ABAP Select data from SAP table M_PLMMC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_PLMMC
*  INTO TABLE @DATA(IT_M_PLMMC2).
*--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_M_PLMMC INDEX 1 INTO DATA(WA_M_PLMMC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_PLMMC>-MANDT = 1.
<M_PLMMC>-KATAB3 = 1.
<M_PLMMC>-KATALGART3 = 1.
<M_PLMMC>-AUSWMENGE3 = 1.
<M_PLMMC>-AUSWMGWRK3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_PLMMC-AUSWVERS3, sy-vline,
  WA_M_PLMMC-AUSWDAT3, sy-vline,
  WA_M_PLMMC-PLNTY, sy-vline,
  WA_M_PLMMC-PLNNR, sy-vline,
  WA_M_PLMMC-PLNKN, sy-vline,
  WA_M_PLMMC-KZEINSTELL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_PLMMC 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_M_PLMMC 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_M_PLMMC INTO WA_M_PLMMC.


*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 AUSWVERS3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_PLMMC-AUSWVERS3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_PLMMC-AUSWVERS3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_PLMMC-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_PLMMC-PLNNR.
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_M_PLMMC_STR, 
MANDT TYPE STRING,
KATAB3 TYPE STRING,
KATALGART3 TYPE STRING,
AUSWMENGE3 TYPE STRING,
AUSWMGWRK3 TYPE STRING,
AUSWVERS3 TYPE STRING,
AUSWDAT3 TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNKN TYPE STRING,
KZEINSTELL TYPE STRING,
MERKNR TYPE STRING,
ZAEHL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_PLMMC_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_M_PLMMC_STR-MANDT sy-vline 
WA_M_PLMMC_STR-KATAB3 sy-vline 
WA_M_PLMMC_STR-KATALGART3 sy-vline 
WA_M_PLMMC_STR-AUSWMENGE3 sy-vline 
WA_M_PLMMC_STR-AUSWMGWRK3 sy-vline 
WA_M_PLMMC_STR-AUSWVERS3 sy-vline 
WA_M_PLMMC_STR-AUSWDAT3 sy-vline 
WA_M_PLMMC_STR-PLNTY sy-vline 
WA_M_PLMMC_STR-PLNNR sy-vline 
WA_M_PLMMC_STR-PLNKN sy-vline 
WA_M_PLMMC_STR-KZEINSTELL sy-vline 
WA_M_PLMMC_STR-MERKNR sy-vline 
WA_M_PLMMC_STR-ZAEHL sy-vline      INTO ld_text SEPARATED BY SPACE.

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