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Asked: 2026-05-11T12:56:40+00:00

I tried to trace ODBC function calls from my program working on Linux. This

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I tried to trace ODBC function calls from my program working on Linux. This program dynamically links ODBC manager and then connect to database and fetch some data.

I can trace ODBC calls with unixODBC by adding to odbcinst.ini:

[ODBC] Trace=yes TraceFile=/tmp/sql.log

This method is documented by IBM: Collecting data for an ODBC Problem

But when I change manager from unixODBC to Informix’s own manager (libifdmr.so), the trace file is not created. Anybody successfully obtained ODBC trace from Informix manager (and driver) on Linux?

Client version: CSDK 3.50UC3

I hope that it is not a bug and something is wrong with my config.

As for unixODBC: I cannot use unixODBC in multithreaded app. I use connection pool and my app segfaulted when disconnection was from another thread than connection. It is also much slower in multithreaded app.

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  1. I got ODBC trace with those settings in my odbc.ini:

    [ODBC] TRACE=1 TRACEFILE=/tmp/odbc_trace.txt TRACEDLL=idmrs09a.so

    I copied them from IBM Informix ODBC Driver Programmer’s Manual Version 3.50. So other IBM documents seems not valid while those settings are in odbc.ini instead of odbcinst.ini and you must set TRACEDLL which was not mentioned in ‘Collecting data for an ODBC Problem’ document.

    UPDATE: It seems IBM changed documentation: there is info on TRACEDLL, but odbcinst.ini remained.

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