ABAP Select data from SAP table CNMMDOCS1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNMMDOCS1 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 CNMMDOCS1. 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 CNMMDOCS1 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_CNMMDOCS1 TYPE STANDARD TABLE OF CNMMDOCS1,
      WA_CNMMDOCS1 TYPE CNMMDOCS1,
      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: <CNMMDOCS1> TYPE CNMMDOCS1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNMMDOCS1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNMMDOCS1
  INTO TABLE IT_CNMMDOCS1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMMDOCS1
*  INTO TABLE @DATA(IT_CNMMDOCS12).
*--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_CNMMDOCS1 INDEX 1 INTO DATA(WA_CNMMDOCS12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNMMDOCS1 ASSIGNING <CNMMDOCS1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMMDOCS1>-PSPNR = 1.
<CNMMDOCS1>-VBELN = 1.
<CNMMDOCS1>-POSNR = 1.
<CNMMDOCS1>-NPLNR = 1.
<CNMMDOCS1>-VORNR = 1.

ENDLOOP.

LOOP AT IT_CNMMDOCS1 INTO WA_CNMMDOCS1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMMDOCS1-MATNR, sy-vline,
  WA_CNMMDOCS1-WERKS, sy-vline,
  WA_CNMMDOCS1-MAKTX, sy-vline,
  WA_CNMMDOCS1-BANFN, sy-vline,
  WA_CNMMDOCS1-BNFPO, sy-vline,
  WA_CNMMDOCS1-RFQ_EBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMMDOCS1 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_CNMMDOCS1 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_CNMMDOCS1 INTO WA_CNMMDOCS1.


*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_CNMMDOCS1-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-NPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BANFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-BANFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-BANFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFQ_EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-RFQ_EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-RFQ_EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-PLNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN_VL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-VBELN_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-VBELN_VL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CNMMDOCS1-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMDOCS1-MJAHR.
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_CNMMDOCS1_STR, 
PSPNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
NPLNR TYPE STRING,
VORNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
MAKTX TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
RFQ_EBELN TYPE STRING,
RFQ_EBELP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
XEKET TYPE STRING,
XEKES TYPE STRING,
XEKBE TYPE STRING,
AUFNR TYPE STRING,
PLNUM TYPE STRING,
VBELN_VL TYPE STRING,
D_POSNR TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMMDOCS1_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_CNMMDOCS1_STR-PSPNR sy-vline 
WA_CNMMDOCS1_STR-VBELN sy-vline 
WA_CNMMDOCS1_STR-POSNR sy-vline 
WA_CNMMDOCS1_STR-NPLNR sy-vline 
WA_CNMMDOCS1_STR-VORNR sy-vline 
WA_CNMMDOCS1_STR-MATNR sy-vline 
WA_CNMMDOCS1_STR-WERKS sy-vline 
WA_CNMMDOCS1_STR-MAKTX sy-vline 
WA_CNMMDOCS1_STR-BANFN sy-vline 
WA_CNMMDOCS1_STR-BNFPO sy-vline 
WA_CNMMDOCS1_STR-RFQ_EBELN sy-vline 
WA_CNMMDOCS1_STR-RFQ_EBELP sy-vline 
WA_CNMMDOCS1_STR-EBELN sy-vline 
WA_CNMMDOCS1_STR-EBELP sy-vline 
WA_CNMMDOCS1_STR-XEKET sy-vline 
WA_CNMMDOCS1_STR-XEKES sy-vline 
WA_CNMMDOCS1_STR-XEKBE sy-vline 
WA_CNMMDOCS1_STR-AUFNR sy-vline 
WA_CNMMDOCS1_STR-PLNUM sy-vline 
WA_CNMMDOCS1_STR-VBELN_VL sy-vline 
WA_CNMMDOCS1_STR-D_POSNR sy-vline 
WA_CNMMDOCS1_STR-MBLNR sy-vline 
WA_CNMMDOCS1_STR-MJAHR sy-vline 
WA_CNMMDOCS1_STR-ZEILE sy-vline      INTO ld_text SEPARATED BY SPACE.

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