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Cancels any changes made during the current transaction.
SQLROLLBACK(nStatementHandle) |
Parameters
- nStatementHandle
- Specifies the statement handle to the data source returned by SQLCONNECT(В ).
Return Value
Numeric. SQLROLLBACK(В ) returns 1 if the transaction is successfully rolled back; otherwise, it returns -1. If SQLROLLBACK(В ) returns -1, you can use AERROR(В ) to determine why the transaction could not be rolled back.
Remarks
If manual transactions are in effect (the SQLSETPROP(В ) transaction property is set to manual), you can send multiple updates to remote tables. The updates can all be rolled back with SQLROLLBACK(В ).
Updates can be committed with SQLCOMMIT(В ).
Example
The following example assumes SQLCONNECT(В ) is successfully issued, and its return value is stored to a memory variable named gnHandle. SQLSETPROP(В ) is used to set the Transactions property to 2 (manual), making it possible for you to use SQLCOMMIT(В ) and SQLROLLBACK(В ).
The authors table is modified with SQLEXEC(В ), and the changes to the table are cancelled with SQLROLLBACK(В ).
| В |  Copy Code |
|---|---|
= SQLSETPROP(gnHandle, 'Transactions', 2) && manual
= SQLEXEC(gnHandle, "INSERT INTO authors (au_id, au_lname);
VALUES ('aupoe', 'Poe')")
= SQLROLLBACK(gnHandle) | |