ABAP Select data from SAP table /TDAG/CPS_ICH4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/CPS_ICH4 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 /TDAG/CPS_ICH4. 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 /TDAG/CPS_ICH4 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_/TDAG/CPS_ICH4 TYPE STANDARD TABLE OF /TDAG/CPS_ICH4,
      WA_/TDAG/CPS_ICH4 TYPE /TDAG/CPS_ICH4,
      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: </TDAG/CPS_ICH4> TYPE /TDAG/CPS_ICH4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/TDAG/CPS_ICH4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/CPS_ICH4
  INTO TABLE IT_/TDAG/CPS_ICH4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/CPS_ICH4
*  INTO TABLE @DATA(IT_/TDAG/CPS_ICH42).
*--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_/TDAG/CPS_ICH4 INDEX 1 INTO DATA(WA_/TDAG/CPS_ICH42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/CPS_ICH4 ASSIGNING </TDAG/CPS_ICH4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/CPS_ICH4>-MANDT = 1.
</TDAG/CPS_ICH4>-GUID = 1.
</TDAG/CPS_ICH4>-CRDAT = 1.
</TDAG/CPS_ICH4>-CRNAM = 1.
</TDAG/CPS_ICH4>-CRTSTMP = 1.

ENDLOOP.

LOOP AT IT_/TDAG/CPS_ICH4 INTO WA_/TDAG/CPS_ICH4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/CPS_ICH4-UPDDAT, sy-vline,
  WA_/TDAG/CPS_ICH4-UPDNAM, sy-vline,
  WA_/TDAG/CPS_ICH4-UPDTSTMP, sy-vline,
  WA_/TDAG/CPS_ICH4-DELFLG, sy-vline,
  WA_/TDAG/CPS_ICH4-ROOT_GUID, sy-vline,
  WA_/TDAG/CPS_ICH4-ROOT_TABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/CPS_ICH4 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_/TDAG/CPS_ICH4 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_/TDAG/CPS_ICH4 INTO WA_/TDAG/CPS_ICH4.


*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 RF_DOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ICH4-RF_DOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ICH4-RF_DOCNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SF_DOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ICH4-SF_DOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ICH4-SF_DOCNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REQ_DOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_ICH4-REQ_DOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_ICH4-REQ_DOCNUMBER.
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_/TDAG/CPS_ICH4_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
CRTSTMP TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
UPDTSTMP TYPE STRING,
DELFLG TYPE STRING,
ROOT_GUID TYPE STRING,
ROOT_TABLE TYPE STRING,
COMPANY_ID TYPE STRING,
PART_NO TYPE STRING,
PART_NO_NORM TYPE STRING,
PART_NAME TYPE STRING,
PART_NAME_NORM TYPE STRING,
CHANGE_DATE TYPE STRING,
DRAWING_NO TYPE STRING,
DRAWING_DATED TYPE STRING,
DRAWING_CHG_NO TYPE STRING,
SAMPLE_NO TYPE STRING,
SAMPLE_DATE TYPE STRING,
ORDER_NO TYPE STRING,
DELIVERY_SLIP_NO TYPE STRING,
SUPPLIER_CODE TYPE STRING,
FORWARD_ALLOWED TYPE STRING,
REC_STATUS TYPE STRING,
PREC_REC_STATUS TYPE STRING,
STATUS_CHG TYPE STRING,
STATUS_CHG_TIME TYPE STRING,
RF_DOCTYPE TYPE STRING,
RF_DOCNUMBER TYPE STRING,
RF_DOCPART TYPE STRING,
RF_DOCVERSION TYPE STRING,
SF_DOCTYPE TYPE STRING,
SF_DOCNUMBER TYPE STRING,
SF_DOCPART TYPE STRING,
SF_DOCVERSION TYPE STRING,
TRANS_CHCK_DATE TYPE STRING,
COMM_STATUS TYPE STRING,
SEND_DATE TYPE STRING,
SEND_TIME TYPE STRING,
REQ_ID TYPE STRING,
REQ_MDS_TYPE TYPE STRING,
REQ_PROJ_NAME TYPE STRING,
REQ_DUE_DATE TYPE STRING,
REQ_STATUS TYPE STRING,
PREC_REQ_STATUS TYPE STRING,
REQ_CHANGE_DATE TYPE STRING,
REQ_ASSIGNED_MDS TYPE STRING,
REQ_DOCTYPE TYPE STRING,
REQ_DOCNUMBER TYPE STRING,
REQ_DOCPART TYPE STRING,
REQ_DOCVERSION TYPE STRING,
MODIFIED_FIELDS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/CPS_ICH4_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_/TDAG/CPS_ICH4_STR-MANDT sy-vline 
WA_/TDAG/CPS_ICH4_STR-GUID sy-vline 
WA_/TDAG/CPS_ICH4_STR-CRDAT sy-vline 
WA_/TDAG/CPS_ICH4_STR-CRNAM sy-vline 
WA_/TDAG/CPS_ICH4_STR-CRTSTMP sy-vline 
WA_/TDAG/CPS_ICH4_STR-UPDDAT sy-vline 
WA_/TDAG/CPS_ICH4_STR-UPDNAM sy-vline 
WA_/TDAG/CPS_ICH4_STR-UPDTSTMP sy-vline 
WA_/TDAG/CPS_ICH4_STR-DELFLG sy-vline 
WA_/TDAG/CPS_ICH4_STR-ROOT_GUID sy-vline 
WA_/TDAG/CPS_ICH4_STR-ROOT_TABLE sy-vline 
WA_/TDAG/CPS_ICH4_STR-COMPANY_ID sy-vline 
WA_/TDAG/CPS_ICH4_STR-PART_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-PART_NO_NORM sy-vline 
WA_/TDAG/CPS_ICH4_STR-PART_NAME sy-vline 
WA_/TDAG/CPS_ICH4_STR-PART_NAME_NORM sy-vline 
WA_/TDAG/CPS_ICH4_STR-CHANGE_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-DRAWING_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-DRAWING_DATED sy-vline 
WA_/TDAG/CPS_ICH4_STR-DRAWING_CHG_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-SAMPLE_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-SAMPLE_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-ORDER_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-DELIVERY_SLIP_NO sy-vline 
WA_/TDAG/CPS_ICH4_STR-SUPPLIER_CODE sy-vline 
WA_/TDAG/CPS_ICH4_STR-FORWARD_ALLOWED sy-vline 
WA_/TDAG/CPS_ICH4_STR-REC_STATUS sy-vline 
WA_/TDAG/CPS_ICH4_STR-PREC_REC_STATUS sy-vline 
WA_/TDAG/CPS_ICH4_STR-STATUS_CHG sy-vline 
WA_/TDAG/CPS_ICH4_STR-STATUS_CHG_TIME sy-vline 
WA_/TDAG/CPS_ICH4_STR-RF_DOCTYPE sy-vline 
WA_/TDAG/CPS_ICH4_STR-RF_DOCNUMBER sy-vline 
WA_/TDAG/CPS_ICH4_STR-RF_DOCPART sy-vline 
WA_/TDAG/CPS_ICH4_STR-RF_DOCVERSION sy-vline 
WA_/TDAG/CPS_ICH4_STR-SF_DOCTYPE sy-vline 
WA_/TDAG/CPS_ICH4_STR-SF_DOCNUMBER sy-vline 
WA_/TDAG/CPS_ICH4_STR-SF_DOCPART sy-vline 
WA_/TDAG/CPS_ICH4_STR-SF_DOCVERSION sy-vline 
WA_/TDAG/CPS_ICH4_STR-TRANS_CHCK_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-COMM_STATUS sy-vline 
WA_/TDAG/CPS_ICH4_STR-SEND_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-SEND_TIME sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_ID sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_MDS_TYPE sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_PROJ_NAME sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_DUE_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_STATUS sy-vline 
WA_/TDAG/CPS_ICH4_STR-PREC_REQ_STATUS sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_CHANGE_DATE sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_ASSIGNED_MDS sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_DOCTYPE sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_DOCNUMBER sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_DOCPART sy-vline 
WA_/TDAG/CPS_ICH4_STR-REQ_DOCVERSION sy-vline 
WA_/TDAG/CPS_ICH4_STR-MODIFIED_FIELDS sy-vline      INTO ld_text SEPARATED BY SPACE.

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