ABAP Select data from SAP table CNMM_SEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMM_SEL
*  INTO TABLE @DATA(IT_CNMM_SEL2).
*--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_CNMM_SEL INDEX 1 INTO DATA(WA_CNMM_SEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMM_SEL>-PROID = 1.
<CNMM_SEL>-VBELN = 1.
<CNMM_SEL>-POSID_LOW = 1.
<CNMM_SEL>-POSID_HIGH = 1.
<CNMM_SEL>-NPLNR_LOW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMM_SEL-NPLNR_HIGH, sy-vline,
  WA_CNMM_SEL-PROFILE, sy-vline,
  WA_CNMM_SEL-DISPO_LOW, sy-vline,
  WA_CNMM_SEL-DISPO_HIGH, sy-vline,
  WA_CNMM_SEL-VORNR_LOW, sy-vline,
  WA_CNMM_SEL-VORNR_HIGH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMM_SEL 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_CNMM_SEL 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_CNMM_SEL INTO WA_CNMM_SEL.


*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 KONPD, internal->external for field PROID
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_CNMM_SEL-PROID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMM_SEL-PROID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field POSID_LOW
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNMM_SEL-POSID_LOW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMM_SEL-POSID_LOW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID_HIGH
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNMM_SEL-POSID_HIGH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMM_SEL-POSID_HIGH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ACT_LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMM_SEL-ACT_LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMM_SEL-ACT_LIFNR.
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_CNMM_SEL_STR, 
PROID TYPE STRING,
VBELN TYPE STRING,
POSID_LOW TYPE STRING,
POSID_HIGH TYPE STRING,
NPLNR_LOW TYPE STRING,
NPLNR_HIGH TYPE STRING,
PROFILE TYPE STRING,
DISPO_LOW TYPE STRING,
DISPO_HIGH TYPE STRING,
VORNR_LOW TYPE STRING,
VORNR_HIGH TYPE STRING,
MATNR_LOW TYPE STRING,
MATNR_HIGH TYPE STRING,
WERKS_LOW TYPE STRING,
WERKS_HIGH TYPE STRING,
SORTF_LOW TYPE STRING,
SORTF_HIGH TYPE STRING,
BDTER_LOW TYPE STRING,
BDTER_HIGH TYPE STRING,
MATKL_LOW TYPE STRING,
MATKL_HIGH TYPE STRING,
EKGRP_LOW TYPE STRING,
EKGRP_HIGH TYPE STRING,
LIFNR TYPE STRING,
POSTP TYPE STRING,
ACT_WERKS_LOW TYPE STRING,
ACT_WERKS_HIGH TYPE STRING,
ACT_ARBPL_LOW TYPE STRING,
ACT_ARBPL_HIGH TYPE STRING,
ACT_SORTF_LOW TYPE STRING,
ACT_SORTF_HIGH TYPE STRING,
ACT_MATKL_LOW TYPE STRING,
ACT_MATKL_HIGH TYPE STRING,
ACT_EKGRP_LOW TYPE STRING,
ACT_EKGRP_HIGH TYPE STRING,
ACT_LIFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMM_SEL_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_CNMM_SEL_STR-PROID sy-vline 
WA_CNMM_SEL_STR-VBELN sy-vline 
WA_CNMM_SEL_STR-POSID_LOW sy-vline 
WA_CNMM_SEL_STR-POSID_HIGH sy-vline 
WA_CNMM_SEL_STR-NPLNR_LOW sy-vline 
WA_CNMM_SEL_STR-NPLNR_HIGH sy-vline 
WA_CNMM_SEL_STR-PROFILE sy-vline 
WA_CNMM_SEL_STR-DISPO_LOW sy-vline 
WA_CNMM_SEL_STR-DISPO_HIGH sy-vline 
WA_CNMM_SEL_STR-VORNR_LOW sy-vline 
WA_CNMM_SEL_STR-VORNR_HIGH sy-vline 
WA_CNMM_SEL_STR-MATNR_LOW sy-vline 
WA_CNMM_SEL_STR-MATNR_HIGH sy-vline 
WA_CNMM_SEL_STR-WERKS_LOW sy-vline 
WA_CNMM_SEL_STR-WERKS_HIGH sy-vline 
WA_CNMM_SEL_STR-SORTF_LOW sy-vline 
WA_CNMM_SEL_STR-SORTF_HIGH sy-vline 
WA_CNMM_SEL_STR-BDTER_LOW sy-vline 
WA_CNMM_SEL_STR-BDTER_HIGH sy-vline 
WA_CNMM_SEL_STR-MATKL_LOW sy-vline 
WA_CNMM_SEL_STR-MATKL_HIGH sy-vline 
WA_CNMM_SEL_STR-EKGRP_LOW sy-vline 
WA_CNMM_SEL_STR-EKGRP_HIGH sy-vline 
WA_CNMM_SEL_STR-LIFNR sy-vline 
WA_CNMM_SEL_STR-POSTP sy-vline 
WA_CNMM_SEL_STR-ACT_WERKS_LOW sy-vline 
WA_CNMM_SEL_STR-ACT_WERKS_HIGH sy-vline 
WA_CNMM_SEL_STR-ACT_ARBPL_LOW sy-vline 
WA_CNMM_SEL_STR-ACT_ARBPL_HIGH sy-vline 
WA_CNMM_SEL_STR-ACT_SORTF_LOW sy-vline 
WA_CNMM_SEL_STR-ACT_SORTF_HIGH sy-vline 
WA_CNMM_SEL_STR-ACT_MATKL_LOW sy-vline 
WA_CNMM_SEL_STR-ACT_MATKL_HIGH sy-vline 
WA_CNMM_SEL_STR-ACT_EKGRP_LOW sy-vline 
WA_CNMM_SEL_STR-ACT_EKGRP_HIGH sy-vline 
WA_CNMM_SEL_STR-ACT_LIFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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