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Returns a numeric value indicating the current transaction level.
TXNLEVEL(В ) |
Return Value
Numeric
Remarks
Use BEGIN TRANSACTION to create a transaction. Transactions are nested by issuing BEGIN TRANSACTION when another transaction is in progress. Transactions can be nested in this manner to five levels. Use TXNLEVEL(В ) to determine the current transaction level.
TXNLEVEL(В ) returns a value from 0 to 5. TXNLEVEL(В ) returns 0 if a transaction is not in progress.
Example
In the following example, the customer table in the testdata database is opened. BEGIN TRANSACTION is issued to start a transaction, and TXNLEVEL(В ) is used to display the transaction level (1). BEGIN TRANSACTION is issued again to start a nested transaction, and TXNLEVEL(В ) displays 2 for the current transaction level.
| В |  Copy Code |
|---|---|
CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')
USE Customer && Open customer table
CLEAR
BEGIN TRANSACTION
tLevel = ALLTRIM(STR(TXNLEVEL()))
=MESSAGEBOX("Current Transaction: " + tLevel, 0, "Trasaction Level")
BEGIN TRANSACTION
tLevel = ALLTRIM(STR(TXNLEVEL()))
=MESSAGEBOX("Current Transaction: " + tLevel, 0, ;
"Trasaction Level")
END TRANSACTION
END TRANSACTION | |