ABAP Select data from SAP table PVCHTRENTPAR into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PVCHTRENTPAR 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 PVCHTRENTPAR. 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 PVCHTRENTPAR 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_PVCHTRENTPAR TYPE STANDARD TABLE OF PVCHTRENTPAR,
      WA_PVCHTRENTPAR TYPE PVCHTRENTPAR,
      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: <PVCHTRENTPAR> TYPE PVCHTRENTPAR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PVCHTRENTPAR
*  INTO TABLE @DATA(IT_PVCHTRENTPAR2).
*--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_PVCHTRENTPAR INDEX 1 INTO DATA(WA_PVCHTRENTPAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PVCHTRENTPAR>-MANDT = 1.
<PVCHTRENTPAR>-TRACE_GUID = 1.
<PVCHTRENTPAR>-ROUNDTRIP_NO = 1.
<PVCHTRENTPAR>-ENTRY_NO = 1.
<PVCHTRENTPAR>-PARAMETER_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PVCHTRENTPAR-PARAMETER_VALUE, sy-vline,
  WA_PVCHTRENTPAR-REFERENCED_OBJECT_TYPE, sy-vline,
  WA_PVCHTRENTPAR-IO_TYPE, sy-vline,
  WA_PVCHTRENTPAR-VIEW_RELEVANCE, sy-vline,
  WA_PVCHTRENTPAR-DEPENDENCY_ID, sy-vline,
  WA_PVCHTRENTPAR-DEPENDENCY_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PVCHTRENTPAR 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_PVCHTRENTPAR 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_PVCHTRENTPAR INTO WA_PVCHTRENTPAR.


*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_PVCHTRENTPAR_STR, 
MANDT TYPE STRING,
TRACE_GUID TYPE STRING,
ROUNDTRIP_NO TYPE STRING,
ENTRY_NO TYPE STRING,
PARAMETER_NO TYPE STRING,
PARAMETER_VALUE TYPE STRING,
REFERENCED_OBJECT_TYPE TYPE STRING,
IO_TYPE TYPE STRING,
VIEW_RELEVANCE TYPE STRING,
DEPENDENCY_ID TYPE STRING,
DEPENDENCY_NAME TYPE STRING,
SUBPROCEDURE_INDEX TYPE STRING,
DEPENDENCY_OBJECT_ID TYPE STRING,
DEPENDENCY_RESULT_TYPE_TEXT TYPE STRING,
DEPENDENCY_RESULT_VALUE_TEXT TYPE STRING,
CSTIC_ID TYPE STRING,
CSTIC_NAME TYPE STRING,
VALUE_ID TYPE STRING,
VALUE_FROM_AS_STRING TYPE STRING,
VALUE_TO_AS_STRING TYPE STRING,
VALUE_DATA_TYPE TYPE STRING,
INTERVAL_TYPE TYPE STRING,
CSTIC_VALUE_CLASSIFIER TYPE STRING,
INSTANCE_ID TYPE STRING,
VARIANT_CONDITION_VALUE TYPE STRING,
CSTIC_RESULT_TYPE TYPE STRING,
CSTIC_RESULT_TYPE_TEXT TYPE STRING,
VARIANT_TABLE_ID TYPE STRING,
VARIANT_TABLE_NAME TYPE STRING,
BADI_NAME TYPE STRING,
BADI_IMPLEMENTATION_NAME TYPE STRING,
MESSAGE_TYPE TYPE STRING,
MESSAGE_CLASS TYPE STRING,
MESSAGE_NUMBER TYPE STRING,
MESSAGE_VARIABLE_1 TYPE STRING,
MESSAGE_VARIABLE_2 TYPE STRING,
MESSAGE_VARIABLE_3 TYPE STRING,
MESSAGE_VARIABLE_4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PVCHTRENTPAR_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_PVCHTRENTPAR_STR-MANDT sy-vline 
WA_PVCHTRENTPAR_STR-TRACE_GUID sy-vline 
WA_PVCHTRENTPAR_STR-ROUNDTRIP_NO sy-vline 
WA_PVCHTRENTPAR_STR-ENTRY_NO sy-vline 
WA_PVCHTRENTPAR_STR-PARAMETER_NO sy-vline 
WA_PVCHTRENTPAR_STR-PARAMETER_VALUE sy-vline 
WA_PVCHTRENTPAR_STR-REFERENCED_OBJECT_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-IO_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-VIEW_RELEVANCE sy-vline 
WA_PVCHTRENTPAR_STR-DEPENDENCY_ID sy-vline 
WA_PVCHTRENTPAR_STR-DEPENDENCY_NAME sy-vline 
WA_PVCHTRENTPAR_STR-SUBPROCEDURE_INDEX sy-vline 
WA_PVCHTRENTPAR_STR-DEPENDENCY_OBJECT_ID sy-vline 
WA_PVCHTRENTPAR_STR-DEPENDENCY_RESULT_TYPE_TEXT sy-vline 
WA_PVCHTRENTPAR_STR-DEPENDENCY_RESULT_VALUE_TEXT sy-vline 
WA_PVCHTRENTPAR_STR-CSTIC_ID sy-vline 
WA_PVCHTRENTPAR_STR-CSTIC_NAME sy-vline 
WA_PVCHTRENTPAR_STR-VALUE_ID sy-vline 
WA_PVCHTRENTPAR_STR-VALUE_FROM_AS_STRING sy-vline 
WA_PVCHTRENTPAR_STR-VALUE_TO_AS_STRING sy-vline 
WA_PVCHTRENTPAR_STR-VALUE_DATA_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-INTERVAL_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-CSTIC_VALUE_CLASSIFIER sy-vline 
WA_PVCHTRENTPAR_STR-INSTANCE_ID sy-vline 
WA_PVCHTRENTPAR_STR-VARIANT_CONDITION_VALUE sy-vline 
WA_PVCHTRENTPAR_STR-CSTIC_RESULT_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-CSTIC_RESULT_TYPE_TEXT sy-vline 
WA_PVCHTRENTPAR_STR-VARIANT_TABLE_ID sy-vline 
WA_PVCHTRENTPAR_STR-VARIANT_TABLE_NAME sy-vline 
WA_PVCHTRENTPAR_STR-BADI_NAME sy-vline 
WA_PVCHTRENTPAR_STR-BADI_IMPLEMENTATION_NAME sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_TYPE sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_CLASS sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_NUMBER sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_VARIABLE_1 sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_VARIABLE_2 sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_VARIABLE_3 sy-vline 
WA_PVCHTRENTPAR_STR-MESSAGE_VARIABLE_4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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