CreateQuery buf_dest (children 3)
 Identifier buf_dest
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration timestamp (children 1)
    DataType DateTime
 Storage definition (children 3)
  Function MergeTree
  Function toYYYYMMDD (children 1)
   ExpressionList (children 1)
    Identifier timestamp
  Identifier timestamp
