Create an ABAP Managed Database Procedure (AMDP) and Analyze Its Performance

1. Select your project. From the context menu, choose New > ABAP Package.

   

2. Enter a name and description for your package, then choose Next.

   

3. Create or assign a transport request and choose Finish.

1. Again, from the context menu of your package, choose New > ABAP Class.

2. Enter a name and description, then choose Next.

   • Name: ZCL_AMDP_DEMO_XXX
   • Description: AMDP Demo w Flight Ref Scenario

3. Assign the transport request and choose Finish.

Add two interfaces by adding this code to the public section. Ignore the warning for now.

• if_amdp_marker_hdb defines the class as an AMDP class, allowing you to implement AMDP methods - that is, ABAP methods that call a SAP HANA database procedure from within a global ABAP class.

• if_oo_adt_classrun allows you to output the results to the ABAP Console.

INTERFACES: if_amdp_marker_hdb,
if_oo_adt_classrun.

Add these structures and types to the public section, just after the interface definitions. Note the data elements that you imported earlier.

TYPES:
  BEGIN OF ty_result_line,
    airline           TYPE /dmo/carrier_name,
    flight_connection TYPE /dmo/connection_id,
    old_price         TYPE /dmo/flight_price,
    old_currency      TYPE /dmo/currency_code,
    new_price         TYPE /dmo/flight_price,
    new_currency      TYPE /dmo/currency_code,
  END OF ty_result_line,

  BEGIN OF ty_flights_line,
    airline           TYPE /dmo/carrier_name,
    flight_connection TYPE /dmo/connection_id,
    price             TYPE /dmo/flight_price,
    currency          TYPE /dmo/currency_code,
  END OF ty_flights_line,

  ty_result_table  TYPE STANDARD TABLE OF ty_result_line WITH EMPTY KEY,
  ty_flights_table TYPE STANDARD TABLE OF ty_flights_line WITH EMPTY KEY,
  ty_flights       TYPE STANDARD TABLE OF /dmo/flight.

Add these two method definitions to your code. Ignore the errors for now.

METHODS:
  get_flights
    EXPORTING
              VALUE(result) TYPE ty_result_table
    RAISING   cx_amdp_execution_error,

  convert_currency
    IMPORTING
              VALUE(flights) TYPE ty_flights_table
    EXPORTING
              VALUE(result)  TYPE ty_result_table
    RAISING   cx_amdp_execution_error.

Both of these are AMDP methods.

1. In the class definition, select any one of the methods and choose Add 3 unimplemented methods. All three (empty) implementations will appear in the class implementation.

   

   

2. Add the following to the method implementation get_flights. Both this and convert_currency are SQLScript.

   For more information on SAP HANA SQLScript, see SAP HANA SQLScript Reference

   ABAP Copy

   
   METHOD GET_FLIGHTS by database procedure
     for hdb
     language sqlscript
     options read-only
     using
       /dmo/flight
       /dmo/carrier
       ZCL_AMDP_DEMO_XXX=>convert_currency.

   You must specify all ABAP tables, views, and AMDP procedures in the USING clause. For more details on these clauses, see ABAP Keyword Documentation: Method - By Database Procedure, Function

3. Add the SELECT statement. Ignore the warning for now.

   ABAP Copy

   flights = select distinct
   
     from "/DMO/FLIGHT"  as f
     inner join "/DMO/CARRIER" as c
       on f.carrier_id = c.carrier_id;   

4. Add the fields. You can do this using Auto-complete (Ctrl+1), to make sure you are using the correct field names.

   ABAP Copy

   
   flights = select distinct
     c.name as airline,
     f.connection_id as flight_connection,
     f.price    as price,
     f.currency_code as currency
     from "/DMO/FLIGHT"  as f
     inner join "/DMO/CARRIER" as c
       on f.carrier_id = c.carrier_id;

5. Finally, call the other AMDP method, convert_currency. Your method should look like this:

   ABAP Copy

   
   METHOD get_flights BY DATABASE PROCEDURE
     FOR HDB
     LANGUAGE SQLSCRIPT
     OPTIONS READ-ONLY
     USING
       /dmo/flight
       /dmo/carrier
       ZCL_AMDP_DEMO_XXX=>convert_currency.
   
     flights = select distinct
       c.name as airline,
       f.connection_id as flight_connection,
       f.price    as price,
       f.currency_code as currency
       from "/DMO/FLIGHT"  as f
       inner join "/DMO/CARRIER" as c
         on f.carrier_id = c.carrier_id;
   
     call "ZCL_AMDP_DEMO_XXX=>CONVERT_CURRENCY"( :flights, result );
   
   ENDMETHOD.

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      <span class="step-label">Step 7</span>
      <span class="step-title-text">Implement the method convert_currency</span>
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Similarly, implement the `convert_currency` method.

```ABAP

METHOD convert_currency BY DATABASE PROCEDURE
  FOR HDB
  LANGUAGE SQLSCRIPT
  OPTIONS READ-ONLY.

  declare today date;
  declare new_currency nvarchar(3);

  select current_date into today from dummy;
  new_currency := 'EUR';

  result = select distinct
    airline,
    flight_connection,
    price    as old_price,
    currency as old_currency,
    convert_currency(
      "AMOUNT"          => price,
      "SOURCE_UNIT"     => currency,
      "TARGET_UNIT"     => :new_currency,
      "REFERENCE_DATE"  => :today,
      "CLIENT"          => '100',
      "ERROR_HANDLING"  => 'set to null',
      "SCHEMA"          => current_schema
    ) as new_price,
    :new_currency as new_currency
    from :flights;

ENDMETHOD.

Finally, implement the main method of the interface if_oo_adt_classrun. This will allow you to output your results to the ABAP Console.

1. Call the method get_flights from the current instance of the class:

   ABAP Copy

   me->get_flights(
     IMPORTING
       result = DATA(lt_result) ).

2. Output the result to the console:

   out->write( lt_result ).

3. Wrap this in an exception:

   ABAP Copy

   TRY.
   
   CATCH cx_amdp_execution_error INTO DATA(lx_amdp).
     out->write( lx_amdp->get_longtext( ) ).

Your method should now look like this:

METHOD if_oo_adt_classrun~main.

  TRY.
      me->get_flights(
        IMPORTING
          result = DATA(lt_result) ).

    CATCH cx_amdp_execution_error INTO DATA(lx_amdp).
      out->write( lx_amdp->get_longtext( ) ).
  ENDTRY.

  out->write( lt_result ).

ENDMETHOD.

Your code should look like this.

CLASS ZCL_AMDP_DEMO_XXX DEFINITION
  PUBLIC
  FINAL
  CREATE PUBLIC .

  PUBLIC SECTION.
    INTERFACES: if_amdp_marker_hdb,
                if_oo_adt_classrun.

    TYPES:
      BEGIN OF ty_result_line,
        airline           TYPE /dmo/carrier_name,
        flight_connection TYPE /dmo/connection_id,
        old_price         TYPE /dmo/flight_price,
        old_currency      TYPE /dmo/currency_code,
        new_price         TYPE /dmo/flight_price,
        new_currency      TYPE /dmo/currency_code,
      END OF ty_result_line,

      BEGIN OF ty_flights_line,
        airline           TYPE /dmo/carrier_name,
        flight_connection TYPE /dmo/connection_id,
        price             TYPE /dmo/flight_price,
        currency          TYPE /dmo/currency_code,
      END OF ty_flights_line,

      ty_result_table  TYPE STANDARD TABLE OF ty_result_line WITH EMPTY KEY,
      ty_flights_table TYPE STANDARD TABLE OF ty_flights_line WITH EMPTY KEY,
      ty_flights       TYPE STANDARD TABLE OF /dmo/flight.

    METHODS:
      get_flights
        EXPORTING
                  VALUE(result) TYPE ty_result_table
        RAISING   cx_amdp_execution_error,

      convert_currency
        IMPORTING
                  VALUE(flights) TYPE ty_flights_table
        EXPORTING
                  VALUE(result)  TYPE ty_result_table
        RAISING   cx_amdp_execution_error.

  PROTECTED SECTION.
  PRIVATE SECTION.
ENDCLASS.



CLASS ZCL_AMDP_DEMO_XXX IMPLEMENTATION.
  METHOD get_flights BY DATABASE PROCEDURE
    FOR HDB
    LANGUAGE SQLSCRIPT
    OPTIONS READ-ONLY
    USING
      /dmo/flight
      /dmo/carrier
      ZCL_AMDP_DEMO_XXX=>convert_currency.


    flights = select distinct
      c.name as airline,
      f.connection_id as flight_connection,
      f.price    as price,
      f.currency_code as currency
      from "/DMO/FLIGHT"  as f
      inner join "/DMO/CARRIER" as c
        on f.carrier_id = c.carrier_id;

    call "ZCL_AMDP_DEMO_XXX=>CONVERT_CURRENCY"( :flights, result );

  ENDMETHOD.


  METHOD convert_currency BY DATABASE PROCEDURE
    FOR HDB
    LANGUAGE SQLSCRIPT
    OPTIONS READ-ONLY.

    declare today date;
    declare new_currency nvarchar(3);

    select current_date into today from dummy;
    new_currency := 'EUR';

    result = select distinct
      airline,
      flight_connection,
      price    as old_price,
      currency as old_currency,
      convert_currency(
        "AMOUNT"          => price,
        "SOURCE_UNIT"     => currency,
        "TARGET_UNIT"     => :new_currency,
        "REFERENCE_DATE"  => :today,
        "CLIENT"          => '100',
        "ERROR_HANDLING"  => 'set to null',
        "SCHEMA"          => current_schema
      ) as new_price,
      :new_currency as new_currency
      from :flights;

  ENDMETHOD.


  METHOD if_oo_adt_classrun~main.

    TRY.
        me->get_flights(
          IMPORTING
            result = DATA(lt_result) ).

      CATCH cx_amdp_execution_error INTO DATA(lx_amdp).
        out->write( lx_amdp->get_longtext( ) ).
    ENDTRY.

    out->write( lt_result ).

  ENDMETHOD.
ENDCLASS.

1. Format, save, and activate your code by choosing Shift+F1, Ctrl+S, Ctrl+F3.

2. Test your class by running it the ABAP Console ( F9 ).

Your output should look like this:

You will run your class again in the ABAP Console. First, however, you will specify that the AMDP trace is to be enabled this time.

1. From the context menu of the editor, choose Profile As > ABAP Application (Console).

   

2. In the dialog that appears, choose AMDP trace options > Enable AMDP trace. Leave the other settings as they are, then choose Finish.

   

The class will run again, outputting the same data to the Console and also creating an ABAP Trace.

Now, you will examine the ABAP Trace you have created.

1. Open the ABAP Traces view, by choosing it from Quick Access.

   

   .

   

2. The view opens below the Class Editor, beside the Console. If necessary, refresh the view ( F5 ). Double-click on your class.

   

The Trace Results view appears. The ABAP Managed Database Procedures tab appears to the right.

In older versions of SAP AS ABAP (earlier than 7.55): In the ABAP Profiler display for the AMDP Trace, the column “Execution Time” sometimes contains values that are larger than the values in column “Duration”. As the ABAP Profiler usually displays elapsed time, the column “Execution Time” may only be smaller than “Duration”, as there might be some “Compile Time” involved in the overall duration.

This is a known issue and is fixed in SAP AS ABAP Release 7.55.

For more details, see: SAP Note 2874907 - Display Elapsed Time Values in AMDP Profiler

• SAP Help Portal: ABAP Managed Database Procedures (AMDP)

• SAP Help Portal: Working with the AMDP Profiler

• ABAP Keyword Documentation: AMDP - ABAP Managed Database Procedures