Heterogeneous database middleware access technique based on endowment insurance warning system

The invention relates to a heterogeneous database middleware access technique based on an endowment insurance warning system. The technique adopts a system which comprises a system configuration sub-module, an XML (extensible markup language) parser sub-module, an SQL (structured query language) execution sub-module, a client connection management sub-module, and a database connection management sub-module. The related operations of the system and database of the technique are submitted to a database middleware by a background business program; different database connection pools are applied in the database middleware according to the database to be connected; and the system is connected with the corresponding database through the database connection pool, transmits the obtained connection to a data interface, and executes a corresponding SQL sentence or operation according to the different database structure characteristics to obtain a return value. The heterogeneous database middleware access technique has