dbs/db4/allow_cancel is a SAP Parameter attribute which is used to control Allow cancel of SQL operations using 'Stop Transaction' information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
dbs/db4/allow_cancel profile paramerter attributes
Parameter Name: dbs/db4/allow_cancel
Description: Allow cancel of SQL operations using 'Stop Transaction'
Default Value:
Parameter Type ( See
IF_PARAMETER_TYPES)
: String(STRING)
Restriction Values:
Parameter Unit:
Parameter Group: Database
CSN Component: BC-DB-DB4
System-Wide parameter: No
Dynamic Parameter: No
Vector Parameter: No
Has Sub-Parameters: No
Check Function Exists: No
Parameter documentation
If enabled, DBSL will attempt a SQL Cancel on a (long-running) SQL
operation if instructed to do so by the dispatcher, e.g. on a "stop
transaction" request. Otherwise, the dispatcher will instead end the
work process.
If dbs/db4/driver_type> = XDA, parameter
dbs/db4/allow_cancel = 1 will cause usage of Unix domain sockets if
application server and database server reside on the same host, TCP/IP
otherwise. Otherwise, if dbs/db4/allow_cancel = 0, a local connect is
chosen.
If dbs/db4/driver_type> = XDN, the
connect_type is not influenced.
For more information, see SAP Note 705887 and 494086.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.