SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function uniqMergeIf (children 1)
     ExpressionList (children 2)
      Identifier B
      Function or (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier A
          Literal \'1\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier A
          Literal \'2\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier A
          Literal \'3\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function cluster (children 1)
       ExpressionList (children 3)
        Identifier test_cluster_two_shards
        Function currentDatabase (children 1)
         ExpressionList
        Identifier t_transform_or
   Set
