使用ABAP(ADBC)和Java(JDBC)連接SAP HANA數(shù)據(jù)庫(kù)

xiongzenghui 發(fā)布于2019-08-22 16:19 / 2572人閱讀

摘要：在表里維護(hù)一條記錄，指向數(shù)據(jù)庫(kù)。里填入數(shù)據(jù)庫(kù)的主機(jī)名和端口號(hào)。如然后使用代碼創(chuàng)建一個(gè)新的，插入三條進(jìn)行，再讀出來(lái)，最后刪除實(shí)現(xiàn)類似數(shù)據(jù)庫(kù)主機(jī)名此處填入登錄密碼打印結(jié)果數(shù)據(jù)能夠成功通過從數(shù)據(jù)庫(kù)讀取出來(lái)。

在表DBCON里維護(hù)一條記錄，指向HANA數(shù)據(jù)庫(kù)。con_ENV里填入HANA數(shù)據(jù)庫(kù)的主機(jī)名和端口號(hào)。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代碼創(chuàng)建一個(gè)新的table，插入三條entry進(jìn)行，再讀出來(lái)，最后刪除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實(shí)現(xiàn)類似：

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://:30015",// ,
                                "system", "此處填入登錄密碼");
                    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打印結(jié)果：數(shù)據(jù)能夠成功通過JDBC從HANA數(shù)據(jù)庫(kù)讀取出來(lái)。