ABAP Select data from SAP table TKETRLGI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKETRLGI
*  INTO TABLE @DATA(IT_TKETRLGI2).
*--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_TKETRLGI INDEX 1 INTO DATA(WA_TKETRLGI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKETRLGI>-KTABNAME = 1.
<TKETRLGI>-KTSUBNR = 1.
<TKETRLGI>-TTABNAME = 1.
<TKETRLGI>-GENSTATUS = 1.
<TKETRLGI>-SAPRL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKETRLGI-TIMESTMP, sy-vline,
  WA_TKETRLGI-STATNKT, sy-vline,
  WA_TKETRLGI-STATNTR, sy-vline,
  WA_TKETRLGI-STATNOE, sy-vline,
  WA_TKETRLGI-STATNEP, sy-vline,
  WA_TKETRLGI-STATTOE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKETRLGI 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_TKETRLGI 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_TKETRLGI INTO WA_TKETRLGI.


*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_TKETRLGI_STR, 
KTABNAME TYPE STRING,
KTSUBNR TYPE STRING,
TTABNAME TYPE STRING,
GENSTATUS TYPE STRING,
SAPRL TYPE STRING,
TIMESTMP TYPE STRING,
STATNKT TYPE STRING,
STATNTR TYPE STRING,
STATNOE TYPE STRING,
STATNEP TYPE STRING,
STATTOE TYPE STRING,
STATTEP TYPE STRING,
STATNREQ TYPE STRING,
STATTREQ TYPE STRING,
STATDREQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKETRLGI_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_TKETRLGI_STR-KTABNAME sy-vline 
WA_TKETRLGI_STR-KTSUBNR sy-vline 
WA_TKETRLGI_STR-TTABNAME sy-vline 
WA_TKETRLGI_STR-GENSTATUS sy-vline 
WA_TKETRLGI_STR-SAPRL sy-vline 
WA_TKETRLGI_STR-TIMESTMP sy-vline 
WA_TKETRLGI_STR-STATNKT sy-vline 
WA_TKETRLGI_STR-STATNTR sy-vline 
WA_TKETRLGI_STR-STATNOE sy-vline 
WA_TKETRLGI_STR-STATNEP sy-vline 
WA_TKETRLGI_STR-STATTOE sy-vline 
WA_TKETRLGI_STR-STATTEP sy-vline 
WA_TKETRLGI_STR-STATNREQ sy-vline 
WA_TKETRLGI_STR-STATTREQ sy-vline 
WA_TKETRLGI_STR-STATDREQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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