ABAP Select data from SAP table RN2LABOR02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2LABOR02 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 RN2LABOR02. 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 RN2LABOR02 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_RN2LABOR02 TYPE STANDARD TABLE OF RN2LABOR02,
      WA_RN2LABOR02 TYPE RN2LABOR02,
      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: <RN2LABOR02> TYPE RN2LABOR02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2LABOR02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2LABOR02
  INTO TABLE IT_RN2LABOR02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2LABOR02
*  INTO TABLE @DATA(IT_RN2LABOR022).
*--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_RN2LABOR02 INDEX 1 INTO DATA(WA_RN2LABOR022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2LABOR02 ASSIGNING <RN2LABOR02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2LABOR02>-MANDT = 1.
<RN2LABOR02>-DOKAR = 1.
<RN2LABOR02>-DOKNR = 1.
<RN2LABOR02>-DOKVR = 1.
<RN2LABOR02>-DOKTL = 1.

ENDLOOP.

LOOP AT IT_RN2LABOR02 INTO WA_RN2LABOR02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2LABOR02-N2LAEINRI, sy-vline,
  WA_RN2LABOR02-N2LAPATNR, sy-vline,
  WA_RN2LABOR02-N2LAPATNAM, sy-vline,
  WA_RN2LABOR02-N2LAPATVOR, sy-vline,
  WA_RN2LABOR02-N2LAPATGEB, sy-vline,
  WA_RN2LABOR02-N2LAPATGES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2LABOR02 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_RN2LABOR02 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_RN2LABOR02 INTO WA_RN2LABOR02.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field N2LAEINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-N2LAEINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-N2LAEINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field N2LAPATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-N2LAPATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-N2LAPATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field N2LAFALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-N2LAFALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-N2LAFALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2LABOR02-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2LABOR02-LEIST.
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_RN2LABOR02_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
N2LAEINRI TYPE STRING,
N2LAPATNR TYPE STRING,
N2LAPATNAM TYPE STRING,
N2LAPATVOR TYPE STRING,
N2LAPATGEB TYPE STRING,
N2LAPATGES TYPE STRING,
N2LAFALNR TYPE STRING,
N2LAAUFNUM TYPE STRING,
N2LASYSTEM TYPE STRING,
N2LADATUM TYPE STRING,
N2LASTATUS TYPE STRING,
N2LEISTID TYPE STRING,
N2KATTEXT TYPE STRING,
N2KATID TYPE STRING,
N2LATIME TYPE STRING,
N2PARENT TYPE STRING,
ANFOE TYPE STRING,
ANFID TYPE STRING,
LEIST TYPE STRING,
MARK_ORDER TYPE STRING,
DTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2LABOR02_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_RN2LABOR02_STR-MANDT sy-vline 
WA_RN2LABOR02_STR-DOKAR sy-vline 
WA_RN2LABOR02_STR-DOKNR sy-vline 
WA_RN2LABOR02_STR-DOKVR sy-vline 
WA_RN2LABOR02_STR-DOKTL sy-vline 
WA_RN2LABOR02_STR-N2LAEINRI sy-vline 
WA_RN2LABOR02_STR-N2LAPATNR sy-vline 
WA_RN2LABOR02_STR-N2LAPATNAM sy-vline 
WA_RN2LABOR02_STR-N2LAPATVOR sy-vline 
WA_RN2LABOR02_STR-N2LAPATGEB sy-vline 
WA_RN2LABOR02_STR-N2LAPATGES sy-vline 
WA_RN2LABOR02_STR-N2LAFALNR sy-vline 
WA_RN2LABOR02_STR-N2LAAUFNUM sy-vline 
WA_RN2LABOR02_STR-N2LASYSTEM sy-vline 
WA_RN2LABOR02_STR-N2LADATUM sy-vline 
WA_RN2LABOR02_STR-N2LASTATUS sy-vline 
WA_RN2LABOR02_STR-N2LEISTID sy-vline 
WA_RN2LABOR02_STR-N2KATTEXT sy-vline 
WA_RN2LABOR02_STR-N2KATID sy-vline 
WA_RN2LABOR02_STR-N2LATIME sy-vline 
WA_RN2LABOR02_STR-N2PARENT sy-vline 
WA_RN2LABOR02_STR-ANFOE sy-vline 
WA_RN2LABOR02_STR-ANFID sy-vline 
WA_RN2LABOR02_STR-LEIST sy-vline 
WA_RN2LABOR02_STR-MARK_ORDER sy-vline 
WA_RN2LABOR02_STR-DTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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