- Standard Parcel Header (SPH)
- Alternate Parcel Header (APH)
The maximum length of an SPH parcel is 65,535 bytes; the maximum length of an APH parcel is ~1 MB.
The format of the SPH shown in the following figure.
The format of the APH is shown in the following figure.
The two types of parcel headers may be intermixed in the same request or response. Parcels whose length is less than or equal to 65,535 may use either header format.
- A response only contains a parcel using APH if the APH-response-permitted option was specified and the database supports the alternate header for that parcel.
- dbcarea.consider_APH_resps must be set to ‘Y’ to receive APH responses.