ABAP Select data from SAP table ICNWACSTC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICNWACSTC1 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 ICNWACSTC1. 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 ICNWACSTC1 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_ICNWACSTC1 TYPE STANDARD TABLE OF ICNWACSTC1,
      WA_ICNWACSTC1 TYPE ICNWACSTC1,
      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: <ICNWACSTC1> TYPE ICNWACSTC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ICNWACSTC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ICNWACSTC1
  INTO TABLE IT_ICNWACSTC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICNWACSTC1
*  INTO TABLE @DATA(IT_ICNWACSTC12).
*--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_ICNWACSTC1 INDEX 1 INTO DATA(WA_ICNWACSTC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ICNWACSTC1 ASSIGNING <ICNWACSTC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICNWACSTC1>-KOKRS = 1.
<ICNWACSTC1>-POSID = 1.
<ICNWACSTC1>-PSPID = 1.
<ICNWACSTC1>-AUFNR = 1.
<ICNWACSTC1>-VORNR = 1.

ENDLOOP.

LOOP AT IT_ICNWACSTC1 INTO WA_ICNWACSTC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICNWACSTC1-KSTAR, sy-vline,
  WA_ICNWACSTC1-VERSN, sy-vline,
  WA_ICNWACSTC1-CURTYPE, sy-vline,
  WA_ICNWACSTC1-FISCPER, sy-vline,
  WA_ICNWACSTC1-FISCVAR, sy-vline,
  WA_ICNWACSTC1-REFBN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICNWACSTC1 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_ICNWACSTC1 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_ICNWACSTC1 INTO WA_ICNWACSTC1.


*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 ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-PSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-FISCPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFBN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-REFBN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-REFBN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REFBT, internal->external for field REFBT
CALL FUNCTION 'CONVERSION_EXIT_REFBT_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-REFBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-REFBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BEKNZ, internal->external for field BEKNZ
CALL FUNCTION 'CONVERSION_EXIT_BEKNZ_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-BEKNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-BEKNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ICNWACSTC1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICNWACSTC1-MATNR.
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_ICNWACSTC1_STR, 
KOKRS TYPE STRING,
POSID TYPE STRING,
PSPID TYPE STRING,
AUFNR TYPE STRING,
VORNR TYPE STRING,
KSTAR TYPE STRING,
VERSN TYPE STRING,
CURTYPE TYPE STRING,
FISCPER TYPE STRING,
FISCVAR TYPE STRING,
REFBN TYPE STRING,
RFPOS TYPE STRING,
LOEKZ TYPE STRING,
MEASTYPE TYPE STRING,
VTDETAIL TYPE STRING,
VTSTAT TYPE STRING,
VTYPE TYPE STRING,
WAERS TYPE STRING,
SWG TYPE STRING,
SMEG TYPE STRING,
MEINH TYPE STRING,
BUDAT TYPE STRING,
LIFNR TYPE STRING,
REFBT TYPE STRING,
RFKNT TYPE STRING,
RFTRM TYPE STRING,
RFART TYPE STRING,
HRKFT TYPE STRING,
VBUND TYPE STRING,
PARGB TYPE STRING,
BEKNZ TYPE STRING,
UNAME TYPE STRING,
BLDAT TYPE STRING,
BUKRS TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
SGTXT TYPE STRING,
DABRZ TYPE STRING,
UPDMOD TYPE STRING,
GUID TYPE STRING,
CPR_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICNWACSTC1_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_ICNWACSTC1_STR-KOKRS sy-vline 
WA_ICNWACSTC1_STR-POSID sy-vline 
WA_ICNWACSTC1_STR-PSPID sy-vline 
WA_ICNWACSTC1_STR-AUFNR sy-vline 
WA_ICNWACSTC1_STR-VORNR sy-vline 
WA_ICNWACSTC1_STR-KSTAR sy-vline 
WA_ICNWACSTC1_STR-VERSN sy-vline 
WA_ICNWACSTC1_STR-CURTYPE sy-vline 
WA_ICNWACSTC1_STR-FISCPER sy-vline 
WA_ICNWACSTC1_STR-FISCVAR sy-vline 
WA_ICNWACSTC1_STR-REFBN sy-vline 
WA_ICNWACSTC1_STR-RFPOS sy-vline 
WA_ICNWACSTC1_STR-LOEKZ sy-vline 
WA_ICNWACSTC1_STR-MEASTYPE sy-vline 
WA_ICNWACSTC1_STR-VTDETAIL sy-vline 
WA_ICNWACSTC1_STR-VTSTAT sy-vline 
WA_ICNWACSTC1_STR-VTYPE sy-vline 
WA_ICNWACSTC1_STR-WAERS sy-vline 
WA_ICNWACSTC1_STR-SWG sy-vline 
WA_ICNWACSTC1_STR-SMEG sy-vline 
WA_ICNWACSTC1_STR-MEINH sy-vline 
WA_ICNWACSTC1_STR-BUDAT sy-vline 
WA_ICNWACSTC1_STR-LIFNR sy-vline 
WA_ICNWACSTC1_STR-REFBT sy-vline 
WA_ICNWACSTC1_STR-RFKNT sy-vline 
WA_ICNWACSTC1_STR-RFTRM sy-vline 
WA_ICNWACSTC1_STR-RFART sy-vline 
WA_ICNWACSTC1_STR-HRKFT sy-vline 
WA_ICNWACSTC1_STR-VBUND sy-vline 
WA_ICNWACSTC1_STR-PARGB sy-vline 
WA_ICNWACSTC1_STR-BEKNZ sy-vline 
WA_ICNWACSTC1_STR-UNAME sy-vline 
WA_ICNWACSTC1_STR-BLDAT sy-vline 
WA_ICNWACSTC1_STR-BUKRS sy-vline 
WA_ICNWACSTC1_STR-MATNR sy-vline 
WA_ICNWACSTC1_STR-MATKL sy-vline 
WA_ICNWACSTC1_STR-SGTXT sy-vline 
WA_ICNWACSTC1_STR-DABRZ sy-vline 
WA_ICNWACSTC1_STR-UPDMOD sy-vline 
WA_ICNWACSTC1_STR-GUID sy-vline 
WA_ICNWACSTC1_STR-CPR_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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