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Stored procedures
Configures the isolation mode of transactions for a connection to an HFSQL server.
Depending on the mode selected, an application that performs reading operations will have access or not to the data being modified in a transaction by another application, or another instance of the same application.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Versions 22 and later
Android Widget This function is now available in Android Widget mode.
Android This function is now available for Android applications.
Java This function is now available for Java applications.
New in version 22
Android Widget This function is now available in Android Widget mode.
Android This function is now available for Android applications.
Java This function is now available for Java applications.
Android Widget This function is now available in Android Widget mode.
Android This function is now available for Android applications.
Java This function is now available for Java applications.
Example
MyConnection is Connection
 
MyConnexion.TransactionIsolation(hReadCommitted)
MyCustomerFile.ReadFirst(MyKey)
Syntax
<Result> = <Connection>.TransactionIsolation(<Isolation mode>)
<Result>: Boolean
  • True if the isolation level was implemented,
  • False if an error occurred. HErrorInfo is used to identify the error.
<Connection>: Connection variable
Name of the Connection variable that describes the connection to an HFSQL server.
<Isolation mode>: Integer constant
Selected isolation mode:
hReadCommittedOnly the finalized transactions are visible by the other users.
hReadUncommittedThe non-finalized transactions are visible by the other users.
hRepeatableReadThe application in transaction sees a snapshot of the database when the transaction starts.
Component : wd250hf.dll
Minimum version required
  • Version 25
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