ABAP Select data from SAP table TSIW_MAPPING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TSIW_MAPPING
*  INTO TABLE @DATA(IT_TSIW_MAPPING2).
*--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_TSIW_MAPPING INDEX 1 INTO DATA(WA_TSIW_MAPPING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TSIW_MAPPING>-PROJECT_ID = 1.
<TSIW_MAPPING>-UUID = 1.
<TSIW_MAPPING>-SOURCE_UUID = 1.
<TSIW_MAPPING>-TARGET_UUID = 1.
<TSIW_MAPPING>-MAPPING_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TSIW_MAPPING-TRGT_GDT_NMSPCE, sy-vline,
  WA_TSIW_MAPPING-PROXY_LOCK, sy-vline,
  WA_TSIW_MAPPING-ESR_LOCK, sy-vline,
  WA_TSIW_MAPPING-USERNAME, sy-vline,
  WA_TSIW_MAPPING-TIMESTAMP, sy-vline,
  WA_TSIW_MAPPING-USERNAMEESR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TSIW_MAPPING 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_TSIW_MAPPING 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_TSIW_MAPPING INTO WA_TSIW_MAPPING.


*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_TSIW_MAPPING_STR, 
PROJECT_ID TYPE STRING,
UUID TYPE STRING,
SOURCE_UUID TYPE STRING,
TARGET_UUID TYPE STRING,
MAPPING_TYPE TYPE STRING,
TRGT_GDT_NMSPCE TYPE STRING,
PROXY_LOCK TYPE STRING,
ESR_LOCK TYPE STRING,
USERNAME TYPE STRING,
TIMESTAMP TYPE STRING,
USERNAMEESR TYPE STRING,
TIMESTAMPESR TYPE STRING,
USERNAMEPRX TYPE STRING,
TIMESTAMPPRX TYPE STRING,
FMNAME TYPE STRING,
FGNAME TYPE STRING,
WSABAPNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TSIW_MAPPING_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_TSIW_MAPPING_STR-PROJECT_ID sy-vline 
WA_TSIW_MAPPING_STR-UUID sy-vline 
WA_TSIW_MAPPING_STR-SOURCE_UUID sy-vline 
WA_TSIW_MAPPING_STR-TARGET_UUID sy-vline 
WA_TSIW_MAPPING_STR-MAPPING_TYPE sy-vline 
WA_TSIW_MAPPING_STR-TRGT_GDT_NMSPCE sy-vline 
WA_TSIW_MAPPING_STR-PROXY_LOCK sy-vline 
WA_TSIW_MAPPING_STR-ESR_LOCK sy-vline 
WA_TSIW_MAPPING_STR-USERNAME sy-vline 
WA_TSIW_MAPPING_STR-TIMESTAMP sy-vline 
WA_TSIW_MAPPING_STR-USERNAMEESR sy-vline 
WA_TSIW_MAPPING_STR-TIMESTAMPESR sy-vline 
WA_TSIW_MAPPING_STR-USERNAMEPRX sy-vline 
WA_TSIW_MAPPING_STR-TIMESTAMPPRX sy-vline 
WA_TSIW_MAPPING_STR-FMNAME sy-vline 
WA_TSIW_MAPPING_STR-FGNAME sy-vline 
WA_TSIW_MAPPING_STR-WSABAPNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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