ABAP Select data from SAP table TZRR_EVTC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TZRR_EVTC
*  INTO TABLE @DATA(IT_TZRR_EVTC2).
*--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_TZRR_EVTC INDEX 1 INTO DATA(WA_TZRR_EVTC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TZRR_EVTC>-RESULT_ID = 1.
<TZRR_EVTC>-EVENT_ID = 1.
<TZRR_EVTC>-TCNAME = 1.
<TZRR_EVTC>-TCVERSION = 1.
<TZRR_EVTC>-TCTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TZRR_EVTC-TCTITLE, sy-vline,
  WA_TZRR_EVTC-TARGETSYS, sy-vline,
  WA_TZRR_EVTC-DESTINATION, sy-vline,
  WA_TZRR_EVTC-STARTER, sy-vline,
  WA_TZRR_EVTC-LANGUAGE, sy-vline,
  WA_TZRR_EVTC-MANDANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TZRR_EVTC 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_TZRR_EVTC 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_TZRR_EVTC INTO WA_TZRR_EVTC.


*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_TZRR_EVTC_STR, 
RESULT_ID TYPE STRING,
EVENT_ID TYPE STRING,
TCNAME TYPE STRING,
TCVERSION TYPE STRING,
TCTYPE TYPE STRING,
TCTITLE TYPE STRING,
TARGETSYS TYPE STRING,
DESTINATION TYPE STRING,
STARTER TYPE STRING,
LANGUAGE TYPE STRING,
MANDANT TYPE STRING,
HOST TYPE STRING,
OS TYPE STRING,
DB TYPE STRING,
COMPONENTS TYPE STRING,
STARTPROFIL TYPE STRING,
XML_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TZRR_EVTC_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_TZRR_EVTC_STR-RESULT_ID sy-vline 
WA_TZRR_EVTC_STR-EVENT_ID sy-vline 
WA_TZRR_EVTC_STR-TCNAME sy-vline 
WA_TZRR_EVTC_STR-TCVERSION sy-vline 
WA_TZRR_EVTC_STR-TCTYPE sy-vline 
WA_TZRR_EVTC_STR-TCTITLE sy-vline 
WA_TZRR_EVTC_STR-TARGETSYS sy-vline 
WA_TZRR_EVTC_STR-DESTINATION sy-vline 
WA_TZRR_EVTC_STR-STARTER sy-vline 
WA_TZRR_EVTC_STR-LANGUAGE sy-vline 
WA_TZRR_EVTC_STR-MANDANT sy-vline 
WA_TZRR_EVTC_STR-HOST sy-vline 
WA_TZRR_EVTC_STR-OS sy-vline 
WA_TZRR_EVTC_STR-DB sy-vline 
WA_TZRR_EVTC_STR-COMPONENTS sy-vline 
WA_TZRR_EVTC_STR-STARTPROFIL sy-vline 
WA_TZRR_EVTC_STR-XML_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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