ABAP Select data from SAP table UPS_LINKS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPS_LINKS
*  INTO TABLE @DATA(IT_UPS_LINKS2).
*--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_UPS_LINKS INDEX 1 INTO DATA(WA_UPS_LINKS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UPS_LINKS>-MANDT = 1.
<UPS_LINKS>-ORGVL = 1.
<UPS_LINKS>-TEILPLAN = 1.
<UPS_LINKS>-VERSION = 1.
<UPS_LINKS>-STARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPS_LINKS-DUEDATE, sy-vline,
  WA_UPS_LINKS-DUETIME, sy-vline,
  WA_UPS_LINKS-TSTAMP, sy-vline,
  WA_UPS_LINKS-TZONE, sy-vline,
  WA_UPS_LINKS-PLANLINK, sy-vline,
  WA_UPS_LINKS-APPROLINK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPS_LINKS 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_UPS_LINKS 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_UPS_LINKS INTO WA_UPS_LINKS.


*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_UPS_LINKS_STR, 
MANDT TYPE STRING,
ORGVL TYPE STRING,
TEILPLAN TYPE STRING,
VERSION TYPE STRING,
STARTDATE TYPE STRING,
DUEDATE TYPE STRING,
DUETIME TYPE STRING,
TSTAMP TYPE STRING,
TZONE TYPE STRING,
PLANLINK TYPE STRING,
APPROLINK TYPE STRING,
WORKLIST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPS_LINKS_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_UPS_LINKS_STR-MANDT sy-vline 
WA_UPS_LINKS_STR-ORGVL sy-vline 
WA_UPS_LINKS_STR-TEILPLAN sy-vline 
WA_UPS_LINKS_STR-VERSION sy-vline 
WA_UPS_LINKS_STR-STARTDATE sy-vline 
WA_UPS_LINKS_STR-DUEDATE sy-vline 
WA_UPS_LINKS_STR-DUETIME sy-vline 
WA_UPS_LINKS_STR-TSTAMP sy-vline 
WA_UPS_LINKS_STR-TZONE sy-vline 
WA_UPS_LINKS_STR-PLANLINK sy-vline 
WA_UPS_LINKS_STR-APPROLINK sy-vline 
WA_UPS_LINKS_STR-WORKLIST sy-vline      INTO ld_text SEPARATED BY SPACE.

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