ABAP Select data from SAP table TWIC8000 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TWIC8000 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 TWIC8000. 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 TWIC8000 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_TWIC8000 TYPE STANDARD TABLE OF TWIC8000,
      WA_TWIC8000 TYPE TWIC8000,
      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: <TWIC8000> TYPE TWIC8000.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TWIC8000.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TWIC8000
  INTO TABLE IT_TWIC8000.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TWIC8000
*  INTO TABLE @DATA(IT_TWIC80002).
*--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_TWIC8000 INDEX 1 INTO DATA(WA_TWIC80002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TWIC8000 ASSIGNING <TWIC8000>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TWIC8000>-MANDT = 1.
<TWIC8000>-CSTOBJ = 1.
<TWIC8000>-CSTSCM = 1.
<TWIC8000>-ANMBR = 1.
<TWIC8000>-ANAME = 1.

ENDLOOP.

LOOP AT IT_TWIC8000 INTO WA_TWIC8000.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TWIC8000-ATITL, sy-vline,
  WA_TWIC8000-GAPFM, sy-vline,
  WA_TWIC8000-GAPTO, sy-vline,
  WA_TWIC8000-GATH1, sy-vline,
  WA_TWIC8000-GATH2, sy-vline,
  WA_TWIC8000-PLSIZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TWIC8000 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_TWIC8000 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_TWIC8000 INTO WA_TWIC8000.


*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_TWIC8000_STR, 
MANDT TYPE STRING,
CSTOBJ TYPE STRING,
CSTSCM TYPE STRING,
ANMBR TYPE STRING,
ANAME TYPE STRING,
ATITL TYPE STRING,
GAPFM TYPE STRING,
GAPTO TYPE STRING,
GATH1 TYPE STRING,
GATH2 TYPE STRING,
PLSIZ TYPE STRING,
PSHUB TYPE STRING,
PSFMO TYPE STRING,
PSDES TYPE STRING,
PSANR TYPE STRING,
PSANM TYPE STRING,
PSATL TYPE STRING,
PSDSC TYPE STRING,
PSPRC TYPE STRING,
PSASH TYPE STRING,
PSAD1 TYPE STRING,
PSAD2 TYPE STRING,
PSAD3 TYPE STRING,
PSAD4 TYPE STRING,
PSAD5 TYPE STRING,
ADOC1 TYPE STRING,
ADOC2 TYPE STRING,
TREXP TYPE STRING,
TRFFM TYPE STRING,
TRFDE TYPE STRING,
NOPRC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TWIC8000_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_TWIC8000_STR-MANDT sy-vline 
WA_TWIC8000_STR-CSTOBJ sy-vline 
WA_TWIC8000_STR-CSTSCM sy-vline 
WA_TWIC8000_STR-ANMBR sy-vline 
WA_TWIC8000_STR-ANAME sy-vline 
WA_TWIC8000_STR-ATITL sy-vline 
WA_TWIC8000_STR-GAPFM sy-vline 
WA_TWIC8000_STR-GAPTO sy-vline 
WA_TWIC8000_STR-GATH1 sy-vline 
WA_TWIC8000_STR-GATH2 sy-vline 
WA_TWIC8000_STR-PLSIZ sy-vline 
WA_TWIC8000_STR-PSHUB sy-vline 
WA_TWIC8000_STR-PSFMO sy-vline 
WA_TWIC8000_STR-PSDES sy-vline 
WA_TWIC8000_STR-PSANR sy-vline 
WA_TWIC8000_STR-PSANM sy-vline 
WA_TWIC8000_STR-PSATL sy-vline 
WA_TWIC8000_STR-PSDSC sy-vline 
WA_TWIC8000_STR-PSPRC sy-vline 
WA_TWIC8000_STR-PSASH sy-vline 
WA_TWIC8000_STR-PSAD1 sy-vline 
WA_TWIC8000_STR-PSAD2 sy-vline 
WA_TWIC8000_STR-PSAD3 sy-vline 
WA_TWIC8000_STR-PSAD4 sy-vline 
WA_TWIC8000_STR-PSAD5 sy-vline 
WA_TWIC8000_STR-ADOC1 sy-vline 
WA_TWIC8000_STR-ADOC2 sy-vline 
WA_TWIC8000_STR-TREXP sy-vline 
WA_TWIC8000_STR-TRFFM sy-vline 
WA_TWIC8000_STR-TRFDE sy-vline 
WA_TWIC8000_STR-NOPRC sy-vline      INTO ld_text SEPARATED BY SPACE.

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