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  • Error cases
  • Handling records during a transaction
  • Transactions and independent HFSQL context
  • OLE DB and Native Connectors
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Stored procedures
Validates the current transaction:
Example
MyConnection1 is Connection
 
// Start transaction on data files associated with MyConnection1
MyConnection1.TransactionStart()
 
// Code used to prepare the order to added
// ...
 
WHEN EXCEPTION IN
// Add the order
Order.Add()
// Validate the addition
MyConnection1.TransactionEnd()
DO
// Delete the order lines
MyConnection1.TransactionCancel()
END
Syntax

Validating a transaction in progress on a connection Hide the details

<Result> = <Connection>.TransactionEnd()
<Result>: Boolean
  • True if the transaction is ended,
  • False if a problem occurs. HErrorInfo returns more details about the error.
Caution: The function has no effect if a global transaction is started. The syntax 2 must be used.
<Connection>: Connection variable
Name of the Connection variable that describes the connection to use.

Validating a global transaction in progress Hide the details

<Result> = TransactionEnd()
<Result>: Boolean
  • True if the transaction is ended,
  • False if a problem occurs. HErrorInfo returns more details about the error.
Remarks

Error cases

  • Nesting transactions: Transactions cannot be nested (i.e. <Connection variable>.TransactionStart or <Connection variable>.Transaction cannot be called in a transaction). In this case, error 70031 occurs.
  • A fatal error is displayed in the following cases:
    • A transaction is started on all the connections while there is at least one connection in transaction.
    • A transaction is started on a connection while a transaction was already started on all the connections.
    • A transaction is started on all the connections while there is at least one connection whose isolation mode is not "Read Uncommitted".

Handling records during a transaction

During a transaction, some rules must be complied with when handling the records. For more details, see Transactions: Handling records during a transaction.

Transactions and independent HFSQL context

When copying a context, if a transaction is in progress on the first context, the new context is not in transaction. You must call <Connection variable>.TransactionStart (or <Connection variable>.Transaction) to start a transaction in the new context.
WEBDEV - Server codeOLE DBNative Connectors (Native Accesses)

OLE DB and Native Connectors

Only syntaxes with connection are taken into account by the Native Connectors (also called Native Accesses) that support transactions. You can also use SQLTransaction.
Component: wd290hf.dll
Minimum version required
  • Version 25
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Last update: 07/06/2023

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