ABAP Select data from SAP table /ISHFR/RNWFRRSS_SCR_HEA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISHFR/RNWFRRSS_SCR_HEA
*  INTO TABLE @DATA(IT_/ISHFR/RNWFRRSS_SCR_HEA2).
*--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_/ISHFR/RNWFRRSS_SCR_HEA INDEX 1 INTO DATA(WA_/ISHFR/RNWFRRSS_SCR_HEA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISHFR/RNWFRRSS_SCR_HEA>-RSSNR20 = 1.
</ISHFR/RNWFRRSS_SCR_HEA>-EINRI = 1.
</ISHFR/RNWFRRSS_SCR_HEA>-ORGUNIT = 1.
</ISHFR/RNWFRRSS_SCR_HEA>-ORGID = 1.
</ISHFR/RNWFRRSS_SCR_HEA>-ORGNA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISHFR/RNWFRRSS_SCR_HEA-ORGKB, sy-vline,
  WA_/ISHFR/RNWFRRSS_SCR_HEA-ORGTYPE, sy-vline,
  WA_/ISHFR/RNWFRRSS_SCR_HEA-BEDTYPE, sy-vline,
  WA_/ISHFR/RNWFRRSS_SCR_HEA-ADMDATE, sy-vline,
  WA_/ISHFR/RNWFRRSS_SCR_HEA-ADMTYPE, sy-vline,
  WA_/ISHFR/RNWFRRSS_SCR_HEA-ORIGIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISHFR/RNWFRRSS_SCR_HEA 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_/ISHFR/RNWFRRSS_SCR_HEA 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_/ISHFR/RNWFRRSS_SCR_HEA INTO WA_/ISHFR/RNWFRRSS_SCR_HEA.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISHFR/RNWFRRSS_SCR_HEA-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISHFR/RNWFRRSS_SCR_HEA-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field GWEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ISHFR/RNWFRRSS_SCR_HEA-GWEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISHFR/RNWFRRSS_SCR_HEA-GWEIN.
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_/ISHFR/RNWFRRSS_SCR_HEA_STR, 
RSSNR20 TYPE STRING,
EINRI TYPE STRING,
ORGUNIT TYPE STRING,
ORGID TYPE STRING,
ORGNA TYPE STRING,
ORGKB TYPE STRING,
ORGTYPE TYPE STRING,
BEDTYPE TYPE STRING,
ADMDATE TYPE STRING,
ADMTYPE TYPE STRING,
ORIGIN TYPE STRING,
DISDATE TYPE STRING,
DISTYPE TYPE STRING,
DEST TYPE STRING,
SEVCODE TYPE STRING,
WEIGHT TYPE STRING,
GWEIN TYPE STRING,
GESTAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISHFR/RNWFRRSS_SCR_HEA_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_/ISHFR/RNWFRRSS_SCR_HEA_STR-RSSNR20 sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-EINRI sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORGUNIT sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORGID sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORGNA sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORGKB sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORGTYPE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-BEDTYPE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ADMDATE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ADMTYPE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-ORIGIN sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-DISDATE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-DISTYPE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-DEST sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-SEVCODE sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-WEIGHT sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-GWEIN sy-vline 
WA_/ISHFR/RNWFRRSS_SCR_HEA_STR-GESTAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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