Help Center/ GaussDB/ Developer Guide(Centralized_V2.0-2.x)/ Application Development Guide/ Development Specifications
Updated on 2025-02-27 GMT+08:00
View PDF
Share

Development Specifications

If the connection pool mechanism is used during application development, comply with the following specifications:
  • If GUC parameters are set in the connection, run SET SESSION AUTHORIZATION DEFAULT;RESET ALL; to clear the connection status before you return the connection to the connection pool.
  • If a temporary table is used, delete the temporary table before you return the connection to the connection pool.

If you do not do so, the connection in the connection pool will be stateful, which affects subsequent operations on the connection pool.

Table 1 describes the compatibility of application development drivers.
Table 1 Compatibility

Driver

Compatibility

JDBC, Go, ODBC, libpq, Psycopg, and ecpg

The drivers are compatible with the earlier database version. However, to use the new features added to the drivers and database, you must upgrade the database.

Setting behavior_compat_options to 'proc_outparam_override' is applicable only in A-compatible mode.

If the driver is used in a multi-thread environment:

The JDBC driver is not thread-safe and does not guarantee that the connection methods are synchronized. The caller synchronizes the calls to the driver.