CreateQuery t (children 3)
 Identifier t
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration timestamp (children 1)
    DataType DateTime
   ColumnDeclaration day (children 1)
    Function toYYYYMMDD (children 1)
     ExpressionList (children 1)
      Identifier timestamp
 Storage definition (children 2)
  Function MergeTree
  Identifier timestamp
