ibm_db - set driver path to DLL libs (fix #223)

Author: amochin

src/DatabaseLibrary/connection_manager.py

@@ -13,6 +13,7 @@
 #  limitations under the License.
 
 import importlib
+import os
 from configparser import ConfigParser, NoOptionError, NoSectionError
 from dataclasses import dataclass
 from pathlib import Path
@@ -316,6 +317,22 @@ def _arg_or_config(arg_value, param_name, *, old_param_name=None, mandatory=Fals
             db_api_module_name = "pyodbc"
         else:
             db_api_module_name = db_module
+
+        if db_api_module_name in ["ibm_db", "ibm_db_dbi"]:
+            if os.name == "nt":
+                spec = importlib.util.find_spec("ibm_db")
+                if spec is not None:
+                    logger.info(
+                        f"Importing DB module '{db_api_module_name}' on Windows requires configuring the DLL directory for CLI driver"
+                    )
+                    site_packages_path = os.path.dirname(spec.origin)
+                    clidriver_bin_path = os.path.join(site_packages_path, "clidriver", "bin")
+                    if os.path.exists(clidriver_bin_path):
+                        os.add_dll_directory(clidriver_bin_path)
+                        logger.info(f"Added default CLI driver location to DLL search path: '{clidriver_bin_path}'")
+                    else:
+                        logger.info(f"Default CLI driver location folder not found: '{clidriver_bin_path}'")
+
         db_api_2 = importlib.import_module(db_api_module_name)
 
         if db_module in ["MySQLdb", "pymysql"]: