ABAP Select data from SAP table TRCPAT2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TRCPAT2 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 TRCPAT2. 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 TRCPAT2 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_TRCPAT2 TYPE STANDARD TABLE OF TRCPAT2,
      WA_TRCPAT2 TYPE TRCPAT2,
      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: <TRCPAT2> TYPE TRCPAT2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TRCPAT2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TRCPAT2
  INTO TABLE IT_TRCPAT2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRCPAT2
*  INTO TABLE @DATA(IT_TRCPAT22).
*--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_TRCPAT2 INDEX 1 INTO DATA(WA_TRCPAT22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TRCPAT2 ASSIGNING <TRCPAT2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRCPAT2>-MANDT = 1.
<TRCPAT2>-KEYUUID = 1.
<TRCPAT2>-BEARER_CAT = 1.
<TRCPAT2>-BEARER_ID = 1.
<TRCPAT2>-CASHFLOW_ID = 1.

ENDLOOP.

LOOP AT IT_TRCPAT2 INTO WA_TRCPAT2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRCPAT2-IRA_DATE, sy-vline,
  WA_TRCPAT2-DCSID, sy-vline,
  WA_TRCPAT2-MIC, sy-vline,
  WA_TRCPAT2-PRICETYPE, sy-vline,
  WA_TRCPAT2-TIME_TO_MATURITY, sy-vline,
  WA_TRCPAT2-TIMING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRCPAT2 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_TRCPAT2 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_TRCPAT2 INTO WA_TRCPAT2.


*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 CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TRCPAT2-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRCPAT2-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CPE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TRCPAT2-CPE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRCPAT2-CPE_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field EXCHRATE_DIR
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_TRCPAT2-EXCHRATE_DIR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRCPAT2-EXCHRATE_DIR.
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_TRCPAT2_STR, 
MANDT TYPE STRING,
KEYUUID TYPE STRING,
BEARER_CAT TYPE STRING,
BEARER_ID TYPE STRING,
CASHFLOW_ID TYPE STRING,
IRA_DATE TYPE STRING,
DCSID TYPE STRING,
MIC TYPE STRING,
PRICETYPE TYPE STRING,
TIME_TO_MATURITY TYPE STRING,
TIMING TYPE STRING,
PRICE TYPE STRING,
UOM TYPE STRING,
CPE_UOM TYPE STRING,
CURRENCY TYPE STRING,
RATETYPE TYPE STRING,
CURRENCYFROM TYPE STRING,
CURRENCYTO TYPE STRING,
EXCHRATE_DIR TYPE STRING,
REGI_STATE TYPE STRING,
TERM_FROM TYPE STRING,
IRA_TRIGGER TYPE STRING,
FIXER_NAME TYPE STRING,
FIXING_DATE TYPE STRING,
FIXING_TIME TYPE STRING,
ACTIVITY_STATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRCPAT2_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_TRCPAT2_STR-MANDT sy-vline 
WA_TRCPAT2_STR-KEYUUID sy-vline 
WA_TRCPAT2_STR-BEARER_CAT sy-vline 
WA_TRCPAT2_STR-BEARER_ID sy-vline 
WA_TRCPAT2_STR-CASHFLOW_ID sy-vline 
WA_TRCPAT2_STR-IRA_DATE sy-vline 
WA_TRCPAT2_STR-DCSID sy-vline 
WA_TRCPAT2_STR-MIC sy-vline 
WA_TRCPAT2_STR-PRICETYPE sy-vline 
WA_TRCPAT2_STR-TIME_TO_MATURITY sy-vline 
WA_TRCPAT2_STR-TIMING sy-vline 
WA_TRCPAT2_STR-PRICE sy-vline 
WA_TRCPAT2_STR-UOM sy-vline 
WA_TRCPAT2_STR-CPE_UOM sy-vline 
WA_TRCPAT2_STR-CURRENCY sy-vline 
WA_TRCPAT2_STR-RATETYPE sy-vline 
WA_TRCPAT2_STR-CURRENCYFROM sy-vline 
WA_TRCPAT2_STR-CURRENCYTO sy-vline 
WA_TRCPAT2_STR-EXCHRATE_DIR sy-vline 
WA_TRCPAT2_STR-REGI_STATE sy-vline 
WA_TRCPAT2_STR-TERM_FROM sy-vline 
WA_TRCPAT2_STR-IRA_TRIGGER sy-vline 
WA_TRCPAT2_STR-FIXER_NAME sy-vline 
WA_TRCPAT2_STR-FIXING_DATE sy-vline 
WA_TRCPAT2_STR-FIXING_TIME sy-vline 
WA_TRCPAT2_STR-ACTIVITY_STATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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