Unique codes provided when server exception occur, which printed by Proxy backend or JDBC startup logs.

    Error CodeReason
    SPI-00001No implementation class load from SPI %s with type %s.
    DATA-SOURCE-00001Data source unavailable.
    PROPS-00001Value %s of %s cannot convert to type %s.
    PROXY-00001Load database server info failed.
    SPRING-00001Can not find JNDI data source.
    SPRING-SHARDING-00001Can not support type %s.