ABAP Select data from SAP table RMMZU 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 RMMZU 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 RMMZU. 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 RMMZU 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_RMMZU TYPE STANDARD TABLE OF RMMZU,
      WA_RMMZU TYPE RMMZU,
      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: <RMMZU> TYPE RMMZU.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMMZU
*  INTO TABLE @DATA(IT_RMMZU2).
*--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_RMMZU INDEX 1 INTO DATA(WA_RMMZU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMMZU>-DOKNR = 1.
<RMMZU>-DOKTL = 1.
<RMMZU>-DOKVR = 1.
<RMMZU>-DKTXT = 1.
<RMMZU>-MDZUO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMMZU-MDZTX, sy-vline,
  WA_RMMZU-DOKAR_DVS, sy-vline,
  WA_RMMZU-REVLV, sy-vline,
  WA_RMMZU-REVEX, sy-vline,
  WA_RMMZU-TCC08CCRVL, sy-vline,
  WA_RMMZU-TAXKM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMMZU 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_RMMZU 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_RMMZU INTO WA_RMMZU.


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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RMMZU-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMMZU-REVLV.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field LTEXT_SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RMMZU-LTEXT_SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMMZU-LTEXT_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_RMMZU_STR, 
DOKNR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
DKTXT TYPE STRING,
MDZUO TYPE STRING,
MDZTX TYPE STRING,
DOKAR_DVS TYPE STRING,
REVLV TYPE STRING,
REVEX TYPE STRING,
TCC08CCRVL TYPE STRING,
TAXKM TYPE STRING,
MEINH TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
VPBME TYPE STRING,
KINIT TYPE STRING,
OKCODE TYPE STRING,
BILDFOLGE TYPE STRING,
HOKCODE TYPE STRING,
FLGDOKMREF TYPE STRING,
FLGQMPREF TYPE STRING,
FLGMKALREF TYPE STRING,
FLGMAEXREF TYPE STRING,
FLGMAPEREF TYPE STRING,
FLGCUOBREF TYPE STRING,
FLGCUOVREF TYPE STRING,
FLGCUOFREF TYPE STRING,
KT_FLAG1 TYPE STRING,
MINIT TYPE STRING,
EINIT TYPE STRING,
PS_FXHOR TYPE STRING,
PS_MINBE TYPE STRING,
PS_DISVFN TYPE STRING,
PS_MEINS TYPE STRING,
CURS_FELD TYPE STRING,
VWINIT TYPE STRING,
PS_MODAW TYPE STRING,
PS_PERIO TYPE STRING,
PS_GEWGR TYPE STRING,
PS_ALPHA TYPE STRING,
PS_BETA1 TYPE STRING,
PS_GAMMA TYPE STRING,
PS_DELTA TYPE STRING,
PS_VPRSV TYPE STRING,
PS_BKLAS TYPE STRING,
PWINIT TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
VMGJA TYPE STRING,
VMMON TYPE STRING,
VJGJA TYPE STRING,
VJMON TYPE STRING,
MEAKT TYPE STRING,
FLG_FLISTE TYPE STRING,
ERR_BME TYPE STRING,
ERR_CHPF TYPE STRING,
ERR_BWTTY TYPE STRING,
MUSSFELD TYPE STRING,
PS_PEINH TYPE STRING,
MG_LANGTEX TYPE STRING,
BILDPROZ TYPE STRING,
REF_QMATV TYPE STRING,
REF_VERKZ TYPE STRING,
XLTYP TYPE STRING,
XVPLB TYPE STRING,
XLTYF TYPE STRING,
AUTO_PRFZ TYPE STRING,
PGINIT TYPE STRING,
CURS_LINE TYPE STRING,
FLGNOTEREF TYPE STRING,
LEINIT TYPE STRING,
LIEFZU TYPE STRING,
LIEFBEZ TYPE STRING,
PREFE_SIT TYPE STRING,
PRENE_SIT TYPE STRING,
KZSTAT_UPD TYPE STRING,
PS_BRGEW TYPE STRING,
PS_QMATV TYPE STRING,
PS_VERKZ TYPE STRING,
FLG_CLINIT TYPE STRING,
WS_CL_UPDA TYPE STRING,
PS_STRGR TYPE STRING,
PS_APOKZ TYPE STRING,
LTEXT_SPRAS TYPE STRING,
PS_DYNTS TYPE STRING,
CLASS_REF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMMZU_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_RMMZU_STR-DOKNR sy-vline 
WA_RMMZU_STR-DOKTL sy-vline 
WA_RMMZU_STR-DOKVR sy-vline 
WA_RMMZU_STR-DKTXT sy-vline 
WA_RMMZU_STR-MDZUO sy-vline 
WA_RMMZU_STR-MDZTX sy-vline 
WA_RMMZU_STR-DOKAR_DVS sy-vline 
WA_RMMZU_STR-REVLV sy-vline 
WA_RMMZU_STR-REVEX sy-vline 
WA_RMMZU_STR-TCC08CCRVL sy-vline 
WA_RMMZU_STR-TAXKM sy-vline 
WA_RMMZU_STR-MEINH sy-vline 
WA_RMMZU_STR-UMREZ sy-vline 
WA_RMMZU_STR-UMREN sy-vline 
WA_RMMZU_STR-VPBME sy-vline 
WA_RMMZU_STR-KINIT sy-vline 
WA_RMMZU_STR-OKCODE sy-vline 
WA_RMMZU_STR-BILDFOLGE sy-vline 
WA_RMMZU_STR-HOKCODE sy-vline 
WA_RMMZU_STR-FLGDOKMREF sy-vline 
WA_RMMZU_STR-FLGQMPREF sy-vline 
WA_RMMZU_STR-FLGMKALREF sy-vline 
WA_RMMZU_STR-FLGMAEXREF sy-vline 
WA_RMMZU_STR-FLGMAPEREF sy-vline 
WA_RMMZU_STR-FLGCUOBREF sy-vline 
WA_RMMZU_STR-FLGCUOVREF sy-vline 
WA_RMMZU_STR-FLGCUOFREF sy-vline 
WA_RMMZU_STR-KT_FLAG1 sy-vline 
WA_RMMZU_STR-MINIT sy-vline 
WA_RMMZU_STR-EINIT sy-vline 
WA_RMMZU_STR-PS_FXHOR sy-vline 
WA_RMMZU_STR-PS_MINBE sy-vline 
WA_RMMZU_STR-PS_DISVFN sy-vline 
WA_RMMZU_STR-PS_MEINS sy-vline 
WA_RMMZU_STR-CURS_FELD sy-vline 
WA_RMMZU_STR-VWINIT sy-vline 
WA_RMMZU_STR-PS_MODAW sy-vline 
WA_RMMZU_STR-PS_PERIO sy-vline 
WA_RMMZU_STR-PS_GEWGR sy-vline 
WA_RMMZU_STR-PS_ALPHA sy-vline 
WA_RMMZU_STR-PS_BETA1 sy-vline 
WA_RMMZU_STR-PS_GAMMA sy-vline 
WA_RMMZU_STR-PS_DELTA sy-vline 
WA_RMMZU_STR-PS_VPRSV sy-vline 
WA_RMMZU_STR-PS_BKLAS sy-vline 
WA_RMMZU_STR-PWINIT sy-vline 
WA_RMMZU_STR-LFGJA sy-vline 
WA_RMMZU_STR-LFMON sy-vline 
WA_RMMZU_STR-VMGJA sy-vline 
WA_RMMZU_STR-VMMON sy-vline 
WA_RMMZU_STR-VJGJA sy-vline 
WA_RMMZU_STR-VJMON sy-vline 
WA_RMMZU_STR-MEAKT sy-vline 
WA_RMMZU_STR-FLG_FLISTE sy-vline 
WA_RMMZU_STR-ERR_BME sy-vline 
WA_RMMZU_STR-ERR_CHPF sy-vline 
WA_RMMZU_STR-ERR_BWTTY sy-vline 
WA_RMMZU_STR-MUSSFELD sy-vline 
WA_RMMZU_STR-PS_PEINH sy-vline 
WA_RMMZU_STR-MG_LANGTEX sy-vline 
WA_RMMZU_STR-BILDPROZ sy-vline 
WA_RMMZU_STR-REF_QMATV sy-vline 
WA_RMMZU_STR-REF_VERKZ sy-vline 
WA_RMMZU_STR-XLTYP sy-vline 
WA_RMMZU_STR-XVPLB sy-vline 
WA_RMMZU_STR-XLTYF sy-vline 
WA_RMMZU_STR-AUTO_PRFZ sy-vline 
WA_RMMZU_STR-PGINIT sy-vline 
WA_RMMZU_STR-CURS_LINE sy-vline 
WA_RMMZU_STR-FLGNOTEREF sy-vline 
WA_RMMZU_STR-LEINIT sy-vline 
WA_RMMZU_STR-LIEFZU sy-vline 
WA_RMMZU_STR-LIEFBEZ sy-vline 
WA_RMMZU_STR-PREFE_SIT sy-vline 
WA_RMMZU_STR-PRENE_SIT sy-vline 
WA_RMMZU_STR-KZSTAT_UPD sy-vline 
WA_RMMZU_STR-PS_BRGEW sy-vline 
WA_RMMZU_STR-PS_QMATV sy-vline 
WA_RMMZU_STR-PS_VERKZ sy-vline 
WA_RMMZU_STR-FLG_CLINIT sy-vline 
WA_RMMZU_STR-WS_CL_UPDA sy-vline 
WA_RMMZU_STR-PS_STRGR sy-vline 
WA_RMMZU_STR-PS_APOKZ sy-vline 
WA_RMMZU_STR-LTEXT_SPRAS sy-vline 
WA_RMMZU_STR-PS_DYNTS sy-vline 
WA_RMMZU_STR-CLASS_REF sy-vline      INTO ld_text SEPARATED BY SPACE.

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