ABAP Select data from SAP table VFCLMMMPISCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VFCLMMMPISCH
*  INTO TABLE @DATA(IT_VFCLMMMPISCH2).
*--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_VFCLMMMPISCH INDEX 1 INTO DATA(WA_VFCLMMMPISCH2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VFCLMMMPISCH-CONDITIONCOUNT, sy-vline,
  WA_VFCLMMMPISCH-SCHEDULELINE, sy-vline,
  WA_VFCLMMMPISCH-INVOICEPLANNUMBER, sy-vline,
  WA_VFCLMMMPISCH-INVOICEPLANITEM, sy-vline,
  WA_VFCLMMMPISCH-INVOICEPLANSTATUS, sy-vline,
  WA_VFCLMMMPISCH-SUPPLIER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VFCLMMMPISCH 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_VFCLMMMPISCH 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_VFCLMMMPISCH INTO WA_VFCLMMMPISCH.


*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_VFCLMMMPISCH-PURCHASINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFCLMMMPISCH-PURCHASINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VFCLMMMPISCH-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFCLMMMPISCH-MATERIAL.
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_VFCLMMMPISCH_STR, 
MANDT TYPE STRING,
PO_ITEM_CAT TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
CONDITIONSTEP TYPE STRING,
CONDITIONCOUNT TYPE STRING,
SCHEDULELINE TYPE STRING,
INVOICEPLANNUMBER TYPE STRING,
INVOICEPLANITEM TYPE STRING,
INVOICEPLANSTATUS TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
MATERIALGROUP TYPE STRING,
PLANT TYPE STRING,
COMPANYCODE TYPE STRING,
MATERIAL TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
CURRENCY TYPE STRING,
PURCHASEORDERQTY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
PURCHASEORDERNETAMOUNT TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
VALUEBASEDCOMMITMENT TYPE STRING,
GOODSRECEIPTNONVALUATED TYPE STRING,
ISRETURNSITEM TYPE STRING,
SCHEDLINESTSCDELIVERYDATE TYPE STRING,
PURCHASEORDERNETAMOUNTSCHDIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VFCLMMMPISCH_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_VFCLMMMPISCH_STR-MANDT sy-vline 
WA_VFCLMMMPISCH_STR-PO_ITEM_CAT sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASINGDOCUMENT sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_VFCLMMMPISCH_STR-CONDITIONSTEP sy-vline 
WA_VFCLMMMPISCH_STR-CONDITIONCOUNT sy-vline 
WA_VFCLMMMPISCH_STR-SCHEDULELINE sy-vline 
WA_VFCLMMMPISCH_STR-INVOICEPLANNUMBER sy-vline 
WA_VFCLMMMPISCH_STR-INVOICEPLANITEM sy-vline 
WA_VFCLMMMPISCH_STR-INVOICEPLANSTATUS sy-vline 
WA_VFCLMMMPISCH_STR-SUPPLIER sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_VFCLMMMPISCH_STR-MATERIALGROUP sy-vline 
WA_VFCLMMMPISCH_STR-PLANT sy-vline 
WA_VFCLMMMPISCH_STR-COMPANYCODE sy-vline 
WA_VFCLMMMPISCH_STR-MATERIAL sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASINGGROUP sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASINGORGANIZATION sy-vline 
WA_VFCLMMMPISCH_STR-CURRENCY sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASEORDERQTY sy-vline 
WA_VFCLMMMPISCH_STR-COMPANYCODECURRENCY sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASEORDERNETAMOUNT sy-vline 
WA_VFCLMMMPISCH_STR-PAYMENTTERMS sy-vline 
WA_VFCLMMMPISCH_STR-CASHDISCOUNT1DAYS sy-vline 
WA_VFCLMMMPISCH_STR-CASHDISCOUNT2DAYS sy-vline 
WA_VFCLMMMPISCH_STR-NETPAYMENTDAYS sy-vline 
WA_VFCLMMMPISCH_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_VFCLMMMPISCH_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_VFCLMMMPISCH_STR-VALUEBASEDCOMMITMENT sy-vline 
WA_VFCLMMMPISCH_STR-GOODSRECEIPTNONVALUATED sy-vline 
WA_VFCLMMMPISCH_STR-ISRETURNSITEM sy-vline 
WA_VFCLMMMPISCH_STR-SCHEDLINESTSCDELIVERYDATE sy-vline 
WA_VFCLMMMPISCH_STR-PURCHASEORDERNETAMOUNTSCHDIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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