Overview of Diagram pane

Use this pane to see descriptive information about a diagram and to change what the Canvas displays.
The Overview of Diagram pane contains two sections: Basic Information and Diagram Overview.
Figure 1. Overview of Diagram pane
Overview of Diagram pane
Basic Information
Displays the type of data server that the query is written to run on, the version of that data server, and the timestamp of the explain data that the diagram is based on.
Diagram Overview
Specifies the portion of the diagram that you want to view in the Canvas.

The Diagram Overview section contains buttons for the following actions.

Table 1. The buttons in the Diagram Overview section
Action Button
Select query block The appearance of this button depends upon whether you select the Diagram Overview button Diagram overview or the Query Block Overview button Query Block Overview.
  • When you select the Diagram Overview button Diagram overview, you can view different query blocks by clicking the arrow next to the Zoom In button. In this case, the label of the button represents the entire diagram or the selected query block. The button lists all of the query blocks that are in the diagram.
    Figure 2. Selecting a query block
    Selecting a query block

    Only that query block appears in the Diagram Overview. section
    Figure 3. The selected query block
    The selected query block
  • When you select the Query Block Overview button Query Block Overview, you can see only the Query Block (QB) nodes that are in the diagram. In this case, the button is labeled "QB overview," where "QB" means "query block."
    Figure 4. Two nodes that represent both of the query blocks in a diagram
    Query block overview
    When you double-click a query block node, it appears in the Canvas. You can also right-click the query block node and select View Query Block Diagram.

    To see where a query block is located within the entire diagram, right-click the query block node and select View Query Block Node.

Zoom in
Zoom in
Zoom out
Zoom out
Scale diagram to fit the Canvas
Scale to fit
Flip the diagram horizontally
Flip horizontally
Flip the diagram vertically
Flip vertically
Print the entire diagram or only a portion that you selected
Print diagram
Select the Diagram Overview button Diagram overview to perform these actions:
  • Click and drag the shaded rectangle to move it over other portions of the diagram. The Canvas displays the portion that the rectangle covers.

    For example, the content of the Canvas might currently look like this:

    Figure 5. Portion of a diagram in the Canvas
    Portion of a diagram in the Canvas

    You can drag the rectangle to the other side of the diagram.

    Figure 6. Dragging the shaded rectangle
    Dragging the shaded rectangle

    After you do so, the content of the Canvas looks like this.

    Figure 7. Different portion of the same diagram
    Different portion of the same diagram

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