ABAP Select data from SAP table TRLV_DFT_ASSIGN1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TRLV_DFT_ASSIGN1 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_ASSIGN1. 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_ASSIGN1 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_ASSIGN1 TYPE STANDARD TABLE OF TRLV_DFT_ASSIGN1,
      WA_TRLV_DFT_ASSIGN1 TYPE TRLV_DFT_ASSIGN1,
      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_ASSIGN1> TYPE TRLV_DFT_ASSIGN1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TRLV_DFT_ASSIGN1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TRLV_DFT_ASSIGN1
  INTO TABLE IT_TRLV_DFT_ASSIGN1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRLV_DFT_ASSIGN1
*  INTO TABLE @DATA(IT_TRLV_DFT_ASSIGN12).
*--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_ASSIGN1 INDEX 1 INTO DATA(WA_TRLV_DFT_ASSIGN12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TRLV_DFT_ASSIGN1 ASSIGNING <TRLV_DFT_ASSIGN1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRLV_DFT_ASSIGN1>-MANDT = 1.
<TRLV_DFT_ASSIGN1>-POS_MAN_PROC = 1.
<TRLV_DFT_ASSIGN1>-A001 = 1.
<TRLV_DFT_ASSIGN1>-A002 = 1.
<TRLV_DFT_ASSIGN1>-A003 = 1.

ENDLOOP.

LOOP AT IT_TRLV_DFT_ASSIGN1 INTO WA_TRLV_DFT_ASSIGN1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRLV_DFT_ASSIGN1-A004, sy-vline,
  WA_TRLV_DFT_ASSIGN1-A005, sy-vline,
  WA_TRLV_DFT_ASSIGN1-A006, sy-vline,
  WA_TRLV_DFT_ASSIGN1-A007, sy-vline,
  WA_TRLV_DFT_ASSIGN1-A008, sy-vline,
  WA_TRLV_DFT_ASSIGN1-A009, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRLV_DFT_ASSIGN1 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_ASSIGN1 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_ASSIGN1 INTO WA_TRLV_DFT_ASSIGN1.


*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_ASSIGN1_STR, 
MANDT TYPE STRING,
POS_MAN_PROC TYPE STRING,
A001 TYPE STRING,
A002 TYPE STRING,
A003 TYPE STRING,
A004 TYPE STRING,
A005 TYPE STRING,
A006 TYPE STRING,
A007 TYPE STRING,
A008 TYPE STRING,
A009 TYPE STRING,
A010 TYPE STRING,
A011 TYPE STRING,
A012 TYPE STRING,
A013 TYPE STRING,
A014 TYPE STRING,
A015 TYPE STRING,
A016 TYPE STRING,
A020 TYPE STRING,
A021 TYPE STRING,
A022 TYPE STRING,
A023 TYPE STRING,
A031 TYPE STRING,
A032 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRLV_DFT_ASSIGN1_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_ASSIGN1_STR-MANDT sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-POS_MAN_PROC sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A001 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A002 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A003 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A004 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A005 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A006 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A007 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A008 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A009 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A010 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A011 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A012 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A013 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A014 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A015 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A016 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A020 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A021 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A022 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A023 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A031 sy-vline 
WA_TRLV_DFT_ASSIGN1_STR-A032 sy-vline      INTO ld_text SEPARATED BY SPACE.

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