Re: Query never returns ...

FYI - I let the query run for 11.5 minutes before killing it off.  It
had consumed 11 minutes, 18 seconds of CPU time (reported by ps).  The
following messages are from the server log, I'm pasting in all messages
directly following the query:

010208.10:04:29.473 [24041] ProcessQuery
010208.10:15:59.212 [24041] FATAL 1:  The system is shutting down
010208.10:15:59.213 [24041] AbortCurrentTransaction

FATAL: s_lock(4001600c) at spin.c:111, stuck spinlock. Aborting.

FATAL: s_lock(4001600c) at spin.c:111, stuck spinlock. Aborting.
Server process (pid 24041) exited with status 134 at Thu Feb  8 10:17:09 2001
Terminating any active server processes...
Server processes were terminated at Thu Feb  8 10:17:09 2001

Regards,
Brice Ruth

Brice Ruth wrote:
>
> The following query:
>
> SELECT
>         tblSIDEDrugLink.DrugID,
>         tblSIDEDrugLink.MedCondID,
>         tblMedCond.PatientName AS MedCondPatientName,
>         tblMedCond.ProfessionalName AS MedCondProfessionalName,
>         tblSIDEDrugLink.Frequency,
>         tblSIDEDrugLink.SeverityLevel
> FROM
>         tblSIDEDrugLink,
>         tblMedCond
> WHERE
>         (tblSIDEDrugLink.DrugID IN ('DG-18698')) AND
>         (tblSIDEDrugLink.MedCondID = tblMedCond.MedCondID)
> ORDER BY
>         tblSIDEDrugLink.DrugID,
>         tblSIDEDrugLink.Frequency,
>         tblSIDEDrugLink.SeverityLevel,
>         tblSIDEDrugLink.MedCondID;
>
> seems to not be liked by PostgreSQL.  Table 'tblSIDEDrugLink' has the
> following structure:
>
> CREATE TABLE TBLSIDEDRUGLINK
> (
>     DRUGID                      VARCHAR(10) NOT NULL,
>     MEDCONDID                   VARCHAR(10) NOT NULL,
>     FREQUENCY                   INT2,
>     SEVERITYLEVEL               INT2,
>     CONSTRAINT PK_TBLSIDEDRUGLINK PRIMARY KEY (DRUGID, MEDCONDID)
> );
>
> with the following index:
> CREATE INDEX IX_TBLSIDEDRUGLINK1 ON TBLSIDEDRUGLINK (MEDCONDID);
>
> This table has 153,288 rows.
>
> Table 'tblMedCond' has the following structure:
>
> CREATE TABLE TBLMEDCOND
> (
>     MEDCONDID                   VARCHAR(10) NOT NULL,
>     PROFESSIONALNAME            VARCHAR(58),
>     PATIENTNAME                 VARCHAR(58),
>     CONSTRAINT PK_TBLMEDCOND PRIMARY KEY (MEDCONDID)
> );
>
> This table has 1,730 rows.
>
> The query above is made by a third-party API that I don't have the
> source for, so I can't modify the query in the API, though the
> third-party has been quite willing to help out - they may even ship me a
> 'special' version of the API if there's something in this query that
> PostgreSQL for some reason doesn't implement efficiently enough.
>
> If it would help anyone to see the query plan or such - I can modify the
> logs to show that, just let me know.
>
> Btw - I've let this query run for a while & I haven't seen it complete
> ... soooo ... I don't know if it would ever complete or not.
>
> Any help at all is as always, appreciated.
>
> Sincerest regards,
> --
> Brice Ruth
> WebProjkt, Inc.
> VP, Director of Internet Technology
> http://www.webprojkt.com/

--
Brice Ruth
WebProjkt, Inc.
VP, Director of Internet Technology
http://www.webprojkt.com/