ABAP Select data from SAP table ICTRACECRITERIA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICTRACECRITERIA
*  INTO TABLE @DATA(IT_ICTRACECRITERIA2).
*--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_ICTRACECRITERIA INDEX 1 INTO DATA(WA_ICTRACECRITERIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICTRACECRITERIA>-CLIENT = 1.
<ICTRACECRITERIA>-ID = 1.
<ICTRACECRITERIA>-VALID_UNTIL = 1.
<ICTRACECRITERIA>-TRC_LEVEL = 1.
<ICTRACECRITERIA>-CLIENT_IP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICTRACECRITERIA-PATH_PREFIX, sy-vline,
  WA_ICTRACECRITERIA-HOSTNAME, sy-vline,
  WA_ICTRACECRITERIA-METHOD, sy-vline,
  WA_ICTRACECRITERIA-CREATED_BY, sy-vline,
  WA_ICTRACECRITERIA-CREATION_DATE, sy-vline,
  WA_ICTRACECRITERIA-CREATION_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICTRACECRITERIA 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_ICTRACECRITERIA 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_ICTRACECRITERIA INTO WA_ICTRACECRITERIA.


*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.

*Conversion exit IPADD, internal->external for field CLIENT_IP
CALL FUNCTION 'CONVERSION_EXIT_IPADD_OUTPUT'
  EXPORTING
    input =                      WA_ICTRACECRITERIA-CLIENT_IP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICTRACECRITERIA-CLIENT_IP.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ICTRACECRITERIA_STR, 
CLIENT TYPE STRING,
ID TYPE STRING,
VALID_UNTIL TYPE STRING,
TRC_LEVEL TYPE STRING,
CLIENT_IP TYPE STRING,
PATH_PREFIX TYPE STRING,
HOSTNAME TYPE STRING,
METHOD TYPE STRING,
CREATED_BY TYPE STRING,
CREATION_DATE TYPE STRING,
CREATION_TIME TYPE STRING,
INCOMPLETE_MODE TYPE STRING,
TENANT_RESTRICTED TYPE STRING,
DESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICTRACECRITERIA_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_ICTRACECRITERIA_STR-CLIENT sy-vline 
WA_ICTRACECRITERIA_STR-ID sy-vline 
WA_ICTRACECRITERIA_STR-VALID_UNTIL sy-vline 
WA_ICTRACECRITERIA_STR-TRC_LEVEL sy-vline 
WA_ICTRACECRITERIA_STR-CLIENT_IP sy-vline 
WA_ICTRACECRITERIA_STR-PATH_PREFIX sy-vline 
WA_ICTRACECRITERIA_STR-HOSTNAME sy-vline 
WA_ICTRACECRITERIA_STR-METHOD sy-vline 
WA_ICTRACECRITERIA_STR-CREATED_BY sy-vline 
WA_ICTRACECRITERIA_STR-CREATION_DATE sy-vline 
WA_ICTRACECRITERIA_STR-CREATION_TIME sy-vline 
WA_ICTRACECRITERIA_STR-INCOMPLETE_MODE sy-vline 
WA_ICTRACECRITERIA_STR-TENANT_RESTRICTED sy-vline 
WA_ICTRACECRITERIA_STR-DESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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