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* Error in ECPG and #if...
@ 1999-04-20 15:59 Pavel PaJaSoft Janousek <janousek@fonet.cz>
1999-04-21 03:36 ` Re: [INTERFACES] Error in ECPG and #if... Thomas Lockhart <lockhart@alumni.caltech.edu>
1999-04-21 11:52 ` Re: [INTERFACES] Error in ECPG and #if... Michael Meskes <meskes@postgresql.org>
0 siblings, 2 replies; 3+ messages in thread
From: Pavel PaJaSoft Janousek @ 1999-04-20 15:59 UTC (permalink / raw)
To: pgsql-interfaces
Hi all,
I use ECPG distributed with PostgreSQL 6.4.2. and I found next
error..:-(
ECPG don't know C/C++ preprocessing directives such as #if, #ifdef
etc...
I try this:
..
...
15. #if 0
16. exec sql select count (*) from
17. exec sql commit;
18. #endif
In this ECPG say: parse error on line 16.
But when I use this:
15. // exec sql select count (*) from
16. // exec sql commit;
ECPG parse this correctly...
I think, that this is wrong, that ECPG use as comment only /* and //
comment. Construction such as #if 0 is very common way to disable some
source and enable this later... - mainly in debugging proces, of cource.
Or do I something wrong?
Thanks...
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E-mail: mailto:Janousek@FoNet.Cz Tel.: +420 5 4324
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^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: [INTERFACES] Error in ECPG and #if...
1999-04-20 15:59 Error in ECPG and #if... Pavel PaJaSoft Janousek <janousek@fonet.cz>
@ 1999-04-21 03:36 ` Thomas Lockhart <lockhart@alumni.caltech.edu>
1 sibling, 0 replies; 3+ messages in thread
From: Thomas Lockhart @ 1999-04-21 03:36 UTC (permalink / raw)
To: Pavel PaJaSoft Janousek <janousek@fonet.cz>; +Cc: pgsql-interfaces
> ECPG don't know C/C++ preprocessing directives such as #if, #ifdef
> etc...
> I think, that this is wrong, that ECPG use as comment only /* and //
> comment. Construction such as #if 0 is very common way to disable some
> source and enable this later... - mainly in debugging proces, of cource.
... but this is not common for ESQL preprocessors. The problem is that
the preprocessor runs before the C/C++ preprocessor, which is the step
which actually handles the #if constructs. ecpg has no knowledge of
those constructs. Remember that to do those correctly one must also
resolve all other preprocessor kinds of things, like #include
directives.
- Tom
--
Thomas Lockhart lockhart@alumni.caltech.edu
South Pasadena, California
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: [INTERFACES] Error in ECPG and #if...
1999-04-20 15:59 Error in ECPG and #if... Pavel PaJaSoft Janousek <janousek@fonet.cz>
@ 1999-04-21 11:52 ` Michael Meskes <meskes@postgresql.org>
1 sibling, 0 replies; 3+ messages in thread
From: Michael Meskes @ 1999-04-21 11:52 UTC (permalink / raw)
To: Pavel PaJaSoft Janousek <janousek@fonet.cz>; +Cc: pgsql-interfaces
On Tue, Apr 20, 1999 at 05:59:13PM +0200, Pavel PaJaSoft Janousek wrote:
> I use ECPG distributed with PostgreSQL 6.4.2. and I found next
> error..:-(
Not really.
> ECPG don't know C/C++ preprocessing directives such as #if, #ifdef
> etc...
That's correct. ECPG only parses stuff between EXEC SQL and ';'.
> 15. #if 0
> 16. exec sql select count (*) from
> 17. exec sql commit;
> 18. #endif
This is not C code.
> In this ECPG say: parse error on line 16.
Yes, because ECPG parses all embedded SQL code. It does not know about cpp
code.
Michael
--
Michael Meskes | Go SF 49ers!
Th.-Heuss-Str. 61, D-41812 Erkelenz | Go Rhein Fire!
Tel.: (+49) 2431/72651 | Use Debian GNU/Linux!
Email: Michael.Meskes@gmx.net | Use PostgreSQL!
^ permalink raw reply [nested|flat] 3+ messages in thread
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1999-04-20 15:59 Error in ECPG and #if... Pavel PaJaSoft Janousek <janousek@fonet.cz>
1999-04-21 03:36 ` Thomas Lockhart <lockhart@alumni.caltech.edu>
1999-04-21 11:52 ` Michael Meskes <meskes@postgresql.org>
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