ABAP Select data from SAP table V_RLACPO01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_RLACPO01 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 V_RLACPO01. 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 V_RLACPO01 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_V_RLACPO01 TYPE STANDARD TABLE OF V_RLACPO01,
      WA_V_RLACPO01 TYPE V_RLACPO01,
      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: <V_RLACPO01> TYPE V_RLACPO01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_RLACPO01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_RLACPO01
  INTO TABLE IT_V_RLACPO01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_RLACPO01
*  INTO TABLE @DATA(IT_V_RLACPO012).
*--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_V_RLACPO01 INDEX 1 INTO DATA(WA_V_RLACPO012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_RLACPO01 ASSIGNING <V_RLACPO01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_RLACPO01>-MANDT = 1.
<V_RLACPO01>-POSTNO = 1.
<V_RLACPO01>-BJAHR = 1.
<V_RLACPO01>-POSTIT = 1.
<V_RLACPO01>-USNAM = 1.

ENDLOOP.

LOOP AT IT_V_RLACPO01 INTO WA_V_RLACPO01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_RLACPO01-EVTYPE, sy-vline,
  WA_V_RLACPO01-ACCTNO, sy-vline,
  WA_V_RLACPO01-REFLFSNR, sy-vline,
  WA_V_RLACPO01-REFLFSPOS, sy-vline,
  WA_V_RLACPO01-REFDOCDATE, sy-vline,
  WA_V_RLACPO01-REFFRBNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_RLACPO01 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_V_RLACPO01 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_V_RLACPO01 INTO WA_V_RLACPO01.


*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 POSTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-POSTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-POSTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-BJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-BJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-ACCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-ACCTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFLFSNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-REFLFSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-REFLFSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFFRBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-REFFRBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-REFFRBNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RLACPO01-DOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RLACPO01-DOCNO.
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_V_RLACPO01_STR, 
MANDT TYPE STRING,
POSTNO TYPE STRING,
BJAHR TYPE STRING,
POSTIT TYPE STRING,
USNAM TYPE STRING,
EVTYPE TYPE STRING,
ACCTNO TYPE STRING,
REFLFSNR TYPE STRING,
REFLFSPOS TYPE STRING,
REFDOCDATE TYPE STRING,
REFFRBNR TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLIT TYPE STRING,
DOCNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_RLACPO01_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_V_RLACPO01_STR-MANDT sy-vline 
WA_V_RLACPO01_STR-POSTNO sy-vline 
WA_V_RLACPO01_STR-BJAHR sy-vline 
WA_V_RLACPO01_STR-POSTIT sy-vline 
WA_V_RLACPO01_STR-USNAM sy-vline 
WA_V_RLACPO01_STR-EVTYPE sy-vline 
WA_V_RLACPO01_STR-ACCTNO sy-vline 
WA_V_RLACPO01_STR-REFLFSNR sy-vline 
WA_V_RLACPO01_STR-REFLFSPOS sy-vline 
WA_V_RLACPO01_STR-REFDOCDATE sy-vline 
WA_V_RLACPO01_STR-REFFRBNR sy-vline 
WA_V_RLACPO01_STR-MBLNR sy-vline 
WA_V_RLACPO01_STR-MJAHR sy-vline 
WA_V_RLACPO01_STR-MBLIT sy-vline 
WA_V_RLACPO01_STR-DOCNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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