ABAP Select data from SAP table SIN_T_LINK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIN_T_LINK
*  INTO TABLE @DATA(IT_SIN_T_LINK2).
*--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_SIN_T_LINK INDEX 1 INTO DATA(WA_SIN_T_LINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIN_T_LINK>-MANDT = 1.
<SIN_T_LINK>-UNAME = 1.
<SIN_T_LINK>-NODE_KEY = 1.
<SIN_T_LINK>-RELATKEY = 1.
<SIN_T_LINK>-RELATSHIP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIN_T_LINK-HIDDEN, sy-vline,
  WA_SIN_T_LINK-DISABLED, sy-vline,
  WA_SIN_T_LINK-ISFOLDER, sy-vline,
  WA_SIN_T_LINK-N_IMAGE, sy-vline,
  WA_SIN_T_LINK-EXP_IMAGE, sy-vline,
  WA_SIN_T_LINK-STYLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SIN_T_LINK 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_SIN_T_LINK 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_SIN_T_LINK INTO WA_SIN_T_LINK.


*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_SIN_T_LINK_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
NODE_KEY TYPE STRING,
RELATKEY TYPE STRING,
RELATSHIP TYPE STRING,
HIDDEN TYPE STRING,
DISABLED TYPE STRING,
ISFOLDER TYPE STRING,
N_IMAGE TYPE STRING,
EXP_IMAGE TYPE STRING,
STYLE TYPE STRING,
LAST_HITEM TYPE STRING,
NO_BRANCH TYPE STRING,
EXPANDER TYPE STRING,
TEXT TYPE STRING,
FOLRG TYPE STRING,
CLASS TYPE STRING,
SUBCLASS TYPE STRING,
CLDEP TYPE STRING,
OWNER TYPE STRING,
EXPANDED TYPE STRING,
PROTECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIN_T_LINK_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_SIN_T_LINK_STR-MANDT sy-vline 
WA_SIN_T_LINK_STR-UNAME sy-vline 
WA_SIN_T_LINK_STR-NODE_KEY sy-vline 
WA_SIN_T_LINK_STR-RELATKEY sy-vline 
WA_SIN_T_LINK_STR-RELATSHIP sy-vline 
WA_SIN_T_LINK_STR-HIDDEN sy-vline 
WA_SIN_T_LINK_STR-DISABLED sy-vline 
WA_SIN_T_LINK_STR-ISFOLDER sy-vline 
WA_SIN_T_LINK_STR-N_IMAGE sy-vline 
WA_SIN_T_LINK_STR-EXP_IMAGE sy-vline 
WA_SIN_T_LINK_STR-STYLE sy-vline 
WA_SIN_T_LINK_STR-LAST_HITEM sy-vline 
WA_SIN_T_LINK_STR-NO_BRANCH sy-vline 
WA_SIN_T_LINK_STR-EXPANDER sy-vline 
WA_SIN_T_LINK_STR-TEXT sy-vline 
WA_SIN_T_LINK_STR-FOLRG sy-vline 
WA_SIN_T_LINK_STR-CLASS sy-vline 
WA_SIN_T_LINK_STR-SUBCLASS sy-vline 
WA_SIN_T_LINK_STR-CLDEP sy-vline 
WA_SIN_T_LINK_STR-OWNER sy-vline 
WA_SIN_T_LINK_STR-EXPANDED sy-vline 
WA_SIN_T_LINK_STR-PROTECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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