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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/RE_MS_AV
*  INTO TABLE @DATA(IT_/ISDFPS/RE_MS_AV2).
*--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/RE_MS_AV INDEX 1 INTO DATA(WA_/ISDFPS/RE_MS_AV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/RE_MS_AV>-INTRENO = 1.
</ISDFPS/RE_MS_AV>-RECNNR = 1.
</ISDFPS/RE_MS_AV>-RECNTXT = 1.
</ISDFPS/RE_MS_AV>-RECNTYPE = 1.
</ISDFPS/RE_MS_AV>-XSRECNTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/RE_MS_AV-XMRECNTYPE, sy-vline,
  WA_/ISDFPS/RE_MS_AV-OBJECTICON, sy-vline,
  WA_/ISDFPS/RE_MS_AV-OBJECTID, sy-vline,
  WA_/ISDFPS/RE_MS_AV-OBJECTTEXT, sy-vline,
  WA_/ISDFPS/RE_MS_AV-AOID, sy-vline,
  WA_/ISDFPS/RE_MS_AV-PARTAOID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/RE_MS_AV 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/RE_MS_AV 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/RE_MS_AV INTO WA_/ISDFPS/RE_MS_AV.


*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 RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/RE_MS_AV-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/RE_MS_AV-RECNNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/RE_MS_AV-MEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/RE_MS_AV-MEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/RE_MS_AV-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/RE_MS_AV-VALIDTO.
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_/ISDFPS/RE_MS_AV_STR, 
INTRENO TYPE STRING,
RECNNR TYPE STRING,
RECNTXT TYPE STRING,
RECNTYPE TYPE STRING,
XSRECNTYPE TYPE STRING,
XMRECNTYPE TYPE STRING,
OBJECTICON TYPE STRING,
OBJECTID TYPE STRING,
OBJECTTEXT TYPE STRING,
AOID TYPE STRING,
PARTAOID TYPE STRING,
AONR TYPE STRING,
XAO TYPE STRING,
AOTYPE TYPE STRING,
XMAOTYPE TYPE STRING,
AOFUNCTION TYPE STRING,
XMAOFUNCTION TYPE STRING,
XSAOFUNCTION TYPE STRING,
MEAS TYPE STRING,
XSMEAS TYPE STRING,
XMMEAS TYPE STRING,
MEASVALUE TYPE STRING,
MEASVALUECMPL TYPE STRING,
MEASUNIT TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
ISMANUALLYSET TYPE STRING,
ISHIERARCHICAL TYPE STRING,
ISSUMMEAS TYPE STRING,
MEASSUMINFO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/RE_MS_AV_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/RE_MS_AV_STR-INTRENO sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-RECNNR sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-RECNTXT sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-RECNTYPE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XSRECNTYPE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XMRECNTYPE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-OBJECTICON sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-OBJECTID sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-OBJECTTEXT sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-AOID sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-PARTAOID sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-AONR sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XAO sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-AOTYPE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XMAOTYPE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-AOFUNCTION sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XMAOFUNCTION sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XSAOFUNCTION sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-MEAS sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XSMEAS sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-XMMEAS sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-MEASVALUE sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-MEASVALUECMPL sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-MEASUNIT sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-VALIDFROM sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-VALIDTO sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-ISMANUALLYSET sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-ISHIERARCHICAL sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-ISSUMMEAS sy-vline 
WA_/ISDFPS/RE_MS_AV_STR-MEASSUMINFO sy-vline      INTO ld_text SEPARATED BY SPACE.

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