ABAP Select data from SAP table FJEPS_RT_ITEM_MATERIAL_LEDGER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FJEPS_RT_ITEM_MATERIAL_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 FJEPS_RT_ITEM_MATERIAL_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 FJEPS_RT_ITEM_MATERIAL_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_FJEPS_RT_ITEM_MATERIAL_LEDGER TYPE STANDARD TABLE OF FJEPS_RT_ITEM_MATERIAL_LEDGER,
      WA_FJEPS_RT_ITEM_MATERIAL_LEDGER TYPE FJEPS_RT_ITEM_MATERIAL_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: <FJEPS_RT_ITEM_MATERIAL_LEDGER> TYPE FJEPS_RT_ITEM_MATERIAL_LEDGER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FJEPS_RT_ITEM_MATERIAL_LEDGER
*  INTO TABLE @DATA(IT_FJEPS_RT_ITEM_MATERIAL_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_FJEPS_RT_ITEM_MATERIAL_LEDGER INDEX 1 INTO DATA(WA_FJEPS_RT_ITEM_MATERIAL_LEDGER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FJEPS_RT_ITEM_MATERIAL_LEDGER>-CHAIN_PROCESS_CATEGORY_TYPE = 1.
<FJEPS_RT_ITEM_MATERIAL_LEDGER>-COST_ESTIMATE = 1.
<FJEPS_RT_ITEM_MATERIAL_LEDGER>-DOCUMENT = 1.
<FJEPS_RT_ITEM_MATERIAL_LEDGER>-DOCUMENT_ITEM = 1.
<FJEPS_RT_ITEM_MATERIAL_LEDGER>-INVENTORY_MOVEMENT_CATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-IS_VENDOR_STOCK_VALUATION, sy-vline,
  WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-MATERIAL_PRICE_CONTROL, sy-vline,
  WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-PERIOD_TYPE, sy-vline,
  WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-PRICE_DETERMINATION_CONTROL, sy-vline,
  WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_VALUATION_TYPE, sy-vline,
  WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_SALES_DOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FJEPS_RT_ITEM_MATERIAL_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_FJEPS_RT_ITEM_MATERIAL_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_FJEPS_RT_ITEM_MATERIAL_LEDGER INTO WA_FJEPS_RT_ITEM_MATERIAL_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 DOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-DOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-DOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field SPECIAL_STOCK_WBS_EL_INTID
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_WBS_EL_INTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_WBS_EL_INTID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field SPECIAL_STOCK_WBS_ELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_WBS_ELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FJEPS_RT_ITEM_MATERIAL_LEDGER-SPECIAL_STOCK_WBS_ELEMENT.
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_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR, 
CHAIN_PROCESS_CATEGORY_TYPE TYPE STRING,
COST_ESTIMATE TYPE STRING,
DOCUMENT TYPE STRING,
DOCUMENT_ITEM TYPE STRING,
INVENTORY_MOVEMENT_CATEGORY TYPE STRING,
IS_VENDOR_STOCK_VALUATION TYPE STRING,
MATERIAL_PRICE_CONTROL TYPE STRING,
PERIOD_TYPE TYPE STRING,
PRICE_DETERMINATION_CONTROL TYPE STRING,
SPECIAL_STOCK_VALUATION_TYPE TYPE STRING,
SPECIAL_STOCK_SALES_DOC TYPE STRING,
SPECIAL_STOCK_SALES_DOC_ITEM TYPE STRING,
SPECIAL_STOCK_SUPPLIER TYPE STRING,
SPECIAL_STOCK_TYPE TYPE STRING,
SPECIAL_STOCK_WBS_EL_INTID TYPE STRING,
SPECIAL_STOCK_WBS_ELEMENT TYPE STRING,
VALUATION_AREA TYPE STRING,
VALUATION_TIMESTAMP TYPE STRING,
VALUATION_TYPE TYPE STRING,
VALUE_CHAIN_CATEGORY TYPE STRING,
VALUE_CHAIN_PROCESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FJEPS_RT_ITEM_MATERIAL_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_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-CHAIN_PROCESS_CATEGORY_TYPE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-COST_ESTIMATE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-DOCUMENT sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-DOCUMENT_ITEM sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-INVENTORY_MOVEMENT_CATEGORY sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-IS_VENDOR_STOCK_VALUATION sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-MATERIAL_PRICE_CONTROL sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-PERIOD_TYPE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-PRICE_DETERMINATION_CONTROL sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_VALUATION_TYPE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_SALES_DOC sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_SALES_DOC_ITEM sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_SUPPLIER sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_TYPE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_WBS_EL_INTID sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-SPECIAL_STOCK_WBS_ELEMENT sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-VALUATION_AREA sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-VALUATION_TIMESTAMP sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-VALUATION_TYPE sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-VALUE_CHAIN_CATEGORY sy-vline 
WA_FJEPS_RT_ITEM_MATERIAL_LEDGER_STR-VALUE_CHAIN_PROCESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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