SSTRANSTIGHTLYCPLD Field (SQLServerXAResource)
Used to allow the tightly coupled XA transactions, which have different XA branch transaction IDs (XIDs) but have the same global transaction ID (GTRID).
Each transaction is identified by an XA branch transaction ID (XID) and a global transaction ID (GTRID). In order to allow the applications to use tightly coupled XA transactions that have different XIDs but have the same GTRID, you must set the SSTRANSTIGHTLYCPLD on the flags parameter of the XAResource.start method. For more information about how to use this flag, see Understanding XA Transactions.