ABAP Select data from SAP table CNMMEKET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMMEKET
*  INTO TABLE @DATA(IT_CNMMEKET2).
*--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_CNMMEKET INDEX 1 INTO DATA(WA_CNMMEKET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMMEKET>-RSNUM = 1.
<CNMMEKET>-RSPOS = 1.
<CNMMEKET>-RSART = 1.
<CNMMEKET>-ICONS = 1.
<CNMMEKET>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMMEKET-MAKTX, sy-vline,
  WA_CNMMEKET-BDMNG, sy-vline,
  WA_CNMMEKET-MEINS, sy-vline,
  WA_CNMMEKET-BDTER, sy-vline,
  WA_CNMMEKET-KWBDTER, sy-vline,
  WA_CNMMEKET-RFQ_EBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMMEKET 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_CNMMEKET 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_CNMMEKET INTO WA_CNMMEKET.


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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS_EKET
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNMMEKET-MEINS_EKET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMEKET-MEINS_EKET.
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_CNMMEKET_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
ICONS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
BDTER TYPE STRING,
KWBDTER TYPE STRING,
RFQ_EBELN TYPE STRING,
RFQ_EBELP TYPE STRING,
STATU TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
XEKET TYPE STRING,
XEKES TYPE STRING,
XEKBE TYPE STRING,
EINDT TYPE STRING,
KWEINDT TYPE STRING,
BEDAT TYPE STRING,
KWBEDAT TYPE STRING,
MENGE TYPE STRING,
MEINS_EKET TYPE STRING,
WEMNG TYPE STRING,
DAT01 TYPE STRING,
KWDAT01 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMMEKET_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_CNMMEKET_STR-RSNUM sy-vline 
WA_CNMMEKET_STR-RSPOS sy-vline 
WA_CNMMEKET_STR-RSART sy-vline 
WA_CNMMEKET_STR-ICONS sy-vline 
WA_CNMMEKET_STR-MATNR sy-vline 
WA_CNMMEKET_STR-MAKTX sy-vline 
WA_CNMMEKET_STR-BDMNG sy-vline 
WA_CNMMEKET_STR-MEINS sy-vline 
WA_CNMMEKET_STR-BDTER sy-vline 
WA_CNMMEKET_STR-KWBDTER sy-vline 
WA_CNMMEKET_STR-RFQ_EBELN sy-vline 
WA_CNMMEKET_STR-RFQ_EBELP sy-vline 
WA_CNMMEKET_STR-STATU sy-vline 
WA_CNMMEKET_STR-EBELN sy-vline 
WA_CNMMEKET_STR-EBELP sy-vline 
WA_CNMMEKET_STR-XEKET sy-vline 
WA_CNMMEKET_STR-XEKES sy-vline 
WA_CNMMEKET_STR-XEKBE sy-vline 
WA_CNMMEKET_STR-EINDT sy-vline 
WA_CNMMEKET_STR-KWEINDT sy-vline 
WA_CNMMEKET_STR-BEDAT sy-vline 
WA_CNMMEKET_STR-KWBEDAT sy-vline 
WA_CNMMEKET_STR-MENGE sy-vline 
WA_CNMMEKET_STR-MEINS_EKET sy-vline 
WA_CNMMEKET_STR-WEMNG sy-vline 
WA_CNMMEKET_STR-DAT01 sy-vline 
WA_CNMMEKET_STR-KWDAT01 sy-vline      INTO ld_text SEPARATED BY SPACE.

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