ABAP Select data from SAP table CRMCO_ITEM_STRUCTURE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMCO_ITEM_STRUCTURE
*  INTO TABLE @DATA(IT_CRMCO_ITEM_STRUCTURE2).
*--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_CRMCO_ITEM_STRUCTURE INDEX 1 INTO DATA(WA_CRMCO_ITEM_STRUCTURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMCO_ITEM_STRUCTURE>-RESOURCE = 1.
<CRMCO_ITEM_STRUCTURE>-TYPPS = 1.
<CRMCO_ITEM_STRUCTURE>-KOKRS_HRK = 1.
<CRMCO_ITEM_STRUCTURE>-EXTNR = 1.
<CRMCO_ITEM_STRUCTURE>-KOSTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMCO_ITEM_STRUCTURE-LSTAR, sy-vline,
  WA_CRMCO_ITEM_STRUCTURE-MATNR, sy-vline,
  WA_CRMCO_ITEM_STRUCTURE-WERKS, sy-vline,
  WA_CRMCO_ITEM_STRUCTURE-PSCHL, sy-vline,
  WA_CRMCO_ITEM_STRUCTURE-ASNUM, sy-vline,
  WA_CRMCO_ITEM_STRUCTURE-INFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMCO_ITEM_STRUCTURE 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_CRMCO_ITEM_STRUCTURE 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_CRMCO_ITEM_STRUCTURE INTO WA_CRMCO_ITEM_STRUCTURE.


*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 EXTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMCO_ITEM_STRUCTURE-EXTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMCO_ITEM_STRUCTURE-EXTNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field UNIT_OF_MEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRMCO_ITEM_STRUCTURE-UNIT_OF_MEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMCO_ITEM_STRUCTURE-UNIT_OF_MEASURE.
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_CRMCO_ITEM_STRUCTURE_STR, 
RESOURCE TYPE STRING,
TYPPS TYPE STRING,
KOKRS_HRK TYPE STRING,
EXTNR TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PSCHL TYPE STRING,
ASNUM TYPE STRING,
INFNR TYPE STRING,
EKORG TYPE STRING,
PRZNR TYPE STRING,
BWTAR TYPE STRING,
LIFNR TYPE STRING,
COST_ELEM TYPE STRING,
QUANTITY TYPE STRING,
QUANTITY TYPE STRING,
UNIT_OF_MEASURE TYPE STRING,
CURRENCY TYPE STRING,
PRICE TYPE STRING,
TOTAL TYPE STRING,
FIXED TYPE STRING,
PRICE_UNIT TYPE STRING,
QUANTITY TYPE STRING,
UNIT_OF_MEASURE TYPE STRING,
VALUE TYPE STRING,
TOTAL TYPE STRING,
FIXED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMCO_ITEM_STRUCTURE_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_CRMCO_ITEM_STRUCTURE_STR-RESOURCE sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-TYPPS sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-KOKRS_HRK sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-EXTNR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-KOSTL sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-LSTAR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-MATNR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-WERKS sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-PSCHL sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-ASNUM sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-INFNR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-EKORG sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-PRZNR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-BWTAR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-LIFNR sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-COST_ELEM sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-QUANTITY sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-QUANTITY sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-UNIT_OF_MEASURE sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-CURRENCY sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-PRICE sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-TOTAL sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-FIXED sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-PRICE_UNIT sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-QUANTITY sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-UNIT_OF_MEASURE sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-VALUE sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-TOTAL sy-vline 
WA_CRMCO_ITEM_STRUCTURE_STR-FIXED sy-vline      INTO ld_text SEPARATED BY SPACE.

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