ABAP Select data from SAP table RMSAS_HDR_IO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMSAS_HDR_IO
*  INTO TABLE @DATA(IT_RMSAS_HDR_IO2).
*--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_RMSAS_HDR_IO INDEX 1 INTO DATA(WA_RMSAS_HDR_IO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMSAS_HDR_IO>-MARKFLG = 1.
<RMSAS_HDR_IO>-SELEFLG = 1.
<RMSAS_HDR_IO>-LINENO = 1.
<RMSAS_HDR_IO>-LINEMOD = 1.
<RMSAS_HDR_IO>-CHCOFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMSAS_HDR_IO-LOCKMOD, sy-vline,
  WA_RMSAS_HDR_IO-INTRFLG, sy-vline,
  WA_RMSAS_HDR_IO-MANDT, sy-vline,
  WA_RMSAS_HDR_IO-RECN, sy-vline,
  WA_RMSAS_HDR_IO-DELFLG, sy-vline,
  WA_RMSAS_HDR_IO-OBJECTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMSAS_HDR_IO 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_RMSAS_HDR_IO 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_RMSAS_HDR_IO INTO WA_RMSAS_HDR_IO.


*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 OWNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMSAS_HDR_IO-OWNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMSAS_HDR_IO-OWNID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMSAS_HDR_IO-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMSAS_HDR_IO-AENNR.
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_RMSAS_HDR_IO_STR, 
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
DELFLG TYPE STRING,
OBJECTTYPE TYPE STRING,
OBJSUBTYPE TYPE STRING,
OBJECTKEY TYPE STRING,
VRS_TYPE TYPE STRING,
PREFIX TYPE STRING,
NAM TYPE STRING,
VALF TYPE STRING,
VALT TYPE STRING,
FLG_INNR TYPE STRING,
FLG_OBSOLETE TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
PARKFLG TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMSAS_HDR_IO_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_RMSAS_HDR_IO_STR-MARKFLG sy-vline 
WA_RMSAS_HDR_IO_STR-SELEFLG sy-vline 
WA_RMSAS_HDR_IO_STR-LINENO sy-vline 
WA_RMSAS_HDR_IO_STR-LINEMOD sy-vline 
WA_RMSAS_HDR_IO_STR-CHCOFLG sy-vline 
WA_RMSAS_HDR_IO_STR-LOCKMOD sy-vline 
WA_RMSAS_HDR_IO_STR-INTRFLG sy-vline 
WA_RMSAS_HDR_IO_STR-MANDT sy-vline 
WA_RMSAS_HDR_IO_STR-RECN sy-vline 
WA_RMSAS_HDR_IO_STR-DELFLG sy-vline 
WA_RMSAS_HDR_IO_STR-OBJECTTYPE sy-vline 
WA_RMSAS_HDR_IO_STR-OBJSUBTYPE sy-vline 
WA_RMSAS_HDR_IO_STR-OBJECTKEY sy-vline 
WA_RMSAS_HDR_IO_STR-VRS_TYPE sy-vline 
WA_RMSAS_HDR_IO_STR-PREFIX sy-vline 
WA_RMSAS_HDR_IO_STR-NAM sy-vline 
WA_RMSAS_HDR_IO_STR-VALF sy-vline 
WA_RMSAS_HDR_IO_STR-VALT sy-vline 
WA_RMSAS_HDR_IO_STR-FLG_INNR sy-vline 
WA_RMSAS_HDR_IO_STR-FLG_OBSOLETE sy-vline 
WA_RMSAS_HDR_IO_STR-CRDAT sy-vline 
WA_RMSAS_HDR_IO_STR-CRNAM sy-vline 
WA_RMSAS_HDR_IO_STR-UPDDAT sy-vline 
WA_RMSAS_HDR_IO_STR-UPDNAM sy-vline 
WA_RMSAS_HDR_IO_STR-SRSID sy-vline 
WA_RMSAS_HDR_IO_STR-OWNID sy-vline 
WA_RMSAS_HDR_IO_STR-RECNROOT sy-vline 
WA_RMSAS_HDR_IO_STR-PARKFLG sy-vline 
WA_RMSAS_HDR_IO_STR-ACTN sy-vline 
WA_RMSAS_HDR_IO_STR-VALFR sy-vline 
WA_RMSAS_HDR_IO_STR-VALTO sy-vline 
WA_RMSAS_HDR_IO_STR-AENNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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