ABAP Select data from SAP table RK70XLHEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RK70XLHEAD 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 RK70XLHEAD. 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 RK70XLHEAD 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_RK70XLHEAD TYPE STANDARD TABLE OF RK70XLHEAD,
      WA_RK70XLHEAD TYPE RK70XLHEAD,
      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: <RK70XLHEAD> TYPE RK70XLHEAD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RK70XLHEAD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RK70XLHEAD
  INTO TABLE IT_RK70XLHEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RK70XLHEAD
*  INTO TABLE @DATA(IT_RK70XLHEAD2).
*--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_RK70XLHEAD INDEX 1 INTO DATA(WA_RK70XLHEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RK70XLHEAD ASSIGNING <RK70XLHEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RK70XLHEAD>-MANDT = 1.
<RK70XLHEAD>-LEDNR = 1.
<RK70XLHEAD>-BZOBJ = 1.
<RK70XLHEAD>-KALNR = 1.
<RK70XLHEAD>-KALKA = 1.

ENDLOOP.

LOOP AT IT_RK70XLHEAD INTO WA_RK70XLHEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RK70XLHEAD-KADKY, sy-vline,
  WA_RK70XLHEAD-TVERS, sy-vline,
  WA_RK70XLHEAD-BWVAR, sy-vline,
  WA_RK70XLHEAD-KKZMA, sy-vline,
  WA_RK70XLHEAD-KKART, sy-vline,
  WA_RK70XLHEAD-KKBWVAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RK70XLHEAD 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_RK70XLHEAD 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_RK70XLHEAD INTO WA_RK70XLHEAD.


*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 LEDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-LEDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-LEDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEEHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-MEEHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-MEEHT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field UKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-UKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-UKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field TKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-TKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-TKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RK70XLHEAD-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK70XLHEAD-SPRAS.
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_RK70XLHEAD_STR, 
MANDT TYPE STRING,
LEDNR TYPE STRING,
BZOBJ TYPE STRING,
KALNR TYPE STRING,
KALKA TYPE STRING,
KADKY TYPE STRING,
TVERS TYPE STRING,
BWVAR TYPE STRING,
KKZMA TYPE STRING,
KKART TYPE STRING,
KKBWVAR TYPE STRING,
GJAHR TYPE STRING,
BUKRS TYPE STRING,
KOKRS TYPE STRING,
ERFDT TYPE STRING,
ERFNM TYPE STRING,
AENDT TYPE STRING,
AENNM TYPE STRING,
ABSDT TYPE STRING,
ABSNM TYPE STRING,
PSDAT TYPE STRING,
MENGE TYPE STRING,
MEEHT TYPE STRING,
HWGES TYPE STRING,
HWGFX TYPE STRING,
FWGES TYPE STRING,
HWAER TYPE STRING,
FWAER TYPE STRING,
UKURS TYPE STRING,
KURST TYPE STRING,
TWGES TYPE STRING,
TWAER TYPE STRING,
TKURST TYPE STRING,
TKURS TYPE STRING,
EWKNZ TYPE STRING,
KRSDT TYPE STRING,
TXFLG TYPE STRING,
SPRAS TYPE STRING,
KTEXT TYPE STRING,
LTEXT TYPE STRING,
KALSM TYPE STRING,
ZSCHL TYPE STRING,
OBJNR TYPE STRING,
KKSAPRL TYPE STRING,
PSANZ TYPE STRING,
FILEPATH TYPE STRING,
FILENAME TYPE STRING,
LWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RK70XLHEAD_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_RK70XLHEAD_STR-MANDT sy-vline 
WA_RK70XLHEAD_STR-LEDNR sy-vline 
WA_RK70XLHEAD_STR-BZOBJ sy-vline 
WA_RK70XLHEAD_STR-KALNR sy-vline 
WA_RK70XLHEAD_STR-KALKA sy-vline 
WA_RK70XLHEAD_STR-KADKY sy-vline 
WA_RK70XLHEAD_STR-TVERS sy-vline 
WA_RK70XLHEAD_STR-BWVAR sy-vline 
WA_RK70XLHEAD_STR-KKZMA sy-vline 
WA_RK70XLHEAD_STR-KKART sy-vline 
WA_RK70XLHEAD_STR-KKBWVAR sy-vline 
WA_RK70XLHEAD_STR-GJAHR sy-vline 
WA_RK70XLHEAD_STR-BUKRS sy-vline 
WA_RK70XLHEAD_STR-KOKRS sy-vline 
WA_RK70XLHEAD_STR-ERFDT sy-vline 
WA_RK70XLHEAD_STR-ERFNM sy-vline 
WA_RK70XLHEAD_STR-AENDT sy-vline 
WA_RK70XLHEAD_STR-AENNM sy-vline 
WA_RK70XLHEAD_STR-ABSDT sy-vline 
WA_RK70XLHEAD_STR-ABSNM sy-vline 
WA_RK70XLHEAD_STR-PSDAT sy-vline 
WA_RK70XLHEAD_STR-MENGE sy-vline 
WA_RK70XLHEAD_STR-MEEHT sy-vline 
WA_RK70XLHEAD_STR-HWGES sy-vline 
WA_RK70XLHEAD_STR-HWGFX sy-vline 
WA_RK70XLHEAD_STR-FWGES sy-vline 
WA_RK70XLHEAD_STR-HWAER sy-vline 
WA_RK70XLHEAD_STR-FWAER sy-vline 
WA_RK70XLHEAD_STR-UKURS sy-vline 
WA_RK70XLHEAD_STR-KURST sy-vline 
WA_RK70XLHEAD_STR-TWGES sy-vline 
WA_RK70XLHEAD_STR-TWAER sy-vline 
WA_RK70XLHEAD_STR-TKURST sy-vline 
WA_RK70XLHEAD_STR-TKURS sy-vline 
WA_RK70XLHEAD_STR-EWKNZ sy-vline 
WA_RK70XLHEAD_STR-KRSDT sy-vline 
WA_RK70XLHEAD_STR-TXFLG sy-vline 
WA_RK70XLHEAD_STR-SPRAS sy-vline 
WA_RK70XLHEAD_STR-KTEXT sy-vline 
WA_RK70XLHEAD_STR-LTEXT sy-vline 
WA_RK70XLHEAD_STR-KALSM sy-vline 
WA_RK70XLHEAD_STR-ZSCHL sy-vline 
WA_RK70XLHEAD_STR-OBJNR sy-vline 
WA_RK70XLHEAD_STR-KKSAPRL sy-vline 
WA_RK70XLHEAD_STR-PSANZ sy-vline 
WA_RK70XLHEAD_STR-FILEPATH sy-vline 
WA_RK70XLHEAD_STR-FILENAME sy-vline 
WA_RK70XLHEAD_STR-LWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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