使用ABAP(ADBC)和Java(JDBC)连接SAP HANA数据库

在表DBCON里维护一条记录，指向HANA数据库。con_ENV里填入HANA数据库的主机名和端口号。如vmXXXX:30015

DATA: ls_new TYPE DBCON.

ls_new-con_name = 'HAN'.
ls_new-dbms = 'HDB'.
ls_new-user_name = 'system'.
ls_new-password = 'Sap12345'.
ls_new-con_env = 'vml2018:30015'.

CALL FUNCTION 'DBCON_INSERT'
EXPORTING
DBCON_WORKAREA                = ls_new
EXCEPTIONS
DBCON_KEY_EXISTS              = 1
SECURE_STORE_KEY_EXISTS       = 2
SECURE_STORE_OTHER            = 3
OTHERS                        = 4
.
IF SY-SUBRC = 0.
WRITE:/ 'Insert Successfully'.
ENDIF.
然后使用ABAP代码创建一个新的table，插入三条entry进行，再读出来，最后删除table.
TYPES:
BEGIN OF result_t,
key TYPE i,
value TYPE string,
END OF result_t.

DATA: connection TYPE dbcon-con_name VALUE 'HAN',
stmt_ref TYPE REF TO cl_sql_statement,
cx_sql_exception TYPE REF TO cx_sql_exception,
lv_text TYPE string,
res_ref TYPE REF TO cl_sql_result_set,
d_ref TYPE REF TO DATA,
result_tab TYPE TABLE OF result_t,
result_line TYPE result_t,
row_cnt TYPE i,
con_ref TYPE REF TO cl_sql_connection.

con_ref = cl_sql_connection=>get_connection( connection ).
stmt_ref = con_ref->create_statement( ).

TRY.

stmt_ref->execute_ddl( 'CREATE TABLE I042416_TESTPROC_TAB( key INT PRIMARY KEY, value NVARCHAR(255) )' ).
stmt_ref->execute_update( 'INSERT INTO I042416_TESTPROC_TAB VALUES(1, ''First value'' )' ).
stmt_ref->execute_update( 'INSERT INTO I042416_TESTPROC_TAB VALUES(2, ''Second value'' )' ).
stmt_ref->execute_update( 'INSERT INTO I042416_TESTPROC_TAB VALUES(3, ''Third value'' )' ).
res_ref = stmt_ref->execute_query( 'SELECT * FROM I042416_TESTPROC_TAB' ).
GET REFERENCE OF result_tab INTO d_ref.
res_ref->set_param_table( d_ref ).
row_cnt = res_ref->next_package( ).
stmt_ref->execute_ddl( 'DROP TABLE I042416_TESTPROC_TAB' ).
CATCH cx_sql_exception INTO cx_sql_exception.
lv_text = cx_sql_exception->get_text( ).
WRITE:/ 'Error:' , lv_text.
ENDTRY.

LOOP AT result_tab INTO result_line.
WRITE:/ 'Key:' , result_line-key, ' Value:', result_line-value.
ENDLOOP.

Java实现类似：

public static void main(String[] args) {
try
{
Class.forName("com.sap.db.jdbc.Driver");
System.out.println("Create a connection...");
con = (com.sap.db.jdbc.trace.Connection) DriverManager
.getConnection("jdbc:sap://<HANA数据库主机名>:30015",// ,
"system", "此处填入登录密码");
cs = (com.sap.db.jdbc.trace.CallableStatement) con.prepareCall("call I042416_two_par(NULL, NULL)");
cs.execute();

int index = 0;
do
{
int rowCount = 0;
com.sap.db.jdbc.trace.ResultSet rs = (com.sap.db.jdbc.trace.ResultSet)cs.getResultSet();
ResultSetMetaData metaData = rs.getMetaData();
int columnCount = metaData.getColumnCount();
while (rs != null && rs.next())
{
for (int i = 1; i <= columnCount; i++)
{
System.out.print(rs.getString(i) + " ");
if (i == columnCount)
{
System.out.println();
}
}
System.out.println("Current Result Set Index:" + index + " Row Count: " + rowCount++);

}
System.out.println("Result Set Index: " + index++);
} while(cs.getMoreResults());
}

console打印结果：数据能够成功通过JDBC从HANA数据库读取出来。

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