SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier a
        Function round (children 1)
         ExpressionList (children 2)
          Identifier a
          Literal UInt64_2
      Function quantilesDDMerge (children 2)
       ExpressionList (children 1)
        Identifier sketch
       ExpressionList (children 2)
        Literal Float64_0.001
        Literal Float64_0.9
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 02919_ddsketch_quantile
