ERROR: Could not build wheels for pymssql which use PEP 517 and cannot be installed directly

Question

I'm trying to install pymssql from pip on Windows. Problem is, I keep getting the following error:

ERROR: Failed building wheel for pymssql
Failed to build pymssql
ERROR: Could not build wheels for pymssql which use PEP 517 and cannot be installed directly

Full log is as follows:

Building wheels for collected packages: pymssql
  Building wheel for pymssql (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: 'c:\users\administrator\appdata\local\programs\python\python39\python.exe' 'c:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\ADMINI~1\AppData\Local\Temp\tmpvh65n1en'
       cwd: C:\Users\Administrator\AppData\Local\Temp\pip-install-skfrg8ce\pymssql_3826b234076b47ab9618e9d73ff9698b
  Complete output (16 lines):
  setup.py: platform.system() => 'Windows'
  setup.py: platform.architecture() => ('64bit', 'WindowsPE')
  running bdist_wheel
  running build
  running build_ext
  cythoning src\_mssql.pyx to src\_mssql.c
  cythoning src\pymssql.pyx to src\pymssql.c
  building '_mssql' extension
  creating build
  creating build\temp.win-amd64-3.9
  creating build\temp.win-amd64-3.9\Release
  creating build\temp.win-amd64-3.9\Release\src
  C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.28.29333\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Ifreetds\include -IC:\Users\Administrator\AppData\Local\Temp\pip-install-skfrg8ce\pymssql_3826b234076b47ab9618e9d73ff9698b\build\include -Ic:\users\administrator\appdata\local\programs\python\python39\include -Ic:\users\administrator\appdata\local\programs\python\python39\include -IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.28.29333\include -IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared -IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um -IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt /Tcsrc\_mssql.c /Fobuild\temp.win-amd64-3.9\Release\src\_mssql.obj -DMSDBLIB
  _mssql.c
  src\_mssql.c(611): fatal error C1083: Cannot open include file: 'sqlfront.h': No such file or directory
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.28.29333\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2

Has anybody had this issue? I've searched far and wide, but no answers. I tried downgrading pip and also tried install older versions of pymssql, but no luck.

Answer 1

You're missing some header (and likely library) files needed to build the extension.

Unless you want to build from scratch, it'll probably be easier to get the suitable prebuilt wheel from Dave Gohlke's Windows wheels page and install it with Pip. Be sure to choose the correct file for your Python version and bitness.

Answer 2

I meet the same error,different solution.

I.m using mac + py3.9

solution:

brew install freetds

error info:

Collecting pymssql
  Using cached pymssql-2.1.5.tar.gz (167 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Installing backend dependencies ... done
    Preparing wheel metadata ... done
Building wheels for collected packages: pymssql
  Building wheel for pymssql (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: /usr/local/opt/[email protected]/bin/python3.9 /usr/local/lib/python3.9/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /var/folders/ch/88r0y0hx02v5v903bl4pf4c40000gn/T/tmp053ptsxm
       cwd: /private/var/folders/ch/88r0y0hx02v5v903bl4pf4c40000gn/T/pip-install-klunmran/pymssql
  Complete output (33 lines):
  setup.py: platform.system() => 'Darwin'
  setup.py: platform.architecture() => ('64bit', '')
  setup.py: platform.libc_ver() => ('', '')
  setup.py: Detected Darwin/Mac OS X.
      You can install FreeTDS with Homebrew or MacPorts, or by downloading
      and compiling it yourself.

      Homebrew (http://brew.sh/)
      --------------------------
      brew install freetds

      MacPorts (http://www.macports.org/)
      -----------------------------------
      sudo port install freetds

  setup.py: Not using bundled FreeTDS
  setup.py: include_dirs = ['/usr/local/include']
  setup.py: library_dirs = ['/usr/local/lib']
  running bdist_wheel
  running build
  running build_ext
  cythoning src/_mssql.pyx to src/_mssql.c
  cythoning src/pymssql.pyx to src/pymssql.c
  building '_mssql' extension
  creating build
  creating build/temp.macosx-10.15-x86_64-3.9
  creating build/temp.macosx-10.15-x86_64-3.9/src
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -I/usr/local/include -I/usr/local/include -I/usr/local/opt/[email protected]/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/[email protected]/3.9.0_1/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/_mssql.c -o build/temp.macosx-10.15-x86_64-3.9/src/_mssql.o -DMSDBLIB
  src/_mssql.c:611:10: fatal error: 'sqlfront.h' file not found
  #include "sqlfront.h"
           ^~~~~~~~~~~~
  1 error generated.
  error: command '/usr/bin/clang' failed with exit code 1
  ----------------------------------------
  ERROR: Failed building wheel for pymssql
Failed to build pymssql
ERROR: Could not build wheels for pymssql which use PEP 517 and cannot be installed directly

Answer 3

After changing the version of Python from 3.8.2 to 3.9.5, was able to run the pip command.