ABAP Select data from SAP table PMMO_MDBS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMMO_MDBS
*  INTO TABLE @DATA(IT_PMMO_MDBS2).
*--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_PMMO_MDBS INDEX 1 INTO DATA(WA_PMMO_MDBS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMMO_MDBS>-EBELN = 1.
<PMMO_MDBS>-EBELP = 1.
<PMMO_MDBS>-ETENR = 1.
<PMMO_MDBS>-MATNR = 1.
<PMMO_MDBS>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMMO_MDBS-UMREZ, sy-vline,
  WA_PMMO_MDBS-UMREN, sy-vline,
  WA_PMMO_MDBS-WEMNG, sy-vline,
  WA_PMMO_MDBS-MENGE, sy-vline,
  WA_PMMO_MDBS-ELIKZ, sy-vline,
  WA_PMMO_MDBS-PSPNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMMO_MDBS 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_PMMO_MDBS 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_PMMO_MDBS INTO WA_PMMO_MDBS.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PMMO_MDBS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMMO_MDBS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_PMMO_MDBS-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMMO_MDBS-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field LMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PMMO_MDBS-LMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMMO_MDBS-LMEIN.
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_PMMO_MDBS_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
ETENR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
WEMNG TYPE STRING,
MENGE TYPE STRING,
ELIKZ TYPE STRING,
PSPNR TYPE STRING,
MEINS TYPE STRING,
LMEIN TYPE STRING,
RSNUM TYPE STRING,
GAMNG TYPE STRING,
RESWK TYPE STRING,
WEBAZ TYPE STRING,
PSTYP TYPE STRING,
BSTYP TYPE STRING,
BERID TYPE STRING,
RESLO TYPE STRING,
SERRU TYPE STRING,
DISUB_SOBKZ TYPE STRING,
EINDT TYPE STRING,
GLMNG TYPE STRING,
DABMG TYPE STRING,
WAMNG TYPE STRING,
PLIFZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMMO_MDBS_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_PMMO_MDBS_STR-EBELN sy-vline 
WA_PMMO_MDBS_STR-EBELP sy-vline 
WA_PMMO_MDBS_STR-ETENR sy-vline 
WA_PMMO_MDBS_STR-MATNR sy-vline 
WA_PMMO_MDBS_STR-WERKS sy-vline 
WA_PMMO_MDBS_STR-UMREZ sy-vline 
WA_PMMO_MDBS_STR-UMREN sy-vline 
WA_PMMO_MDBS_STR-WEMNG sy-vline 
WA_PMMO_MDBS_STR-MENGE sy-vline 
WA_PMMO_MDBS_STR-ELIKZ sy-vline 
WA_PMMO_MDBS_STR-PSPNR sy-vline 
WA_PMMO_MDBS_STR-MEINS sy-vline 
WA_PMMO_MDBS_STR-LMEIN sy-vline 
WA_PMMO_MDBS_STR-RSNUM sy-vline 
WA_PMMO_MDBS_STR-GAMNG sy-vline 
WA_PMMO_MDBS_STR-RESWK sy-vline 
WA_PMMO_MDBS_STR-WEBAZ sy-vline 
WA_PMMO_MDBS_STR-PSTYP sy-vline 
WA_PMMO_MDBS_STR-BSTYP sy-vline 
WA_PMMO_MDBS_STR-BERID sy-vline 
WA_PMMO_MDBS_STR-RESLO sy-vline 
WA_PMMO_MDBS_STR-SERRU sy-vline 
WA_PMMO_MDBS_STR-DISUB_SOBKZ sy-vline 
WA_PMMO_MDBS_STR-EINDT sy-vline 
WA_PMMO_MDBS_STR-GLMNG sy-vline 
WA_PMMO_MDBS_STR-DABMG sy-vline 
WA_PMMO_MDBS_STR-WAMNG sy-vline 
WA_PMMO_MDBS_STR-PLIFZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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