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Stored procedures
Allows you to find out whether a lock error occurred. This function must be used for custom management of locks and modification conflicts.
Note: An automatic management of lock errors and modification conflicts is performed by default (except in the code of stored procedures). This assisted management of errors can be customized or disabled at any time by HOnError.
Windows Mobile This function can be used with HFSQL Client/Server data files or with data files handled by Native Accesses. This function is not available for HFSQL Mobile.
Versions 16 and later
Java This function is now available for the Java applications.
New in version 16
Java This function is now available for the Java applications.
Java This function is now available for the Java applications.
Versions 17 and later
iPhone/iPad This function is now available for the iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for the iPhone/iPad applications.
iPhone/iPad This function is now available for the iPhone/iPad applications.
Versions 18 and later
Android Widget This function is now available in Android Widget mode.
Android This function is now available for the Android applications (for the HFSQL data files).
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Android Widget This function is now available in Android Widget mode.
Android This function is now available for the Android applications (for the HFSQL data files).
Universal Windows 10 App This function is now available in Windows Store apps mode.
Android Widget This function is now available in Android Widget mode.
Android This function is now available for the Android applications (for the HFSQL data files).
Universal Windows 10 App This function is now available in Windows Store apps mode.
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.
Note: From version 19, HFSQL is the new name of HyperFileSQL.
Example
// Read the first record
HReadFirst(Customer, Name)
// Lock error?
IF HErrorLock() = True THEN
Error("A lock error was detected")
END
Syntax
<Result> = HErrorLock()
<Result>: Boolean
  • True if a lock error occurred,
  • False otherwise (no error).
Remarks
  • No automatic management of locks is available for the Memo or Binary Memo items.
  • Once a locked record was read, no read operation is performed on the data file:
    • HErrorLock returns True.
    • HOut returns True.
      Therefore, if this reading is performed in a browse loop on a HFSQL data file, this browse is interrupted.
      The H.NbRetry variable indicates the number of attempts to lock the data file or record before giving control back to the program (in multi-user mode only)
Components
WINDEVWEBDEV - Server codeReports and Queries wd230hf.dll
Windows Mobile wp230hf.dll
Java wd230java.jar
Linux wd230hf.so
Android wd230android.jar
Minimum required version
  • Version 9
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