ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

Using the Control Centers in Client/Server mode
All the Control Centers provided with WINDEV, WEBDEV and WINDEV Mobile use the same database...
Installing an HFSQL Client/Server server with an application
When creating the setup program of a WINDEV application using HFSQL Client/Server data files, the wizard allows you to...
User Groupware and Client/Server data files
Applications using the User Groupware are compatible with HFSQL databases in Client/Server mode...
HFSQL Client/Server: Overview
You have the ability to create applications that access the HFSQL Client/Server databases...
HFSQL Client/Server: Backing up databases
Like for any database, backups of your HFSQL Client/Server databases must be performed on a regular basis...
HFSQL Client/Server database: Recommendations
This help page presents the main recommendations for optimizing the security and performance of an HFSQL Client/Server database according to the constraints and desired features...
User Groupware and Client/Server data files
An application that uses the User Groupware can be used with an HFSQL database in Client/Server mode...
How to backup HFSQL Client/Server databases?
The backup of the HFSQL Client/Server databases can be performed ...
Restoring an HFSQL Client/Server database
A backup of an HFSQL Client/Server database can be restored at any time...
HFSQL Client/Server functions (prefix syntax)
Several HFSQL functions are used to manage the HFSQL Client/Server data...
HFSQL Client/Server functions
Several HFSQL functions are used to manage the HFSQL Client/Server data...
Unalterable data files
This feature is used to signal that a data file cannot be modified after writing...
WDLog: Backup of HFSQL data files
WDLog allows you to save all the HFSQL data files used by a WINDEV or WEBDEV application...
HCheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
HManageServerUpdate (Function)
Allows you to manage the automatic update of HFSQL Client/Server servers and to define how often to check for updates.
<Connection variable>.SendMessageToClient (Function)
Displays a message on the client computers.
<HFSQL connection>.CheckIndexAsynchronous (Function)
Checks that the data contained in the index file (.NDX file) correctly references the data contained in the HFSQL Client/Server data file (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HCheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
<HFSQL connection>.ReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server data file (".NDX" file). This operation is asynchronous, i.e., it is performed on the server and does not block the client side.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Remote HFSQL Administrator: Overview
The remote HFSQL administrator is a WEBDEV site installed with the WEBDEV application server and used to remotely manage the HFSQL Client/Server databases installed on the Web server...
HCheckIndexAsynchronous (Function)
Checks that the data contained in the index file (.NDX file) correctly references the data contained in the HFSQL Client/Server data file (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HSendMessageToClient (Function)
Displays a message on the client computers.
<HFSQL connection>.StatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
HReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server data file (".NDX" file). This operation is asynchronous, i.e., it is performed on the server and does not block the client side.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Managing the load balancing (dynamic load balancing on server)
The server that is hosting a HFSQL database engine can be very busy...
<Source>.CheckUnaltered (Function)
Checks that one or all records in an unalterable data file have not been modified (e.g. with a hexadecimal editor).
<Connection variable>.ManageServerUpdate (Function)
Used to manage the automatic update of HFSQL Client/Server servers by specifying the check frequency regarding the availability of updates.
HFSQL Cluster functions
The following functions are used to manage an HFSQL cluster
HStatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
<HFSQL connection>.CheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server data file.
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Notifications of an HFSQL server
A server may encounter problems without any user (or developer) noticing anything.
For example:
  • a scheduled task may fail,
  • an automatic backup may fail,
  • a node may become inactive in an HFSQL cluster, ...
<Connection variable>.RestoreBackup (Function)
Used to restore: an immediate backup (performed by HBackup or via the HFSQL Control Center), a scheduled backup (described by HAddScheduledBackup or via the HFSQL Control Center....
<Connection variable>.DeleteGroup (Function)
Deletes (from the server) a group of users associated with a connection.
<Connection variable>.DeleteUser (Function)
Deletes a user associated with a connection to the HFSQL server.
<Connection variable>.CancelBackup (Function)
Cancels a current backup.
HDeleteSchedulingHistory (Function)
Deletes the executions of a scheduled job on an HFSQL server. This job can be a scheduled task (stored procedure), backup, optimization or a materialized view refresh.
Transactions in SQL
Starting with version 21, you can manage transactions in SQL code......
HListServer (Function)
Lists the HFSQL servers installed on a computer.
HDeleteGroup (Function)
Deletes (from the server) a group of users associated with a connection.
HDeleteUser (Function)
Deletes a user associated with a connection to the HFSQL server.
HCancelBackup (Function)
Cancels a current backup.
HServerMaintenance (Function)
Checks and optimizes the system tables of an HFSQL server.
<Connection variable>.AddTask (Function)
Adds a scheduled task on the server defined by the connection.
<Connection variable>.ModifyScheduledBackup (Function)
Modifies a backup scheduling.
<Connection variable>.DeleteBackup (Function)
Deletes a backup previously created with HBackup.
HAddTask (Function)
Adds a scheduled task on the server defined by the connection.
HModifyScheduledBackup (Function)
Modifies a backup scheduling.
HDeleteBackup (Function)
Deletes a backup previously created with HBackup.
Debugging a connection to an HFSQL server
The stored procedures and the triggers are debugged from the environment, with real execution on the server......
<Connection variable>.Backup (Function)
Makes a backup copy of the content of an HFSQL server: all databases on the server, one or more databases, one or more data files.
HInfoLog (Function)
Returns information about the server logs.
HSuggestKeyStart (Function)
Starts collecting information on executed queries.
HSuggestKeyEnd (Function)
Finishes collecting information on executed queries.
<Source>.Track (Function)
Starts tracking write actions (addition, modification or deletion) performed on a file found in an HFSQL server.
<Source>.TrackStop (Function)
Stops tracking a data file on an HFSQL server.
<Connection variable>.StopServer (Function)
Stops an HFSQL server.