ABAP Select data from SAP table TRLV_DFT_ASSIGN0 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TRLV_DFT_ASSIGN0 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 TRLV_DFT_ASSIGN0. 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 TRLV_DFT_ASSIGN0 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_TRLV_DFT_ASSIGN0 TYPE STANDARD TABLE OF TRLV_DFT_ASSIGN0,
      WA_TRLV_DFT_ASSIGN0 TYPE TRLV_DFT_ASSIGN0,
      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: <TRLV_DFT_ASSIGN0> TYPE TRLV_DFT_ASSIGN0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TRLV_DFT_ASSIGN0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TRLV_DFT_ASSIGN0
  INTO TABLE IT_TRLV_DFT_ASSIGN0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRLV_DFT_ASSIGN0
*  INTO TABLE @DATA(IT_TRLV_DFT_ASSIGN02).
*--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_TRLV_DFT_ASSIGN0 INDEX 1 INTO DATA(WA_TRLV_DFT_ASSIGN02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TRLV_DFT_ASSIGN0 ASSIGNING <TRLV_DFT_ASSIGN0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRLV_DFT_ASSIGN0>-MANDT = 1.
<TRLV_DFT_ASSIGN0>-POS_MAN_PROC = 1.
<TRLV_DFT_ASSIGN0>-POS_MAN_PROC_T = 1.
<TRLV_DFT_ASSIGN0>-B001 = 1.
<TRLV_DFT_ASSIGN0>-C001 = 1.

ENDLOOP.

LOOP AT IT_TRLV_DFT_ASSIGN0 INTO WA_TRLV_DFT_ASSIGN0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRLV_DFT_ASSIGN0-D001, sy-vline,
  WA_TRLV_DFT_ASSIGN0-E001, sy-vline,
  WA_TRLV_DFT_ASSIGN0-F001, sy-vline,
  WA_TRLV_DFT_ASSIGN0-G001, sy-vline,
  WA_TRLV_DFT_ASSIGN0-H001, sy-vline,
  WA_TRLV_DFT_ASSIGN0-J001, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRLV_DFT_ASSIGN0 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_TRLV_DFT_ASSIGN0 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_TRLV_DFT_ASSIGN0 INTO WA_TRLV_DFT_ASSIGN0.


*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_TRLV_DFT_ASSIGN0_STR, 
MANDT TYPE STRING,
POS_MAN_PROC TYPE STRING,
POS_MAN_PROC_T TYPE STRING,
B001 TYPE STRING,
C001 TYPE STRING,
D001 TYPE STRING,
E001 TYPE STRING,
F001 TYPE STRING,
G001 TYPE STRING,
H001 TYPE STRING,
J001 TYPE STRING,
V001 TYPE STRING,
K001 TYPE STRING,
L001 TYPE STRING,
M001 TYPE STRING,
N001 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRLV_DFT_ASSIGN0_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_TRLV_DFT_ASSIGN0_STR-MANDT sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-POS_MAN_PROC sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-POS_MAN_PROC_T sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-B001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-C001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-D001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-E001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-F001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-G001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-H001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-J001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-V001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-K001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-L001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-M001 sy-vline 
WA_TRLV_DFT_ASSIGN0_STR-N001 sy-vline      INTO ld_text SEPARATED BY SPACE.

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