ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Version: 2026

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 tables
Applications using the User Groupware are compatible with HFSQL databases 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...
Using the Control Centers in Client/Server mode
All the Control Centers provided with WINDEV, WEBDEV and WINDEV Mobile use the same database...
HFSQL Client/Server functions (prefix syntax)
Several HFSQL functions are used to manage the HFSQL Client/Server data...
Installing an HFSQL Client/Server server with an application
When creating the setup program of a WINDEV application using HFSQL Client/Server tables, the wizard allows you to...
HFSQL Client/Server functions
Several HFSQL functions are used to manage the HFSQL Client/Server data...
HFSQL Client/Server: Overview
You have the ability to create applications that access the HFSQL Client/Server databases...
User Groupware and Client/Server tables
An application that uses the User Groupware can be used with an HFSQL database in Client/Server mode...
HFSQL Client/Server: Backing up databases
Like for any database, backups of your HFSQL Client/Server databases must be performed on a regular basis...
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>.ManageServerUpdate (Function)
Used to manage the automatic update of HFSQL Client/Server servers by specifying the check frequency regarding the availability of updates.
<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 table (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Unalterable tables
This feature is used to signal that a table cannot be modified after writing...
<HFSQL connection>.ReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server table (".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.
<HFSQL connection>.StatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server table.
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 table have not been modified (e.g. with a hexadecimal editor).
HCheckUnaltered (Function)
Checks that one or all records in an unalterable table have not been modified (e.g. with a hexadecimal editor).
HFSQL Cluster functions
The following functions are used to manage an HFSQL cluster
<Connection variable>.SendMessageToClient (Function)
Displays a message on the client computers.
WDLog: Backup of HFSQL tables
WDLog allows you to save all the HFSQL tables used by a WINDEV or WEBDEV application...
HCheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server table.
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.
HReindexAsynchronous (Function)
Rebuilds the index of an HFSQL Client/Server table (".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.
<HFSQL connection>.CheckMemoAsynchronous (Function)
Checks the structural integrity of memos in an HFSQL Client/Server table.
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, ...
HStatCalculateAsynchronous (Function)
Gets various statistics on the keys of an HFSQL Client/Server table.
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 table (.FIC file).
This function is only available in subscription-based versions, starting with WINDEV Suite 2025 - Update 2.
Encryption (Property)
The Encryption property allows you to manage the type of encryption used between Client computers and an HFSQL server.
NbDescribedThumbnail (Property)
The NbDescribedThumbnail property is used to get the number of thumbnails expected for an item.
HCheckIndex (Function)
Checks whether the data found in the index file (.NDX file) properly refers the data found in the data file (.FIC file).
HPrepareQuery (Function)
Initializes a query and declares this query to the database server in order to optimize the next executions of this query.
Transactions: Secure your processing of HFSQL tables
This chapter presents the following topics......
Frequently asked questions about HFSQL Cluster
Frequently asked questions about HFSQL cluster....
InfoThumbnailGeneration (Property)
The InfoThumbnailGeneration property is used to determine if the thumbnails of an item have been generated successfully.
NbThumbnail (Property)
The NbThumbnail property is used to get the number of thumbnails generated for an item.
User Groupware files
Two categories of data files are managed......
WEBDEV site deployment: automatic modification of tables
The automatic modification of the tables allows updating the description of tables on the Web server......
MaxThumbnailHeight (Property)
The MaxThumbnailHeight property gets and sets the maximum height of a thumbnail of an Image item (binary memo).
MaxThumbnailWidth (Property)
The MaxThumbnailWidth property is used to get or change the maximum width of a thumbnail of an Image item (binary memo).
HStatCalculate (Function)
Performs various statistical calculations on the file keys.
HRegenerateFile (Function)
Regenerates a data file from its log.
HImportHF55 (Function)
Imports a Hyper File 5.5 file into an HFSQL Classic file.