ABAP Select data from SAP table LFM2_PRC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LFM2_PRC 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 LFM2_PRC. 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 LFM2_PRC 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_LFM2_PRC TYPE STANDARD TABLE OF LFM2_PRC,
      WA_LFM2_PRC TYPE LFM2_PRC,
      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: <LFM2_PRC> TYPE LFM2_PRC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LFM2_PRC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LFM2_PRC
  INTO TABLE IT_LFM2_PRC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFM2_PRC
*  INTO TABLE @DATA(IT_LFM2_PRC2).
*--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_LFM2_PRC INDEX 1 INTO DATA(WA_LFM2_PRC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LFM2_PRC ASSIGNING <LFM2_PRC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFM2_PRC>-MANDT = 1.
<LFM2_PRC>-PROCESS_ID = 1.
<LFM2_PRC>-PROCESS_STEP_NO = 1.
<LFM2_PRC>-SOURCE_SYSTEM = 1.
<LFM2_PRC>-SOURCE_ID = 1.

ENDLOOP.

LOOP AT IT_LFM2_PRC INTO WA_LFM2_PRC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFM2_PRC-EKORG, sy-vline,
  WA_LFM2_PRC-LTSNR, sy-vline,
  WA_LFM2_PRC-WERKS, sy-vline,
  WA_LFM2_PRC-ASSIGNMENT_ID, sy-vline,
  WA_LFM2_PRC-ERDAT, sy-vline,
  WA_LFM2_PRC-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFM2_PRC 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_LFM2_PRC 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_LFM2_PRC INTO WA_LFM2_PRC.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFM2_PRC-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFM2_PRC-LIFNR.
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_LFM2_PRC_STR, 
MANDT TYPE STRING,
PROCESS_ID TYPE STRING,
PROCESS_STEP_NO TYPE STRING,
SOURCE_SYSTEM TYPE STRING,
SOURCE_ID TYPE STRING,
EKORG TYPE STRING,
LTSNR TYPE STRING,
WERKS TYPE STRING,
ASSIGNMENT_ID TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
SPERM TYPE STRING,
LOEVM TYPE STRING,
LFABC TYPE STRING,
WAERS TYPE STRING,
VERKF TYPE STRING,
TELF1 TYPE STRING,
MINBW TYPE STRING,
ZTERM TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
WEBRE TYPE STRING,
KZABS TYPE STRING,
KALSK TYPE STRING,
KZAUT TYPE STRING,
EXPVZ TYPE STRING,
ZOLLA TYPE STRING,
MEPRF TYPE STRING,
EKGRP TYPE STRING,
XERSY TYPE STRING,
PLIFZ TYPE STRING,
MRPPP TYPE STRING,
LFRHY TYPE STRING,
LIBES TYPE STRING,
LIPRE TYPE STRING,
LISER TYPE STRING,
INCOV TYPE STRING,
INCO2_L TYPE STRING,
INCO3_L TYPE STRING,
WEORA TYPE STRING,
DISPO TYPE STRING,
BOIND TYPE STRING,
BSTAE TYPE STRING,
RDPRF TYPE STRING,
MEGRU TYPE STRING,
BOPNR TYPE STRING,
XERSR TYPE STRING,
ABUEB TYPE STRING,
PAPRF TYPE STRING,
XNBWY TYPE STRING,
LEBRE TYPE STRING,
BOLRE TYPE STRING,
UMSAE TYPE STRING,
SOURCE_RECENCY TYPE STRING,
SOURCE_MODIFIED TYPE STRING,
SOURCE_MODIFICATION_BLIP TYPE STRING,
SOURCE_INDEX TYPE STRING,
LIFNR TYPE STRING,
TARGET_ASSIGNMENT_ID TYPE STRING,
UPPRS TYPE STRING,
TRANSPORT_CHAIN TYPE STRING,
STAGING_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFM2_PRC_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_LFM2_PRC_STR-MANDT sy-vline 
WA_LFM2_PRC_STR-PROCESS_ID sy-vline 
WA_LFM2_PRC_STR-PROCESS_STEP_NO sy-vline 
WA_LFM2_PRC_STR-SOURCE_SYSTEM sy-vline 
WA_LFM2_PRC_STR-SOURCE_ID sy-vline 
WA_LFM2_PRC_STR-EKORG sy-vline 
WA_LFM2_PRC_STR-LTSNR sy-vline 
WA_LFM2_PRC_STR-WERKS sy-vline 
WA_LFM2_PRC_STR-ASSIGNMENT_ID sy-vline 
WA_LFM2_PRC_STR-ERDAT sy-vline 
WA_LFM2_PRC_STR-ERNAM sy-vline 
WA_LFM2_PRC_STR-SPERM sy-vline 
WA_LFM2_PRC_STR-LOEVM sy-vline 
WA_LFM2_PRC_STR-LFABC sy-vline 
WA_LFM2_PRC_STR-WAERS sy-vline 
WA_LFM2_PRC_STR-VERKF sy-vline 
WA_LFM2_PRC_STR-TELF1 sy-vline 
WA_LFM2_PRC_STR-MINBW sy-vline 
WA_LFM2_PRC_STR-ZTERM sy-vline 
WA_LFM2_PRC_STR-INCO1 sy-vline 
WA_LFM2_PRC_STR-INCO2 sy-vline 
WA_LFM2_PRC_STR-WEBRE sy-vline 
WA_LFM2_PRC_STR-KZABS sy-vline 
WA_LFM2_PRC_STR-KALSK sy-vline 
WA_LFM2_PRC_STR-KZAUT sy-vline 
WA_LFM2_PRC_STR-EXPVZ sy-vline 
WA_LFM2_PRC_STR-ZOLLA sy-vline 
WA_LFM2_PRC_STR-MEPRF sy-vline 
WA_LFM2_PRC_STR-EKGRP sy-vline 
WA_LFM2_PRC_STR-XERSY sy-vline 
WA_LFM2_PRC_STR-PLIFZ sy-vline 
WA_LFM2_PRC_STR-MRPPP sy-vline 
WA_LFM2_PRC_STR-LFRHY sy-vline 
WA_LFM2_PRC_STR-LIBES sy-vline 
WA_LFM2_PRC_STR-LIPRE sy-vline 
WA_LFM2_PRC_STR-LISER sy-vline 
WA_LFM2_PRC_STR-INCOV sy-vline 
WA_LFM2_PRC_STR-INCO2_L sy-vline 
WA_LFM2_PRC_STR-INCO3_L sy-vline 
WA_LFM2_PRC_STR-WEORA sy-vline 
WA_LFM2_PRC_STR-DISPO sy-vline 
WA_LFM2_PRC_STR-BOIND sy-vline 
WA_LFM2_PRC_STR-BSTAE sy-vline 
WA_LFM2_PRC_STR-RDPRF sy-vline 
WA_LFM2_PRC_STR-MEGRU sy-vline 
WA_LFM2_PRC_STR-BOPNR sy-vline 
WA_LFM2_PRC_STR-XERSR sy-vline 
WA_LFM2_PRC_STR-ABUEB sy-vline 
WA_LFM2_PRC_STR-PAPRF sy-vline 
WA_LFM2_PRC_STR-XNBWY sy-vline 
WA_LFM2_PRC_STR-LEBRE sy-vline 
WA_LFM2_PRC_STR-BOLRE sy-vline 
WA_LFM2_PRC_STR-UMSAE sy-vline 
WA_LFM2_PRC_STR-SOURCE_RECENCY sy-vline 
WA_LFM2_PRC_STR-SOURCE_MODIFIED sy-vline 
WA_LFM2_PRC_STR-SOURCE_MODIFICATION_BLIP sy-vline 
WA_LFM2_PRC_STR-SOURCE_INDEX sy-vline 
WA_LFM2_PRC_STR-LIFNR sy-vline 
WA_LFM2_PRC_STR-TARGET_ASSIGNMENT_ID sy-vline 
WA_LFM2_PRC_STR-UPPRS sy-vline 
WA_LFM2_PRC_STR-TRANSPORT_CHAIN sy-vline 
WA_LFM2_PRC_STR-STAGING_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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