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  • Overview
  • Creating an LDM
  • Optimizing the analysis
WINDEV
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadApple WatchUniversal Windows 10 AppWindows Mobile
Others
Stored procedures
Overview
A Logical Data Model (LDM) allows you to describe the data structures (data files, items, ...) used in a WINDEV, WEBDEV or WINDEV Mobile application.
Remarks:
  • The "LDM" and "Analysis" terms are indifferently used to define the structure of the database associated with a project.
  • See Handling an LDM for more details.
Remark: From version 19, HFSQL is the new name of HyperFileSQL.
Creating an LDM
To create an LDM:
  1. Click among the quick access buttons.
    • The element creation window appears: click "Data" then "Analysis".
    • The analysis creation wizard starts.
  2. In the wizard, specify:
    • the analysis name and directory. The analysis corresponds to a ".WDA" file. By default, this file will be created in the directory of project analysis (<Project name>.ANA directory). This directory must be accessible in read/write.
    • whether the analysis must be associated with the current project instead of the current analysis (when creating an analysis in a project already associated with an analysis).
    • the analysis description that briefly describes the subject of the analysis. The types of databases handled by the project: HFSQL Classic, Oracle, HFSQL Client/Server, ...
      • If the analysis must handle an external database, the corresponding native access must be installed on the computer.
      • The wizard is used to define the connection to the external database (name, caption) and to type the advanced parameters (server, user and password). This information can be specified later in the data model editor.
  3. Validate. The created analysis becomes the current analysis.
  4. Create all the elements (data files, items and links) of your analysis.
    Remark: For more details, see Data files of analysis, Items of a data file and Analysis links.
  5. To use the analysis in your project, generate the analysis: on the "Analysis" pane, in the "Analysis" group, expand "Generation" and select "Generation". See Generating an analysis for more details.
Versions 20 and later

Optimizing the analysis

From version 20, the format for storing the analysis is optimized. Any new analysis created with version 20 (or later) uses this new format.
You have the ability to save the existing analyses with this new format. Caution: An analysis that uses this new format will not be compatible with versions earlier than version 19.
To use the new format on your existing analyses:
  1. Open the description window of the analysis ("Analysis description" from the popup menu of the analysis chart).
  2. In the "Details" tab, click "Save the analysis in a more compact format".
New in version 20

Optimizing the analysis

From version 20, the format for storing the analysis is optimized. Any new analysis created with version 20 (or later) uses this new format.
You have the ability to save the existing analyses with this new format. Caution: An analysis that uses this new format will not be compatible with versions earlier than version 19.
To use the new format on your existing analyses:
  1. Open the description window of the analysis ("Analysis description" from the popup menu of the analysis chart).
  2. In the "Details" tab, click "Save the analysis in a more compact format".

Optimizing the analysis

From version 20, the format for storing the analysis is optimized. Any new analysis created with version 20 (or later) uses this new format.
You have the ability to save the existing analyses with this new format. Caution: An analysis that uses this new format will not be compatible with versions earlier than version 19.
To use the new format on your existing analyses:
  1. Open the description window of the analysis ("Analysis description" from the popup menu of the analysis chart).
  2. In the "Details" tab, click "Save the analysis in a more compact format".
Minimum version required
  • Version 9
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