Re: FW: [GENERAL] Re: [ADMIN] Cannot retrieve images inserted through VB and odbc, after a table reorganization.

Hi Hiroshi,

Thanks for the response. I see a "mylog" file in the C:\ directory on the PC. But it is a one-liner which says "detaching process". Apart from that I don't see any other log file apart from the one which I posted earlier and which was a file that we directed the "tracing" option in ODBC to write to. Can you let me know how to produce the Mylog file and I shall try it it out.

Thanks.

Alanoly Andrews
Invera Inc
Tel: (514) 935-8170, ext 2328

-----Original Message-----
From: Inoue, Hiroshi [mailto:inoue(at)tpf(dot)co(dot)jp]
Sent: Monday, September 08, 2014 7:55 PM
To: Alanoly Andrews; 'pgsql-odbc(at)postgresql(dot)org'
Cc: 'Adrian Klaver'
Subject: Re: [ODBC] FW: [GENERAL] Re: [ADMIN] Cannot retrieve images inserted through VB and odbc, after a table reorganization.

(2014/09/08 23:03), Alanoly Andrews wrote:
> Hello experts in postgres-odbc,
>
> The following was the latest in a series of posts that I had made to the admin and general discussion groups. This post contains an excerpt from the log produced by the postgres odbc client when an attempt was made to retrieve an image stored on a backend postgres database (AIX server). The postgres database is 9.1.4 version. The column containing the image is defined as type "lo". The SQL is a simple one of the type "select image from table where image_key=keyvalue". In the early part of the log all return codes are 0. When the return code is 1, we get the "The buffer was too small for the GetData" and "Error reading from large object" messages. Would any of you know what these messages mean and how we can get around the problem? The code for sql retrieval is written in VB code. It should be noted that the same image(s) are retrievable through non VB/ODBC applications.
>
> Feedback very much appreciated.
>
> Alanoly Andrews.
>
> -----Original Message-----
> From: Alanoly Andrews
> Sent: Friday, September 05, 2014 11:33 AM
> To: 'Adrian Klaver'; 'Craig James'
> Cc: pgsql-admin(at)postgresql(dot)org; pgsql-general(at)postgresql(dot)org
> Subject: RE: [GENERAL] Re: [ADMIN] Cannot retrieve images inserted through VB and odbc, after a table reorganization.
>
> Hi Adrian,
>
> 1. We are storing our large objects in a table column whose datatype is "lo" (which, I understand, ultimately is in fact "bytea").
> 2. The error messge returned to the VB is, yes, very generic. And the backend postgres server does not have any messages relevant to this issue.
> 3. We set the trace on in the odbc driver and got a large log file, from which I give below the part that I think is significant.

> It refers to the "buffer size being too small". Where, in the odc settings, do we set the buffer size?

It isn't a problem.

> STELimageViewOn 834-fec EXIT SQLGetData with return code 1 (SQL_SUCCESS_WITH_INFO)
> HSTMT 0x002BFC70
> UWORD 2
> SWORD 1 <SQL_C_CHAR>
> PTR 0x0018EECF [ 0] ""
> SQLLEN 0
> SQLLEN * 0x0018EEA4 (6)
>
> DIAG [01004] The buffer was too small for the GetData. (-2)
>
> STELimageViewOn 834-fec ENTER SQLGetData
> HSTMT 0x002BFC70
> UWORD 2
> SWORD -2 <SQL_C_BINARY>
> PTR <unknown type>
> SQLLEN 0
> SQLLEN * 0x0018EE54
>
> STELimageViewOn 834-fec EXIT SQLGetData with return code 1 (SQL_SUCCESS_WITH_INFO)
> HSTMT 0x002BFC70
> UWORD 2
> SWORD -2 <SQL_C_BINARY>
> PTR <unknown type>
> SQLLEN 0
> SQLLEN * 0x0018EE54 (46165)
>
> DIAG [01004] The buffer was too small for the GetData. (-2)
>
> STELimageViewOn 834-fec ENTER SQLGetData
> HSTMT 0x002BFC70
> UWORD 2
> SWORD -2 <SQL_C_BINARY>
> PTR <unknown type>
> SQLLEN 32768
> SQLLEN * 0x003CE284
>

> STELimageViewOn 834-fec EXIT SQLGetData with return code -1 (SQL_ERROR)
> HSTMT 0x002BFC70
> UWORD 2
> SWORD -2 <SQL_C_BINARY>
> PTR <unknown type>
> SQLLEN 32768
> SQLLEN * 0x003CE284

> DIAG [S1000] Error reading from large object. (1)

This is a problem.
Could you take Mylog output and send it to me?

regards,
Hiroshi Inoue

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