ABAP Select data from SAP table CMRWFITEMDETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMRWFITEMDETAIL
*  INTO TABLE @DATA(IT_CMRWFITEMDETAIL2).
*--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_CMRWFITEMDETAIL INDEX 1 INTO DATA(WA_CMRWFITEMDETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMRWFITEMDETAIL>-MANDT = 1.
<CMRWFITEMDETAIL>-CREDITMEMOREQUEST = 1.
<CMRWFITEMDETAIL>-CREDITMEMOREQUESTITEM = 1.
<CMRWFITEMDETAIL>-MATERIAL = 1.
<CMRWFITEMDETAIL>-MATERIALNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMRWFITEMDETAIL-TARGETQUANTITY, sy-vline,
  WA_CMRWFITEMDETAIL-TARGETQUANTITYUNIT, sy-vline,
  WA_CMRWFITEMDETAIL-NETAMOUNT, sy-vline,
  WA_CMRWFITEMDETAIL-TRANSACTIONCURRENCY, sy-vline,
  WA_CMRWFITEMDETAIL-MATERIALGROUP, sy-vline,
  WA_CMRWFITEMDETAIL-CREDITMEMOREQUESTITEMCATEGORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMRWFITEMDETAIL 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_CMRWFITEMDETAIL 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_CMRWFITEMDETAIL INTO WA_CMRWFITEMDETAIL.


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

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

*Conversion exit CUNIT, internal->external for field TARGETQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMRWFITEMDETAIL-TARGETQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMRWFITEMDETAIL-TARGETQUANTITYUNIT.
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_CMRWFITEMDETAIL_STR, 
MANDT TYPE STRING,
CREDITMEMOREQUEST TYPE STRING,
CREDITMEMOREQUESTITEM TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
TARGETQUANTITY TYPE STRING,
TARGETQUANTITYUNIT TYPE STRING,
NETAMOUNT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
MATERIALGROUP TYPE STRING,
CREDITMEMOREQUESTITEMCATEGORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMRWFITEMDETAIL_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_CMRWFITEMDETAIL_STR-MANDT sy-vline 
WA_CMRWFITEMDETAIL_STR-CREDITMEMOREQUEST sy-vline 
WA_CMRWFITEMDETAIL_STR-CREDITMEMOREQUESTITEM sy-vline 
WA_CMRWFITEMDETAIL_STR-MATERIAL sy-vline 
WA_CMRWFITEMDETAIL_STR-MATERIALNAME sy-vline 
WA_CMRWFITEMDETAIL_STR-TARGETQUANTITY sy-vline 
WA_CMRWFITEMDETAIL_STR-TARGETQUANTITYUNIT sy-vline 
WA_CMRWFITEMDETAIL_STR-NETAMOUNT sy-vline 
WA_CMRWFITEMDETAIL_STR-TRANSACTIONCURRENCY sy-vline 
WA_CMRWFITEMDETAIL_STR-MATERIALGROUP sy-vline 
WA_CMRWFITEMDETAIL_STR-CREDITMEMOREQUESTITEMCATEGORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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