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bug#6686: 24.0.50; [restore functionality] sql-mode

From: Tim Cross
Subject: bug#6686: 24.0.50; [restore functionality] sql-mode
Date: Thu, 29 Jul 2010 09:51:53 +1000 (EST)

 Michael Mauger <address@hidden> wrote ...
>----- Original Message ----
>> From: Chong Yidong <address@hidden>
>> To: Michael R. Mauger <address@hidden>
>> Cc: Tim Cross <address@hidden>; address@hidden
>> Sent: Fri, July 23, 2010 12:19:14 PM
>> Subject: Re: bug#6686: 24.0.50; [restore functionality] sql-mode
>> Hi Michael,
>> Could you take a look at this bug report?   Thanks.
>> Tim Cross <address@hidden> writes:
>> >  The way sql-mode works in emacs has changed and while some of the
>> >  changes are good, there is one major change that isn't.
>> >
>> > In  previous versions of sql-mode, running queries and executing stored
>> >  procedures/functions from within the sql interactive buffer did not hold
>> >  system focus. If the command you executed was going to take some time to
>> >  run, you could switch to another buffer/frame and continue working, read
>> >  mail, use w3m etc. However, this has now changed. When you execute an
>> >  SQL command or call a stored procedure/function from within the SQLi
>> >  buffer, you are effectively locked out from doing anything else in emacs
>> >  until that command has completed. I'm guessing, but suspect this change
>> >  is due to the additional output processing that has been added to
>> >  sql-mode, such as translation of tabs to spaces etc. I have disabled as
>> >  many features as I can, but this has made no difference.
>> >
>> > I am  using sql-mode to access an Oracle database using sqlplus.
>> > Everything  works as it always has with emacs 23 and this change only
>> > occured in  emacs 24 either late last year or early this year.
>> >
>> > Could we  either have the old behavior restored or if that is not
>> > possible and if  the change is due to other new features, have a way of
>> > turning the new  features off and restoring the old behavior. I really
>> > want to continue  using sql-mode and *really* don't want to have to give
>> > it up in favor of  something far less pleasant to use than emacs!
>> >
>> >  thanks,
>> >
>> > Tim
>> >
>> >
>> > In GNU Emacs  (i686-pc-linux-gnu, GTK+ Version 2.20.1)
>> >  of 2010-07-19 on  blind-mole
>> > Windowing system distributor `The X.Org Foundation', version  11.0.10706000
>> > configured using `configure   '--prefix=/usr/local''
>The only change that I believe impacted the handling of the command 
>in SQLi mode 
>is the use of `comint-input-sender' which may modify the text sent to the 
>command interpreter
>before sending it.  (For example, replacing TAB characters or handling 
>&placeholders).  This 
>should not cause the blocking behavior you describe.
>I have seen that behavior with code found on the net that strips out 
>continuation prompts on 
>SQL*Plus.  Is that a possible culprit?  
>To be sure that the input filtering is not the cause you can:
>  (sql-set-product-feature 'oracle :input-filter nil)
>The other thing you can try is to interrupt emacs under the debugger when its 
>blocking and
>look at the backtrace.  
>Beyond that, more details of your setup of SQL mode might be helpful.  I'm not 
>seeing the same 
>behavior but I don't have sqlplus available to me now.

OK, I will try the suggestion of setting input fileter to nil and see if that
makes a difference. 

Note that I do not observe this behavior with emacs 23 and its version of
sql-mode. This is on the same system, using the same configuration and the
same version of sqlplus. Also note that I do not have any additional code or
customizations, other than those provided by sql-mode. My sql-mode custom
settings are 

 '(sql-input-ring-file-name "~/.sql-input")
 '(sql-oracle-scan-on nil)
 '(sql-product (quote oracle))

I will let you know what I find.



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