While using the DB Access Module for SybaseCT, the database callbacks are invoked with respect to the allocation and deallocation of SybaseCT Context Handle CS_CONTEXT. The connection callbacks are invoked with respect to the allocation, deallocation, connect and disconnect of the SybaseCT Connection Handle CS_CONNECTION. Please refer to the DB Interface Module User's Guide for more information.
While using the XA Access Module for SybaseCT, we do not allocate and deallocate CS_CONTEXT and CS_CONNECTION handles, but just fetch them. Hence, the database callbacks are invoked before and after fetching the CS_CONTEXT. Callbacks preConnAllocate, postConnAllocate and preConnect are called before fetching the CS_CONNECTION. Callback postConnect is called after fetching the CS_CONNECTION.
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