CreateQuery t0 (children 3)
 Identifier t0
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Function rowNumberInAllBlocks (children 1)
      ExpressionList
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 1)
           ExpressionList (children 1)
            Function toLowCardinality (children 1)
             ExpressionList (children 1)
              Function arrayJoin (children 1)
               ExpressionList (children 1)
                Literal Array_[\'exchange\', \'tables\']