ABAP Select data from SAP table ETLOG_HIDX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETLOG_HIDX
*  INTO TABLE @DATA(IT_ETLOG_HIDX2).
*--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_ETLOG_HIDX INDEX 1 INTO DATA(WA_ETLOG_HIDX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETLOG_HIDX>-LOGID = 1.
<ETLOG_HIDX>-STARTUSER = 1.
<ETLOG_HIDX>-STARTDATE = 1.
<ETLOG_HIDX>-STARTTIME = 1.
<ETLOG_HIDX>-ENDDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETLOG_HIDX-ENDTIME, sy-vline,
  WA_ETLOG_HIDX-STATUS, sy-vline,
  WA_ETLOG_HIDX-EXPIRES, sy-vline,
  WA_ETLOG_HIDX-ANZABL, sy-vline,
  WA_ETLOG_HIDX-ANZPOS, sy-vline,
  WA_ETLOG_HIDX-ANZERR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETLOG_HIDX 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_ETLOG_HIDX 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_ETLOG_HIDX INTO WA_ETLOG_HIDX.


*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_ETLOG_HIDX_STR, 
LOGID TYPE STRING,
STARTUSER TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
STATUS TYPE STRING,
EXPIRES TYPE STRING,
ANZABL TYPE STRING,
ANZPOS TYPE STRING,
ANZERR TYPE STRING,
ANZINA TYPE STRING,
BISABL TYPE STRING,
VALID TYPE STRING,
OBJTEXT TYPE STRING,
INFO TYPE STRING,
SIZE_IN_KB TYPE STRING,
RUN_BACKGD TYPE STRING,
SIMU_2MODE TYPE STRING,
DEBUG_MODE TYPE STRING,
LOG_ONLINE TYPE STRING,
LONG_LOG TYPE STRING,
LOG_LIFE TYPE STRING,
ARCH_FLAG TYPE STRING,
PERFTRACE TYPE STRING,
FUNC TYPE STRING,
OBJECT TYPE STRING,
SOFTKOMP TYPE STRING,
OBJ_LNR TYPE STRING,
SCRIPT_LNR TYPE STRING,
TESTSYSTEM TYPE STRING,
SIGN TYPE STRING,
CALL_TYPE TYPE STRING,
CALLING_OBJ_DESC TYPE STRING,
CALLER_STARTDATE TYPE STRING,
CALLER_STARTTIME TYPE STRING,
LOG_FOUND TYPE STRING,
ARCH_FLAG_BEFORE TYPE STRING,
EXPIRES_BEFORE TYPE STRING,
MARK TYPE STRING,
DESTINATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETLOG_HIDX_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_ETLOG_HIDX_STR-LOGID sy-vline 
WA_ETLOG_HIDX_STR-STARTUSER sy-vline 
WA_ETLOG_HIDX_STR-STARTDATE sy-vline 
WA_ETLOG_HIDX_STR-STARTTIME sy-vline 
WA_ETLOG_HIDX_STR-ENDDATE sy-vline 
WA_ETLOG_HIDX_STR-ENDTIME sy-vline 
WA_ETLOG_HIDX_STR-STATUS sy-vline 
WA_ETLOG_HIDX_STR-EXPIRES sy-vline 
WA_ETLOG_HIDX_STR-ANZABL sy-vline 
WA_ETLOG_HIDX_STR-ANZPOS sy-vline 
WA_ETLOG_HIDX_STR-ANZERR sy-vline 
WA_ETLOG_HIDX_STR-ANZINA sy-vline 
WA_ETLOG_HIDX_STR-BISABL sy-vline 
WA_ETLOG_HIDX_STR-VALID sy-vline 
WA_ETLOG_HIDX_STR-OBJTEXT sy-vline 
WA_ETLOG_HIDX_STR-INFO sy-vline 
WA_ETLOG_HIDX_STR-SIZE_IN_KB sy-vline 
WA_ETLOG_HIDX_STR-RUN_BACKGD sy-vline 
WA_ETLOG_HIDX_STR-SIMU_2MODE sy-vline 
WA_ETLOG_HIDX_STR-DEBUG_MODE sy-vline 
WA_ETLOG_HIDX_STR-LOG_ONLINE sy-vline 
WA_ETLOG_HIDX_STR-LONG_LOG sy-vline 
WA_ETLOG_HIDX_STR-LOG_LIFE sy-vline 
WA_ETLOG_HIDX_STR-ARCH_FLAG sy-vline 
WA_ETLOG_HIDX_STR-PERFTRACE sy-vline 
WA_ETLOG_HIDX_STR-FUNC sy-vline 
WA_ETLOG_HIDX_STR-OBJECT sy-vline 
WA_ETLOG_HIDX_STR-SOFTKOMP sy-vline 
WA_ETLOG_HIDX_STR-OBJ_LNR sy-vline 
WA_ETLOG_HIDX_STR-SCRIPT_LNR sy-vline 
WA_ETLOG_HIDX_STR-TESTSYSTEM sy-vline 
WA_ETLOG_HIDX_STR-SIGN sy-vline 
WA_ETLOG_HIDX_STR-CALL_TYPE sy-vline 
WA_ETLOG_HIDX_STR-CALLING_OBJ_DESC sy-vline 
WA_ETLOG_HIDX_STR-CALLER_STARTDATE sy-vline 
WA_ETLOG_HIDX_STR-CALLER_STARTTIME sy-vline 
WA_ETLOG_HIDX_STR-LOG_FOUND sy-vline 
WA_ETLOG_HIDX_STR-ARCH_FLAG_BEFORE sy-vline 
WA_ETLOG_HIDX_STR-EXPIRES_BEFORE sy-vline 
WA_ETLOG_HIDX_STR-MARK sy-vline 
WA_ETLOG_HIDX_STR-DESTINATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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