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Thread: BUG: NOT boolfield kills backend

BUG: NOT boolfield kills backend

From
Zsolt Varga
Date:
Hi,
I just found an error in every postgres versions,
(I tried 6.2.1, 6.3.2, and 6.4beta1 )

if I have a table with boolean field, and I want to negate that field,
it's kills the backend process... meanwhile 'select not ( 'T'::bool )'
works well...

create table t1 ( b bool );
insert into t1 values ( 'T' );

select not b from t1;
PQexec() -- Request was sent to backend, but backend closed the channel
before responding.
        This probably means the backend terminated abnormally before or
while processing the request.

    don't you have some idea what to do,?

    thanks,
        Redax
.----------------------------------------------------------.
|Zsolt Varga            | tel/fax:   +36 36 422811         |
| AgriaComputer LTD     | email:     redax@agria.hu        |
| System Administrator  | URL:       http://www.agria.hu/  |
`----------------------------------------------------------'

Re: [HACKERS] BUG: NOT boolfield kills backend

From
Sferacarta Software
Date:
Hello Zsolt,

venerdì, 18 settembre 98, you wrote:


ZV> Hi,
ZV> I just found an error in every postgres versions,
ZV> (I tried 6.2.1, 6.3.2, and 6.4beta1 )

ZV> if I have a table with boolean field, and I want to negate that field,
ZV> it's kills the backend process... meanwhile 'select not ( 'T'::bool )'
ZV> works well...

ZV> create table t1 ( b bool );
ZV> insert into t1 values ( 'T' );

ZV> select not b from t1;

Wrong syntax.
The logical operator must be used in WHERE condition.
Try this:  SELECT b FROM t1 WHERE NOT b;
It works! ;)

Jose'

Re: [HACKERS] BUG: NOT boolfield kills backend

From
Zsolt Varga
Date:
On Fri, 18 Sep 1998, Sferacarta Software wrote:

|ZV> create table t1 ( b bool );
|ZV> insert into t1 values ( 'T' );
|
|ZV> select not b from t1;
|
|Wrong syntax.
|The logical operator must be used in WHERE condition.
|Try this:  SELECT b FROM t1 WHERE NOT b;
|It works! ;)
yes, but what I want is to list every touple,
and negate the bool field from 'T' -> 'F' and vica verse

    thanks.

    redax

.----------------------------------------------------------.
|Zsolt Varga            | tel/fax:   +36 36 422811         |
| AgriaComputer LTD     | email:     redax@agria.hu        |
| System Administrator  | URL:       http://www.agria.hu/  |
`----------------------------------------------------------'

Re: [HACKERS] BUG: NOT boolfield kills backend

From
Bruce Momjian
Date:
Fixed.

>
> Hi,
> I just found an error in every postgres versions,
> (I tried 6.2.1, 6.3.2, and 6.4beta1 )
>
> if I have a table with boolean field, and I want to negate that field,
> it's kills the backend process... meanwhile 'select not ( 'T'::bool )'
> works well...
>
> create table t1 ( b bool );
> insert into t1 values ( 'T' );
>
> select not b from t1;
> PQexec() -- Request was sent to backend, but backend closed the channel
> before responding.
>         This probably means the backend terminated abnormally before or
> while processing the request.
>
>     don't you have some idea what to do,?
>
>     thanks,
>         Redax
> .----------------------------------------------------------.
> |Zsolt Varga            | tel/fax:   +36 36 422811         |
> | AgriaComputer LTD     | email:     redax@agria.hu        |
> | System Administrator  | URL:       http://www.agria.hu/  |
> `----------------------------------------------------------'
>
>
>


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