ABAP Select data from SAP table TRLC_DFT_ASSGN_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRLC_DFT_ASSGN_L
*  INTO TABLE @DATA(IT_TRLC_DFT_ASSGN_L2).
*--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_TRLC_DFT_ASSGN_L INDEX 1 INTO DATA(WA_TRLC_DFT_ASSGN_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRLC_DFT_ASSGN_L>-MANDT = 1.
<TRLC_DFT_ASSGN_L>-POS_MAN_PROC = 1.
<TRLC_DFT_ASSGN_L>-L001 = 1.
<TRLC_DFT_ASSGN_L>-L002 = 1.
<TRLC_DFT_ASSGN_L>-L003 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRLC_DFT_ASSGN_L-L004, sy-vline,
  WA_TRLC_DFT_ASSGN_L-L005, sy-vline,
  WA_TRLC_DFT_ASSGN_L-L006, sy-vline,
  WA_TRLC_DFT_ASSGN_L-L007, sy-vline,
  WA_TRLC_DFT_ASSGN_L-L008, sy-vline,
  WA_TRLC_DFT_ASSGN_L-L009, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRLC_DFT_ASSGN_L 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_TRLC_DFT_ASSGN_L 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_TRLC_DFT_ASSGN_L INTO WA_TRLC_DFT_ASSGN_L.


*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_TRLC_DFT_ASSGN_L_STR, 
MANDT TYPE STRING,
POS_MAN_PROC TYPE STRING,
L001 TYPE STRING,
L002 TYPE STRING,
L003 TYPE STRING,
L004 TYPE STRING,
L005 TYPE STRING,
L006 TYPE STRING,
L007 TYPE STRING,
L008 TYPE STRING,
L009 TYPE STRING,
L010 TYPE STRING,
L011 TYPE STRING,
L012 TYPE STRING,
L013 TYPE STRING,
L014 TYPE STRING,
L015 TYPE STRING,
L016 TYPE STRING,
L017 TYPE STRING,
L018 TYPE STRING,
L019 TYPE STRING,
L020 TYPE STRING,
L021 TYPE STRING,
L022 TYPE STRING,
L023 TYPE STRING,
L024 TYPE STRING,
L025 TYPE STRING,
L026 TYPE STRING,
L027 TYPE STRING,
L028 TYPE STRING,
L029 TYPE STRING,
L030 TYPE STRING,
L031 TYPE STRING,
L032 TYPE STRING,
L033 TYPE STRING,
L034 TYPE STRING,
L035 TYPE STRING,
L036 TYPE STRING,
L037 TYPE STRING,
L038 TYPE STRING,
L039 TYPE STRING,
L040 TYPE STRING,
L041 TYPE STRING,
L042 TYPE STRING,
L043 TYPE STRING,
L044 TYPE STRING,
L045 TYPE STRING,
L046 TYPE STRING,
L047 TYPE STRING,
L048 TYPE STRING,
L049 TYPE STRING,
L050 TYPE STRING,
L051 TYPE STRING,
L052 TYPE STRING,
L053 TYPE STRING,
L054 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRLC_DFT_ASSGN_L_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_TRLC_DFT_ASSGN_L_STR-MANDT sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-POS_MAN_PROC sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L001 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L002 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L003 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L004 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L005 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L006 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L007 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L008 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L009 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L010 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L011 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L012 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L013 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L014 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L015 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L016 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L017 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L018 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L019 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L020 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L021 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L022 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L023 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L024 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L025 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L026 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L027 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L028 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L029 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L030 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L031 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L032 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L033 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L034 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L035 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L036 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L037 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L038 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L039 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L040 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L041 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L042 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L043 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L044 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L045 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L046 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L047 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L048 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L049 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L050 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L051 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L052 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L053 sy-vline 
WA_TRLC_DFT_ASSGN_L_STR-L054 sy-vline      INTO ld_text SEPARATED BY SPACE.

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