In ODBC Version 3, SQLAllocEnv() was deprecated and replaced with SQLAllocHandle(); see SQLAllocHandle--Allocate handle for more information.
Recommendation: Although this version of DB2 CLI continues to support SQLAllocEnv(), use SQLAllocHandle() in your DB2 CLI programs so that they conform to the latest standards.
Migrating to the new function
The statement:
SQLAllocEnv(henv);
for example, would be rewritten using the new function as:
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, henv);
Related reference