CreateQuery tdt (children 3)
 Identifier tdt
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType Int16
   ColumnDeclaration dt (children 1)
    DataType DateTime
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier id
