topic Re: Obscure CASE statement. in Application Development and Automation Discussions

Obscure CASE statement.

Former Member — Mon, 18 Sep 2006 04:49:02 GMT

Hello,

Can CASE be used in the following manner:

case true.

when expression1.

when expression2.

...

endcase.

Aside from functional methods can it be used for logical expressions? e.g.

case 1.

when a > b.

when a < b.

when a = b.

endcase.

Thanks,

John

Re: Obscure CASE statement.

Former Member — Mon, 18 Sep 2006 04:51:12 GMT

I guess we can use for logical expressions also

Re: Obscure CASE statement.

Former Member — Mon, 18 Sep 2006 04:51:38 GMT

Hi,

U cant use logical expressions in the when statement.

The CASE Control Structure

This control structure is introduced with the CASE statement. The CASE control structure allows you to control which statement blocks are processed based on the contents of a data object.

CASE <f>.

WHEN <f11> [OR <f 12> OR ...].

WHEN <f21>.[OR <f 22> OR ...]

WHEN <f31> [OR <f 32> OR ...].

WHEN ...

......

WHEN OTHERS.

ENDCASE.

The statement block following a WHEN statement is executed if the contents of <f> are the same as those of one of the fields <f ij >. Afterwards, the program carries on processing after the ENDCASE statement. The statement block after the optional WHEN OTHERS statement is executed if the contents of <f> does not equal any of the <f ij > contents. The last statement block must be concluded with ENDCASE.

The CASE control structure is a shortened form of the following IF structure:

IF <f> = <f11> OR <f> = <f 12> OR <f> = ...

ELSEIF <f> = <f21> OR <f> = <f 22> OR <f> =...

ELSEIF <f> = <f21> OR <f> = <f 22> OR <f> =...

ELSEIF <f> = ...

...

ELSE.

ENDIF.

You can nest CASE control structures and also combine them with IF structures. However, they must always end with an ENDCASE statement within the current processing block.

regards,

keerthi.

Re: Obscure CASE statement.

abdul_hakim — Mon, 18 Sep 2006 04:52:21 GMT

yes u can use..

Cheers,

Abdul Hakim

Re: Obscure CASE statement.

anversha_s — Mon, 18 Sep 2006 04:53:58 GMT

hi,

sure u can write like that.

rgds

anver

Re: Obscure CASE statement.

Former Member — Mon, 18 Sep 2006 04:58:43 GMT

Hi,

No, CASE statement can not be used like that. WHEN statment can not have logical expression.

Regards,

Rahul

Re: Obscure CASE statement.

Bema — Mon, 18 Sep 2006 05:03:31 GMT

hi,

No, you can not use logical expression with WHEN.