ABAP Select data from SAP table TLSY3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TLSY3 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 TLSY3. 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 TLSY3 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_TLSY3 TYPE STANDARD TABLE OF TLSY3,
      WA_TLSY3 TYPE TLSY3,
      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: <TLSY3> TYPE TLSY3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TLSY3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TLSY3
  INTO TABLE IT_TLSY3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TLSY3
*  INTO TABLE @DATA(IT_TLSY32).
*--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_TLSY3 INDEX 1 INTO DATA(WA_TLSY32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TLSY3 ASSIGNING <TLSY3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TLSY3>-REL = 1.
<TLSY3>-IMPDATE = 1.
<TLSY3>-LDIR = 1.
<TLSY3>-PDIR = 1.
<TLSY3>-IMPMODE = 1.

ENDLOOP.

LOOP AT IT_TLSY3 INTO WA_TLSY3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TLSY3-RESTART, sy-vline,
  WA_TLSY3-IMPSTAT, sy-vline,
  WA_TLSY3-TLSYSFLAG, sy-vline,
  WA_TLSY3-FILLER1, sy-vline,
  WA_TLSY3-CHCKPKT, sy-vline,
  WA_TLSY3-RESTARTKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TLSY3 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_TLSY3 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_TLSY3 INTO WA_TLSY3.


*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_TLSY3_STR, 
REL TYPE STRING,
IMPDATE TYPE STRING,
LDIR TYPE STRING,
PDIR TYPE STRING,
IMPMODE TYPE STRING,
RESTART TYPE STRING,
IMPSTAT TYPE STRING,
TLSYSFLAG TYPE STRING,
FILLER1 TYPE STRING,
CHCKPKT TYPE STRING,
RESTARTKT TYPE STRING,
RESTARTLT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TLSY3_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_TLSY3_STR-REL sy-vline 
WA_TLSY3_STR-IMPDATE sy-vline 
WA_TLSY3_STR-LDIR sy-vline 
WA_TLSY3_STR-PDIR sy-vline 
WA_TLSY3_STR-IMPMODE sy-vline 
WA_TLSY3_STR-RESTART sy-vline 
WA_TLSY3_STR-IMPSTAT sy-vline 
WA_TLSY3_STR-TLSYSFLAG sy-vline 
WA_TLSY3_STR-FILLER1 sy-vline 
WA_TLSY3_STR-CHCKPKT sy-vline 
WA_TLSY3_STR-RESTARTKT sy-vline 
WA_TLSY3_STR-RESTARTLT sy-vline      INTO ld_text SEPARATED BY SPACE.

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