ABAP Select data from SAP table ETOBJ_CNST 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 ETOBJ_CNST 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 ETOBJ_CNST. 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 ETOBJ_CNST 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_ETOBJ_CNST TYPE STANDARD TABLE OF ETOBJ_CNST,
      WA_ETOBJ_CNST TYPE ETOBJ_CNST,
      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: <ETOBJ_CNST> TYPE ETOBJ_CNST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETOBJ_CNST
*  INTO TABLE @DATA(IT_ETOBJ_CNST2).
*--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_ETOBJ_CNST INDEX 1 INTO DATA(WA_ETOBJ_CNST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETOBJ_CNST>-TWB_DEP_S = 1.
<ETOBJ_CNST>-TWB_DEPV_S = 1.
<ETOBJ_CNST>-TWB_DEP_L = 1.
<ETOBJ_CNST>-TWB_DEPV_L = 1.
<ETOBJ_CNST>-TWB_USE_A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETOBJ_CNST-TWB_USE_P, sy-vline,
  WA_ETOBJ_CNST-TWB_USE_H, sy-vline,
  WA_ETOBJ_CNST-TWB_USE_E, sy-vline,
  WA_ETOBJ_CNST-REUSE, sy-vline,
  WA_ETOBJ_CNST-TWB_DEP_C, sy-vline,
  WA_ETOBJ_CNST-TWB_DEP_VC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETOBJ_CNST 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_ETOBJ_CNST 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_ETOBJ_CNST INTO WA_ETOBJ_CNST.


*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 ISOLA, internal->external for field TWB_DEPV_S
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ETOBJ_CNST-TWB_DEPV_S
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETOBJ_CNST-TWB_DEPV_S.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TWB_WKUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ETOBJ_CNST-TWB_WKUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETOBJ_CNST-TWB_WKUNIT.
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_ETOBJ_CNST_STR, 
TWB_DEP_S TYPE STRING,
TWB_DEPV_S TYPE STRING,
TWB_DEP_L TYPE STRING,
TWB_DEPV_L TYPE STRING,
TWB_USE_A TYPE STRING,
TWB_USE_P TYPE STRING,
TWB_USE_H TYPE STRING,
TWB_USE_E TYPE STRING,
REUSE TYPE STRING,
TWB_DEP_C TYPE STRING,
TWB_DEP_VC TYPE STRING,
TWB_DEP_F TYPE STRING,
TWB_DEP_VF TYPE STRING,
TWB_DEP_P TYPE STRING,
TWB_DEP_VP TYPE STRING,
TWB_DEP_DB TYPE STRING,
TWB_DEPVDB TYPE STRING,
TWB_WKREQ TYPE STRING,
TWB_WKUNIT TYPE STRING,
TWB_PRIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETOBJ_CNST_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_ETOBJ_CNST_STR-TWB_DEP_S sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEPV_S sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_L sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEPV_L sy-vline 
WA_ETOBJ_CNST_STR-TWB_USE_A sy-vline 
WA_ETOBJ_CNST_STR-TWB_USE_P sy-vline 
WA_ETOBJ_CNST_STR-TWB_USE_H sy-vline 
WA_ETOBJ_CNST_STR-TWB_USE_E sy-vline 
WA_ETOBJ_CNST_STR-REUSE sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_C sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_VC sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_F sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_VF sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_P sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_VP sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEP_DB sy-vline 
WA_ETOBJ_CNST_STR-TWB_DEPVDB sy-vline 
WA_ETOBJ_CNST_STR-TWB_WKREQ sy-vline 
WA_ETOBJ_CNST_STR-TWB_WKUNIT sy-vline 
WA_ETOBJ_CNST_STR-TWB_PRIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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