Thanks Ann for your explanations !
From: Ann Harrison
To: firebird-support@yahoogroups.com
Sent: Thursday, September 13, 2012 12:21 AM
Subject: Re: [firebird-support] Strange SELECT FIRST 1
On Wed, Sep 12, 2012 at 3:25 PM, Mr. John wrote:
> Hi
On Wed, Sep 12, 2012 at 3:25 PM, Mr. John wrote:
> Hi Ann,thanks for your tips,so SELECT FIRST 1 is slower than
> simple SELECT ?
>
Not in general, but why complicate things?
> Why to add ORDER BY ?
>
That gives you a chance of getting the same record every time.Lets
assume you have a
Hi Ann,thanks for your tips,so SELECT FIRST 1 is slower than simple SELECT ?
Why to add ORDER BY ?
Thanks !
From: Ann Harrison
To: firebird-support@yahoogroups.com
Sent: Wednesday, September 12, 2012 9:09 PM
Subject: Re: [firebird-support] Strange SELECT
On Wed, Sep 12, 2012 at 6:18 AM, Mr. John wrote:
> Hi,I'm using FB 2.5.1.26351 SS on XP SP3,I have one stored
> procedure,also inside
> FOR EXECUTE STATEMENT loop I have this query
>
> SELECT FIRST 1 id_cf,numar FROM CB_FC WHERE ID_CF=:wid_cf
> AND numar=:wNUMAR INTO :xid_cf,:xnumar;
>
That
Thanks all for your help,I'll review my code to fix that
From: Lucas Franzen
To: firebird-support@yahoogroups.com
Sent: Wednesday, September 12, 2012 2:21 PM
Subject: Re: [firebird-support] Strange SELECT FIRST 1
Am 12.09.2012 13:13, schrieb Mr.
Am 12.09.2012 13:13, schrieb Mr. John:
> Hi masotti ,thanks for your answer,I always thought in this case when
> select doesn't return a record,these variables are set to NULL,that I
> was wrong ?
>
Yes.
Null is an unknown value, whereas returning no record is not unknown,
it's just nothing.
S
03 PM
Subject: Re: [firebird-support] Strange SELECT FIRST 1
Hi,
On 12/09/2012 12:18, Mr. John wrote:
> What I don't understand,for this query
> ...
>SELECT FIRST 1 id_cf,numar FROM CB_FC WHERE ID_CF=:wid_cf AND
> numar=:wNUMAR INTO :xid_cf,:xnumar;
>
Hi,
On 12/09/2012 12:18, Mr. John wrote:
> What I don't understand,for this query
> ...
>SELECT FIRST 1 id_cf,numar FROM CB_FC WHERE ID_CF=:wid_cf AND
> numar=:wNUMAR INTO :xid_cf,:xnumar;
>IF (wNUMAR=10739 and wid_cf=202) THEN
>begin
>
Hi,I'm using FB 2.5.1.26351 SS on XP SP3,I have one stored procedure,also
inside
FOR EXECUTE STATEMENT loop I have this query
SELECT FIRST 1 id_cf,numar FROM CB_FC WHERE ID_CF=:wid_cf
AND numar=:wNUMAR INTO :xid_cf,:xnumar;
wNUMAR,wid_cf are also variables
declare xID_CF bigint;DEC
