ABAP Select data from SAP table ACRS_MY_GAF_LEDGER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACRS_MY_GAF_LEDGER
*  INTO TABLE @DATA(IT_ACRS_MY_GAF_LEDGER2).
*--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_ACRS_MY_GAF_LEDGER INDEX 1 INTO DATA(WA_ACRS_MY_GAF_LEDGER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACRS_MY_GAF_LEDGER>-RECORD_IDENTIFIER = 1.
<ACRS_MY_GAF_LEDGER>-TRANSACTIONDATE = 1.
<ACRS_MY_GAF_LEDGER>-ACCOUNTID = 1.
<ACRS_MY_GAF_LEDGER>-ACCOUNTTYPE = 1.
<ACRS_MY_GAF_LEDGER>-ACCOUNTNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACRS_MY_GAF_LEDGER-TRANSACTIONDESCRIPTION, sy-vline,
  WA_ACRS_MY_GAF_LEDGER-ENTITYNAME, sy-vline,
  WA_ACRS_MY_GAF_LEDGER-TRANSACTIONID, sy-vline,
  WA_ACRS_MY_GAF_LEDGER-SOURCEDOCUMENTID, sy-vline,
  WA_ACRS_MY_GAF_LEDGER-SOURCETYPE, sy-vline,
  WA_ACRS_MY_GAF_LEDGER-DEBIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACRS_MY_GAF_LEDGER 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_ACRS_MY_GAF_LEDGER 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_ACRS_MY_GAF_LEDGER INTO WA_ACRS_MY_GAF_LEDGER.


*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 ACCOUNTID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACRS_MY_GAF_LEDGER-ACCOUNTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACRS_MY_GAF_LEDGER-ACCOUNTID.
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_ACRS_MY_GAF_LEDGER_STR, 
RECORD_IDENTIFIER TYPE STRING,
TRANSACTIONDATE TYPE STRING,
ACCOUNTID TYPE STRING,
ACCOUNTTYPE TYPE STRING,
ACCOUNTNAME TYPE STRING,
TRANSACTIONDESCRIPTION TYPE STRING,
ENTITYNAME TYPE STRING,
TRANSACTIONID TYPE STRING,
SOURCEDOCUMENTID TYPE STRING,
SOURCETYPE TYPE STRING,
DEBIT TYPE STRING,
CREDIT TYPE STRING,
RUNNINGBALANCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACRS_MY_GAF_LEDGER_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_ACRS_MY_GAF_LEDGER_STR-RECORD_IDENTIFIER sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-TRANSACTIONDATE sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-ACCOUNTID sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-ACCOUNTTYPE sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-ACCOUNTNAME sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-TRANSACTIONDESCRIPTION sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-ENTITYNAME sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-TRANSACTIONID sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-SOURCEDOCUMENTID sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-SOURCETYPE sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-DEBIT sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-CREDIT sy-vline 
WA_ACRS_MY_GAF_LEDGER_STR-RUNNINGBALANCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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