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Version: 2026

HFSQL Client/Server functions
Several HFSQL functions are used to manage the HFSQL Client/Server data...
Stored procedures and queries (HFSQL Client/Server)
The stored procedures are used to simplify the development and the maintenance of your applications by factorizing the code...
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...
How to backup HFSQL Client/Server databases?
The backup of the HFSQL Client/Server databases can be performed ...
HFSQL Client/Server: Scheduled tasks
The scheduled tasks are used to schedule automatic tasks...
Restoring an HFSQL Client/Server database
A backup of an HFSQL Client/Server database can be restored at any time...
HFSQL Client/Server: Port management
The ports used by the HFSQL Client/Server server...
Managing rights on HFSQL Client/Server
To ensure data security and confidentiality, some actions may be restricted to a group of users...
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: Backing up databases
Like for any database, backups of your HFSQL Client/Server databases must be performed on a regular basis...
HFSQL Client/Server functions (prefix syntax)
Several HFSQL functions are used to manage the HFSQL Client/Server data...
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>.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.
Overview of HFSQL Cluster
HFSQL Cluster is a database server intended to be deployed on several servers...
<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>.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, ...
HFSQL Cluster functions
The following functions are used to manage an HFSQL cluster
Limitations of WINDEV, WEBDEV and WINDEV Mobile
A structure is a custom type of data...
<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.
Managing the load balancing (dynamic load balancing on server)
The server that is hosting a HFSQL database engine can be very busy...
Using the Control Centers in Client/Server mode
All the Control Centers provided with WINDEV, WEBDEV and WINDEV Mobile use the same database...
Debugging a connection to an HFSQL server
The stored procedures and the triggers are debugged from the environment, with real execution on the server...
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.
Authentication via Active Directory
Kerberos is an authentication mode based on the use of tickets and secret keys...
Installing and configuring HFSQL Cluster
Required configuration and overview for installing HFSQL Cluster.
HAddScheduledOptimization (Function)
Adds an optimization task of HFSQL Client/Server tables.
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.
<Connection variable>.AddScheduledOptimization (Function)
Adds an optimization task of HFSQL Client/Server tables.
The Looper control: Custom synchronization
How to manage the synchronization between: the page displayed in the browser. This page contains a Looper control that displays the records found in an HFSQL file. the corresponding page context found on the server....
Result of a query in test mode
After its execution in test mode (see Running the query test), the result of the query can be......
SourceToScreen (Function)
Automatically updates the controls in a window or page with: the values of the bound items in the current record (loaded in memory) of the HFSL data file described in the data model editor. the values of the bound WLanguage variables....
7. Multilingual sites in practice
Filtering a table, a view or a query
A filter is used to define through programming a selection of records corresponding to one or more criteria......
Managing spatial data in HFSQL databases
Starting with version 2024, you can store and manipulate geometric and geographic data in HFSQL databases......
7. Multilingual applications in practice
Native MySQL Connector: Specific features and remarks
Remarks and specific features of the Native MySQL Connector...
Native xBase/FoxPro Connector
WINDEV and WEBDEV propose a Native xBase/FoxPro Connector (or Native xBase/FoxPro Access) module......
WDLog: Overview
The different operations that can be performed with WDLog are as follows......
Handling Scheduler controls programmatically
A Scheduler control can be......
New Features brochure - Version 27: New WINDEV features
New features in WINDEV 27 presented in the New Features brochure....
WDConver : Overview
WDConver is a tool used to convert data to an HFSQL Classic data file from......
PageFromSource (Function)
Automatically updates the controls of a page with: the values of the bound items in the current record (loaded in memory) of the HFSL table described in the data model editor. the values of the bound WLanguage variables. This operation is performed regardless of the state of the controls (grayed, inactive or invisible)....
<Source>.ToPage (Function)
Automatically updates the controls of a page with: the values of the bound items in the current record (loaded in memory) of the HFSL table described in the data model editor. the values of the bound WLanguage variables. This operation is performed regardless of the state of the controls (grayed, inactive or invisible)....
CtCacheSize (Property)
The CtCacheSize property is used to determine and change the maximum number of records that can be stored in the cache of the Native MySQL Connector.