ABAP Select data from SAP table CRMST_L1_ITEM_COMV_DEF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRMST_L1_ITEM_COMV_DEF 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 CRMST_L1_ITEM_COMV_DEF. 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 CRMST_L1_ITEM_COMV_DEF 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_CRMST_L1_ITEM_COMV_DEF TYPE STANDARD TABLE OF CRMST_L1_ITEM_COMV_DEF,
      WA_CRMST_L1_ITEM_COMV_DEF TYPE CRMST_L1_ITEM_COMV_DEF,
      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: <CRMST_L1_ITEM_COMV_DEF> TYPE CRMST_L1_ITEM_COMV_DEF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRMST_L1_ITEM_COMV_DEF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRMST_L1_ITEM_COMV_DEF
  INTO TABLE IT_CRMST_L1_ITEM_COMV_DEF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMST_L1_ITEM_COMV_DEF
*  INTO TABLE @DATA(IT_CRMST_L1_ITEM_COMV_DEF2).
*--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_CRMST_L1_ITEM_COMV_DEF INDEX 1 INTO DATA(WA_CRMST_L1_ITEM_COMV_DEF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRMST_L1_ITEM_COMV_DEF ASSIGNING <CRMST_L1_ITEM_COMV_DEF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMST_L1_ITEM_COMV_DEF>-SELKZ = 1.
<CRMST_L1_ITEM_COMV_DEF>-POSNR = 1.
<CRMST_L1_ITEM_COMV_DEF>-UEPOS = 1.
<CRMST_L1_ITEM_COMV_DEF>-MABNR = 1.
<CRMST_L1_ITEM_COMV_DEF>-MATNR = 1.

ENDLOOP.

LOOP AT IT_CRMST_L1_ITEM_COMV_DEF INTO WA_CRMST_L1_ITEM_COMV_DEF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMST_L1_ITEM_COMV_DEF-ARKTX, sy-vline,
  WA_CRMST_L1_ITEM_COMV_DEF-PSTYV, sy-vline,
  WA_CRMST_L1_ITEM_COMV_DEF-KDMAT, sy-vline,
  WA_CRMST_L1_ITEM_COMV_DEF-KWMENG, sy-vline,
  WA_CRMST_L1_ITEM_COMV_DEF-VRKME, sy-vline,
  WA_CRMST_L1_ITEM_COMV_DEF-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMST_L1_ITEM_COMV_DEF 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_CRMST_L1_ITEM_COMV_DEF 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_CRMST_L1_ITEM_COMV_DEF INTO WA_CRMST_L1_ITEM_COMV_DEF.


*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 MATN5, internal->external for field MABNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-MABNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-MABNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POSEX
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-POSEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-POSEX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-VOLEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-KMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN5, internal->external for field MATWA
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-MATWA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-MATWA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ZIEME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_L1_ITEM_COMV_DEF-ZIEME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_L1_ITEM_COMV_DEF-ZIEME.
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_CRMST_L1_ITEM_COMV_DEF_STR, 
SELKZ TYPE STRING,
POSNR TYPE STRING,
UEPOS TYPE STRING,
MABNR TYPE STRING,
MATNR TYPE STRING,
ARKTX TYPE STRING,
PSTYV TYPE STRING,
KDMAT TYPE STRING,
KWMENG TYPE STRING,
VRKME TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
VSTEL TYPE STRING,
ROUTE TYPE STRING,
POSEX TYPE STRING,
FAKSP TYPE STRING,
BSTKD TYPE STRING,
BSTDK TYPE STRING,
ETDAT TYPE STRING,
PRGBZ TYPE STRING,
ZTERM TYPE STRING,
PRSDT TYPE STRING,
KURSK TYPE STRING,
FKDAT TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
ABGRU TYPE STRING,
LPRIO TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
SPART TYPE STRING,
WAERK TYPE STRING,
NETWR TYPE STRING,
NETPR TYPE STRING,
KSCHL TYPE STRING,
KOEIN TYPE STRING,
KBETR TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KSTBS TYPE STRING,
MATWA TYPE STRING,
AUFNR TYPE STRING,
PS_PSP_PNR TYPE STRING,
MWSBP TYPE STRING,
ZMENG TYPE STRING,
ZIEME TYPE STRING,
AWAHR TYPE STRING,
FIXMG TYPE STRING,
ZLSCH TYPE STRING,
KZTLF TYPE STRING,
ANTLF TYPE STRING,
GRKOR TYPE STRING,
CHARG TYPE STRING,
DELCO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMST_L1_ITEM_COMV_DEF_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_CRMST_L1_ITEM_COMV_DEF_STR-SELKZ sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-POSNR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-UEPOS sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-MABNR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-MATNR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ARKTX sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-PSTYV sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KDMAT sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KWMENG sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-VRKME sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-WERKS sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-LGORT sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-VSTEL sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ROUTE sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-POSEX sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-FAKSP sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-BSTKD sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-BSTDK sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ETDAT sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-PRGBZ sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ZTERM sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-PRSDT sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KURSK sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-FKDAT sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-INCO1 sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-INCO2 sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ABGRU sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-LPRIO sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-BRGEW sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-NTGEW sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-GEWEI sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-VOLUM sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-VOLEH sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-SPART sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-WAERK sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-NETWR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-NETPR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KSCHL sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KOEIN sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KBETR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KPEIN sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KMEIN sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KSTBS sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-MATWA sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-AUFNR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-PS_PSP_PNR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-MWSBP sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ZMENG sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ZIEME sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-AWAHR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-FIXMG sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ZLSCH sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-KZTLF sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-ANTLF sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-GRKOR sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-CHARG sy-vline 
WA_CRMST_L1_ITEM_COMV_DEF_STR-DELCO sy-vline      INTO ld_text SEPARATED BY SPACE.

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