SQL Relay is a persistent database connection pooling, proxying, throttling,
load balancing and query routing/filtering system for Unix and Linux
supporting ODBC, Oracle, MySQL, PostgreSQL, SAP/Sybase, MS SQL Server, IBM
DB2, Informix, Firebird, SQLite and MS Access (minimally) with APIs for C,
C++, .NET, Perl, Perl-DBI, Python, Python-DB, PHP, PHP PDO, Ruby, Java, TCL,
Erlang, and node.js, ODBC and ADO.NET drivers, drop-in replacement libraries
for MySQL and PostgreSQL, command line clients and extensive documentation.
The APIs support advanced database operations such as bind variables, multi-row
fetches, client-side result set caching and suspended transactions. It is
ideal for speeding up database-driven web-based applications, accessing
databases from unsupported platforms, migrating between databases, distributing
access to replicated or clustered databases and throttling database access.