ABAP Select data from SAP table VILMEM_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VILMEM_TAB
*  INTO TABLE @DATA(IT_VILMEM_TAB2).
*--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_VILMEM_TAB INDEX 1 INTO DATA(WA_VILMEM_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VILMEM_TAB>-ENTRYDATE = 1.
<VILMEM_TAB>-CANCELDATE = 1.
<VILMEM_TAB>-APPLICATIONDATE = 1.
<VILMEM_TAB>-APPROVALDATE = 1.
<VILMEM_TAB>-ENCVALIDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VILMEM_TAB-ENCUMBRANCETYPE, sy-vline,
  WA_VILMEM_TAB-RANKINGNO, sy-vline,
  WA_VILMEM_TAB-RANKSECTYPE, sy-vline,
  WA_VILMEM_TAB-RANKBEFSECNO, sy-vline,
  WA_VILMEM_TAB-RANKFORSECNO, sy-vline,
  WA_VILMEM_TAB-PROCESSINGNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VILMEM_TAB 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_VILMEM_TAB 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_VILMEM_TAB INTO WA_VILMEM_TAB.


*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 REDAT, internal->external for field CANCELDATE
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VILMEM_TAB-CANCELDATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMEM_TAB-CANCELDATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field ENCVALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VILMEM_TAB-ENCVALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMEM_TAB-ENCVALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRSEC, internal->external for field RANKBEFSECNO
CALL FUNCTION 'CONVERSION_EXIT_LRSEC_OUTPUT'
  EXPORTING
    input =                      WA_VILMEM_TAB-RANKBEFSECNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMEM_TAB-RANKBEFSECNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRSEC, internal->external for field RANKFORSECNO
CALL FUNCTION 'CONVERSION_EXIT_LRSEC_OUTPUT'
  EXPORTING
    input =                      WA_VILMEM_TAB-RANKFORSECNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMEM_TAB-RANKFORSECNO.
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_VILMEM_TAB_STR, 
ENTRYDATE TYPE STRING,
CANCELDATE TYPE STRING,
APPLICATIONDATE TYPE STRING,
APPROVALDATE TYPE STRING,
ENCVALIDTO TYPE STRING,
ENCUMBRANCETYPE TYPE STRING,
RANKINGNO TYPE STRING,
RANKSECTYPE TYPE STRING,
RANKBEFSECNO TYPE STRING,
RANKFORSECNO TYPE STRING,
PROCESSINGNO TYPE STRING,
LANDCHRGCERT TYPE STRING,
LANDCHRGINTRATE TYPE STRING,
ENCVALUE TYPE STRING,
ENCCURRENCY TYPE STRING,
XCOMMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VILMEM_TAB_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_VILMEM_TAB_STR-ENTRYDATE sy-vline 
WA_VILMEM_TAB_STR-CANCELDATE sy-vline 
WA_VILMEM_TAB_STR-APPLICATIONDATE sy-vline 
WA_VILMEM_TAB_STR-APPROVALDATE sy-vline 
WA_VILMEM_TAB_STR-ENCVALIDTO sy-vline 
WA_VILMEM_TAB_STR-ENCUMBRANCETYPE sy-vline 
WA_VILMEM_TAB_STR-RANKINGNO sy-vline 
WA_VILMEM_TAB_STR-RANKSECTYPE sy-vline 
WA_VILMEM_TAB_STR-RANKBEFSECNO sy-vline 
WA_VILMEM_TAB_STR-RANKFORSECNO sy-vline 
WA_VILMEM_TAB_STR-PROCESSINGNO sy-vline 
WA_VILMEM_TAB_STR-LANDCHRGCERT sy-vline 
WA_VILMEM_TAB_STR-LANDCHRGINTRATE sy-vline 
WA_VILMEM_TAB_STR-ENCVALUE sy-vline 
WA_VILMEM_TAB_STR-ENCCURRENCY sy-vline 
WA_VILMEM_TAB_STR-XCOMMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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