ABAP Select data from SAP table VCCGLT_MTLS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VCCGLT_MTLS
*  INTO TABLE @DATA(IT_VCCGLT_MTLS2).
*--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_VCCGLT_MTLS INDEX 1 INTO DATA(WA_VCCGLT_MTLS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VCCGLT_MTLS>-MANDT = 1.
<VCCGLT_MTLS>-RECN = 1.
<VCCGLT_MTLS>-ACTN = 1.
<VCCGLT_MTLS>-MATNR = 1.
<VCCGLT_MTLS>-RECNROOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VCCGLT_MTLS-DELFLG, sy-vline,
  WA_VCCGLT_MTLS-CRDAT, sy-vline,
  WA_VCCGLT_MTLS-CRNAM, sy-vline,
  WA_VCCGLT_MTLS-UPDDAT, sy-vline,
  WA_VCCGLT_MTLS-UPDNAM, sy-vline,
  WA_VCCGLT_MTLS-PUOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VCCGLT_MTLS 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_VCCGLT_MTLS 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_VCCGLT_MTLS INTO WA_VCCGLT_MTLS.


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

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

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

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

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

*Conversion exit CHRID, internal->external for field LDEPID
CALL FUNCTION 'CONVERSION_EXIT_CHRID_OUTPUT'
  EXPORTING
    input =                      WA_VCCGLT_MTLS-LDEPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCCGLT_MTLS-LDEPID.
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_VCCGLT_MTLS_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
MATNR TYPE STRING,
RECNROOT TYPE STRING,
DELFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
PUOM TYPE STRING,
LTYP TYPE STRING,
LSIZE TYPE STRING,
LDEPID TYPE STRING,
NUM_LBLS TYPE STRING,
FLG_LOCK TYPE STRING,
FLG_VAL TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VCCGLT_MTLS_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_VCCGLT_MTLS_STR-MANDT sy-vline 
WA_VCCGLT_MTLS_STR-RECN sy-vline 
WA_VCCGLT_MTLS_STR-ACTN sy-vline 
WA_VCCGLT_MTLS_STR-MATNR sy-vline 
WA_VCCGLT_MTLS_STR-RECNROOT sy-vline 
WA_VCCGLT_MTLS_STR-DELFLG sy-vline 
WA_VCCGLT_MTLS_STR-CRDAT sy-vline 
WA_VCCGLT_MTLS_STR-CRNAM sy-vline 
WA_VCCGLT_MTLS_STR-UPDDAT sy-vline 
WA_VCCGLT_MTLS_STR-UPDNAM sy-vline 
WA_VCCGLT_MTLS_STR-PUOM sy-vline 
WA_VCCGLT_MTLS_STR-LTYP sy-vline 
WA_VCCGLT_MTLS_STR-LSIZE sy-vline 
WA_VCCGLT_MTLS_STR-LDEPID sy-vline 
WA_VCCGLT_MTLS_STR-NUM_LBLS sy-vline 
WA_VCCGLT_MTLS_STR-FLG_LOCK sy-vline 
WA_VCCGLT_MTLS_STR-FLG_VAL sy-vline 
WA_VCCGLT_MTLS_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.