HTransactionInterrupted (Function)

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Managing databases

Managing transactions

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Prefix syntax

HTransactionInterrupted

Presentation

Example

Handling records during a transaction

Transactions and independent HFSQL context

See also

HTransactionInterrupted (Function)

In french: HTransactionInterrompue

Available only with these kinds of connection

Allows you to find out whether a transaction was interrupted (the transaction was neither validated nor canceled). The characteristics of the interrupted transaction are returned by the HFSQL variables.

We advise you to call this function in the initialization code of project. If the transaction is interrupted, you can:

start WDTRANS or WDOptimizer.
start the HFSQL Control Center.
cancel the transaction through programming.

This function is useful when transactions have been interrupted on password-protected data files.

The management of transactions is available for HFSQL Client/Server databases.

Example

IF HTransactionInterrupted("") = True THEN
HTransactionCancel()
END

Syntax

<Result> = HTransactionInterrupted([<Transaction file>])

<Result>: Boolean

True if a transaction was interrupted,
False if no transaction was interrupted. The following HFSQL variables are updated:
H.TrsApplicationName Value if the transaction was interrupted: Application name in the following format: Executable Name(Project Name).
Value if the transaction was not interrupted: Empty string ("").
Remark: This variable is available in HFSQL Client/Server mode only.
H.TrsInternalID Value if the transaction was interrupted: Internal number used to identify the transaction.
Value if the transaction was not interrupted: -1
H.TrsMachineName Value if the transaction was interrupted: Name and IP address of client computer.
Value if the transaction was not interrupted: Empty string ("").
Remark: This variable is available in HFSQL Client/Server mode only.
H.TrsPost Value if the transaction was interrupted: Identifier defined by the HComputer function or name of the machine from which the transaction was started.
Value if the transaction was not interrupted: Empty string ("")

<Transaction file>: Optional character string

Full name of transaction file (used to store the operations performed in transaction). This file is automatically destroyed when using the HTransactionEnd or HTransactionCancel functions.
If this name corresponds to an empty string ("") or if it is not specified, the transaction file used is the default transaction file (in the directory of the application named: <Project Name>_$TRS_OPERATION.trs).
This parameter is ignored by the Client/Server transactions, it is only taken into account by the HFSQL Classic transactions.

Remarks

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 HTransactionStart (or HTransaction) to start a transaction in the new context.

Business / UI classification: Business Logic

Component: wd270hf.dll