[C++][FlightRPC][Packaging] ODBC MSI installer missing arrow_flight_sql_odbc.dll

[chrisfw]

Describe the bug, including details regarding any error messages, version, and platform.

Describe the bug

The ODBC MSI built by the cpp_extra.yml "ODBC Windows" CI job and uploaded as the flight-sql-odbc-msi-installer artifact is missing the core arrow_flight_sql_odbc.dll driver file. After installing the MSI, the bin directory contains only:

• arrow-file-to-stream.exe
• arrow-stream-to-file.exe
• VC++ runtime DLLs (msvcp140.dll, vcruntime140.dll, etc.)

The actual ODBC driver DLL (arrow_flight_sql_odbc.dll) is not present, making the installer non-functional. The ODBC Driver Manager reports: "The setup routines for the Apache Arrow Flight SQL ODBC driver could not be found."

This has been reproduced with MSI artifacts from both December 2025 and the February 28, 2026 nightly build (run 22532376244).

The WiX registry fragment in odbc_registry.wxs references CM_FP_arrow_flight_sql_odbc.bin.arrow_flight_sql_odbc.dll, suggesting CPack is expected to include the DLL, but it appears the arrow_flight_sql_odbc target is either not being built or not being picked up by CPack's component filtering during the CI build.

Component(s)

FlightRPC, C++, Packaging

Related issues

• [C++][FlightSQL][ODBC] Windows Installer #47787 (ODBC Windows Installer)
• [C++][CI][Packaging] Fix rsync command not found for ODBC Nightly Release step #48932 (Fix rsync build error ODBC Nightly Package)
• [C++][FlightRPC] ODBC GitHub release #48904 (Upload ODBC installer into GitHub release as RC)

Component(s)

Packaging

[amoeba]

cc @alinaliBQ

[alinaliBQ]

Thank you @chrisfw for raising this issue, feel free to cc me if you find ODBC-related issues in future.
As an attempt to reproduce the issue, I installed the ODBC MSI installer from the February 28, 2026 nightly build (run 22532376244), and I also repeated the process with the Mar 1st, 2026 MSI from https://nightlies.apache.org/arrow/odbc/, and I could not reproduce the issue on my local environment Windows x64.

The PowerShell result I got:

PS C:\Users\MyUsrname> cd "C:\Program Files\Apache-Arrow-Flight-SQL-ODBC 24.0.0\bin"
PS C:\Program Files\Apache-Arrow-Flight-SQL-ODBC 24.0.0\bin> tree /f
Folder PATH listing for volume Windows
Volume serial number is 1448-DD4E
C:.
    abseil_dll.dll
    arrow.dll
    arrow_compute.dll
    arrow_flight.dll
    arrow_flight_sql.dll
    arrow_flight_sql_odbc.dll
    boost_locale-vc143-mt-x64-1_90.dll
    cares.dll
    concrt140.dll
    libcrypto-3-x64.dll
    libprotobuf.dll
    libssl-3-x64.dll
    msvcp140.dll
    msvcp140_1.dll
    msvcp140_2.dll
    msvcp140_atomic_wait.dll
    msvcp140_codecvt_ids.dll
    re2.dll
    utf8proc.dll
    vcruntime140.dll
    vcruntime140_1.dll
    zlib1.dll

No subfolders exist

On my local machine, there isn't any .exe files installed, and the ODBC DLL and its Arrow library dependencies are installed from the MSI. It is possible that December 2025 versions may have issues (and installs unneeded .exe files), but the recent versions should work.

Currently the ODBC MSI installer is not signed (see #49404), and it is possible that security software might have silently removed any unsigned Arrow and ODBC DLLs.
I would need more information to investigate further. Could you send your platform information? It would also help if you could check the security software to see if it deleted any DLLs.