ABAP Select data from SAP table PREVVARC into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PREVVARC 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 PREVVARC. 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 PREVVARC 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_PREVVARC TYPE STANDARD TABLE OF PREVVARC,
      WA_PREVVARC TYPE PREVVARC,
      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: <PREVVARC> TYPE PREVVARC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PREVVARC
*  INTO TABLE @DATA(IT_PREVVARC2).
*--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_PREVVARC INDEX 1 INTO DATA(WA_PREVVARC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PREVVARC>-MANDT = 1.
<PREVVARC>-LEDGER = 1.
<PREVVARC>-SOURCELEDGER = 1.
<PREVVARC>-COMPANYCODE = 1.
<PREVVARC>-FISCALYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PREVVARC-ACCOUNTINGDOCUMENT, sy-vline,
  WA_PREVVARC-LEDGERGLLINEITEM, sy-vline,
  WA_PREVVARC-FINANCIALPLANNINGREQTRANSSQNC, sy-vline,
  WA_PREVVARC-FINANCIALPLANNINGDATAPACKET, sy-vline,
  WA_PREVVARC-FINANCIALPLANNINGENTRYITEM, sy-vline,
  WA_PREVVARC-GLACCOUNTHIERARCHY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PREVVARC 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_PREVVARC 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_PREVVARC INTO WA_PREVVARC.


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

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

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PREVVARC-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PREVVARC-FISCALYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field LEDGERFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PREVVARC-LEDGERFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PREVVARC-LEDGERFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ORDERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PREVVARC-ORDERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PREVVARC-ORDERID.
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_PREVVARC_STR, 
MANDT TYPE STRING,
LEDGER TYPE STRING,
SOURCELEDGER TYPE STRING,
COMPANYCODE TYPE STRING,
FISCALYEAR TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
LEDGERGLLINEITEM TYPE STRING,
FINANCIALPLANNINGREQTRANSSQNC TYPE STRING,
FINANCIALPLANNINGDATAPACKET TYPE STRING,
FINANCIALPLANNINGENTRYITEM TYPE STRING,
GLACCOUNTHIERARCHY TYPE STRING,
QUANTITYTYPE TYPE STRING,
FISCALPERIOD TYPE STRING,
PLANNINGCATEGORY TYPE STRING,
BASEUNIT TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
SALESORGANIZATION TYPE STRING,
ORGANIZATIONDIVISION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
CUSTOMER TYPE STRING,
SOLDMATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
CUSTOMERGROUP TYPE STRING,
GLACCOUNT TYPE STRING,
PROFITCENTER TYPE STRING,
CUSTOMERSUPPLIERCOUNTRY TYPE STRING,
CUSTOMERSUPPLIERINDUSTRY TYPE STRING,
DOCUMENTDATE TYPE STRING,
GLOBALCURRENCY TYPE STRING,
ACTLBILLEDREVENUEAMTINGLOBCRCY TYPE STRING,
PLNBILLEDREVENUEAMTINGLOBCRCY TYPE STRING,
VALUATIONQUANTITY TYPE STRING,
SEMANTICTAG TYPE STRING,
ACCOUNTASSIGNMENTTYPE TYPE STRING,
ACTUALPLANCODE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
DIVISION TYPE STRING,
SALESDISTRICT TYPE STRING,
ACTLRECGDREVENUEAMTINGLOBCRCY TYPE STRING,
PLNRECGDREVENUEAMTINGLOBCRCY TYPE STRING,
ACTUALREVENUEAMTINCCCRCY TYPE STRING,
PLNREVENUEAMOUNTINCCCRCY TYPE STRING,
LEDGERFISCALYEAR TYPE STRING,
FISCALYEARVARIANT TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
ASSETCLASS TYPE STRING,
FINANCIALACCOUNTTYPE TYPE STRING,
BUSINESSAREA TYPE STRING,
SEGMENT TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCENTER TYPE STRING,
PLANT TYPE STRING,
VALUATIONAREA TYPE STRING,
SERVICEDOCUMENT TYPE STRING,
SERVICEDOCUMENTTYPE TYPE STRING,
POSTINGDATE TYPE STRING,
SUPPLIER TYPE STRING,
SALESDOCUMENT TYPE STRING,
ORDERID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PREVVARC_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_PREVVARC_STR-MANDT sy-vline 
WA_PREVVARC_STR-LEDGER sy-vline 
WA_PREVVARC_STR-SOURCELEDGER sy-vline 
WA_PREVVARC_STR-COMPANYCODE sy-vline 
WA_PREVVARC_STR-FISCALYEAR sy-vline 
WA_PREVVARC_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PREVVARC_STR-LEDGERGLLINEITEM sy-vline 
WA_PREVVARC_STR-FINANCIALPLANNINGREQTRANSSQNC sy-vline 
WA_PREVVARC_STR-FINANCIALPLANNINGDATAPACKET sy-vline 
WA_PREVVARC_STR-FINANCIALPLANNINGENTRYITEM sy-vline 
WA_PREVVARC_STR-GLACCOUNTHIERARCHY sy-vline 
WA_PREVVARC_STR-QUANTITYTYPE sy-vline 
WA_PREVVARC_STR-FISCALPERIOD sy-vline 
WA_PREVVARC_STR-PLANNINGCATEGORY sy-vline 
WA_PREVVARC_STR-BASEUNIT sy-vline 
WA_PREVVARC_STR-COMPANYCODECURRENCY sy-vline 
WA_PREVVARC_STR-SALESORGANIZATION sy-vline 
WA_PREVVARC_STR-ORGANIZATIONDIVISION sy-vline 
WA_PREVVARC_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_PREVVARC_STR-CUSTOMER sy-vline 
WA_PREVVARC_STR-SOLDMATERIAL sy-vline 
WA_PREVVARC_STR-MATERIALGROUP sy-vline 
WA_PREVVARC_STR-CUSTOMERGROUP sy-vline 
WA_PREVVARC_STR-GLACCOUNT sy-vline 
WA_PREVVARC_STR-PROFITCENTER sy-vline 
WA_PREVVARC_STR-CUSTOMERSUPPLIERCOUNTRY sy-vline 
WA_PREVVARC_STR-CUSTOMERSUPPLIERINDUSTRY sy-vline 
WA_PREVVARC_STR-DOCUMENTDATE sy-vline 
WA_PREVVARC_STR-GLOBALCURRENCY sy-vline 
WA_PREVVARC_STR-ACTLBILLEDREVENUEAMTINGLOBCRCY sy-vline 
WA_PREVVARC_STR-PLNBILLEDREVENUEAMTINGLOBCRCY sy-vline 
WA_PREVVARC_STR-VALUATIONQUANTITY sy-vline 
WA_PREVVARC_STR-SEMANTICTAG sy-vline 
WA_PREVVARC_STR-ACCOUNTASSIGNMENTTYPE sy-vline 
WA_PREVVARC_STR-ACTUALPLANCODE sy-vline 
WA_PREVVARC_STR-VALIDITYSTARTDATE sy-vline 
WA_PREVVARC_STR-VALIDITYENDDATE sy-vline 
WA_PREVVARC_STR-DIVISION sy-vline 
WA_PREVVARC_STR-SALESDISTRICT sy-vline 
WA_PREVVARC_STR-ACTLRECGDREVENUEAMTINGLOBCRCY sy-vline 
WA_PREVVARC_STR-PLNRECGDREVENUEAMTINGLOBCRCY sy-vline 
WA_PREVVARC_STR-ACTUALREVENUEAMTINCCCRCY sy-vline 
WA_PREVVARC_STR-PLNREVENUEAMOUNTINCCCRCY sy-vline 
WA_PREVVARC_STR-LEDGERFISCALYEAR sy-vline 
WA_PREVVARC_STR-FISCALYEARVARIANT sy-vline 
WA_PREVVARC_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_PREVVARC_STR-ASSETCLASS sy-vline 
WA_PREVVARC_STR-FINANCIALACCOUNTTYPE sy-vline 
WA_PREVVARC_STR-BUSINESSAREA sy-vline 
WA_PREVVARC_STR-SEGMENT sy-vline 
WA_PREVVARC_STR-CONTROLLINGAREA sy-vline 
WA_PREVVARC_STR-COSTCENTER sy-vline 
WA_PREVVARC_STR-PLANT sy-vline 
WA_PREVVARC_STR-VALUATIONAREA sy-vline 
WA_PREVVARC_STR-SERVICEDOCUMENT sy-vline 
WA_PREVVARC_STR-SERVICEDOCUMENTTYPE sy-vline 
WA_PREVVARC_STR-POSTINGDATE sy-vline 
WA_PREVVARC_STR-SUPPLIER sy-vline 
WA_PREVVARC_STR-SALESDOCUMENT sy-vline 
WA_PREVVARC_STR-ORDERID sy-vline      INTO ld_text SEPARATED BY SPACE.

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