ABAP Select data from SAP table DDMASSCTRL into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DDMASSCTRL table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to DDMASSCTRL. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the DDMASSCTRL table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_DDMASSCTRL TYPE STANDARD TABLE OF DDMASSCTRL,
      WA_DDMASSCTRL TYPE DDMASSCTRL,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <DDMASSCTRL> TYPE DDMASSCTRL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DDMASSCTRL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DDMASSCTRL
  INTO TABLE IT_DDMASSCTRL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDMASSCTRL
*  INTO TABLE @DATA(IT_DDMASSCTRL2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_DDMASSCTRL INDEX 1 INTO DATA(WA_DDMASSCTRL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DDMASSCTRL ASSIGNING <DDMASSCTRL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDMASSCTRL>-LEVEL = 1.
<DDMASSCTRL>-INACTIVE = 1.
<DDMASSCTRL>-AUTH_CHK = 1.
<DDMASSCTRL>-DEPACT = 1.
<DDMASSCTRL>-T_ON = 1.

ENDLOOP.

LOOP AT IT_DDMASSCTRL INTO WA_DDMASSCTRL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDMASSCTRL-COUNTER, sy-vline,
  WA_DDMASSCTRL-ACT_S, sy-vline,
  WA_DDMASSCTRL-EXCOMMIT, sy-vline,
  WA_DDMASSCTRL-RC_IN, sy-vline,
  WA_DDMASSCTRL-MEDIUM, sy-vline,
  WA_DDMASSCTRL-TEST_ON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDMASSCTRL you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_DDMASSCTRL TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_DDMASSCTRL INTO WA_DDMASSCTRL.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DDMASSCTRL_STR, 
LEVEL TYPE STRING,
INACTIVE TYPE STRING,
AUTH_CHK TYPE STRING,
DEPACT TYPE STRING,
T_ON TYPE STRING,
COUNTER TYPE STRING,
ACT_S TYPE STRING,
EXCOMMIT TYPE STRING,
RC_IN TYPE STRING,
MEDIUM TYPE STRING,
TEST_ON TYPE STRING,
FOLLOW TYPE STRING,
PARALLEL TYPE STRING,
MAXTASKS TYPE STRING,
RESPERC TYPE STRING,
PRID TYPE STRING,
PRID1 TYPE STRING,
GRPPRID TYPE STRING,
WRITE_LOG TYPE STRING,
BEGIN TYPE STRING,
END TYPE STRING,
LOGNAME TYPE STRING,
DEVICE TYPE STRING,
UUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDMASSCTRL_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_DDMASSCTRL_STR-LEVEL sy-vline 
WA_DDMASSCTRL_STR-INACTIVE sy-vline 
WA_DDMASSCTRL_STR-AUTH_CHK sy-vline 
WA_DDMASSCTRL_STR-DEPACT sy-vline 
WA_DDMASSCTRL_STR-T_ON sy-vline 
WA_DDMASSCTRL_STR-COUNTER sy-vline 
WA_DDMASSCTRL_STR-ACT_S sy-vline 
WA_DDMASSCTRL_STR-EXCOMMIT sy-vline 
WA_DDMASSCTRL_STR-RC_IN sy-vline 
WA_DDMASSCTRL_STR-MEDIUM sy-vline 
WA_DDMASSCTRL_STR-TEST_ON sy-vline 
WA_DDMASSCTRL_STR-FOLLOW sy-vline 
WA_DDMASSCTRL_STR-PARALLEL sy-vline 
WA_DDMASSCTRL_STR-MAXTASKS sy-vline 
WA_DDMASSCTRL_STR-RESPERC sy-vline 
WA_DDMASSCTRL_STR-PRID sy-vline 
WA_DDMASSCTRL_STR-PRID1 sy-vline 
WA_DDMASSCTRL_STR-GRPPRID sy-vline 
WA_DDMASSCTRL_STR-WRITE_LOG sy-vline 
WA_DDMASSCTRL_STR-BEGIN sy-vline 
WA_DDMASSCTRL_STR-END sy-vline 
WA_DDMASSCTRL_STR-LOGNAME sy-vline 
WA_DDMASSCTRL_STR-DEVICE sy-vline 
WA_DDMASSCTRL_STR-UUID sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.