ABAP Select data from SAP table LEDLV_IT_SCHED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LEDLV_IT_SCHED
*  INTO TABLE @DATA(IT_LEDLV_IT_SCHED2).
*--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_LEDLV_IT_SCHED INDEX 1 INTO DATA(WA_LEDLV_IT_SCHED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LEDLV_IT_SCHED>-DELIV_NUMB = 1.
<LEDLV_IT_SCHED>-ITM_NUMBER = 1.
<LEDLV_IT_SCHED>-DLVSCHEDTYPE = 1.
<LEDLV_IT_SCHED>-DLVSCHEDNUMI = 1.
<LEDLV_IT_SCHED>-CUSTCHNGSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LEDLV_IT_SCHED-CONSUMPPNT, sy-vline,
  WA_LEDLV_IT_SCHED-USR01, sy-vline,
  WA_LEDLV_IT_SCHED-USR02, sy-vline,
  WA_LEDLV_IT_SCHED-USR03, sy-vline,
  WA_LEDLV_IT_SCHED-USR04, sy-vline,
  WA_LEDLV_IT_SCHED-USR05, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LEDLV_IT_SCHED 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_LEDLV_IT_SCHED 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_LEDLV_IT_SCHED INTO WA_LEDLV_IT_SCHED.


*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 ALPHA, internal->external for field DELIV_NUMB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LEDLV_IT_SCHED-DELIV_NUMB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LEDLV_IT_SCHED-DELIV_NUMB.
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_LEDLV_IT_SCHED_STR, 
DELIV_NUMB TYPE STRING,
ITM_NUMBER TYPE STRING,
DLVSCHEDTYPE TYPE STRING,
DLVSCHEDNUMI TYPE STRING,
CUSTCHNGSTATUS TYPE STRING,
CONSUMPPNT TYPE STRING,
USR01 TYPE STRING,
USR02 TYPE STRING,
USR03 TYPE STRING,
USR04 TYPE STRING,
USR05 TYPE STRING,
FLAG_PREF TYPE STRING,
DLVSCHEDNO TYPE STRING,
DLVSCHEDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LEDLV_IT_SCHED_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_LEDLV_IT_SCHED_STR-DELIV_NUMB sy-vline 
WA_LEDLV_IT_SCHED_STR-ITM_NUMBER sy-vline 
WA_LEDLV_IT_SCHED_STR-DLVSCHEDTYPE sy-vline 
WA_LEDLV_IT_SCHED_STR-DLVSCHEDNUMI sy-vline 
WA_LEDLV_IT_SCHED_STR-CUSTCHNGSTATUS sy-vline 
WA_LEDLV_IT_SCHED_STR-CONSUMPPNT sy-vline 
WA_LEDLV_IT_SCHED_STR-USR01 sy-vline 
WA_LEDLV_IT_SCHED_STR-USR02 sy-vline 
WA_LEDLV_IT_SCHED_STR-USR03 sy-vline 
WA_LEDLV_IT_SCHED_STR-USR04 sy-vline 
WA_LEDLV_IT_SCHED_STR-USR05 sy-vline 
WA_LEDLV_IT_SCHED_STR-FLAG_PREF sy-vline 
WA_LEDLV_IT_SCHED_STR-DLVSCHEDNO sy-vline 
WA_LEDLV_IT_SCHED_STR-DLVSCHEDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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