ABAP Select data from SAP table DERCHZ into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DERCHZ 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 DERCHZ. 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 DERCHZ 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_DERCHZ TYPE STANDARD TABLE OF DERCHZ,
      WA_DERCHZ TYPE DERCHZ,
      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: <DERCHZ> TYPE DERCHZ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DERCHZ
*  INTO TABLE @DATA(IT_DERCHZ2).
*--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_DERCHZ INDEX 1 INTO DATA(WA_DERCHZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DERCHZ>-ABSLKZ = 1.
<DERCHZ>-DIFFKZ = 1.
<DERCHZ>-ZWNUMMER = 1.
<DERCHZ>-NETTOBTR = 1.
<DERCHZ>-TWAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DERCHZ-PREIS, sy-vline,
  WA_DERCHZ-PREISBTR, sy-vline,
  WA_DERCHZ-TARIFTYP, sy-vline,
  WA_DERCHZ-TARIFNR, sy-vline,
  WA_DERCHZ-WDHFAKT, sy-vline,
  WA_DERCHZ-I_ZWSTNDAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DERCHZ 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_DERCHZ 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_DERCHZ INTO WA_DERCHZ.


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

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_DERCHZ-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DERCHZ-GERAET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DERCHZ-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DERCHZ-MASSBILL.
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_DERCHZ_STR, 
ABSLKZ TYPE STRING,
DIFFKZ TYPE STRING,
ZWNUMMER TYPE STRING,
NETTOBTR TYPE STRING,
TWAERS TYPE STRING,
PREIS TYPE STRING,
PREISBTR TYPE STRING,
TARIFTYP TYPE STRING,
TARIFNR TYPE STRING,
WDHFAKT TYPE STRING,
I_ZWSTNDAB TYPE STRING,
I_ZWSTVOR TYPE STRING,
GERAET TYPE STRING,
PRINTREL TYPE STRING,
MASSBILL TYPE STRING,
BELZART TYPE STRING,
AMOUNTDISC TYPE STRING,
QUANTDISC TYPE STRING,
PRICEDISC TYPE STRING,
MAXBELZ TYPE STRING,
BELZINDEX TYPE STRING,
PREISTEXT TYPE STRING,
BELZARTTEXT TYPE STRING,
MASSTEXT TYPE STRING,
PREISTUFTEXT TYPE STRING,
ABLESGRTEXT TYPE STRING,
ABLESGRVTEXT TYPE STRING,
ABLESEARTTEXT TYPE STRING,
ABLARTVATEXT TYPE STRING,
BELARTTEXT TYPE STRING,
TEMPAREATEXT TYPE STRING,
GEWKEYTEXT TYPE STRING,
AKTIVETEXT TYPE STRING,
ZEITTYPTEXT TYPE STRING,
LINSORTTEXT TYPE STRING,
REGRELSORTTEXT TYPE STRING,
BELZEILE TYPE STRING,
UMWAGR_ZFAKT TYPE STRING,
UMWAGR_ZFAKTABR TYPE STRING,
UMWAGR_GASZZAHL TYPE STRING,
UMWAGR_BRENNWERT TYPE STRING,
UMWAGR_UMFAKTOR TYPE STRING,
UMWAGR_WOBBEFAKT TYPE STRING,
UMWAGR_DIMUMRECH TYPE STRING,
RTPINTERFACE TYPE STRING,
CONDIREF TYPE STRING,
RTPTARIFNR TYPE STRING,
TARIFBEZ TYPE STRING,
BASIC_TARIFBEZ TYPE STRING,
ETOUEXCEPTBEZ TYPE STRING,
EXCEPTPRGBEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DERCHZ_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_DERCHZ_STR-ABSLKZ sy-vline 
WA_DERCHZ_STR-DIFFKZ sy-vline 
WA_DERCHZ_STR-ZWNUMMER sy-vline 
WA_DERCHZ_STR-NETTOBTR sy-vline 
WA_DERCHZ_STR-TWAERS sy-vline 
WA_DERCHZ_STR-PREIS sy-vline 
WA_DERCHZ_STR-PREISBTR sy-vline 
WA_DERCHZ_STR-TARIFTYP sy-vline 
WA_DERCHZ_STR-TARIFNR sy-vline 
WA_DERCHZ_STR-WDHFAKT sy-vline 
WA_DERCHZ_STR-I_ZWSTNDAB sy-vline 
WA_DERCHZ_STR-I_ZWSTVOR sy-vline 
WA_DERCHZ_STR-GERAET sy-vline 
WA_DERCHZ_STR-PRINTREL sy-vline 
WA_DERCHZ_STR-MASSBILL sy-vline 
WA_DERCHZ_STR-BELZART sy-vline 
WA_DERCHZ_STR-AMOUNTDISC sy-vline 
WA_DERCHZ_STR-QUANTDISC sy-vline 
WA_DERCHZ_STR-PRICEDISC sy-vline 
WA_DERCHZ_STR-MAXBELZ sy-vline 
WA_DERCHZ_STR-BELZINDEX sy-vline 
WA_DERCHZ_STR-PREISTEXT sy-vline 
WA_DERCHZ_STR-BELZARTTEXT sy-vline 
WA_DERCHZ_STR-MASSTEXT sy-vline 
WA_DERCHZ_STR-PREISTUFTEXT sy-vline 
WA_DERCHZ_STR-ABLESGRTEXT sy-vline 
WA_DERCHZ_STR-ABLESGRVTEXT sy-vline 
WA_DERCHZ_STR-ABLESEARTTEXT sy-vline 
WA_DERCHZ_STR-ABLARTVATEXT sy-vline 
WA_DERCHZ_STR-BELARTTEXT sy-vline 
WA_DERCHZ_STR-TEMPAREATEXT sy-vline 
WA_DERCHZ_STR-GEWKEYTEXT sy-vline 
WA_DERCHZ_STR-AKTIVETEXT sy-vline 
WA_DERCHZ_STR-ZEITTYPTEXT sy-vline 
WA_DERCHZ_STR-LINSORTTEXT sy-vline 
WA_DERCHZ_STR-REGRELSORTTEXT sy-vline 
WA_DERCHZ_STR-BELZEILE sy-vline 
WA_DERCHZ_STR-UMWAGR_ZFAKT sy-vline 
WA_DERCHZ_STR-UMWAGR_ZFAKTABR sy-vline 
WA_DERCHZ_STR-UMWAGR_GASZZAHL sy-vline 
WA_DERCHZ_STR-UMWAGR_BRENNWERT sy-vline 
WA_DERCHZ_STR-UMWAGR_UMFAKTOR sy-vline 
WA_DERCHZ_STR-UMWAGR_WOBBEFAKT sy-vline 
WA_DERCHZ_STR-UMWAGR_DIMUMRECH sy-vline 
WA_DERCHZ_STR-RTPINTERFACE sy-vline 
WA_DERCHZ_STR-CONDIREF sy-vline 
WA_DERCHZ_STR-RTPTARIFNR sy-vline 
WA_DERCHZ_STR-TARIFBEZ sy-vline 
WA_DERCHZ_STR-BASIC_TARIFBEZ sy-vline 
WA_DERCHZ_STR-ETOUEXCEPTBEZ sy-vline 
WA_DERCHZ_STR-EXCEPTPRGBEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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