CreateQuery test_vertical_merge (children 3)
 Identifier test_vertical_merge
 Columns definition (children 2)
  ExpressionList (children 3)
   ColumnDeclaration k (children 1)
    DataType UInt64
   ColumnDeclaration val1 (children 1)
    DataType UInt64
   ColumnDeclaration val2 (children 1)
    DataType UInt64
  ExpressionList (children 2)
   Index (children 2)
    Function multiply (children 1)
     ExpressionList (children 2)
      Identifier val1
      Identifier val2
    Function minmax (children 1)
     ExpressionList
   Index (children 2)
    Function multiply (children 1)
     ExpressionList (children 2)
      Identifier val1
      Identifier k
    Function minmax (children 1)
     ExpressionList
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier k
  Set
