ABAP Select data from SAP table GRRM_S_ACT_DATA_BUFFER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRRM_S_ACT_DATA_BUFFER
*  INTO TABLE @DATA(IT_GRRM_S_ACT_DATA_BUFFER2).
*--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_GRRM_S_ACT_DATA_BUFFER INDEX 1 INTO DATA(WA_GRRM_S_ACT_DATA_BUFFER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRRM_S_ACT_DATA_BUFFER>-ACTIVITY_ID = 1.
<GRRM_S_ACT_DATA_BUFFER>-ACTIVITY_TITLE = 1.
<GRRM_S_ACT_DATA_BUFFER>-DESCRIPTION = 1.
<GRRM_S_ACT_DATA_BUFFER>-CONSTRAINTS = 1.
<GRRM_S_ACT_DATA_BUFFER>-ASSUMPTIONS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRRM_S_ACT_DATA_BUFFER-ORGUNIT_ID, sy-vline,
  WA_GRRM_S_ACT_DATA_BUFFER-ORGUNIT_TITLE, sy-vline,
  WA_GRRM_S_ACT_DATA_BUFFER-CACTIVITY_ID, sy-vline,
  WA_GRRM_S_ACT_DATA_BUFFER-CACTIVITY_TITLE, sy-vline,
  WA_GRRM_S_ACT_DATA_BUFFER-VALID_FROM, sy-vline,
  WA_GRRM_S_ACT_DATA_BUFFER-VALID_TO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRRM_S_ACT_DATA_BUFFER 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_GRRM_S_ACT_DATA_BUFFER 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_GRRM_S_ACT_DATA_BUFFER INTO WA_GRRM_S_ACT_DATA_BUFFER.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_GRRM_S_ACT_DATA_BUFFER-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRRM_S_ACT_DATA_BUFFER-LANGU.
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_GRRM_S_ACT_DATA_BUFFER_STR, 
ACTIVITY_ID TYPE STRING,
ACTIVITY_TITLE TYPE STRING,
DESCRIPTION TYPE STRING,
CONSTRAINTS TYPE STRING,
ASSUMPTIONS TYPE STRING,
ORGUNIT_ID TYPE STRING,
ORGUNIT_TITLE TYPE STRING,
CACTIVITY_ID TYPE STRING,
CACTIVITY_TITLE TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
STATUS_OBJNR TYPE STRING,
STATUS_ID TYPE STRING,
STATUS TYPE STRING,
STATUS_TRAN TYPE STRING,
STATUS_UPDATED TYPE STRING,
FULLY_BUFFERED TYPE STRING,
COMMAND TYPE STRING,
HR_KEY TYPE STRING,
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
LANGU TYPE STRING,
FILLER TYPE STRING,
SEQNR TYPE STRING,
TABNR TYPE STRING,
TABSEQNR TYPE STRING,
UPDATED TYPE STRING,
CACTIVITY_OBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRRM_S_ACT_DATA_BUFFER_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_GRRM_S_ACT_DATA_BUFFER_STR-ACTIVITY_ID sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ACTIVITY_TITLE sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-DESCRIPTION sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-CONSTRAINTS sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ASSUMPTIONS sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ORGUNIT_ID sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ORGUNIT_TITLE sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-CACTIVITY_ID sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-CACTIVITY_TITLE sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-VALID_FROM sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-VALID_TO sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-STATUS_OBJNR sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-STATUS_ID sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-STATUS sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-STATUS_TRAN sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-STATUS_UPDATED sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-FULLY_BUFFERED sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-COMMAND sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-HR_KEY sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-MANDT sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-PLVAR sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-OTYPE sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-OBJID sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-INFTY sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-SUBTY sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ISTAT sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-PRIOX sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-BEGDA sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-ENDDA sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-LANGU sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-FILLER sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-SEQNR sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-TABNR sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-TABSEQNR sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-UPDATED sy-vline 
WA_GRRM_S_ACT_DATA_BUFFER_STR-CACTIVITY_OBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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