ABAP Select data from SAP table /ISDFPS/OM_REF_ALV4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/OM_REF_ALV4 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 /ISDFPS/OM_REF_ALV4. 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 /ISDFPS/OM_REF_ALV4 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_/ISDFPS/OM_REF_ALV4 TYPE STANDARD TABLE OF /ISDFPS/OM_REF_ALV4,
      WA_/ISDFPS/OM_REF_ALV4 TYPE /ISDFPS/OM_REF_ALV4,
      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: </ISDFPS/OM_REF_ALV4> TYPE /ISDFPS/OM_REF_ALV4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/ISDFPS/OM_REF_ALV4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/OM_REF_ALV4
  INTO TABLE IT_/ISDFPS/OM_REF_ALV4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/OM_REF_ALV4
*  INTO TABLE @DATA(IT_/ISDFPS/OM_REF_ALV42).
*--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_/ISDFPS/OM_REF_ALV4 INDEX 1 INTO DATA(WA_/ISDFPS/OM_REF_ALV42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/OM_REF_ALV4 ASSIGNING </ISDFPS/OM_REF_ALV4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/OM_REF_ALV4>-ICON_S_ORIGIN = 1.
</ISDFPS/OM_REF_ALV4>-OBJID = 1.
</ISDFPS/OM_REF_ALV4>-OTYPE = 1.
</ISDFPS/OM_REF_ALV4>-ISTAT = 1.
</ISDFPS/OM_REF_ALV4>-STEXT_ISTAT = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/OM_REF_ALV4 INTO WA_/ISDFPS/OM_REF_ALV4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/OM_REF_ALV4-BEGDA, sy-vline,
  WA_/ISDFPS/OM_REF_ALV4-ENDDA, sy-vline,
  WA_/ISDFPS/OM_REF_ALV4-SHORT, sy-vline,
  WA_/ISDFPS/OM_REF_ALV4-STEXT, sy-vline,
  WA_/ISDFPS/OM_REF_ALV4-ICON_O_ORIGIN, sy-vline,
  WA_/ISDFPS/OM_REF_ALV4-OBJID_OA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/OM_REF_ALV4 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_/ISDFPS/OM_REF_ALV4 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_/ISDFPS/OM_REF_ALV4 INTO WA_/ISDFPS/OM_REF_ALV4.


*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_/ISDFPS/OM_REF_ALV4_STR, 
ICON_S_ORIGIN TYPE STRING,
OBJID TYPE STRING,
OTYPE TYPE STRING,
ISTAT TYPE STRING,
STEXT_ISTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
ICON_O_ORIGIN TYPE STRING,
OBJID_OA TYPE STRING,
OTYPE_OA TYPE STRING,
ISTAT_OA TYPE STRING,
STEXT_ISTAT_OA TYPE STRING,
BEGDA_OA TYPE STRING,
ENDDA_OA TYPE STRING,
SHORT_OA TYPE STRING,
STEXT_OA TYPE STRING,
ICON_P_DEST TYPE STRING,
OBJID_PZ TYPE STRING,
OTYPE_PZ TYPE STRING,
ISTAT_PZ TYPE STRING,
STEXT_ISTAT_PZ TYPE STRING,
BEGDA_PZ TYPE STRING,
ENDDA_PZ TYPE STRING,
SHORT_PZ TYPE STRING,
STEXT_PZ TYPE STRING,
ICON_S_DEST TYPE STRING,
OBJID_SZ TYPE STRING,
OTYPE_SZ TYPE STRING,
ISTAT_SZ TYPE STRING,
STEXT_ISTAT_SZ TYPE STRING,
BEGDA_SZ TYPE STRING,
ENDDA_SZ TYPE STRING,
SHORT_SZ TYPE STRING,
STEXT_SZ TYPE STRING,
ICON_O_DEST TYPE STRING,
OBJID_OZ TYPE STRING,
OTYPE_OZ TYPE STRING,
ISTAT_OZ TYPE STRING,
STEXT_ISTAT_OZ TYPE STRING,
BEGDA_OZ TYPE STRING,
ENDDA_OZ TYPE STRING,
SHORT_OZ TYPE STRING,
STEXT_OZ TYPE STRING,
BEGDA_VER TYPE STRING,
ENDDA_VER TYPE STRING,
CONNECT_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/OM_REF_ALV4_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_/ISDFPS/OM_REF_ALV4_STR-ICON_S_ORIGIN sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OBJID sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OTYPE sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ISTAT sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_ISTAT sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-SHORT sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ICON_O_ORIGIN sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OBJID_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OTYPE_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ISTAT_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_ISTAT_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-SHORT_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_OA sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ICON_P_DEST sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OBJID_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OTYPE_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ISTAT_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_ISTAT_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-SHORT_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_PZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ICON_S_DEST sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OBJID_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OTYPE_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ISTAT_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_ISTAT_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-SHORT_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_SZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ICON_O_DEST sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OBJID_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-OTYPE_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ISTAT_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_ISTAT_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-SHORT_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-STEXT_OZ sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-BEGDA_VER sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-ENDDA_VER sy-vline 
WA_/ISDFPS/OM_REF_ALV4_STR-CONNECT_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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