CreateQuery testtable (children 3)
 Identifier testtable
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration DT (children 1)
    DataType Datetime
   ColumnDeclaration Label1 (children 1)
    DataType String
   ColumnDeclaration Value (children 1)
    DataType UInt64
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier DT
  Identifier Label1