ABAP Select data from SAP table TRACS_LEDGER_INFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRACS_LEDGER_INFO
*  INTO TABLE @DATA(IT_TRACS_LEDGER_INFO2).
*--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_TRACS_LEDGER_INFO INDEX 1 INTO DATA(WA_TRACS_LEDGER_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRACS_LEDGER_INFO>-RLDNR = 1.
<TRACS_LEDGER_INFO>-TRCUR = 1.
<TRACS_LEDGER_INFO>-GCURR = 1.
<TRACS_LEDGER_INFO>-LCCUR = 1.
<TRACS_LEDGER_INFO>-RCCUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRACS_LEDGER_INFO-OCCUR, sy-vline,
  WA_TRACS_LEDGER_INFO-CURT1, sy-vline,
  WA_TRACS_LEDGER_INFO-CURT2, sy-vline,
  WA_TRACS_LEDGER_INFO-CURT3, sy-vline,
  WA_TRACS_LEDGER_INFO-GLSIP, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TRACS_LEDGER_INFO 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_TRACS_LEDGER_INFO 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_TRACS_LEDGER_INFO INTO WA_TRACS_LEDGER_INFO.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRACS_LEDGER_INFO-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRACS_LEDGER_INFO-RLDNR.
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_TRACS_LEDGER_INFO_STR, 
RLDNR TYPE STRING,
TRCUR TYPE STRING,
GCURR TYPE STRING,
LCCUR TYPE STRING,
RCCUR TYPE STRING,
OCCUR TYPE STRING,
CURT1 TYPE STRING,
CURT2 TYPE STRING,
CURT3 TYPE STRING,
GLSIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRACS_LEDGER_INFO_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_TRACS_LEDGER_INFO_STR-RLDNR sy-vline 
WA_TRACS_LEDGER_INFO_STR-TRCUR sy-vline 
WA_TRACS_LEDGER_INFO_STR-GCURR sy-vline 
WA_TRACS_LEDGER_INFO_STR-LCCUR sy-vline 
WA_TRACS_LEDGER_INFO_STR-RCCUR sy-vline 
WA_TRACS_LEDGER_INFO_STR-OCCUR sy-vline 
WA_TRACS_LEDGER_INFO_STR-CURT1 sy-vline 
WA_TRACS_LEDGER_INFO_STR-CURT2 sy-vline 
WA_TRACS_LEDGER_INFO_STR-CURT3 sy-vline 
WA_TRACS_LEDGER_INFO_STR-GLSIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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