CreateQuery decimal_dt (children 3)
 Identifier decimal_dt
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration timestamp (children 1)
    DataType DateTime64 (children 1)
     ExpressionList (children 1)
      Literal UInt64_9
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier timestamp
