ABAP Select data from SAP table INDX_ESS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INDX_ESS
*  INTO TABLE @DATA(IT_INDX_ESS2).
*--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_INDX_ESS INDEX 1 INTO DATA(WA_INDX_ESS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INDX_ESS>-MANDT = 1.
<INDX_ESS>-RELID = 1.
<INDX_ESS>-SRTFD = 1.
<INDX_ESS>-SRTF2 = 1.
<INDX_ESS>-LOEKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INDX_ESS-SPERR, sy-vline,
  WA_INDX_ESS-AEDAT, sy-vline,
  WA_INDX_ESS-USERA, sy-vline,
  WA_INDX_ESS-PGMID, sy-vline,
  WA_INDX_ESS-BEGDT, sy-vline,
  WA_INDX_ESS-ENDDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INDX_ESS 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_INDX_ESS 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_INDX_ESS INTO WA_INDX_ESS.


*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_INDX_ESS_STR, 
MANDT TYPE STRING,
RELID TYPE STRING,
SRTFD TYPE STRING,
SRTF2 TYPE STRING,
LOEKZ TYPE STRING,
SPERR TYPE STRING,
AEDAT TYPE STRING,
USERA TYPE STRING,
PGMID TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INDX_ESS_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_INDX_ESS_STR-MANDT sy-vline 
WA_INDX_ESS_STR-RELID sy-vline 
WA_INDX_ESS_STR-SRTFD sy-vline 
WA_INDX_ESS_STR-SRTF2 sy-vline 
WA_INDX_ESS_STR-LOEKZ sy-vline 
WA_INDX_ESS_STR-SPERR sy-vline 
WA_INDX_ESS_STR-AEDAT sy-vline 
WA_INDX_ESS_STR-USERA sy-vline 
WA_INDX_ESS_STR-PGMID sy-vline 
WA_INDX_ESS_STR-BEGDT sy-vline 
WA_INDX_ESS_STR-ENDDT sy-vline 
WA_INDX_ESS_STR-CLUSTR sy-vline 
WA_INDX_ESS_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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