[ psqlodbc-Bugs-1000719 ] string representation for large objects ist wrong

Bugs item #1000719, was opened at 2006-08-29 13:17
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Category: None
Group: None
>Status: Closed
Resolution: None
Priority: 3
Submitted By: Thomas Zehbe (thomasz)
Assigned to: Hiroshi Inoue (hinoue)
Summary: string representation for large objects ist wrong

Initial Comment:
Trying the db sample of wxWidgets 2.7.0-1 the postgreSQL server logged this message:
LOG: Anweisung: INSERT INTO contacts (NAME,ADDRESS1,ADDRESS2,CITY,STATE,POSTCODE,COUNTRY,JOINDATE ,IS_DEV,CONTRIBS,
LINE_CNT,LANGUAGE,PICSIZE,PICTURE) VALUES ('t','','','','','','','1980-01-01 00:00:00'::timestamp,0,0,0,0,28151,'11
8667'::lo)
FEHLER: Typ »lo« existiert nicht

The isnert statement tries to insert a blob and the string represanttion ind psqlodbc driver is actually "lo", wich isn't accepted.

After changing the represantion in 2 files to "oid" blob support works.
I changed the following files:
psqlodbc.h
changed #define PG_TYPE_LO_NAME "lo"
to #define PG_TYPE_LO_NAME "oid"

and
convert.c in the ResolveOneParam() function at line 2983
from sprintf(param_string, "'%d'::lo", lobj_oid);
to sprintf(param_string, "'%d'::oid", lobj_oid);

My versions are psqlodbc 8.01.0200 and PostgreSQL 8.0.1

Hope this helps.
Regards

Thomas

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Comment By: Thomas Zehbe (thomasz)
Date: 2007-04-18 10:29

Message:
Some days ago I found the reason what I did wrong. I read
the docs of the driver and found the hint that I have to
define the type 'lo' in Postgres. Shame on me :-)
A simple
create domain lo as oid;
did the job.

Sorry for wasting your time.
Regards,
Thomas

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Comment By: Thomas Zehbe (thomasz)
Date: 2006-10-23 07:55

Message:
Hello Hiroshi Inoue,
I aggree that OIDs are not necessarily point to large
objects. But large objects are are represented by oids.A
snippet from 8.0.3 docs: "SELECT lo_creat(-1); --
returns OID of new, empty large object"

Maybe you have overseen the reported Error message:
FEHLER: Typ »lo« existiert nicht
what means in english:
ERROR: Type >lo> doesn't exist
Thats a cleartext message from the servers logfile an is
concerned this part of the insert statement reported:
28151,'118667'::lo
The first part is the number of bytes of the LO, the
second is what the driver generates for the LO. My changes
suggested are leading to this version of insert statement:
24153,'121224'::oid
which is not refused by the server.

I use 8.0.3 currently. Is it misconfigured? Any hints
would be greatly appreciated as the "lo"-version definitly
does not work.

Best Regards,

Thomas

------------------------------------------------------------ ----------

Comment By: Hiroshi Inoue (hinoue)
Date: 2006-08-30 00:49

Message:
OID doesn't necessarily pointing large objects.
If you are to handle large objects with psqlodbc
driver, please use the type LO.

regards,
Hiroshi Inoue



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