ABAP Select data from SAP table VFCLMMMALL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VFCLMMMALL
*  INTO TABLE @DATA(IT_VFCLMMMALL2).
*--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_VFCLMMMALL INDEX 1 INTO DATA(WA_VFCLMMMALL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VFCLMMMALL>-MANDT = 1.
<VFCLMMMALL>-PO_ITEM_CAT = 1.
<VFCLMMMALL>-PURCHASINGDOCUMENT = 1.
<VFCLMMMALL>-PURCHASINGDOCUMENTITEM = 1.
<VFCLMMMALL>-ACCOUNTASSIGNMENTNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VFCLMMMALL-SCHEDULELINE, sy-vline,
  WA_VFCLMMMALL-INVOICEPLANITEM, sy-vline,
  WA_VFCLMMMALL-INVOICEPLANNUMBER, sy-vline,
  WA_VFCLMMMALL-CONDITIONSTEP, sy-vline,
  WA_VFCLMMMALL-CONDITIONCOUNT, sy-vline,
  WA_VFCLMMMALL-SHKZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VFCLMMMALL 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_VFCLMMMALL 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_VFCLMMMALL INTO WA_VFCLMMMALL.


*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 PURCHASINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VFCLMMMALL-PURCHASINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFCLMMMALL-PURCHASINGDOCUMENT.
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_VFCLMMMALL_STR, 
MANDT TYPE STRING,
PO_ITEM_CAT TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
ACCOUNTASSIGNMENTNUMBER TYPE STRING,
SCHEDULELINE TYPE STRING,
INVOICEPLANITEM TYPE STRING,
INVOICEPLANNUMBER TYPE STRING,
CONDITIONSTEP TYPE STRING,
CONDITIONCOUNT TYPE STRING,
SHKZG TYPE STRING,
SCHEDLINESTSCDELIVERYDATE TYPE STRING,
AMOUNT TYPE STRING,
PURCHASEORDERHISTCATEGORY TYPE STRING,
PURCHASEORDERTRANSACTIONTYPE TYPE STRING,
CURRENCY TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
GOODSRECEIPTUSED TYPE STRING,
ISRETURNSITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VFCLMMMALL_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_VFCLMMMALL_STR-MANDT sy-vline 
WA_VFCLMMMALL_STR-PO_ITEM_CAT sy-vline 
WA_VFCLMMMALL_STR-PURCHASINGDOCUMENT sy-vline 
WA_VFCLMMMALL_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_VFCLMMMALL_STR-ACCOUNTASSIGNMENTNUMBER sy-vline 
WA_VFCLMMMALL_STR-SCHEDULELINE sy-vline 
WA_VFCLMMMALL_STR-INVOICEPLANITEM sy-vline 
WA_VFCLMMMALL_STR-INVOICEPLANNUMBER sy-vline 
WA_VFCLMMMALL_STR-CONDITIONSTEP sy-vline 
WA_VFCLMMMALL_STR-CONDITIONCOUNT sy-vline 
WA_VFCLMMMALL_STR-SHKZG sy-vline 
WA_VFCLMMMALL_STR-SCHEDLINESTSCDELIVERYDATE sy-vline 
WA_VFCLMMMALL_STR-AMOUNT sy-vline 
WA_VFCLMMMALL_STR-PURCHASEORDERHISTCATEGORY sy-vline 
WA_VFCLMMMALL_STR-PURCHASEORDERTRANSACTIONTYPE sy-vline 
WA_VFCLMMMALL_STR-CURRENCY sy-vline 
WA_VFCLMMMALL_STR-DOCUMENTCURRENCY sy-vline 
WA_VFCLMMMALL_STR-GOODSRECEIPTUSED sy-vline 
WA_VFCLMMMALL_STR-ISRETURNSITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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