ABAP Select data from SAP table RELM_LR_EM_CONTRACT_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELM_LR_EM_CONTRACT_L
*  INTO TABLE @DATA(IT_RELM_LR_EM_CONTRACT_L2).
*--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_RELM_LR_EM_CONTRACT_L INDEX 1 INTO DATA(WA_RELM_LR_EM_CONTRACT_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELM_LR_EM_CONTRACT_L>-MANDT = 1.
<RELM_LR_EM_CONTRACT_L>-INTRENO = 1.
<RELM_LR_EM_CONTRACT_L>-SECTYPE = 1.
<RELM_LR_EM_CONTRACT_L>-SECNO = 1.
<RELM_LR_EM_CONTRACT_L>-SECSUBNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELM_LR_EM_CONTRACT_L-ENTRYNO, sy-vline,
  WA_RELM_LR_EM_CONTRACT_L-CNOBJNR, sy-vline,
  WA_RELM_LR_EM_CONTRACT_L-IDENTKEY, sy-vline,
  WA_RELM_LR_EM_CONTRACT_L-BUKRS, sy-vline,
  WA_RELM_LR_EM_CONTRACT_L-RECNNR, sy-vline,
  WA_RELM_LR_EM_CONTRACT_L-RECNTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELM_LR_EM_CONTRACT_L 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_RELM_LR_EM_CONTRACT_L 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_RELM_LR_EM_CONTRACT_L INTO WA_RELM_LR_EM_CONTRACT_L.


*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 LRSEC, internal->external for field SECNO
CALL FUNCTION 'CONVERSION_EXIT_LRSEC_OUTPUT'
  EXPORTING
    input =                      WA_RELM_LR_EM_CONTRACT_L-SECNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELM_LR_EM_CONTRACT_L-SECNO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REDAT, internal->external for field RECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RELM_LR_EM_CONTRACT_L-RECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELM_LR_EM_CONTRACT_L-RECNENDABS.
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_RELM_LR_EM_CONTRACT_L_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
SECTYPE TYPE STRING,
SECNO TYPE STRING,
SECSUBNO TYPE STRING,
ENTRYNO TYPE STRING,
CNOBJNR TYPE STRING,
IDENTKEY TYPE STRING,
BUKRS TYPE STRING,
RECNNR TYPE STRING,
RECNTYPE TYPE STRING,
RECNBEG TYPE STRING,
RECNENDABS TYPE STRING,
RECNTXT TYPE STRING,
RECNDACTIV TYPE STRING,
XBUKRS TYPE STRING,
XRECNTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELM_LR_EM_CONTRACT_L_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_RELM_LR_EM_CONTRACT_L_STR-MANDT sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-INTRENO sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-SECTYPE sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-SECNO sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-SECSUBNO sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-ENTRYNO sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-CNOBJNR sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-IDENTKEY sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-BUKRS sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNNR sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNTYPE sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNBEG sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNENDABS sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNTXT sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-RECNDACTIV sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-XBUKRS sy-vline 
WA_RELM_LR_EM_CONTRACT_L_STR-XRECNTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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