ABAP Select data from SAP table MASSDATA_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MASSDATA_HEADER 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 MASSDATA_HEADER. 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 MASSDATA_HEADER 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_MASSDATA_HEADER TYPE STANDARD TABLE OF MASSDATA_HEADER,
      WA_MASSDATA_HEADER TYPE MASSDATA_HEADER,
      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: <MASSDATA_HEADER> TYPE MASSDATA_HEADER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MASSDATA_HEADER
*  INTO TABLE @DATA(IT_MASSDATA_HEADER2).
*--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_MASSDATA_HEADER INDEX 1 INTO DATA(WA_MASSDATA_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MASSDATA_HEADER>-OBJECT_CLASS = 1.
<MASSDATA_HEADER>-OBJECT_NAME = 1.
<MASSDATA_HEADER>-MTCS_COUNT = 1.
<MASSDATA_HEADER>-MSG_COUNT = 1.
<MASSDATA_HEADER>-KEY_COUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MASSDATA_HEADER-OTHER_COUNT, sy-vline,
  WA_MASSDATA_HEADER-REF_ID, sy-vline,
  WA_MASSDATA_HEADER-BLOCKSIZE, sy-vline,
  WA_MASSDATA_HEADER-RFCOLTP, sy-vline,
  WA_MASSDATA_HEADER-SEND_R3REL, sy-vline,
  WA_MASSDATA_HEADER-UPLOADSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MASSDATA_HEADER 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_MASSDATA_HEADER 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_MASSDATA_HEADER INTO WA_MASSDATA_HEADER.


*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.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MASSDATA_HEADER-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASSDATA_HEADER-LOGSYS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_MASSDATA_HEADER_STR, 
OBJECT_CLASS TYPE STRING,
OBJECT_NAME TYPE STRING,
MTCS_COUNT TYPE STRING,
MSG_COUNT TYPE STRING,
KEY_COUNT TYPE STRING,
OTHER_COUNT TYPE STRING,
REF_ID TYPE STRING,
BLOCKSIZE TYPE STRING,
RFCOLTP TYPE STRING,
SEND_R3REL TYPE STRING,
UPLOADSTAT TYPE STRING,
DWNLOADTYP TYPE STRING,
DELTA_OP TYPE STRING,
LASTBLOCK TYPE STRING,
BLOCKNO TYPE STRING,
RECORDNO TYPE STRING,
SEND_IFREL TYPE STRING,
RFCSERVER TYPE STRING,
QUEUENAME TYPE STRING,
IN_Q_USED TYPE STRING,
LOGSYS TYPE STRING,
OLTP_CLNT TYPE STRING,
DATAFORMAT TYPE STRING,
CHKENDEBC TYPE STRING,
CONSUMER TYPE STRING,
UC_SYSTEM TYPE STRING,
OLTP_WPPID TYPE STRING,
TEMP_INFO TYPE STRING,
LOAD_TYPE TYPE STRING,
R3_GUID TYPE STRING,
COCALL TYPE STRING,
UC_CHARSIZ TYPE STRING,
USERNAME TYPE STRING,
SITETYPE TYPE STRING,
BLOCK_PROCESSING TYPE STRING,
INQUEUENAME TYPE STRING,
TIMESTAMP_DELTA TYPE STRING,
IS_S4 TYPE STRING,
SYSTEM_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MASSDATA_HEADER_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_MASSDATA_HEADER_STR-OBJECT_CLASS sy-vline 
WA_MASSDATA_HEADER_STR-OBJECT_NAME sy-vline 
WA_MASSDATA_HEADER_STR-MTCS_COUNT sy-vline 
WA_MASSDATA_HEADER_STR-MSG_COUNT sy-vline 
WA_MASSDATA_HEADER_STR-KEY_COUNT sy-vline 
WA_MASSDATA_HEADER_STR-OTHER_COUNT sy-vline 
WA_MASSDATA_HEADER_STR-REF_ID sy-vline 
WA_MASSDATA_HEADER_STR-BLOCKSIZE sy-vline 
WA_MASSDATA_HEADER_STR-RFCOLTP sy-vline 
WA_MASSDATA_HEADER_STR-SEND_R3REL sy-vline 
WA_MASSDATA_HEADER_STR-UPLOADSTAT sy-vline 
WA_MASSDATA_HEADER_STR-DWNLOADTYP sy-vline 
WA_MASSDATA_HEADER_STR-DELTA_OP sy-vline 
WA_MASSDATA_HEADER_STR-LASTBLOCK sy-vline 
WA_MASSDATA_HEADER_STR-BLOCKNO sy-vline 
WA_MASSDATA_HEADER_STR-RECORDNO sy-vline 
WA_MASSDATA_HEADER_STR-SEND_IFREL sy-vline 
WA_MASSDATA_HEADER_STR-RFCSERVER sy-vline 
WA_MASSDATA_HEADER_STR-QUEUENAME sy-vline 
WA_MASSDATA_HEADER_STR-IN_Q_USED sy-vline 
WA_MASSDATA_HEADER_STR-LOGSYS sy-vline 
WA_MASSDATA_HEADER_STR-OLTP_CLNT sy-vline 
WA_MASSDATA_HEADER_STR-DATAFORMAT sy-vline 
WA_MASSDATA_HEADER_STR-CHKENDEBC sy-vline 
WA_MASSDATA_HEADER_STR-CONSUMER sy-vline 
WA_MASSDATA_HEADER_STR-UC_SYSTEM sy-vline 
WA_MASSDATA_HEADER_STR-OLTP_WPPID sy-vline 
WA_MASSDATA_HEADER_STR-TEMP_INFO sy-vline 
WA_MASSDATA_HEADER_STR-LOAD_TYPE sy-vline 
WA_MASSDATA_HEADER_STR-R3_GUID sy-vline 
WA_MASSDATA_HEADER_STR-COCALL sy-vline 
WA_MASSDATA_HEADER_STR-UC_CHARSIZ sy-vline 
WA_MASSDATA_HEADER_STR-USERNAME sy-vline 
WA_MASSDATA_HEADER_STR-SITETYPE sy-vline 
WA_MASSDATA_HEADER_STR-BLOCK_PROCESSING sy-vline 
WA_MASSDATA_HEADER_STR-INQUEUENAME sy-vline 
WA_MASSDATA_HEADER_STR-TIMESTAMP_DELTA sy-vline 
WA_MASSDATA_HEADER_STR-IS_S4 sy-vline 
WA_MASSDATA_HEADER_STR-SYSTEM_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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