ABAP Select data from SAP table ILTRNWLTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILTRNWLTP
*  INTO TABLE @DATA(IT_ILTRNWLTP2).
*--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_ILTRNWLTP INDEX 1 INTO DATA(WA_ILTRNWLTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILTRNWLTP>-MANDT = 1.
<ILTRNWLTP>-LGLCNTNTMRNWLANDTERMNUUID = 1.
<ILTRNWLTP>-LEGALTRANSACTIONUUID = 1.
<ILTRNWLTP>-LGLCNTNTMRNWLTYPE = 1.
<ILTRNWLTP>-LGLCNTNTMRNWLPERIOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILTRNWLTP-LGLCNTNTMRNWLPERIODUNIT, sy-vline,
  WA_ILTRNWLTP-LGLCNTNTMRENEWALCLAUSE, sy-vline,
  WA_ILTRNWLTP-LGLCNTNTMTERMINATIONCLAUSE, sy-vline,
  WA_ILTRNWLTP-LGLCNTNTMNEXTTERMNCLAUSE, sy-vline,
  WA_ILTRNWLTP-LGLCNTNTMNMBROFRENEWALS, sy-vline,
  WA_ILTRNWLTP-LGLCNTNTMRNWLREMINDERUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILTRNWLTP 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_ILTRNWLTP 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_ILTRNWLTP INTO WA_ILTRNWLTP.


*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 CUNIT, internal->external for field LGLCNTNTMRNWLPERIODUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ILTRNWLTP-LGLCNTNTMRNWLPERIODUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILTRNWLTP-LGLCNTNTMRNWLPERIODUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LGLCNTNTMREMINDERTIMEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ILTRNWLTP-LGLCNTNTMREMINDERTIMEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILTRNWLTP-LGLCNTNTMREMINDERTIMEUNIT.
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_ILTRNWLTP_STR, 
MANDT TYPE STRING,
LGLCNTNTMRNWLANDTERMNUUID TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LGLCNTNTMRNWLTYPE TYPE STRING,
LGLCNTNTMRNWLPERIOD TYPE STRING,
LGLCNTNTMRNWLPERIODUNIT TYPE STRING,
LGLCNTNTMRENEWALCLAUSE TYPE STRING,
LGLCNTNTMTERMINATIONCLAUSE TYPE STRING,
LGLCNTNTMNEXTTERMNCLAUSE TYPE STRING,
LGLCNTNTMNMBROFRENEWALS TYPE STRING,
LGLCNTNTMRNWLREMINDERUSER TYPE STRING,
LGLCNTNTMTERMNREMINDERUSER TYPE STRING,
LGLCNTNTMRNWLREMINDERDAYS TYPE STRING,
LGLCNTNTMTERMNREMINDERDAYS TYPE STRING,
LGLCNTNTMREMINDERTIMEUNIT TYPE STRING,
LGLCNTNTMNEXTTERMNNOTIFDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILTRNWLTP_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_ILTRNWLTP_STR-MANDT sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLANDTERMNUUID sy-vline 
WA_ILTRNWLTP_STR-LEGALTRANSACTIONUUID sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLTYPE sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLPERIOD sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLPERIODUNIT sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRENEWALCLAUSE sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMTERMINATIONCLAUSE sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMNEXTTERMNCLAUSE sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMNMBROFRENEWALS sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLREMINDERUSER sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMTERMNREMINDERUSER sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMRNWLREMINDERDAYS sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMTERMNREMINDERDAYS sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMREMINDERTIMEUNIT sy-vline 
WA_ILTRNWLTP_STR-LGLCNTNTMNEXTTERMNNOTIFDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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