ABAP Select data from SAP table RLBES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLBES
*  INTO TABLE @DATA(IT_RLBES2).
*--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_RLBES INDEX 1 INTO DATA(WA_RLBES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLBES>-LGNUM = 1.
<RLBES>-BENUM = 1.
<RLBES>-BETYP = 1.
<RLBES>-REFNR = 1.
<RLBES>-BWLVS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLBES-MATNR, sy-vline,
  WA_RLBES-WERKS, sy-vline,
  WA_RLBES-LGORT, sy-vline,
  WA_RLBES-CHARG, sy-vline,
  WA_RLBES-BESTQ, sy-vline,
  WA_RLBES-SOBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLBES 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_RLBES 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_RLBES INTO WA_RLBES.


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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RLBES-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLBES-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LRMEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLBES-LRMEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLBES-LRMEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field NLENR
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_RLBES-NLENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLBES-NLENR.
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_RLBES_STR, 
LGNUM TYPE STRING,
BENUM TYPE STRING,
BETYP TYPE STRING,
REFNR TYPE STRING,
BWLVS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
LSONR TYPE STRING,
LRMEI TYPE STRING,
LETYP TYPE STRING,
WEMPF TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
ANFME TYPE STRING,
SQUIT TYPE STRING,
ZEUGN TYPE STRING,
WDATU TYPE STRING,
VLTYP TYPE STRING,
VLPLA TYPE STRING,
VFDAT TYPE STRING,
NLENR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLBES_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_RLBES_STR-LGNUM sy-vline 
WA_RLBES_STR-BENUM sy-vline 
WA_RLBES_STR-BETYP sy-vline 
WA_RLBES_STR-REFNR sy-vline 
WA_RLBES_STR-BWLVS sy-vline 
WA_RLBES_STR-MATNR sy-vline 
WA_RLBES_STR-WERKS sy-vline 
WA_RLBES_STR-LGORT sy-vline 
WA_RLBES_STR-CHARG sy-vline 
WA_RLBES_STR-BESTQ sy-vline 
WA_RLBES_STR-SOBKZ sy-vline 
WA_RLBES_STR-LSONR sy-vline 
WA_RLBES_STR-LRMEI sy-vline 
WA_RLBES_STR-LETYP sy-vline 
WA_RLBES_STR-WEMPF sy-vline 
WA_RLBES_STR-NLTYP sy-vline 
WA_RLBES_STR-NLBER sy-vline 
WA_RLBES_STR-NLPLA sy-vline 
WA_RLBES_STR-ANFME sy-vline 
WA_RLBES_STR-SQUIT sy-vline 
WA_RLBES_STR-ZEUGN sy-vline 
WA_RLBES_STR-WDATU sy-vline 
WA_RLBES_STR-VLTYP sy-vline 
WA_RLBES_STR-VLPLA sy-vline 
WA_RLBES_STR-VFDAT sy-vline 
WA_RLBES_STR-NLENR sy-vline      INTO ld_text SEPARATED BY SPACE.

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