ABAP Select data from SAP table TISSR_GP_CHANGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TISSR_GP_CHANGE
*  INTO TABLE @DATA(IT_TISSR_GP_CHANGE2).
*--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_TISSR_GP_CHANGE INDEX 1 INTO DATA(WA_TISSR_GP_CHANGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TISSR_GP_CHANGE>-MANDANT = 1.
<TISSR_GP_CHANGE>-ASSET_NR = 1.
<TISSR_GP_CHANGE>-RANTYP = 1.
<TISSR_GP_CHANGE>-BUKRS = 1.
<TISSR_GP_CHANGE>-CHANGENR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TISSR_GP_CHANGE-OBJECTCLAS, sy-vline,
  WA_TISSR_GP_CHANGE-OBJECTID, sy-vline,
  WA_TISSR_GP_CHANGE-TABNAME, sy-vline,
  WA_TISSR_GP_CHANGE-TABKEY, sy-vline,
  WA_TISSR_GP_CHANGE-FNAME, sy-vline,
  WA_TISSR_GP_CHANGE-CHNGIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TISSR_GP_CHANGE 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_TISSR_GP_CHANGE 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_TISSR_GP_CHANGE INTO WA_TISSR_GP_CHANGE.


*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 ALPHA, internal->external for field ASSET_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TISSR_GP_CHANGE-ASSET_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TISSR_GP_CHANGE-ASSET_NR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGENR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TISSR_GP_CHANGE-CHANGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TISSR_GP_CHANGE-CHANGENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OBJECTCLAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TISSR_GP_CHANGE-OBJECTCLAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TISSR_GP_CHANGE-OBJECTCLAS.
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_TISSR_GP_CHANGE_STR, 
MANDANT TYPE STRING,
ASSET_NR TYPE STRING,
RANTYP TYPE STRING,
BUKRS TYPE STRING,
CHANGENR TYPE STRING,
OBJECTCLAS TYPE STRING,
OBJECTID TYPE STRING,
TABNAME TYPE STRING,
TABKEY TYPE STRING,
FNAME TYPE STRING,
CHNGIND TYPE STRING,
VALUE_NEW TYPE STRING,
VALUE_OLD TYPE STRING,
VALID_OLD TYPE STRING,
VALID_NEW TYPE STRING,
OLD_DGUEL_AB TYPE STRING,
NEW_DGUEL_BIS TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
USERNAME TYPE STRING,
REASON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TISSR_GP_CHANGE_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_TISSR_GP_CHANGE_STR-MANDANT sy-vline 
WA_TISSR_GP_CHANGE_STR-ASSET_NR sy-vline 
WA_TISSR_GP_CHANGE_STR-RANTYP sy-vline 
WA_TISSR_GP_CHANGE_STR-BUKRS sy-vline 
WA_TISSR_GP_CHANGE_STR-CHANGENR sy-vline 
WA_TISSR_GP_CHANGE_STR-OBJECTCLAS sy-vline 
WA_TISSR_GP_CHANGE_STR-OBJECTID sy-vline 
WA_TISSR_GP_CHANGE_STR-TABNAME sy-vline 
WA_TISSR_GP_CHANGE_STR-TABKEY sy-vline 
WA_TISSR_GP_CHANGE_STR-FNAME sy-vline 
WA_TISSR_GP_CHANGE_STR-CHNGIND sy-vline 
WA_TISSR_GP_CHANGE_STR-VALUE_NEW sy-vline 
WA_TISSR_GP_CHANGE_STR-VALUE_OLD sy-vline 
WA_TISSR_GP_CHANGE_STR-VALID_OLD sy-vline 
WA_TISSR_GP_CHANGE_STR-VALID_NEW sy-vline 
WA_TISSR_GP_CHANGE_STR-OLD_DGUEL_AB sy-vline 
WA_TISSR_GP_CHANGE_STR-NEW_DGUEL_BIS sy-vline 
WA_TISSR_GP_CHANGE_STR-UDATE sy-vline 
WA_TISSR_GP_CHANGE_STR-UTIME sy-vline 
WA_TISSR_GP_CHANGE_STR-USERNAME sy-vline 
WA_TISSR_GP_CHANGE_STR-REASON sy-vline      INTO ld_text SEPARATED BY SPACE.

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