Jincang database kingbasees client programming interface guide ODBC (2. Overview)

2.  summary

This chapter briefly introduces ODBC Background and KingbaseES Its compatibility .

This chapter contains the following ：

• ODBC sketch

• Kingbase ODBC Drive pack

2.1. ODBC sketch

ODBC yes Microsoft Provided 、 With C and C++ Language oriented SQL Server Primary native data access for applications written API.

Open database connection (ODBC) Provides a standard interface , Allow an application to access many different data sources . The source code of the application does not need to be recompiled for each data source . Database drivers link applications to specific data sources . The database driver is a dynamic link library , Applications can call the library as needed to access specific data sources . therefore , Applications can access any data source that the database driver exists . ODBC The interface is defined as follows ：

• One ODBC Function call library , Allow applications to connect to data sources , Execute structured query language (SQL) sentence , And retrieve the results .

• be based on SQL-99 canonical SQL grammar .

• A standard set of error codes .

• Standard methods for connecting and logging into data sources .

• Standard representation of data types .

The following figure shows ODBC Components of the model . The model starts from ODBC Application start , adopt ODBC Application program interface (API) Call the driver manager . The driver manager can be Microsoft Driver manager , It can also be UnixODBC Driver manager . The driver manager is still used ODBCAPI Yes ODBC Driver calls . ODBC The driver uses the database API Access the database through the network communication link , This figure shows a ODBC Applications .

2.2. Kingbase ODBC Drive pack

KingbaseES ODBC It's a standard. C Of ODBC The driver , It supports Microsoft ODBC 3.0 standard . adopt KingbaseES ODBC Driver, The application can complete the connection with the database 、 perform SQL sentence 、 Get results from the database 、 Get status and error information 、 Terminate transactions and connections .