ABAP Select data from SAP table HRSEN12_LOGFILE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRSEN12_LOGFILE 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 HRSEN12_LOGFILE. 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 HRSEN12_LOGFILE 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_HRSEN12_LOGFILE TYPE STANDARD TABLE OF HRSEN12_LOGFILE,
      WA_HRSEN12_LOGFILE TYPE HRSEN12_LOGFILE,
      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: <HRSEN12_LOGFILE> TYPE HRSEN12_LOGFILE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRSEN12_LOGFILE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRSEN12_LOGFILE
  INTO TABLE IT_HRSEN12_LOGFILE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRSEN12_LOGFILE
*  INTO TABLE @DATA(IT_HRSEN12_LOGFILE2).
*--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_HRSEN12_LOGFILE INDEX 1 INTO DATA(WA_HRSEN12_LOGFILE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRSEN12_LOGFILE ASSIGNING <HRSEN12_LOGFILE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRSEN12_LOGFILE>-PERNR = 1.
<HRSEN12_LOGFILE>-NAME = 1.
<HRSEN12_LOGFILE>-FNAME = 1.
<HRSEN12_LOGFILE>-TYPE = 1.
<HRSEN12_LOGFILE>-REFDATE = 1.

ENDLOOP.

LOOP AT IT_HRSEN12_LOGFILE INTO WA_HRSEN12_LOGFILE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRSEN12_LOGFILE-STARTDATE, sy-vline,
  WA_HRSEN12_LOGFILE-ENDDATE, sy-vline,
  WA_HRSEN12_LOGFILE-AWART, sy-vline,
  WA_HRSEN12_LOGFILE-BUTXT, sy-vline,
  WA_HRSEN12_LOGFILE-GRADE, sy-vline,
  WA_HRSEN12_LOGFILE-PTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRSEN12_LOGFILE 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_HRSEN12_LOGFILE 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_HRSEN12_LOGFILE INTO WA_HRSEN12_LOGFILE.


*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_HRSEN12_LOGFILE_STR, 
PERNR TYPE STRING,
NAME TYPE STRING,
FNAME TYPE STRING,
TYPE TYPE STRING,
REFDATE TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
AWART TYPE STRING,
BUTXT TYPE STRING,
GRADE TYPE STRING,
PTEXT TYPE STRING,
PRCT TYPE STRING,
LVL TYPE STRING,
CALYY TYPE STRING,
CALMM TYPE STRING,
SENPRCT TYPE STRING,
CPLTXT TYPE STRING,
PERNR0031 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRSEN12_LOGFILE_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_HRSEN12_LOGFILE_STR-PERNR sy-vline 
WA_HRSEN12_LOGFILE_STR-NAME sy-vline 
WA_HRSEN12_LOGFILE_STR-FNAME sy-vline 
WA_HRSEN12_LOGFILE_STR-TYPE sy-vline 
WA_HRSEN12_LOGFILE_STR-REFDATE sy-vline 
WA_HRSEN12_LOGFILE_STR-STARTDATE sy-vline 
WA_HRSEN12_LOGFILE_STR-ENDDATE sy-vline 
WA_HRSEN12_LOGFILE_STR-AWART sy-vline 
WA_HRSEN12_LOGFILE_STR-BUTXT sy-vline 
WA_HRSEN12_LOGFILE_STR-GRADE sy-vline 
WA_HRSEN12_LOGFILE_STR-PTEXT sy-vline 
WA_HRSEN12_LOGFILE_STR-PRCT sy-vline 
WA_HRSEN12_LOGFILE_STR-LVL sy-vline 
WA_HRSEN12_LOGFILE_STR-CALYY sy-vline 
WA_HRSEN12_LOGFILE_STR-CALMM sy-vline 
WA_HRSEN12_LOGFILE_STR-SENPRCT sy-vline 
WA_HRSEN12_LOGFILE_STR-CPLTXT sy-vline 
WA_HRSEN12_LOGFILE_STR-PERNR0031 sy-vline      INTO ld_text SEPARATED BY SPACE.

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