ABAP Select data from SAP table MMHIPO_MAINLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMHIPO_MAINLIST
*  INTO TABLE @DATA(IT_MMHIPO_MAINLIST2).
*--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_MMHIPO_MAINLIST INDEX 1 INTO DATA(WA_MMHIPO_MAINLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMHIPO_MAINLIST>-VGABETEXT = 1.
<MMHIPO_MAINLIST>-BEWTK = 1.
<MMHIPO_MAINLIST>-BWART = 1.
<MMHIPO_MAINLIST>-BELNR = 1.
<MMHIPO_MAINLIST>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMHIPO_MAINLIST-BUDAT, sy-vline,
  WA_MMHIPO_MAINLIST-MENGE, sy-vline,
  WA_MMHIPO_MAINLIST-MENGE_BZ, sy-vline,
  WA_MMHIPO_MAINLIST-MEINS, sy-vline,
  WA_MMHIPO_MAINLIST-DMBTR, sy-vline,
  WA_MMHIPO_MAINLIST-RETAMT_LC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMHIPO_MAINLIST 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_MMHIPO_MAINLIST 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_MMHIPO_MAINLIST INTO WA_MMHIPO_MAINLIST.


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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMHIPO_MAINLIST-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMHIPO_MAINLIST-LOGSY.
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_MMHIPO_MAINLIST_STR, 
VGABETEXT TYPE STRING,
BEWTK TYPE STRING,
BWART TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
MENGE_BZ TYPE STRING,
MEINS TYPE STRING,
DMBTR TYPE STRING,
RETAMT_LC TYPE STRING,
RETAMTP_LC TYPE STRING,
HSWAE TYPE STRING,
VGABE TYPE STRING,
BPMNG TYPE STRING,
BPMNG_BZ TYPE STRING,
BPRME TYPE STRING,
WRBTR TYPE STRING,
RETAMT_FC TYPE STRING,
RETAMTP_FC TYPE STRING,
WAERS TYPE STRING,
WESBS TYPE STRING,
BPWES TYPE STRING,
AREWR TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
GJAHR TYPE STRING,
BUKRS TYPE STRING,
BSTYP TYPE STRING,
BEWTP TYPE STRING,
EKBZKZ TYPE STRING,
XBLNR TYPE STRING,
WESBB TYPE STRING,
BPWEB TYPE STRING,
WEORA TYPE STRING,
MENGE_POP TYPE STRING,
BPMNG_POP TYPE STRING,
DMBTR_POP TYPE STRING,
WRBTR_POP TYPE STRING,
AREWR_POP TYPE STRING,
CHARG TYPE STRING,
BWTAR TYPE STRING,
SGT_SCAT TYPE STRING,
LOGSY TYPE STRING,
/CWM/BAMNG TYPE STRING,
/CWM/WESBS TYPE STRING,
/CWM/WESBB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMHIPO_MAINLIST_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_MMHIPO_MAINLIST_STR-VGABETEXT sy-vline 
WA_MMHIPO_MAINLIST_STR-BEWTK sy-vline 
WA_MMHIPO_MAINLIST_STR-BWART sy-vline 
WA_MMHIPO_MAINLIST_STR-BELNR sy-vline 
WA_MMHIPO_MAINLIST_STR-BUZEI sy-vline 
WA_MMHIPO_MAINLIST_STR-BUDAT sy-vline 
WA_MMHIPO_MAINLIST_STR-MENGE sy-vline 
WA_MMHIPO_MAINLIST_STR-MENGE_BZ sy-vline 
WA_MMHIPO_MAINLIST_STR-MEINS sy-vline 
WA_MMHIPO_MAINLIST_STR-DMBTR sy-vline 
WA_MMHIPO_MAINLIST_STR-RETAMT_LC sy-vline 
WA_MMHIPO_MAINLIST_STR-RETAMTP_LC sy-vline 
WA_MMHIPO_MAINLIST_STR-HSWAE sy-vline 
WA_MMHIPO_MAINLIST_STR-VGABE sy-vline 
WA_MMHIPO_MAINLIST_STR-BPMNG sy-vline 
WA_MMHIPO_MAINLIST_STR-BPMNG_BZ sy-vline 
WA_MMHIPO_MAINLIST_STR-BPRME sy-vline 
WA_MMHIPO_MAINLIST_STR-WRBTR sy-vline 
WA_MMHIPO_MAINLIST_STR-RETAMT_FC sy-vline 
WA_MMHIPO_MAINLIST_STR-RETAMTP_FC sy-vline 
WA_MMHIPO_MAINLIST_STR-WAERS sy-vline 
WA_MMHIPO_MAINLIST_STR-WESBS sy-vline 
WA_MMHIPO_MAINLIST_STR-BPWES sy-vline 
WA_MMHIPO_MAINLIST_STR-AREWR sy-vline 
WA_MMHIPO_MAINLIST_STR-CPUDT sy-vline 
WA_MMHIPO_MAINLIST_STR-CPUTM sy-vline 
WA_MMHIPO_MAINLIST_STR-GJAHR sy-vline 
WA_MMHIPO_MAINLIST_STR-BUKRS sy-vline 
WA_MMHIPO_MAINLIST_STR-BSTYP sy-vline 
WA_MMHIPO_MAINLIST_STR-BEWTP sy-vline 
WA_MMHIPO_MAINLIST_STR-EKBZKZ sy-vline 
WA_MMHIPO_MAINLIST_STR-XBLNR sy-vline 
WA_MMHIPO_MAINLIST_STR-WESBB sy-vline 
WA_MMHIPO_MAINLIST_STR-BPWEB sy-vline 
WA_MMHIPO_MAINLIST_STR-WEORA sy-vline 
WA_MMHIPO_MAINLIST_STR-MENGE_POP sy-vline 
WA_MMHIPO_MAINLIST_STR-BPMNG_POP sy-vline 
WA_MMHIPO_MAINLIST_STR-DMBTR_POP sy-vline 
WA_MMHIPO_MAINLIST_STR-WRBTR_POP sy-vline 
WA_MMHIPO_MAINLIST_STR-AREWR_POP sy-vline 
WA_MMHIPO_MAINLIST_STR-CHARG sy-vline 
WA_MMHIPO_MAINLIST_STR-BWTAR sy-vline 
WA_MMHIPO_MAINLIST_STR-SGT_SCAT sy-vline 
WA_MMHIPO_MAINLIST_STR-LOGSY sy-vline 
WA_MMHIPO_MAINLIST_STR-/CWM/BAMNG sy-vline 
WA_MMHIPO_MAINLIST_STR-/CWM/WESBS sy-vline 
WA_MMHIPO_MAINLIST_STR-/CWM/WESBB sy-vline      INTO ld_text SEPARATED BY SPACE.

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