The xa_start() function

In each transaction, when an XA data source registers statically with the HCL Informix® transaction, HCL Informix runs the xa_start() function.

The syntax for the function is:

mint xa_start(XID *xid,   /* IN */
           mint rmid,     /* IN */
           int4 flags)   /* IN */

Table 1. The xa_start() parameters
Parameter	Description
xid	Pointer to the XID data structure that is defined in the xa.h file and used for the current transaction
rmid	Unique resource manager identifier
flags	`TMNOFLAGS`, which is the valid value

For valid return values, refer to X/Open information, including Distributed Transaction Processing: The XA Specification.

Currently, HCL Informix does not call the xa_start() function because the XA data source must be created with the TMREGISTER flag.