The standard parcel header format (SPH) contains a 2-byte flavor field and a 2-byte length field. This format limits the length of the parcel to 65536 bytes.
The alternate parcel header (APH), extends the limit to 1 MB. The APH format contains a 2-byte flavor field, a 2-byte reserved field, and a 4-byte length field.
dbcarea.consider_APH_resps must be set to ‘Y’ to receive APH
responses.
The following table lists the parcel flavor, name, and description.
| Parcel Flavor | Name | Description |
|---|---|---|
| 1 | Req | Record mode request parcel |
| 2 | RunStartup | Startup parcel |
| 3 | Data | Data parcel |
| 4 | Resp | Response parcel |
| 5 | KeepResp | Keep response parcel |
| 7 | Cancel | Cancel parcel sent to cancel the stored procedures multi-tsr parcel |
| 13 | FMReq | Field mode request parcel |
| 14 | FMRunStartup | Field mode startup request |
| 32 | NOP | No operation parcel |
| 68 | IndicData | Data parcel containing indicator bytes |
| 69 | IndicReq | Indicator mode request parcel |
| 71 | DataInfo | Data info parcel |
| 72 | IVRunStartup | Indicator mode startup request |
| 85 | Options | Parcel for request |
| 120 | CursorHost | Cursor parcel sent by host |
| 128 | MultiTsr | Multi TSR parcel used by stored procedures |
| 129 | SPOptions | Stored procedures options parcel |
| 140 | MultipartData | MultipartData parcel |
| 141 | EndMultipartData | End MultipartData parcel |
| 142 | MultipartIndicData | Multipart Indic data parcel |
| 143 | EndMultipartIndicData | End Multipart Indic data parcel |
| 146 | DataInfoX | Datainfox parcel |
| 147 | MultipartRunStartup | MultipartRunStartup parcel |
| 148 | MultipartRequest | MultipartRequest parcel |
| 153 | ExtResp | New extended response parcel |
| 154 | ExtKeepResp | New extended keep response parcel |
| 157 | SETPOSITION | Cursor positioning request |
| 158 | ROWPOSITION | Row position to which cursor needs to be repositioned. |
| 159 | OFFSETPOSITION | From where the LOB data should be returned. |