Query tool doc update

docs/en_US/query_tool.rst

@@ -4,7 +4,7 @@
 The Query tool  
 **************
 
-The Query tool is a powerful, feature-rich environment that allows you to execute arbitrary SQL commands and review the result set.  If you access the Query tool via the *Query Tool* menu selection from the *Tools* menu, you can:
+The Query tool is a powerful, feature-rich environment that allows you to execute arbitrary SQL commands and review the result set.  If you access the Query tool via the *Query Tool* menu option on the *Tools* menu, you can:
 
 * Issue ad-hoc SQL queries. 
 * Execute arbitrary SQL commands.
@@ -12,7 +12,7 @@ The Query tool is a powerful, feature-rich environment that allows you to execut
 * Review the execution plan of a SQL statement in either a text or a graphical format.
 * View analytical information about a SQL statement.
 
-If you open the Query tool via the *View Data* context-menu selection, the Query tool acts as a data editor, allowing you to:  
+If you open the Query tool via the *View Data* context-menu, the Query tool acts as a data editor, allowing you to:  
 
 * View or modify the data that is stored in a table. 
 * Filter the result set.
@@ -22,7 +22,7 @@ If you open the Query tool via the *View Data* context-menu selection, the Query
 
 .. image:: images/query_tool.png
 
-The Query tool features a toolbar with frequently used options, and a work environment divided into two panels: 
+The Query tool features a toolbar that allows quick access to frequently used options, and a work environment divided into two panels: 
 
 * The upper panel of the Query tool contains the *SQL Editor*.  You can use the panel to manually enter a query, or review the query that generated the result set displayed in the lower panel. 
 * The lower panel of the Query tool contains the *Data Output* panel. The output panel displays the result of a query, or information about a query's execution plan.
@@ -35,22 +35,21 @@ The *Query tool* toolbar uses context-sensitive icons that provide shortcuts to
 
 .. image:: images/query_toolbar.png 
 
-Hover over an icon to display a tooltip that describes the icon's functionality.
+Hover over an icon to display a tooltip that describes the icon's functionality:
 
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | Icon                 | Behavior                                                                                          |
-+====================+===================================================================================================+
-| *Open File*        | Click the *Open File* icon to display the content of a saved data set or query in the             |
-|                    | SQL Editor.                                                                                       |
-+--------------------+---------------------------------------------------------------------------------------------------+
-| *Save*     	     | Click the *Save* icon to save the query that is currently displayed in the SQL Editor panel.      |
-+--------------------+---------------------------------------------------------------------------------------------------+
++======================+===================================================================================================+
+| *Open File*          | Click the *Open File* icon to display a previously saved query in the SQL Editor.                 |
++----------------------+---------------------------------------------------------------------------------------------------+
+| *Save*     	       | Click the *Save* icon to save the query that is currently displayed in the SQL Editor.            |
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Copy*               | Click the *Copy* icon to copy the currently selected row.                                         |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Paste*              | Click the *Paste* icon to paste the content that is currently on the clipboard.                   |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Add New Row*        | Use the *Add New Row* icon to add a new row in the output panel.                                  |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Filter*             | Click the *Filter* icon to open a dialog that allows you to write and apply a filter for the      |
 |                      | content currently displayed in the output panel.  Click the down arrow to open the *Filter* drop- |
 |                      | down menu and select from pre-defined options:                                                    |
@@ -62,13 +61,15 @@ Hover over an icon to display a tooltip that describes the icon's functionality.
 |                      |                                                                                                   |
 |                      |  Select *Exclude selection* to refresh the displayed data, excluding those rows that have columns |
 |                      |  that match the currently highlighted value.                                                      |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | *No limit*           | Use the *No limit* drop-down listbox to specify how many rows to display in the output panel.     |
-|                    |    Select from *No limit* (the default), *1000 rows*, *500 rows*, or *100 rows*.                  |
-+--------------------+---------------------------------------------------------------------------------------------------+
+|                      | Select from: *No limit* (the default), *1000 rows*, *500 rows*, or *100 rows*.                    |
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Execute/Refresh*    | Click the *Execute/Refresh* icon to either execute or refresh the query highlighted in the SQL    |
 |                      | editor panel. Click the down arrow to access other execution options:                             |
 |                      |                                                                                                   |
+|                      |     Select *Execute/Refresh* to invoke the SQL command and refresh the result set.                |
+|                      |                                                                                                   |
 |                      |     Select *Explain* to view an explanation plan for the current query.  The result of the        |
 |                      |     EXPLAIN is displayed graphically on the *Explain* tab of the output panel, and in text        |
 |                      |     form on the *Data Output* tab.                                                                |
@@ -94,33 +95,32 @@ Hover over an icon to display a tooltip that describes the icon's functionality.
 |                      |    Add a check next to *Auto-Commit* to instruct the server to automatically commit each          |
 |                      |    transaction.  Any changes made by the transaction will be visible to others, and               |
 |                      |    durable in the event of a crash.                                                               |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Stop*               | Click the *Stop* icon to cancel the execution of the currently running query.                     |
-+--------------------+---------------------------------------------------------------------------------------------------+
-| *Edit*             | Use options on the *Edit* drop-down menu to erase the contents of the query window or erase       |
-|                    | the content of the *History* tab.                                                                 |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
+| *Clear query window* | Use options on the *Clear query window* drop-down menu to erase the contents of                   |
+|                      | the SQL editor panel or the *History* tab.                                                        |
++----------------------+---------------------------------------------------------------------------------------------------+
 | *Download as CSV*    | Click the *Download as CSV* icon to download the result set of the current query to a             |
 |                      | comma-separated list.                                                                             |
-+--------------------+---------------------------------------------------------------------------------------------------+
-| *Search*           | Use the *Search* field to search the result set for specific content.                             |
-+--------------------+---------------------------------------------------------------------------------------------------+
++----------------------+---------------------------------------------------------------------------------------------------+
+
 
 **The SQL Editor Panel**
 
-The *SQL editor* panel contains a workspace for entering commands; you can read a query from a file, or type a query. It features syntax coloring and autocompletion to help you write queries.
+The *SQL editor* panel contains a workspace for entering commands; you can read a query from a file, or type a query. The SQL editor features syntax coloring and autocompletion to help you develop queries.
 
 .. image:: images/query_sql_editor.png
 
-To use autocomplete, start typing your query, and press the Control+Space shortcut to see a list of possible object names to insert. For example, type "\*SELECT \* FROM\* " (without the quotes, but with the trailing space), and then press the Control+Space key combination to select from a popup menu of autocomplete options. 
+To use autocomplete, begin typing your query; when you would like the Query editor to suggest object names or commands that might be next in your query, press the Control+Space key combination. For example, type "\*SELECT \* FROM\* " (without quotes, but with a trailing space), and then press the Control+Space key combination to select from a popup menu of autocomplete options. 
 
 .. image:: images/query_autocomplete.png
 
-After entering a query, select the *Execute/Refresh* icon from the toolbar. The complete contents of the SQL editor panel will be sent to the database server for execution. To execute a section of the code that is displayed in the SQL editor, highlight the text that you want the server to execute, and click the *Execute/Refresh* icon. 
+After entering a query, select the *Execute/Refresh* icon from the toolbar. The complete contents of the SQL editor panel will be sent to the database server for execution. To execute only a section of the code that is displayed in the SQL editor, highlight the text that you want the server to execute, and click the *Execute/Refresh* icon: 
 
 .. image:: images/query_execute_section.png
 
-The message returned by the server is displayed on the *Messages* tab of the output panel.  If the command is successful, the *Messages* tab displays execution details.
+The message returned by the server when a command executes is displayed on the *Messages* tab of the output panel.  If the command is successful, the *Messages* tab displays execution details:
 
 .. image:: images/query_tool_message.png
 
@@ -142,7 +142,7 @@ The *Data Output* panel organizes output through the following tabs: *Data Outpu
 
 .. image:: images/query_output_data.png
 
-If the Query tool is opened through the *Query tool* menu option, you can use the *Data Output* tab to view the results of an arbitrary query in a table format. If the Query tool is opened through a *View Data* menu option, you can use the *Data Output* tab to review the data stored in the selected table.
+If the Query tool is opened through the *Query tool* menu option on the *Tools* menu, you can use the *Data Output* tab to view the results of an arbitrary query in a table format. If the Query tool is opened through a *View Data* context menu, the *Data Output* tab will display the data stored in the table from which the Query tool was opened.
 
 * Click a column header to sort data by that column. Click again to reverse the sorting order.
 * If enabled, use the *Filter* options from the Query tool toolbar to refine the result set displayed on the *Data Output* tab.
@@ -150,22 +150,24 @@ If the Query tool is opened through the *Query tool* menu option, you can use th
 * If enabled, use the *Execute/Refresh* options to retrieve query execution information and set query execution options.
 * Use the *Download as CSV* icon to download the content of the *Data Output* tab as a comma-delimited file.
 
-All rowsets from previous queries or commands that are displayed in the *Data Output* panel will be discarded when you invoke another query; open another query tool from the menu bar or context-menu to keep results available.
+All rowsets from previous queries or commands that are displayed in the *Data Output* panel will be discarded when you invoke another query; open another query tool browser tab to keep your previous results available.
 
 Use the *Explain* tab to view a graphical representation of a query: 
 
 .. image:: images/query_output_explain.png
 
-To generate a graphical explain diagram, navigate to the *Explain* tab, and select *Explain*, *Explain Analyze*, or one or more options from the *Explain options* menu on the *Execute/Refresh* drop-down. Please note that *EXPLAIN VERBOSE* cannot be displayed graphically. Hover over an icon on the *Explain* tab to review information about that item; a popup window will display information about the selected object: 
+To generate a graphical explain diagram, open the *Explain* tab, and select *Explain*, *Explain Analyze*, or one or more options from the *Explain options* menu on the *Execute/Refresh* drop-down. Please note that *EXPLAIN VERBOSE* cannot be displayed graphically. Hover over an icon on the *Explain* tab to review information about that item; a popup window will display information about the selected object: 
 
 .. image:: images/query_output_explain_details.png
 
-Note that the *QUERY PLAN* that accompanies the *Explain analyze* is available in the *Data Output* tab. 
+Note that the query plan that accompanies the *Explain analyze* is available on the *Data Output* tab. 
 
-Use the *Messages* tab to view information about the last-executed query; if the server returns an error, the error message will be displayed on the *Messages* tab: 
+Use the *Messages* tab to view information about the last-executed query:
 
 .. image:: images/query_output_error.png
 
+If the server returns an error, the error message will be displayed on the *Messages* tab, and the syntax that cause the error will be underlined in the SQL editor.
+
 If a query succeeds, the *Messages* tab displays how long the query took to complete and how many rows were retrieved: 
 
 .. image:: images/query_output_messages.png
@@ -174,4 +176,12 @@ Use the *History* tab to review activity for the current session:
 
 .. image:: images/query_output_history.png
 
-To erase the content of the *History* tab, select *Clear history* from the *Edit* drop-down menu.
+The History tab displays: 
+
+* The date and time that a query was invoked.
+* The text of the query.
+* The number of rows returned by the query.
+* The amount of time it took the server to process the query and return a result set.
+* Messages returned by the server (not noted on the *Messages* tab).
+
+To erase the content of the *History* tab, select *Clear history* from the *Clear query window* drop-down menu.