You can run forward and reverse lineage analysis to trace metadata at the column level. Forward lineage analysis generates a lineage with the column as source. And, reverse lineage analysis generates a lineage with the column as target. The Dual-Combined View lineage analysis generates a lineage, which includes both forward and reverse lineage.
This topic walks you through the following:
Viewing Lineage
To run lineage at the column level, follow these steps:
- Go to Application Menu > Data Catalog > Mapping Manager.
- In the Workspace Mappings pane, click the required mapping.
- Select a row.
- Right-click a column and hover over Lineage Analyzer.
- Hover over any one of the following:
- Forward: Use this option to view forward lineage.
- Reverse: Use this option to view reverse lineage.
- Dual - Combined View: Use this option to view forward and reverse lineage of the column combined together.
- Use the following options:
- All Projects
- Use this option to include all the projects in lineage analysis.
- By Project
- Use this option to select projects for lineage analysis.
- By default, all the projects are selected. Clear the check boxes for the projects that are not required. Then, click
.- The column's reverse lineage is generated based on the options you selected. Similarly, you can generate forward, and dual lineage for columns. By default, the lineage appears in Graphical View.
- You can click Graphical View or Grid View to switch between them:
Graphical View: The graphical view displays the lineage of the column in a graphical format. Selecting a column on the graphical view displays its properties in the Node Properties pane and Legends.
On the Node Properties pane, click
to view the selected object's properties in a new window. For more information on updating column properties, refer to the Updating Column Properties topic.
Grid View: The grid view displays the lineage of the environment system in a tabular format. You can view the source and target system associated with the selected system.
- Use the following options to work on the lineage in graphical view:
- Options (
)- Use this option to view lineage types, business properties and customizations options. For more information on lineage options, refer to the Working on Lineage section.
- Export to Image (
)- Use this option to download the lineage view as an image, in the .jpg format. Ensure that you expand the required nodes in a linage before downloading the lineage image.
- Export to PDF (
)- Use this option to download the lineage report in the .pdf format. Ensure that you expand the required nodes in a linage before downloading the lineage report as PDF.
- Export to Excel (
)- Use this option to download the lineage report in the .xlsx format. Ensure that you expand the required nodes in a linage before downloading the report.
- Options (
The Mapping Specification grid appears.
The options available for Linear Analyzer appear.
For example, when you hover over the Reverse, All Projects and By Project appear as options.
On the lineage, expand a table node, and select a column to view its lineage path. The column is highlighted in blue color, its forward lineage path appears in red, and its reverse lineage path appears in blue. Assets that are not part of a lineage path disappear.
Right-click a path around the selected object to highlight its path of the source or target in the lineage.
Transformations between columns are indicated using 
in the lineage. Hover over to view transformation rules for the columns on a pop-up. Or, click the path between the columns to highlight it to view detailed transformations between them in the Transformation Details pane.
You can expand the transformation node to view the transformation details that includes Business Rule, Extended Business Rule, Trans lookup Condition, Lookup On, and more relevant properties.
Working on Lineage
Lineage of a column shows how metadata moves through columns. It provides a summary of columns used as source and target. Also, it gives information about technical and business properties of columns involved in the lineage.
Use the following options to work on lineage:
Use this option to view forward lineage of the column.
Use this option to view reverse lineage of the column.
Use this option to view dual lineage, which includes both forward and reverse lineage of the column.
Use this option to view sensitivity of the columns in the lineage. You can expand the environment node to view sensitive columns. The sensitive assets are indicated using 
.
Use this option to view expanded logical names of the tables and columns in an environment in the lineage. You can expand a system node to view environments and tables.
For example, the following image displays the table's logical name in the lineage.
Use this option to view expanded logical names of the tables and columns in an environment in the lineage. You can expand a system node to view environments, tables, and columns. or more information on configuring extended properties of columns, refer to the Column topic.
For example, the following image displays the table's expanded logical name in the lineage.
Use this option to view the data quality score of the environments, tables, and columns in the lineage. You can expand a system node to view data quality scores for environments, tables, and columns.
For example, the following image displays the data quality score in the lineage.
Use this option to rearrange the layout of the lineage automatically.
For example, the following image displays the rearranged object layout with respect to the previous screenshot.
Use this option to view the lineage excluding systems and environments that do not exist in the Metadata Manager. When this option is switched off, the views include systems and environments, that do not exist in the Metadata Manager.
For example, the following image displays lineage excluding assets that do not exist in Metadata Manager.
Use this option to remove the lineage overview pane from the graphical view.
|
Copyright © 2022 Quest Software Inc. |