ABAP Select data from SAP table ETTA into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETTA
*  INTO TABLE @DATA(IT_ETTA2).
*--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_ETTA INDEX 1 INTO DATA(WA_ETTA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETTA>-MANDT = 1.
<ETTA>-TARIFTYP = 1.
<ETTA>-SPARTE = 1.
<ETTA>-AKLASSE = 1.
<ETTA>-GASABART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETTA-MWSTMBEZ, sy-vline,
  WA_ETTA-BACKBI, sy-vline,
  WA_ETTA-NUMPERBB, sy-vline,
  WA_ETTA-PERENDBI, sy-vline,
  WA_ETTA-NUMPERPEB, sy-vline,
  WA_ETTA-DIFPBPEB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETTA 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_ETTA 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_ETTA INTO WA_ETTA.


*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 DYPERCON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ETTA-DYPERCON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETTA-DYPERCON.
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_ETTA_STR, 
MANDT TYPE STRING,
TARIFTYP TYPE STRING,
SPARTE TYPE STRING,
AKLASSE TYPE STRING,
GASABART TYPE STRING,
MWSTMBEZ TYPE STRING,
BACKBI TYPE STRING,
NUMPERBB TYPE STRING,
PERENDBI TYPE STRING,
NUMPERPEB TYPE STRING,
DIFPBPEB TYPE STRING,
AUSGRUP TYPE STRING,
SCHEMANR TYPE STRING,
HOCHART TYPE STRING,
VPERGRUP TYPE STRING,
PRUEFGR TYPE STRING,
ABSSTEU TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
ENDPRIO TYPE STRING,
STAGRUTTYP TYPE STRING,
BIADVANCE TYPE STRING,
DYPERCON TYPE STRING,
CONDBILLPROG TYPE STRING,
VISIBILITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETTA_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_ETTA_STR-MANDT sy-vline 
WA_ETTA_STR-TARIFTYP sy-vline 
WA_ETTA_STR-SPARTE sy-vline 
WA_ETTA_STR-AKLASSE sy-vline 
WA_ETTA_STR-GASABART sy-vline 
WA_ETTA_STR-MWSTMBEZ sy-vline 
WA_ETTA_STR-BACKBI sy-vline 
WA_ETTA_STR-NUMPERBB sy-vline 
WA_ETTA_STR-PERENDBI sy-vline 
WA_ETTA_STR-NUMPERPEB sy-vline 
WA_ETTA_STR-DIFPBPEB sy-vline 
WA_ETTA_STR-AUSGRUP sy-vline 
WA_ETTA_STR-SCHEMANR sy-vline 
WA_ETTA_STR-HOCHART sy-vline 
WA_ETTA_STR-VPERGRUP sy-vline 
WA_ETTA_STR-PRUEFGR sy-vline 
WA_ETTA_STR-ABSSTEU sy-vline 
WA_ETTA_STR-ERDAT sy-vline 
WA_ETTA_STR-ERNAM sy-vline 
WA_ETTA_STR-AEDAT sy-vline 
WA_ETTA_STR-AENAM sy-vline 
WA_ETTA_STR-BEGRU sy-vline 
WA_ETTA_STR-LOEVM sy-vline 
WA_ETTA_STR-ENDPRIO sy-vline 
WA_ETTA_STR-STAGRUTTYP sy-vline 
WA_ETTA_STR-BIADVANCE sy-vline 
WA_ETTA_STR-DYPERCON sy-vline 
WA_ETTA_STR-CONDBILLPROG sy-vline 
WA_ETTA_STR-VISIBILITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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