SQL Anywhere includes support for six external runtime environments. These include embedded SQL and ODBC applications written in C/C++, and applications written in Java, Perl, PHP, or languages such as C# and Visual Basic that are based on the Microsoft .NET Framework Common Language Runtime (CLR).
SQL Anywhere has had the ability to call compiled native functions written in C or C++ for some time. However, when these procedures are run by the database server, the dynamic link library or shared object has always been loaded by the database server and the calls out to the native functions have always been made by the database server. The risk here is that if the native function causes a fault, then the database server crashes. Running compiled native functions outside the database server, in an external environment, eliminates these risks to the server.
The following is an overview of the external environment support in SQL Anywhere.
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