ABAP Select data from SAP table CNMMEKES_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMMEKES_S
*  INTO TABLE @DATA(IT_CNMMEKES_S2).
*--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_CNMMEKES_S INDEX 1 INTO DATA(WA_CNMMEKES_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMMEKES_S>-RSNUM = 1.
<CNMMEKES_S>-RSPOS = 1.
<CNMMEKES_S>-RSART = 1.
<CNMMEKES_S>-PSPNR = 1.
<CNMMEKES_S>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMMEKES_S-POSNR, sy-vline,
  WA_CNMMEKES_S-NPLNR, sy-vline,
  WA_CNMMEKES_S-VORNR, sy-vline,
  WA_CNMMEKES_S-ICONS, sy-vline,
  WA_CNMMEKES_S-MATNR, sy-vline,
  WA_CNMMEKES_S-MAKTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMMEKES_S 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_CNMMEKES_S 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_CNMMEKES_S INTO WA_CNMMEKES_S.


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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMEKES_S-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMEKES_S-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMEKES_S-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMEKES_S-NPLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMEKES_S-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMEKES_S-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS_EKES
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNMMEKES_S-MEINS_EKES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMEKES_S-MEINS_EKES.
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_CNMMEKES_S_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
PSPNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
NPLNR TYPE STRING,
VORNR TYPE STRING,
ICONS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
BDMNG_RESB TYPE STRING,
MEINS_RESB TYPE STRING,
BDTER TYPE STRING,
KWBDTER TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
LFDAT TYPE STRING,
KWLFDAT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
XEKET TYPE STRING,
XEKES TYPE STRING,
XEKBE TYPE STRING,
EBTYP TYPE STRING,
EINDT TYPE STRING,
KWEINDT TYPE STRING,
ERDAT TYPE STRING,
KWERDAT TYPE STRING,
MENGE_EKES TYPE STRING,
MEINS_EKES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMMEKES_S_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_CNMMEKES_S_STR-RSNUM sy-vline 
WA_CNMMEKES_S_STR-RSPOS sy-vline 
WA_CNMMEKES_S_STR-RSART sy-vline 
WA_CNMMEKES_S_STR-PSPNR sy-vline 
WA_CNMMEKES_S_STR-VBELN sy-vline 
WA_CNMMEKES_S_STR-POSNR sy-vline 
WA_CNMMEKES_S_STR-NPLNR sy-vline 
WA_CNMMEKES_S_STR-VORNR sy-vline 
WA_CNMMEKES_S_STR-ICONS sy-vline 
WA_CNMMEKES_S_STR-MATNR sy-vline 
WA_CNMMEKES_S_STR-MAKTX sy-vline 
WA_CNMMEKES_S_STR-BDMNG_RESB sy-vline 
WA_CNMMEKES_S_STR-MEINS_RESB sy-vline 
WA_CNMMEKES_S_STR-BDTER sy-vline 
WA_CNMMEKES_S_STR-KWBDTER sy-vline 
WA_CNMMEKES_S_STR-MENGE sy-vline 
WA_CNMMEKES_S_STR-MEINS sy-vline 
WA_CNMMEKES_S_STR-LFDAT sy-vline 
WA_CNMMEKES_S_STR-KWLFDAT sy-vline 
WA_CNMMEKES_S_STR-EBELN sy-vline 
WA_CNMMEKES_S_STR-EBELP sy-vline 
WA_CNMMEKES_S_STR-XEKET sy-vline 
WA_CNMMEKES_S_STR-XEKES sy-vline 
WA_CNMMEKES_S_STR-XEKBE sy-vline 
WA_CNMMEKES_S_STR-EBTYP sy-vline 
WA_CNMMEKES_S_STR-EINDT sy-vline 
WA_CNMMEKES_S_STR-KWEINDT sy-vline 
WA_CNMMEKES_S_STR-ERDAT sy-vline 
WA_CNMMEKES_S_STR-KWERDAT sy-vline 
WA_CNMMEKES_S_STR-MENGE_EKES sy-vline 
WA_CNMMEKES_S_STR-MEINS_EKES sy-vline      INTO ld_text SEPARATED BY SPACE.

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