ABAP Select data from SAP table ECOMPDEFN_OBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ECOMPDEFN_OBJ
*  INTO TABLE @DATA(IT_ECOMPDEFN_OBJ2).
*--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_ECOMPDEFN_OBJ INDEX 1 INTO DATA(WA_ECOMPDEFN_OBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ECOMPDEFN_OBJ>-DATA = 1.
<ECOMPDEFN_OBJ>-HEAD = 1.
<ECOMPDEFN_OBJ>-MANDT = 1.
<ECOMPDEFN_OBJ>-RTPCOMP = 1.
<ECOMPDEFN_OBJ>-SEASONBLOCK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ECOMPDEFN_OBJ-DAYTYPEBLOCK, sy-vline,
  WA_ECOMPDEFN_OBJ-TOUBLOCK, sy-vline,
  WA_ECOMPDEFN_OBJ-RTPCOMPTEXT, sy-vline,
  WA_ECOMPDEFN_OBJ-BRANCH, sy-vline,
  WA_ECOMPDEFN_OBJ-DB, sy-vline,
  WA_ECOMPDEFN_OBJ-HEAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ECOMPDEFN_OBJ 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_ECOMPDEFN_OBJ 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_ECOMPDEFN_OBJ INTO WA_ECOMPDEFN_OBJ.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ECOMPDEFN_OBJ_STR, 
DATA TYPE STRING,
HEAD TYPE STRING,
MANDT TYPE STRING,
RTPCOMP TYPE STRING,
SEASONBLOCK TYPE STRING,
DAYTYPEBLOCK TYPE STRING,
TOUBLOCK TYPE STRING,
RTPCOMPTEXT TYPE STRING,
BRANCH TYPE STRING,
DB TYPE STRING,
HEAD TYPE STRING,
MANDT TYPE STRING,
RTPCOMP TYPE STRING,
SEASONBLOCK TYPE STRING,
DAYTYPEBLOCK TYPE STRING,
TOUBLOCK TYPE STRING,
RTPCOMPTEXT TYPE STRING,
BRANCH TYPE STRING,
SCREEN TYPE STRING,
COMP TYPE STRING,
MANDT TYPE STRING,
RTPCOMP TYPE STRING,
RTPCOMPTEXT TYPE STRING,
NODECAT TYPE STRING,
NODE TYPE STRING,
BLOCKCAT TYPE STRING,
BLOCK TYPE STRING,
SEASON TYPE STRING,
RTPCOMP_REF TYPE STRING,
TCOMP TYPE STRING,
CONTR TYPE STRING,
G_NODE_KEY TYPE STRING,
TS_PROGRAM_ID TYPE STRING,
TS_DYNPRO TYPE STRING,
WMODE TYPE STRING,
OPEN_WMODE TYPE STRING,
UPD_ONLINE TYPE STRING,
NO_DIALOG TYPE STRING,
NUM_RANGE TYPE STRING,
NO_CHANGE TYPE STRING,
NO_OTHER TYPE STRING,
NO_EVENT TYPE STRING,
NO_STATISTIC TYPE STRING,
NO_CHANGE_DOC TYPE STRING,
CALLED_BY_IDOC TYPE STRING,
PROPRICE TYPE STRING,
INPERR TYPE STRING,
ENQ_DONE TYPE STRING,
CURFIELD TYPE STRING,
CURLINE TYPE STRING,
CURDYNNR TYPE STRING,
SETCURFIELD TYPE STRING,
SETCURLINE TYPE STRING,
SETCURDYNNR TYPE STRING,
TEXT_CHANGED TYPE STRING,
EXTINTKZ TYPE STRING,
EXIT_TYPE TYPE STRING,
FULLSCREEN TYPE STRING,
SAVE_OKCODE TYPE STRING,
TEILOBJ TYPE STRING,
S_FUBA TYPE STRING,
INPUT_FIELD_OFF TYPE STRING,
NOFULLSCREEN TYPE STRING,
DB_UPDATE TYPE STRING,
CHANGEFLAG TYPE STRING,
WA_ADR_DONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ECOMPDEFN_OBJ_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_ECOMPDEFN_OBJ_STR-DATA sy-vline 
WA_ECOMPDEFN_OBJ_STR-HEAD sy-vline 
WA_ECOMPDEFN_OBJ_STR-MANDT sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMP sy-vline 
WA_ECOMPDEFN_OBJ_STR-SEASONBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-DAYTYPEBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-TOUBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMPTEXT sy-vline 
WA_ECOMPDEFN_OBJ_STR-BRANCH sy-vline 
WA_ECOMPDEFN_OBJ_STR-DB sy-vline 
WA_ECOMPDEFN_OBJ_STR-HEAD sy-vline 
WA_ECOMPDEFN_OBJ_STR-MANDT sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMP sy-vline 
WA_ECOMPDEFN_OBJ_STR-SEASONBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-DAYTYPEBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-TOUBLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMPTEXT sy-vline 
WA_ECOMPDEFN_OBJ_STR-BRANCH sy-vline 
WA_ECOMPDEFN_OBJ_STR-SCREEN sy-vline 
WA_ECOMPDEFN_OBJ_STR-COMP sy-vline 
WA_ECOMPDEFN_OBJ_STR-MANDT sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMP sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMPTEXT sy-vline 
WA_ECOMPDEFN_OBJ_STR-NODECAT sy-vline 
WA_ECOMPDEFN_OBJ_STR-NODE sy-vline 
WA_ECOMPDEFN_OBJ_STR-BLOCKCAT sy-vline 
WA_ECOMPDEFN_OBJ_STR-BLOCK sy-vline 
WA_ECOMPDEFN_OBJ_STR-SEASON sy-vline 
WA_ECOMPDEFN_OBJ_STR-RTPCOMP_REF sy-vline 
WA_ECOMPDEFN_OBJ_STR-TCOMP sy-vline 
WA_ECOMPDEFN_OBJ_STR-CONTR sy-vline 
WA_ECOMPDEFN_OBJ_STR-G_NODE_KEY sy-vline 
WA_ECOMPDEFN_OBJ_STR-TS_PROGRAM_ID sy-vline 
WA_ECOMPDEFN_OBJ_STR-TS_DYNPRO sy-vline 
WA_ECOMPDEFN_OBJ_STR-WMODE sy-vline 
WA_ECOMPDEFN_OBJ_STR-OPEN_WMODE sy-vline 
WA_ECOMPDEFN_OBJ_STR-UPD_ONLINE sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_DIALOG sy-vline 
WA_ECOMPDEFN_OBJ_STR-NUM_RANGE sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_CHANGE sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_OTHER sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_EVENT sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_STATISTIC sy-vline 
WA_ECOMPDEFN_OBJ_STR-NO_CHANGE_DOC sy-vline 
WA_ECOMPDEFN_OBJ_STR-CALLED_BY_IDOC sy-vline 
WA_ECOMPDEFN_OBJ_STR-PROPRICE sy-vline 
WA_ECOMPDEFN_OBJ_STR-INPERR sy-vline 
WA_ECOMPDEFN_OBJ_STR-ENQ_DONE sy-vline 
WA_ECOMPDEFN_OBJ_STR-CURFIELD sy-vline 
WA_ECOMPDEFN_OBJ_STR-CURLINE sy-vline 
WA_ECOMPDEFN_OBJ_STR-CURDYNNR sy-vline 
WA_ECOMPDEFN_OBJ_STR-SETCURFIELD sy-vline 
WA_ECOMPDEFN_OBJ_STR-SETCURLINE sy-vline 
WA_ECOMPDEFN_OBJ_STR-SETCURDYNNR sy-vline 
WA_ECOMPDEFN_OBJ_STR-TEXT_CHANGED sy-vline 
WA_ECOMPDEFN_OBJ_STR-EXTINTKZ sy-vline 
WA_ECOMPDEFN_OBJ_STR-EXIT_TYPE sy-vline 
WA_ECOMPDEFN_OBJ_STR-FULLSCREEN sy-vline 
WA_ECOMPDEFN_OBJ_STR-SAVE_OKCODE sy-vline 
WA_ECOMPDEFN_OBJ_STR-TEILOBJ sy-vline 
WA_ECOMPDEFN_OBJ_STR-S_FUBA sy-vline 
WA_ECOMPDEFN_OBJ_STR-INPUT_FIELD_OFF sy-vline 
WA_ECOMPDEFN_OBJ_STR-NOFULLSCREEN sy-vline 
WA_ECOMPDEFN_OBJ_STR-DB_UPDATE sy-vline 
WA_ECOMPDEFN_OBJ_STR-CHANGEFLAG sy-vline 
WA_ECOMPDEFN_OBJ_STR-WA_ADR_DONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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