ABAP Select data from SAP table CRM_ISX_REVACC_MIG_WRK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRM_ISX_REVACC_MIG_WRK
*  INTO TABLE @DATA(IT_CRM_ISX_REVACC_MIG_WRK2).
*--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_CRM_ISX_REVACC_MIG_WRK INDEX 1 INTO DATA(WA_CRM_ISX_REVACC_MIG_WRK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRM_ISX_REVACC_MIG_WRK>-CLIENT = 1.
<CRM_ISX_REVACC_MIG_WRK>-ITEM_GUID = 1.
<CRM_ISX_REVACC_MIG_WRK>-CONTRACT_ID = 1.
<CRM_ISX_REVACC_MIG_WRK>-CONTRACT_CAT = 1.
<CRM_ISX_REVACC_MIG_WRK>-CONTRACT_ITEM_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRM_ISX_REVACC_MIG_WRK-OBJECT_ID, sy-vline,
  WA_CRM_ISX_REVACC_MIG_WRK-NUMBER_INT, sy-vline,
  WA_CRM_ISX_REVACC_MIG_WRK-HEADER, sy-vline,
  WA_CRM_ISX_REVACC_MIG_WRK-PARENT, sy-vline,
  WA_CRM_ISX_REVACC_MIG_WRK-OBJECT_TYPE, sy-vline,
  WA_CRM_ISX_REVACC_MIG_WRK-SALES_ORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRM_ISX_REVACC_MIG_WRK 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_CRM_ISX_REVACC_MIG_WRK 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_CRM_ISX_REVACC_MIG_WRK INTO WA_CRM_ISX_REVACC_MIG_WRK.


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

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

*Conversion exit TSTPS, internal->external for field TSBEGIN
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CRM_ISX_REVACC_MIG_WRK-TSBEGIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRM_ISX_REVACC_MIG_WRK-TSBEGIN.
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_CRM_ISX_REVACC_MIG_WRK_STR, 
CLIENT TYPE STRING,
ITEM_GUID TYPE STRING,
CONTRACT_ID TYPE STRING,
CONTRACT_CAT TYPE STRING,
CONTRACT_ITEM_ID TYPE STRING,
OBJECT_ID TYPE STRING,
NUMBER_INT TYPE STRING,
HEADER TYPE STRING,
PARENT TYPE STRING,
OBJECT_TYPE TYPE STRING,
SALES_ORG TYPE STRING,
DIS_CHANNEL TYPE STRING,
DIVISION TYPE STRING,
REFID TYPE STRING,
REFTYPE TYPE STRING,
REF_RELEVANCE TYPE STRING,
PRODUCT TYPE STRING,
CHANGE_REASON TYPE STRING,
TRANS_PRICE TYPE STRING,
TP_CURRENCY TYPE STRING,
TP_REC_DURATION TYPE STRING,
TP_REC_UNIT TYPE STRING,
STANDALONE_PRICE TYPE STRING,
SP_CURRENCY TYPE STRING,
SP_REC_DURATION TYPE STRING,
SP_REC_UNIT TYPE STRING,
VALIDTO_RT TYPE STRING,
DLV_RELEVANCE TYPE STRING,
STATUS_FICA TYPE STRING,
STATUS_SD TYPE STRING,
TSBEGIN TYPE STRING,
CCM_VERSION TYPE STRING,
A3SELTYPE TYPE STRING,
PRODUCT_GUID TYPE STRING,
DOCUMENT_PURPOSE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRM_ISX_REVACC_MIG_WRK_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_CRM_ISX_REVACC_MIG_WRK_STR-CLIENT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-ITEM_GUID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-CONTRACT_ID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-CONTRACT_CAT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-CONTRACT_ITEM_ID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-OBJECT_ID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-NUMBER_INT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-HEADER sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-PARENT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-OBJECT_TYPE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-SALES_ORG sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-DIS_CHANNEL sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-DIVISION sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-REFID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-REFTYPE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-REF_RELEVANCE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-PRODUCT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-CHANGE_REASON sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-TRANS_PRICE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-TP_CURRENCY sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-TP_REC_DURATION sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-TP_REC_UNIT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-STANDALONE_PRICE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-SP_CURRENCY sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-SP_REC_DURATION sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-SP_REC_UNIT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-VALIDTO_RT sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-DLV_RELEVANCE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-STATUS_FICA sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-STATUS_SD sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-TSBEGIN sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-CCM_VERSION sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-A3SELTYPE sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-PRODUCT_GUID sy-vline 
WA_CRM_ISX_REVACC_MIG_WRK_STR-DOCUMENT_PURPOSE sy-vline      INTO ld_text SEPARATED BY SPACE.

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