ABAP Select data from SAP table RN2DWSWL_WORK_DB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2DWSWL_WORK_DB 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 RN2DWSWL_WORK_DB. 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 RN2DWSWL_WORK_DB 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_RN2DWSWL_WORK_DB TYPE STANDARD TABLE OF RN2DWSWL_WORK_DB,
      WA_RN2DWSWL_WORK_DB TYPE RN2DWSWL_WORK_DB,
      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: <RN2DWSWL_WORK_DB> TYPE RN2DWSWL_WORK_DB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2DWSWL_WORK_DB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2DWSWL_WORK_DB
  INTO TABLE IT_RN2DWSWL_WORK_DB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2DWSWL_WORK_DB
*  INTO TABLE @DATA(IT_RN2DWSWL_WORK_DB2).
*--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_RN2DWSWL_WORK_DB INDEX 1 INTO DATA(WA_RN2DWSWL_WORK_DB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2DWSWL_WORK_DB ASSIGNING <RN2DWSWL_WORK_DB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2DWSWL_WORK_DB>-EINRI = 1.
<RN2DWSWL_WORK_DB>-PATNR = 1.
<RN2DWSWL_WORK_DB>-AREA = 1.
<RN2DWSWL_WORK_DB>-WS_ID = 1.
<RN2DWSWL_WORK_DB>-SHORT_CODE = 1.

ENDLOOP.

LOOP AT IT_RN2DWSWL_WORK_DB INTO WA_RN2DWSWL_WORK_DB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2DWSWL_WORK_DB-NAME, sy-vline,
  WA_RN2DWSWL_WORK_DB-WORK_STATE, sy-vline,
  WA_RN2DWSWL_WORK_DB-WORK_STARTED_ON, sy-vline,
  WA_RN2DWSWL_WORK_DB-WORK_STARTED_AT, sy-vline,
  WA_RN2DWSWL_WORK_DB-WORK_STARTED_BY, sy-vline,
  WA_RN2DWSWL_WORK_DB-WORK_CLOSED_ON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2DWSWL_WORK_DB 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_RN2DWSWL_WORK_DB 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_RN2DWSWL_WORK_DB INTO WA_RN2DWSWL_WORK_DB.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DWSWL_WORK_DB-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DWSWL_WORK_DB-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DWSWL_WORK_DB-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DWSWL_WORK_DB-PATNR.
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_RN2DWSWL_WORK_DB_STR, 
EINRI TYPE STRING,
PATNR TYPE STRING,
AREA TYPE STRING,
WS_ID TYPE STRING,
SHORT_CODE TYPE STRING,
NAME TYPE STRING,
WORK_STATE TYPE STRING,
WORK_STARTED_ON TYPE STRING,
WORK_STARTED_AT TYPE STRING,
WORK_STARTED_BY TYPE STRING,
WORK_CLOSED_ON TYPE STRING,
WORK_CLOSED_AT TYPE STRING,
WORK_CLOSED_BY TYPE STRING,
INFO_MODE TYPE STRING,
INFO_ID TYPE STRING,
HAS_NOTE TYPE STRING,
CONTACT_PERSON TYPE STRING,
CONTACT_PHONE TYPE STRING,
CONTACT_EMAIL TYPE STRING,
SEL_VARIANT TYPE STRING,
FUN_VARIANT TYPE STRING,
AUTO_CLOSE TYPE STRING,
WORK_OFFSET TYPE STRING,
ACCESS_OFFSET TYPE STRING,
CLOSE_OFFSET TYPE STRING,
DELETE_AFTER TYPE STRING,
INSDATE TYPE STRING,
INSUSER TYPE STRING,
UPDDATE TYPE STRING,
UPDUSER TYPE STRING,
WORK_PLAN_DATE TYPE STRING,
TASK_CREATED TYPE STRING,
CLIO_CONFIG_ID TYPE STRING,
CHART_CONFIG_ID TYPE STRING,
CLIO_MODE TYPE STRING,
PRODUCED_BY TYPE STRING,
CHART_MODE TYPE STRING,
WORK_HIDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2DWSWL_WORK_DB_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_RN2DWSWL_WORK_DB_STR-EINRI sy-vline 
WA_RN2DWSWL_WORK_DB_STR-PATNR sy-vline 
WA_RN2DWSWL_WORK_DB_STR-AREA sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WS_ID sy-vline 
WA_RN2DWSWL_WORK_DB_STR-SHORT_CODE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-NAME sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_STATE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_STARTED_ON sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_STARTED_AT sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_STARTED_BY sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_CLOSED_ON sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_CLOSED_AT sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_CLOSED_BY sy-vline 
WA_RN2DWSWL_WORK_DB_STR-INFO_MODE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-INFO_ID sy-vline 
WA_RN2DWSWL_WORK_DB_STR-HAS_NOTE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CONTACT_PERSON sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CONTACT_PHONE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CONTACT_EMAIL sy-vline 
WA_RN2DWSWL_WORK_DB_STR-SEL_VARIANT sy-vline 
WA_RN2DWSWL_WORK_DB_STR-FUN_VARIANT sy-vline 
WA_RN2DWSWL_WORK_DB_STR-AUTO_CLOSE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_OFFSET sy-vline 
WA_RN2DWSWL_WORK_DB_STR-ACCESS_OFFSET sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CLOSE_OFFSET sy-vline 
WA_RN2DWSWL_WORK_DB_STR-DELETE_AFTER sy-vline 
WA_RN2DWSWL_WORK_DB_STR-INSDATE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-INSUSER sy-vline 
WA_RN2DWSWL_WORK_DB_STR-UPDDATE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-UPDUSER sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_PLAN_DATE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-TASK_CREATED sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CLIO_CONFIG_ID sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CHART_CONFIG_ID sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CLIO_MODE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-PRODUCED_BY sy-vline 
WA_RN2DWSWL_WORK_DB_STR-CHART_MODE sy-vline 
WA_RN2DWSWL_WORK_DB_STR-WORK_HIDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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