Added support for visualizing the graphs using Stacked Line, Bar, and Stacked Bar charts in the query tool. Fixes #7486

docs/en_US/query_tool.rst

@@ -360,8 +360,7 @@ from the drop-down menu to select all the columns.
 
 * Graph Type
 
-Choose the type of the graph that you would like to generate. Currently only
-*Line Charts* option is there, but more charts will be added soon.
+Choose the type of the graph that you would like to generate.
 
 .. image:: images/query_graph_type.png
     :alt: Query tool graph visualiser graph type
@@ -382,7 +381,8 @@ Click the *Download* button on the button bar to download the chart.
 Line Chart
 ==========
 
-The *Line Chart* can be generated by selecting the X-axis and the Y-axis and
+The *Line Chart* can be generated by selecting the 'Line Chart'
+from the Graph Type drop-down, selecting the X-axis and the Y-axis, and
 clicking on the 'Generate' button. Below is an example of a chart of employee
 names and their salaries.
 
@@ -393,6 +393,40 @@ names and their salaries.
 Set *Use different data point styles?* option to true in the :ref:`preferences`,
 to show data points in a different style on each graph lines.
 
+Stacked Line Chart
+==================
+
+The *Stacked Line Chart* can be generated by selecting the 'Stacked Line Chart'
+from the Graph Type drop-down, selecting the X-axis and the Y-axis, and
+clicking on the 'Generate' button.
+
+.. image:: images/query_stacked_line_chart.png
+    :alt: Query tool graph visualiser stacked line chart
+    :align: center
+
+Bar Chart
+==========
+
+The *Bar Chart* can be generated by selecting the 'Bar Chart'
+from the Graph Type drop-down, selecting the X-axis and the Y-axis, and
+clicking on the 'Generate' button.
+
+.. image:: images/query_bar_chart.png
+    :alt: Query tool graph visualiser bar chart
+    :align: center
+
+Stacked Bar Chart
+=================
+
+The *Stacked Bar Chart* can be generated by selecting the 'Stacked Bar Chart'
+from the Graph Type drop-down, selecting the X-axis and the Y-axis, and
+clicking on the 'Generate' button.
+
+
+.. image:: images/query_stacked_bar_chart.png
+    :alt: Query tool graph visualiser stacked bar chart
+    :align: center
+
 Connection Status
 *****************
 

docs/en_US/release_notes_6_12.rst

@@ -9,6 +9,7 @@ This release contains a number of bug fixes and new features since the release o
 New features
 ************
 
+  | `Issue #7486 <https://redmine.postgresql.org/issues/7486>`_ -  Added support for visualizing the graphs using Stacked Line, Bar, and Stacked Bar charts in the query tool.
 
 Housekeeping
 ************