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Version: 2026

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
An application that uses the User Groupware can be used with an HFSQL database in Client/Server mode...
User Groupware and Client/Server data files
Applications using the User Groupware are compatible with HFSQL databases in Client/Server mode...
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...
How to backup HFSQL Client/Server databases?
The backup of the HFSQL Client/Server databases can be performed ...
HFSQL Client/Server database best practices
This help page presents the best practices for optimizing the security and performance of an HFSQL Client/Server database according to the constraints and desired features...
HFSQL Client/Server functions (prefix syntax)
Several HFSQL functions are used to manage the HFSQL Client/Server data...
<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, ...
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.
<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.
You can also reindex:
  • full-text indexes (".FTX" files),
  • spatial indexes (".SDX" files).
  • semantic indexes (".VEX" files).
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.
HSendMessageToClient (Function)
Displays a message on client computers.
HRecalculateEmbedding (Function)
Recalculates embeddings in a semantic index.
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.
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.
You can also reindex:
  • full-text indexes (".FTX" files),
  • spatial indexes (".SDX" files).
  • semantic indexes (".VEX" files).
<Connection variable>.SendMessageToClient (Function)
Displays a message on the client computers.
HFSQL Cluster functions
The following functions are used to manage an HFSQL cluster
Unalterable data files
This feature is used to signal that a data file cannot be modified after writing...
<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.
WDLog: Backup of HFSQL data files
WDLog allows you to save all the HFSQL data files used by a WINDEV or WEBDEV application...
<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.
Managing the load balancing (dynamic load balancing on server)
The server that is hosting a HFSQL database engine can be very busy...