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+As of 1.6.2, Asterisk now supports doing database transactions from the
+dialplan.  A number of new applications and functions have been introduced
+for this purpose and this document should hopefully familiarize you with
+all of them.
+
+First, the ODBC() function has been added which is used to set up all new
+database transactions.  Simply write the name of the transaction to this
+function, along with the arguments of "transaction" and the database name,
+e.g. Set(ODBC(transaction,postgres-asterisk)=foo).  In this example, the
+name of the transaction is "foo".  The name doesn't really matter, unless
+you're manipulating multiple transactions within the same dialplan, at the
+same time.  Then, you use the transaction name to change which transaction
+is active for the next dialplan function.
+
+The ODBC() function is also used to turn on a mode known as forcecommit.
+For most cases, you won't need to use this, but it's there.  It simply
+causes a transaction to be committed, when the channel hangs up.  The other
+property which may be set is the isolation property.  Please consult with
+your database vendor as to which values are supported by their ODBC driver.
+Asterisk supports setting all standard ODBC values, but many databases do
+not support the entire complement.
+
+Finally, when you have run multiple statements on your transaction and you
+wish to complete the transaction, use the ODBC_Commit and ODBC_Rollback
+applications, along with the transaction ID (in the example above, "foo")
+to commit or rollback the transaction.  Please note that if you do not
+explicitly commit the transaction or if forcecommit is not turned on, the
+transaction will be automatically rolled back at channel destruction (after
+hangup) and all related database resources released back to the pool.