ABAP Select data from SAP table RELMC_LR_ENCTYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELMC_LR_ENCTYPE
*  INTO TABLE @DATA(IT_RELMC_LR_ENCTYPE2).
*--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_RELMC_LR_ENCTYPE INDEX 1 INTO DATA(WA_RELMC_LR_ENCTYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELMC_LR_ENCTYPE>-MANDT = 1.
<RELMC_LR_ENCTYPE>-ENCUMBRANCETYPE = 1.
<RELMC_LR_ENCTYPE>-USEREG = 1.
<RELMC_LR_ENCTYPE>-USESEC2 = 1.
<RELMC_LR_ENCTYPE>-USESEC3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELMC_LR_ENCTYPE-HASADD, sy-vline,
  WA_RELMC_LR_ENCTYPE-HASSRV, sy-vline,
  WA_RELMC_LR_ENCTYPE-HASHOLDER, sy-vline,
  WA_RELMC_LR_ENCTYPE-HASLIABLEPARTY, sy-vline,
  WA_RELMC_LR_ENCTYPE-HASCN, sy-vline,
  WA_RELMC_LR_ENCTYPE-HASLO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELMC_LR_ENCTYPE 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_RELMC_LR_ENCTYPE 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_RELMC_LR_ENCTYPE INTO WA_RELMC_LR_ENCTYPE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RELMC_LR_ENCTYPE_STR, 
MANDT TYPE STRING,
ENCUMBRANCETYPE TYPE STRING,
USEREG TYPE STRING,
USESEC2 TYPE STRING,
USESEC3 TYPE STRING,
HASADD TYPE STRING,
HASSRV TYPE STRING,
HASHOLDER TYPE STRING,
HASLIABLEPARTY TYPE STRING,
HASCN TYPE STRING,
HASLO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELMC_LR_ENCTYPE_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_RELMC_LR_ENCTYPE_STR-MANDT sy-vline 
WA_RELMC_LR_ENCTYPE_STR-ENCUMBRANCETYPE sy-vline 
WA_RELMC_LR_ENCTYPE_STR-USEREG sy-vline 
WA_RELMC_LR_ENCTYPE_STR-USESEC2 sy-vline 
WA_RELMC_LR_ENCTYPE_STR-USESEC3 sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASADD sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASSRV sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASHOLDER sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASLIABLEPARTY sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASCN sy-vline 
WA_RELMC_LR_ENCTYPE_STR-HASLO sy-vline      INTO ld_text SEPARATED BY SPACE.

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