ABAP Select data from SAP table T390_U into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T390_U 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 T390_U. 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 T390_U 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_T390_U TYPE STANDARD TABLE OF T390_U,
      WA_T390_U TYPE T390_U,
      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: <T390_U> TYPE T390_U.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T390_U.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T390_U
  INTO TABLE IT_T390_U.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T390_U
*  INTO TABLE @DATA(IT_T390_U2).
*--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_T390_U INDEX 1 INTO DATA(WA_T390_U2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T390_U ASSIGNING <T390_U>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T390_U>-MANDT = 1.
<T390_U>-UNAME = 1.
<T390_U>-PM_APPL = 1.
<T390_U>-IWERK = 1.
<T390_U>-INGRP = 1.

ENDLOOP.

LOOP AT IT_T390_U INTO WA_T390_U.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T390_U-WORKPAPER, sy-vline,
  WA_T390_U-TDDEST, sy-vline,
  WA_T390_U-TDCOPIES, sy-vline,
  WA_T390_U-TDNEWID, sy-vline,
  WA_T390_U-TDIMMED, sy-vline,
  WA_T390_U-TDDELETE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T390_U 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_T390_U 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_T390_U INTO WA_T390_U.


*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.

*Conversion exit SPDEV, internal->external for field TDDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_T390_U-TDDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T390_U-TDDEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field PRINT_LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_T390_U-PRINT_LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T390_U-PRINT_LANG.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T390_U_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
PM_APPL TYPE STRING,
IWERK TYPE STRING,
INGRP TYPE STRING,
WORKPAPER TYPE STRING,
TDDEST TYPE STRING,
TDCOPIES TYPE STRING,
TDNEWID TYPE STRING,
TDIMMED TYPE STRING,
TDDELETE TYPE STRING,
TDCOVER TYPE STRING,
TDCOVTITLE TYPE STRING,
TDRECEIVER TYPE STRING,
PRINT_LANG TYPE STRING,
TDARMOD TYPE STRING,
TDTELENUM TYPE STRING,
TDTELELAND TYPE STRING,
JOB_CARD TYPE STRING,
FLG_RMDB TYPE STRING,
FLG_RMDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T390_U_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_T390_U_STR-MANDT sy-vline 
WA_T390_U_STR-UNAME sy-vline 
WA_T390_U_STR-PM_APPL sy-vline 
WA_T390_U_STR-IWERK sy-vline 
WA_T390_U_STR-INGRP sy-vline 
WA_T390_U_STR-WORKPAPER sy-vline 
WA_T390_U_STR-TDDEST sy-vline 
WA_T390_U_STR-TDCOPIES sy-vline 
WA_T390_U_STR-TDNEWID sy-vline 
WA_T390_U_STR-TDIMMED sy-vline 
WA_T390_U_STR-TDDELETE sy-vline 
WA_T390_U_STR-TDCOVER sy-vline 
WA_T390_U_STR-TDCOVTITLE sy-vline 
WA_T390_U_STR-TDRECEIVER sy-vline 
WA_T390_U_STR-PRINT_LANG sy-vline 
WA_T390_U_STR-TDARMOD sy-vline 
WA_T390_U_STR-TDTELENUM sy-vline 
WA_T390_U_STR-TDTELELAND sy-vline 
WA_T390_U_STR-JOB_CARD sy-vline 
WA_T390_U_STR-FLG_RMDB sy-vline 
WA_T390_U_STR-FLG_RMDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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