ABAP Select data from SAP table LXVAS_ACT_RFINPUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXVAS_ACT_RFINPUT
*  INTO TABLE @DATA(IT_LXVAS_ACT_RFINPUT2).
*--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_LXVAS_ACT_RFINPUT INDEX 1 INTO DATA(WA_LXVAS_ACT_RFINPUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXVAS_ACT_RFINPUT>-LOCAT = 1.
<LXVAS_ACT_RFINPUT>-LGNUM = 1.
<LXVAS_ACT_RFINPUT>-WRKST = 1.
<LXVAS_ACT_RFINPUT>-QUEUE = 1.
<LXVAS_ACT_RFINPUT>-DEVTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXVAS_ACT_RFINPUT-DEVIC, sy-vline,
  WA_LXVAS_ACT_RFINPUT-DOCTY, sy-vline,
  WA_LXVAS_ACT_RFINPUT-DOCNR, sy-vline,
  WA_LXVAS_ACT_RFINPUT-DOCIT, sy-vline,
  WA_LXVAS_ACT_RFINPUT-PIID, sy-vline,
  WA_LXVAS_ACT_RFINPUT-PTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXVAS_ACT_RFINPUT 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_LXVAS_ACT_RFINPUT 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_LXVAS_ACT_RFINPUT INTO WA_LXVAS_ACT_RFINPUT.


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

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

*Conversion exit ALPHA, internal->external for field EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXVAS_ACT_RFINPUT-EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXVAS_ACT_RFINPUT-EXIDV.
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_LXVAS_ACT_RFINPUT_STR, 
LOCAT TYPE STRING,
LGNUM TYPE STRING,
WRKST TYPE STRING,
QUEUE TYPE STRING,
DEVTY TYPE STRING,
DEVIC TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
DOCIT TYPE STRING,
PIID TYPE STRING,
PTEXT TYPE STRING,
STORD TYPE STRING,
VORID TYPE STRING,
VLINEN TYPE STRING,
VLINEC TYPE STRING,
EXIDV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXVAS_ACT_RFINPUT_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_LXVAS_ACT_RFINPUT_STR-LOCAT sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-LGNUM sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-WRKST sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-QUEUE sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-DEVTY sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-DEVIC sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-DOCTY sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-DOCNR sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-DOCIT sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-PIID sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-PTEXT sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-STORD sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-VORID sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-VLINEN sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-VLINEC sy-vline 
WA_LXVAS_ACT_RFINPUT_STR-EXIDV sy-vline      INTO ld_text SEPARATED BY SPACE.

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