (children 2)
       Function rand (children 1)
        ExpressionList
       Literal UInt64_10000
