ABAP Select data from SAP table AVILMRGDTSRV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVILMRGDTSRV
*  INTO TABLE @DATA(IT_AVILMRGDTSRV2).
*--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_AVILMRGDTSRV INDEX 1 INTO DATA(WA_AVILMRGDTSRV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVILMRGDTSRV>-MANDT = 1.
<AVILMRGDTSRV>-INTRENO = 1.
<AVILMRGDTSRV>-LRREGNO = 1.
<AVILMRGDTSRV>-LRREGSUBNO = 1.
<AVILMRGDTSRV>-LRREGSUBNOSRV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVILMRGDTSRV-PLEXTIDENTKEY, sy-vline,
  WA_AVILMRGDTSRV-PLOBJNR, sy-vline,
  WA_AVILMRGDTSRV-LRDISTRICT, sy-vline,
  WA_AVILMRGDTSRV-LRVOLUMENO, sy-vline,
  WA_AVILMRGDTSRV-LRPAGENO, sy-vline,
  WA_AVILMRGDTSRV-SECTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVILMRGDTSRV 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_AVILMRGDTSRV 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_AVILMRGDTSRV INTO WA_AVILMRGDTSRV.


*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 LRREG, internal->external for field LRREGNO
CALL FUNCTION 'CONVERSION_EXIT_LRREG_OUTPUT'
  EXPORTING
    input =                      WA_AVILMRGDTSRV-LRREGNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVILMRGDTSRV-LRREGNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRPGN, internal->external for field LRPAGENO
CALL FUNCTION 'CONVERSION_EXIT_LRPGN_OUTPUT'
  EXPORTING
    input =                      WA_AVILMRGDTSRV-LRPAGENO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVILMRGDTSRV-LRPAGENO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRSEC, internal->external for field SECNO
CALL FUNCTION 'CONVERSION_EXIT_LRSEC_OUTPUT'
  EXPORTING
    input =                      WA_AVILMRGDTSRV-SECNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVILMRGDTSRV-SECNO.
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_AVILMRGDTSRV_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
LRREGNO TYPE STRING,
LRREGSUBNO TYPE STRING,
LRREGSUBNOSRV TYPE STRING,
PLEXTIDENTKEY TYPE STRING,
PLOBJNR TYPE STRING,
LRDISTRICT TYPE STRING,
LRVOLUMENO TYPE STRING,
LRPAGENO TYPE STRING,
SECTYPE TYPE STRING,
SECNO TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVILMRGDTSRV_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_AVILMRGDTSRV_STR-MANDT sy-vline 
WA_AVILMRGDTSRV_STR-INTRENO sy-vline 
WA_AVILMRGDTSRV_STR-LRREGNO sy-vline 
WA_AVILMRGDTSRV_STR-LRREGSUBNO sy-vline 
WA_AVILMRGDTSRV_STR-LRREGSUBNOSRV sy-vline 
WA_AVILMRGDTSRV_STR-PLEXTIDENTKEY sy-vline 
WA_AVILMRGDTSRV_STR-PLOBJNR sy-vline 
WA_AVILMRGDTSRV_STR-LRDISTRICT sy-vline 
WA_AVILMRGDTSRV_STR-LRVOLUMENO sy-vline 
WA_AVILMRGDTSRV_STR-LRPAGENO sy-vline 
WA_AVILMRGDTSRV_STR-SECTYPE sy-vline 
WA_AVILMRGDTSRV_STR-SECNO sy-vline 
WA_AVILMRGDTSRV_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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