Try:

Do $System.Process.Terminate(,exitCode)

See documentation for reference. On older versions I believe the equivalent is:

Do $zu(4,$job,exitCode)

But this shouldn't be used if the nicer method is available.

1/2. I use the "My Content" page to quickly get back to my own posts. I don't use "My Collaborations" or understand how the content that appears there is determined.

3. I'd expect to see my own posts (and perhaps answers) on "My Content" and for "My Collaborations" to show links to questions that I have answered and to posts/answers that I have commented on. Answers could fit in either category (or both); I'm not sure if those are best understood as content or as a particular type of comment.

4. Show the content described in (3) on these pages. Also, for answers, rather than showing "answer406256" as the title (for example), show "Answer: <title of question>" and link to the answer within the question page rather than the answer on its own. I think the same would also apply to comments shown on "My Collaborations" (if that approach is taken). If "My Collaborations" shows comments it might make sense to group them by post, in case there's a very active back-and-forth.

This should accomplish what you want:

var tablePane = zen('yourTablePaneId');

// Don't actually execute the query the next time the table is rendered.
tablePane.setProperty('initialExecute',false);

// Clear the snapshot (cached results of the query, used for quick pagination) before re-rendering.
// This is irrelevant if the tablePane isn't using snapshots.
tablePane.setProperty('clearSnapshot',true);

// Regenerate HTML for the tablePane - it'll be empty.
tablePane.refreshContents();

Or, a bit more simply:

var tablePane = zen('yourTablePaneId');

// Don't actually execute the query the next time the table is rendered.
tablePane.setProperty('initialExecute',false);

// Re-execute the query (this also clears the snapshot if snapshots are in use)
tablePane.executeQuery();

If refreshContents() / executeQuery() is called again, query results will be shown, because initialExecute is set to true each time the tablePane is drawn.

Specifics on %CSP.Page / cspbind error handling:

There are alternatives to modifying system-level error message translations. Even if the localization is changed, the end user would probably still see "SQLCODE -139," which isn't helpful. What you probably want to show the user is "Someone else has modified this record. Please reload the page and try again." or something similar.

Using %CSP.Page and a form with cspbind, there's no way to customize the error handling in the generated <form name>_save function. It seems to always show any error message in an alert. An alternative would be to use a similar approach to form.csp and formsubmit.csp in the SAMPLES namespace, submitting the form and calling the <form name>Submit method of the page rather than using a hyperevent (in form_save()). Note that you don't need a separate page to handle the form submit; one page can do it all.

Of course, if the form is saved with a POST rather than a hyperevent, and optimistic concurrency control is in use, it might be worth a separate call to the server immediately before submitting the form for an optimistic concurrency check. If someone else edited the record, the page could tell the user rather than submitting the form. This wouldn't prevent the error in question, but would at least make it much less likely.

(Side note: %CSP.Page/cspbind is very old technology. There are better tools available now, but if you're stuck with it in a large existing project, that's understandable.)

General thoughts on showing users friendly error messages:

The more general problem is: "Often, the error codes and messages the system produces are not helpful to an end user. How do you show the user the information they need when an error occurs?"

This gets more complicated because error messages can come from very different sources - for example, SQL, an object %Save, a variable being undefined, or the application detecting a user error.

The standard for the large Caché-based application I work on is:

• Within UI classes (class-based CSP or Zen, in our case), server-side code is wrapped in try-catch blocks.
• Different types of exceptions (subclasses of %Exception.AbstractException) are thrown for the different types of errors that occur. These may be:
  • SQLCODEs and associated messages from embedded or dynamic SQL
  • Error %Status codes from object %Saves and various other things
  • General internal errors in application business logic
  • User errors detected in business logic. (These are treated differently for logging purposes; user errors may be more common than system errors and might not be logged.)
  • System errors (<UNDEFINED>, <SUBSCRIPT>, etc.)
• Any of these types of exceptions. except system errors, may include a user-friendly message explaining what went wrong.
• If an exception is caught, a method is called to (1) log that an error occurred and (2) either provide a description of the error that the user can understand, or else just say that an error happened (with the confusing details omitted, although they are logged).
  • If the exception already has a friendly message for the user, it's returned.
  • Otherwise, for error SQLCODEs and error %Status codes, we provide general messages for concurrency-related errors and some other common error codes. We also have a system for interpreting foreign and unique key violations (from an SQLCODE or %Status) and providing more descriptive messages based on those.
  • Worst case, the message "An internal error occurred (log ID _____)" is returned.
• The message is shown to the user in red text, an alert dialog (ideally not a vanilla JavaScript alert), or however else makes sense in context.
• There are macros for the different types of exceptions and for getting the user-friendly message, for ease of maintainability.

This has been bothering me a little bit; %Dictionary.* should really be a last-resort option, in my opinion, and it isn't easy to use it to get the full picture from an SQL perspective.

Here are some alternative/possibly-better solutions, using %SQL.StatementMetadata and INFORMATION_SCHEMA. It looks like INFORMATION_SCHEMA is more exactly what you were looking for, if you're running on a recent enough Caché version (2015.1+). I haven't been able to find documentation on it other than the class reference, though.

/// NOTE: It could be good to validate pTableName to avoid SQL injection. (Outside the scope of this demo.)
/// This works pre-2015.1 (since %SQL.Statement was introduced - maybe 2012.2+?)
ClassMethod GetTableColumns(pTableName As %String) As %List
{
    #dim tResult As %SQL.StatementResult
    #dim tMetadata As %SQL.StatementMetadata
    Set tStmt = ##class(%SQL.Statement).%New()
    $$$ThrowOnError(tStmt.%Prepare("select top 0 * from "_pTableName))
    Set tResult = tStmt.%Execute(), tMetadata = tResult.%GetMetadata()
    Set tCols = ""
    For i=1:1:tMetadata.columnCount {
        Set tCols = tCols_$ListBuild(tMetadata.columns.GetAt(i).colName)
    }
    Quit tCols
}
/// This will only work on 2015.1+; INFORMATION_SCHEMA is a new feature. For more information, see the class reference for it in the documentation.
ClassMethod GetTableColumnsNew(pTableName As %String) As %List
{
    #dim tResult As %SQL.StatementResult
    Set tStmt = ##class(%SQL.Statement).%New()
    Set tSchema = $Piece(pTableName,".")
    Set tTableName = $Piece(pTableName,".",2)
    $$$ThrowOnError(tStmt.%Prepare("select COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS where TABLE_SCHEMA = ? and TABLE_NAME = ?"))
    Set tResult = tStmt.%Execute(tSchema,tTableName)
    Set tCols = ""
    While tResult.%Next(.tSC) {
        Set tCols = tCols_$ListBuild(tResult.%Get("COLUMN_NAME"))
    }
    $$$ThrowOnError(tSC)
    Quit tCols
}

Using this:

SAMPLES>set cols = ##class(Demo.TableColumns).GetTableColumns("Sample.Person")
SAMPLES>w $lts(cols)
ID,Age,DOB,FavoriteColors,Name,SSN,Spouse,Home_City,Home_State,Home_Street,Home_Zip,Office_City,Office_State,Office_Street,Office_Zip
SAMPLES>set cols = ##class(Demo.TableColumns).GetTableColumnsNew("Sample.Person")
SAMPLES>w $lts(cols)                                                            ID,Age,DOB,FavoriteColors,Name,SSN,Spouse,Home_City,Home_State,Home_Street,Home_Zip,Office_City,Office_State,Office_Street,Office_Zip

Look at $zconvert (abbreviated $zcvt):

http://docs.intersystems.com/cache20152/csp/docbook/DocBook.UI.Page.cls?KEY=RCOS_fzconvert

For example:

USER>w $zcvt("thisIsATest","U")

THISISATEST

USER>w $zcvt("thisIsATest","L")

thisisatest

"GOTO label" jumps to a specified label in the same context frame.

"DO label" adds a new context frame. Code at the specified label will execute until a QUIT/RETURN or the end of the routine, then execution will resume at the next line after the DO command.

So in this case it's running through the whole routine (including everything under the dataentry label, with dtype already set to something valid), including printing the message at the end. Then it proceeds to the next thing after the DO command, which is printing that line again.

For what it's worth, if you're building command-line tools, %Library.Prompt may save you a lot of time. See the class reference for more informatioan.

For example:

#include %syPrompt
    New options,dtype
    Write "Deployment Utility"
    Set options(1) = "Gateway"
    Set options(2) = "IHE"
    Do ##class(%Prompt).GetArray("Deployment Type?",.dtype,.options,,,,$$$InitialDisplayMask+$$$MatchArrayMask)
    Write !, "Starting ", dtype," deployment..."
    Quit