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Delay in loop [message #211056]

Mon, 25 December 2006 23:19

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

i want to display numbers from 1..100 and there must be delay in displaying each number. i want to add delay in loop. help required in oracle ..form..

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Re: Delay in loop [message #211184 is a reply to message #211056]

Wed, 27 December 2006 01:33

wency
Messages: 450
Registered: April 2006
Location: Philippines

Senior Member

If you want manual delay, then insert this:

For x IN 1..1000
          Loop
             NULL;
          End Loop;

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Re: Delay in loop [message #211306 is a reply to message #211184]

Wed, 27 December 2006 21:56

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

thanks dear u replied my question. yes this is a way but it looks some what improper. but suggest some proper way to insert delay in loop.

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Re: Delay in loop [message #211322 is a reply to message #211056]

Wed, 27 December 2006 23:58

wency
Messages: 450
Registered: April 2006
Location: Philippines

Senior Member

Delay is maybe loop or timer. Try to use timer if you want, but I prefer loop for it's simplicity.

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Re: Delay in loop [message #211334 is a reply to message #211322]

Thu, 28 December 2006 00:32

Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe

Senior Member
Account Moderator

You asked this question in the Forms forum, so this doesn't necessarily have to be helpful to you, but nevertheless: DBMS_LOCK package could be used for this purpose:

SQL> begin
  2    for i in 1 .. 5
  3    loop
  4      dbms_output.put_line(to_char(sysdate, 'mi:ss'));
  5      dbms_lock.sleep(3);
  6    end loop;
  7  end;
  8  /
27:40
27:43
27:46
27:49
27:52

PL/SQL procedure successfully completed.

SQL>

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Re: Delay in loop [message #212116 is a reply to message #211334]

Wed, 03 January 2007 18:03

djmartin
Messages: 10181
Registered: March 2005
Location: Surges Bay TAS Australia

Senior Member
Account Moderator

Have you solved your problem?

Have you considered using a 'timer'? Search the reference manual and this forum for 'timer' to get more ideas.

David

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Re: Delay in loop [message #212119 is a reply to message #211184]

Wed, 03 January 2007 18:36

William Robertson
Messages: 1643
Registered: August 2003
Location: London, UK

Senior Member

wency wrote on Wed, 27 December 2006 01:33

If you want manual delay, then insert this:

For x IN 1..1000
          Loop
             NULL;
          End Loop;

Won't that just burn up all the CPU available? Isn't that kind of a bad idea?

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Re: Delay in loop [message #212120 is a reply to message #211056]

Wed, 03 January 2007 18:51

wency
Messages: 450
Registered: April 2006
Location: Philippines

Senior Member

In my experience, it won't.

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Re: Delay in loop [message #212210 is a reply to message #212120]

Thu, 04 January 2007 04:32

William Robertson
Messages: 1643
Registered: August 2003
Location: London, UK

Senior Member

In my experience, and Tom Kyte's, it will.
http://oracle-wtf.blogspot.com/2006/10/pause-for-thought-part-2.html

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Re: Delay in loop [message #212352 is a reply to message #211056]

Thu, 04 January 2007 20:23

wency
Messages: 450
Registered: April 2006
Location: Philippines

Senior Member

Nice Post!
Thre's a lot on our system. I'm not aware for that 'dbms profiler', we only observe speed.
>>I don't really know whats the reason behind these code.
>>Maybe because we are using the older version, Oracle 5
>>(I'm not sure if dbms_lock is supported)
>>or most probably bacause the requirement is miliseconds delay.

Thanks for that.

Cheers,
Wency

[Updated on: Thu, 04 January 2007 20:52]

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Re: Delay in loop [message #212710 is a reply to message #211334]

Sun, 07 January 2007 22:06

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

thank u wency ... this is really a nice answer so far as sql/plsql is concerned but how will it work in forms.... create a form having a display field and a push button and then execute this ... i shall be thankful to you for this.

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Re: Delay in loop [message #212711 is a reply to message #211334]

Sun, 07 January 2007 22:10

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

thank u littlefoot ... this is really a nice answer so far as sql/plsql is concerned but how will it work in forms.... create a form having a display field and a push button and then execute this ... i shall be thankful to you for this

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Re: Delay in loop [message #212721 is a reply to message #211334]

Mon, 08 January 2007 00:04

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

SQL> create or replace procedure delay is
2 begin
3 for i in 1 .. 5
4 loop
5 dbms_output.put_line(to_char(sysdate, 'mi:ss'));
6 --dbms_lock.sleep(3);
7 end loop;
8 end delay;
9 /

Procedure created.

It is created if dbms_lock.sleep(3); this commanad is commented but it creates error otherwise.
1 Create or Replace PROCEDURE delay IS
2 BEGIN
3 for i in 1 .. 5
4 loop
5 dbms_output.put_line(to_char(sysdate, 'mi:ss'));
6 dbms_lock.sleep(3);
7 end loop;
8* END delay;
9 /

Warning: Procedure created with compilation errors.
and It also works fine if the procedure is an annonymous block.
1 begin
2 for i in 1 .. 5
3 loop
4 dbms_output.put_line(to_char(sysdate, 'mi:ss'));
5 dbms_lock.sleep(2);
6 end loop;
7* end;
SQL> /
55:28
55:30
55:32
55:34
55:36

PL/SQL procedure successfully completed.

What is the problem and how will it work in form. a form named delay.fmb is attached for further help. please help. i am waiting.

Attachment: Delay.fmb
(Size: 40.00KB, Downloaded 1272 times)

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Re: Delay in loop [message #212756 is a reply to message #212721]

Mon, 08 January 2007 03:41

William Robertson
Messages: 1643
Registered: August 2003
Location: London, UK

Senior Member

myclassic wrote on Mon, 08 January 2007 00:04

Warning: Procedure created with compilation errors.

It would save us a lot of guessing if you told us what compilation errors you were getting.

If the procedure is to be a Forms program unit, it will not be efficient to call a server-side package every time it wants to pause 1 second. You would be better looking at a Forms timer as I think someone may have mentioned (I'm afraid I don't have Forms right now and haven't used it for a while).

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Re: Delay in loop [message #212788 is a reply to message #212756]

Mon, 08 January 2007 06:18

saadatahmad
Messages: 452
Registered: March 2005
Location: Germany/Paderborn

Senior Member

hi,

I couldn't understand what you were looking for, may be you want to create a digital watch in the form. Anyway, here is your modified form.

Use timers as suggested by William Robertson.

Have a look at the When-New-Form-Instance and When-Timer-Expired trigger code in the form. They're alone doing the trick.

A delay is occurring in populating the value.

regards,
Saadat Ahmad

Attachment: Delay.fmb
(Size: 44.00KB, Downloaded 1418 times)

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Re: Delay in loop [message #212946 is a reply to message #212788]

Mon, 08 January 2007 22:02

myclassic
Messages: 136
Registered: December 2006
Location: Pakistan

Senior Member

Dear saadatahmad
Thanks Sir, I wanted to do this via loop but u have help me in an other way.... thank u really. take care.

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