ABAP Select data from SAP table TRLC_DFT_ASSGN_H 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_H 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_H. 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_H 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_H TYPE STANDARD TABLE OF TRLC_DFT_ASSGN_H,
      WA_TRLC_DFT_ASSGN_H TYPE TRLC_DFT_ASSGN_H,
      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_H> TYPE TRLC_DFT_ASSGN_H.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRLC_DFT_ASSGN_H
*  INTO TABLE @DATA(IT_TRLC_DFT_ASSGN_H2).
*--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_H INDEX 1 INTO DATA(WA_TRLC_DFT_ASSGN_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRLC_DFT_ASSGN_H>-MANDT = 1.
<TRLC_DFT_ASSGN_H>-POS_MAN_PROC = 1.
<TRLC_DFT_ASSGN_H>-H001 = 1.
<TRLC_DFT_ASSGN_H>-H002 = 1.
<TRLC_DFT_ASSGN_H>-H003 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRLC_DFT_ASSGN_H-H004, sy-vline,
  WA_TRLC_DFT_ASSGN_H-H005, sy-vline,
  WA_TRLC_DFT_ASSGN_H-H006, sy-vline,
  WA_TRLC_DFT_ASSGN_H-H007, sy-vline,
  WA_TRLC_DFT_ASSGN_H-H008, sy-vline,
  WA_TRLC_DFT_ASSGN_H-H009, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRLC_DFT_ASSGN_H 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_H 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_H INTO WA_TRLC_DFT_ASSGN_H.


*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_H_STR, 
MANDT TYPE STRING,
POS_MAN_PROC TYPE STRING,
H001 TYPE STRING,
H002 TYPE STRING,
H003 TYPE STRING,
H004 TYPE STRING,
H005 TYPE STRING,
H006 TYPE STRING,
H007 TYPE STRING,
H008 TYPE STRING,
H009 TYPE STRING,
H010 TYPE STRING,
H011 TYPE STRING,
H012 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRLC_DFT_ASSGN_H_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_H_STR-MANDT sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-POS_MAN_PROC sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H001 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H002 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H003 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H004 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H005 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H006 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H007 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H008 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H009 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H010 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H011 sy-vline 
WA_TRLC_DFT_ASSGN_H_STR-H012 sy-vline      INTO ld_text SEPARATED BY SPACE.

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