ABAP Select data from SAP table ETLOG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ETLOG 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. 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 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 TYPE STANDARD TABLE OF ETLOG,
      WA_ETLOG TYPE ETLOG,
      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> TYPE ETLOG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETLOG
*  INTO TABLE @DATA(IT_ETLOG2).
*--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 INDEX 1 INTO DATA(WA_ETLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETLOG>-BLOCK_PTR = 1.
<ETLOG>-VDATA_PTR = 1.
<ETLOG>-SDATA_PTR = 1.
<ETLOG>-CONFG_PTR = 1.
<ETLOG>-MOD_LNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETLOG-OBJ_LNR, sy-vline,
  WA_ETLOG-SCR_LNR, sy-vline,
  WA_ETLOG-EXPAND, sy-vline,
  WA_ETLOG-ERRCD, sy-vline,
  WA_ETLOG-CNDCD, sy-vline,
  WA_ETLOG-EXDATA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETLOG 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 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 INTO WA_ETLOG.


*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_STR, 
BLOCK_PTR TYPE STRING,
VDATA_PTR TYPE STRING,
SDATA_PTR TYPE STRING,
CONFG_PTR TYPE STRING,
MOD_LNR TYPE STRING,
OBJ_LNR TYPE STRING,
SCR_LNR TYPE STRING,
EXPAND TYPE STRING,
ERRCD TYPE STRING,
CNDCD TYPE STRING,
EXDATA TYPE STRING,
LEVL TYPE STRING,
A_FUNC TYPE STRING,
A_OBJ TYPE STRING,
A_PAR TYPE STRING,
A_CMP TYPE STRING,
A_PATH TYPE STRING,
A_DEST TYPE STRING,
OBJTEXT TYPE STRING,
CONTI TYPE STRING,
SCRIPT TYPE STRING,
VALUE TYPE STRING,
ECOBJ_PTR TYPE STRING,
ECOBJ_PAR_PTR TYPE STRING,
A_CMD_LIN TYPE STRING,
A_CMD_COL TYPE STRING,
PARAMS TYPE STRING,
ONGOING TYPE STRING,
PARENT TYPE STRING,
START_TIME TYPE STRING,
BLOCK_TIME TYPE STRING,
CMD_TIME TYPE STRING,
RFC_TIME TYPE STRING,
SUT_TIME TYPE STRING,
VAL_TAB TYPE STRING,
SCR_EXPAND TYPE STRING,
SCR_ERRCD TYPE STRING,
SCR_CNDCD TYPE STRING,
SCR_EXDATA TYPE STRING,
SCR_LEVEL TYPE STRING,
FUNC TYPE STRING,
OBJECT TYPE STRING,
PARAM_ID TYPE STRING,
SOFTKOMP TYPE STRING,
PATH TYPE STRING,
DEST TYPE STRING,
CMD_LIN TYPE STRING,
CMD_COL TYPE STRING,
STIM TYPE STRING,
RUNTIME TYPE STRING,
CMDTIME TYPE STRING,
RFCTIME TYPE STRING,
SUTTIME TYPE STRING,
SLOG_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETLOG_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_STR-BLOCK_PTR sy-vline 
WA_ETLOG_STR-VDATA_PTR sy-vline 
WA_ETLOG_STR-SDATA_PTR sy-vline 
WA_ETLOG_STR-CONFG_PTR sy-vline 
WA_ETLOG_STR-MOD_LNR sy-vline 
WA_ETLOG_STR-OBJ_LNR sy-vline 
WA_ETLOG_STR-SCR_LNR sy-vline 
WA_ETLOG_STR-EXPAND sy-vline 
WA_ETLOG_STR-ERRCD sy-vline 
WA_ETLOG_STR-CNDCD sy-vline 
WA_ETLOG_STR-EXDATA sy-vline 
WA_ETLOG_STR-LEVL sy-vline 
WA_ETLOG_STR-A_FUNC sy-vline 
WA_ETLOG_STR-A_OBJ sy-vline 
WA_ETLOG_STR-A_PAR sy-vline 
WA_ETLOG_STR-A_CMP sy-vline 
WA_ETLOG_STR-A_PATH sy-vline 
WA_ETLOG_STR-A_DEST sy-vline 
WA_ETLOG_STR-OBJTEXT sy-vline 
WA_ETLOG_STR-CONTI sy-vline 
WA_ETLOG_STR-SCRIPT sy-vline 
WA_ETLOG_STR-VALUE sy-vline 
WA_ETLOG_STR-ECOBJ_PTR sy-vline 
WA_ETLOG_STR-ECOBJ_PAR_PTR sy-vline 
WA_ETLOG_STR-A_CMD_LIN sy-vline 
WA_ETLOG_STR-A_CMD_COL sy-vline 
WA_ETLOG_STR-PARAMS sy-vline 
WA_ETLOG_STR-ONGOING sy-vline 
WA_ETLOG_STR-PARENT sy-vline 
WA_ETLOG_STR-START_TIME sy-vline 
WA_ETLOG_STR-BLOCK_TIME sy-vline 
WA_ETLOG_STR-CMD_TIME sy-vline 
WA_ETLOG_STR-RFC_TIME sy-vline 
WA_ETLOG_STR-SUT_TIME sy-vline 
WA_ETLOG_STR-VAL_TAB sy-vline 
WA_ETLOG_STR-SCR_EXPAND sy-vline 
WA_ETLOG_STR-SCR_ERRCD sy-vline 
WA_ETLOG_STR-SCR_CNDCD sy-vline 
WA_ETLOG_STR-SCR_EXDATA sy-vline 
WA_ETLOG_STR-SCR_LEVEL sy-vline 
WA_ETLOG_STR-FUNC sy-vline 
WA_ETLOG_STR-OBJECT sy-vline 
WA_ETLOG_STR-PARAM_ID sy-vline 
WA_ETLOG_STR-SOFTKOMP sy-vline 
WA_ETLOG_STR-PATH sy-vline 
WA_ETLOG_STR-DEST sy-vline 
WA_ETLOG_STR-CMD_LIN sy-vline 
WA_ETLOG_STR-CMD_COL sy-vline 
WA_ETLOG_STR-STIM sy-vline 
WA_ETLOG_STR-RUNTIME sy-vline 
WA_ETLOG_STR-CMDTIME sy-vline 
WA_ETLOG_STR-RFCTIME sy-vline 
WA_ETLOG_STR-SUTTIME sy-vline 
WA_ETLOG_STR-SLOG_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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