ABAP Select data from SAP table /TDAG/RCSS_EP_LOA_BAPI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/RCSS_EP_LOA_BAPI 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 /TDAG/RCSS_EP_LOA_BAPI. 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 /TDAG/RCSS_EP_LOA_BAPI 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_/TDAG/RCSS_EP_LOA_BAPI TYPE STANDARD TABLE OF /TDAG/RCSS_EP_LOA_BAPI,
      WA_/TDAG/RCSS_EP_LOA_BAPI TYPE /TDAG/RCSS_EP_LOA_BAPI,
      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: </TDAG/RCSS_EP_LOA_BAPI> TYPE /TDAG/RCSS_EP_LOA_BAPI.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/RCSS_EP_LOA_BAPI
  INTO TABLE IT_/TDAG/RCSS_EP_LOA_BAPI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/RCSS_EP_LOA_BAPI
*  INTO TABLE @DATA(IT_/TDAG/RCSS_EP_LOA_BAPI2).
*--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_/TDAG/RCSS_EP_LOA_BAPI INDEX 1 INTO DATA(WA_/TDAG/RCSS_EP_LOA_BAPI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/RCSS_EP_LOA_BAPI ASSIGNING </TDAG/RCSS_EP_LOA_BAPI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/RCSS_EP_LOA_BAPI>-MANDT = 1.
</TDAG/RCSS_EP_LOA_BAPI>-GUID = 1.
</TDAG/RCSS_EP_LOA_BAPI>-CRDAT = 1.
</TDAG/RCSS_EP_LOA_BAPI>-CRNAM = 1.
</TDAG/RCSS_EP_LOA_BAPI>-CRTSTMP = 1.

ENDLOOP.

LOOP AT IT_/TDAG/RCSS_EP_LOA_BAPI INTO WA_/TDAG/RCSS_EP_LOA_BAPI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/RCSS_EP_LOA_BAPI-UPDDAT, sy-vline,
  WA_/TDAG/RCSS_EP_LOA_BAPI-UPDNAM, sy-vline,
  WA_/TDAG/RCSS_EP_LOA_BAPI-UPDTSTMP, sy-vline,
  WA_/TDAG/RCSS_EP_LOA_BAPI-DELFLG, sy-vline,
  WA_/TDAG/RCSS_EP_LOA_BAPI-LOA_TYPE, sy-vline,
  WA_/TDAG/RCSS_EP_LOA_BAPI-REFGUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/RCSS_EP_LOA_BAPI 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_/TDAG/RCSS_EP_LOA_BAPI 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_/TDAG/RCSS_EP_LOA_BAPI INTO WA_/TDAG/RCSS_EP_LOA_BAPI.


*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 RECNROOT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_EP_LOA_BAPI-RECNROOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_EP_LOA_BAPI-RECNROOT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_EP_LOA_BAPI-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_EP_LOA_BAPI-DOKNR.
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_/TDAG/RCSS_EP_LOA_BAPI_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
CRTSTMP TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
UPDTSTMP TYPE STRING,
DELFLG TYPE STRING,
LOA_TYPE TYPE STRING,
REFGUID TYPE STRING,
RECNROOT TYPE STRING,
PUR_LEG_ENT TYPE STRING,
ENTRPRS_IS_OWNER TYPE STRING,
EXT_PURCHASER_BP TYPE STRING,
EXT_PURCHASER_C TYPE STRING,
PRICE TYPE STRING,
PRICE_CURRENCY TYPE STRING,
LOA_DATE TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DOKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/RCSS_EP_LOA_BAPI_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_/TDAG/RCSS_EP_LOA_BAPI_STR-MANDT sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-GUID sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-CRDAT sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-CRNAM sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-CRTSTMP sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-UPDDAT sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-UPDNAM sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-UPDTSTMP sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DELFLG sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-LOA_TYPE sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-REFGUID sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-RECNROOT sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-PUR_LEG_ENT sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-ENTRPRS_IS_OWNER sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-EXT_PURCHASER_BP sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-EXT_PURCHASER_C sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-PRICE sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-PRICE_CURRENCY sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-LOA_DATE sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DOKNR sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DOKAR sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DOKVR sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DOKTL sy-vline 
WA_/TDAG/RCSS_EP_LOA_BAPI_STR-DOKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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