【转载】NativeSQL实例

转自：http://blog.sina.com.cn/s/blog_3f2c03e301017fqz.html

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在ABAP程序中除使用 EXEC SQL 执行NativeSQL外，还有一种动态使用Native sql的方法：ADBC API

实例程序：ADBC_DEMO

SAP提供的全局类有：
cl_sql_connection
cl_sql_statement

ADBC API 简介如下：

ADBC - ABAP Database Connectivity

ADBC is an API for the Native SQL interface of the AS ABAP that is based on ABAP Objects.

The methods of ADBC make it possible to;

send database specific SQL commands to a database system and process the result
to establish and administer database connections.
While the statements of Native SQL offer exclusively static access to the Native SQL interface, ADBC makes an object orientated and dynamic access possible.

The ADBC classes all begin with the prefix CL_SQL_ or CX_SQL_ and are documented. The following paragraphs briefly introduce the most important classes.

CL_SQL_STATEMENT - Execution of SQL Statements
CL_SQL_PREPARED_STATEMENT - Prepared SQL Statements
CL_SQL_CONNECTION - Administration of Database Connections
CX_SQL_EXCEPTION - Exception Class
Notes

Note ADBC can always be used when access to a database via the Native instead of the Open SQL interface is necessary and static access is not sufficient.
ADBC does not support automatic client handling. The client ID of a database table must be specified explicitly. Note that application programs should only use data from the current client. In Multitenancy systems, this is checked by the ABAP runtime environment.

Continue
CL_SQL_STATEMENT - Execution of SQL Statements
CL_SQL_STATEMENT - Prepared SQL Statements
CL_SQL_CONNECTION - Database Connections
CX_SQL_EXCEPTION - Exception Class
Examples of ADBC

http://help.sap.com/abapdocu_702/en/abenadbc.htm