ABAP Select data from SAP table TRQS_LOT_ASSIG_ITEM_SCREEN 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 TRQS_LOT_ASSIG_ITEM_SCREEN 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 TRQS_LOT_ASSIG_ITEM_SCREEN. 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 TRQS_LOT_ASSIG_ITEM_SCREEN 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_TRQS_LOT_ASSIG_ITEM_SCREEN TYPE STANDARD TABLE OF TRQS_LOT_ASSIG_ITEM_SCREEN,
      WA_TRQS_LOT_ASSIG_ITEM_SCREEN TYPE TRQS_LOT_ASSIG_ITEM_SCREEN,
      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: <TRQS_LOT_ASSIG_ITEM_SCREEN> TYPE TRQS_LOT_ASSIG_ITEM_SCREEN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRQS_LOT_ASSIG_ITEM_SCREEN
*  INTO TABLE @DATA(IT_TRQS_LOT_ASSIG_ITEM_SCREEN2).
*--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_TRQS_LOT_ASSIG_ITEM_SCREEN INDEX 1 INTO DATA(WA_TRQS_LOT_ASSIG_ITEM_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRQS_LOT_ASSIG_ITEM_SCREEN>-LOT_ID = 1.
<TRQS_LOT_ASSIG_ITEM_SCREEN>-POSITION_DATE = 1.
<TRQS_LOT_ASSIG_ITEM_SCREEN>-ORIGIN_DATE = 1.
<TRQS_LOT_ASSIG_ITEM_SCREEN>-NOMINAL_CURR = 1.
<TRQS_LOT_ASSIG_ITEM_SCREEN>-NOMINAL_AVAIL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRQS_LOT_ASSIG_ITEM_SCREEN-NOMINAL_ASSIG, sy-vline,
  WA_TRQS_LOT_ASSIG_ITEM_SCREEN-NOMINAL_REST, sy-vline,
  WA_TRQS_LOT_ASSIG_ITEM_SCREEN-UNITS_AVAIL, sy-vline,
  WA_TRQS_LOT_ASSIG_ITEM_SCREEN-UNITS_ASSIG, sy-vline,
  WA_TRQS_LOT_ASSIG_ITEM_SCREEN-UNITS_REST, sy-vline,
  WA_TRQS_LOT_ASSIG_ITEM_SCREEN-BOOK_RATE_U, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRQS_LOT_ASSIG_ITEM_SCREEN 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_TRQS_LOT_ASSIG_ITEM_SCREEN 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_TRQS_LOT_ASSIG_ITEM_SCREEN INTO WA_TRQS_LOT_ASSIG_ITEM_SCREEN.


*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_TRQS_LOT_ASSIG_ITEM_SCREEN_STR, 
LOT_ID TYPE STRING,
POSITION_DATE TYPE STRING,
ORIGIN_DATE TYPE STRING,
NOMINAL_CURR TYPE STRING,
NOMINAL_AVAIL TYPE STRING,
NOMINAL_ASSIG TYPE STRING,
NOMINAL_REST TYPE STRING,
UNITS_AVAIL TYPE STRING,
UNITS_ASSIG TYPE STRING,
UNITS_REST TYPE STRING,
BOOK_RATE_U TYPE STRING,
BOOK_RATE_P TYPE STRING,
AQU_RATE_U TYPE STRING,
AQU_RATE_P TYPE STRING,
FLG_ASSIGNED TYPE STRING,
ASSIGNMENT_AMOUNT TYPE STRING,
ASSIGNMENT_CURR TYPE STRING,
ASSIGNMENT_RATE_P TYPE STRING,
ASSIGNMENT_RATE_U TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRQS_LOT_ASSIG_ITEM_SCREEN_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_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-LOT_ID sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-POSITION_DATE sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-ORIGIN_DATE sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-NOMINAL_CURR sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-NOMINAL_AVAIL sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-NOMINAL_ASSIG sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-NOMINAL_REST sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-UNITS_AVAIL sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-UNITS_ASSIG sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-UNITS_REST sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-BOOK_RATE_U sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-BOOK_RATE_P sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-AQU_RATE_U sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-AQU_RATE_P sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-FLG_ASSIGNED sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-ASSIGNMENT_AMOUNT sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-ASSIGNMENT_CURR sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-ASSIGNMENT_RATE_P sy-vline 
WA_TRQS_LOT_ASSIG_ITEM_SCREEN_STR-ASSIGNMENT_RATE_U sy-vline      INTO ld_text SEPARATED BY SPACE.

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