ABAP Select data from SAP table IMAINTOBJLINK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMAINTOBJLINK
*  INTO TABLE @DATA(IT_IMAINTOBJLINK2).
*--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_IMAINTOBJLINK INDEX 1 INTO DATA(WA_IMAINTOBJLINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMAINTOBJLINK>-MANDT = 1.
<IMAINTOBJLINK>-OBJECTLINK = 1.
<IMAINTOBJLINK>-LANGUAGE = 1.
<IMAINTOBJLINK>-OBJECTNETWORK = 1.
<IMAINTOBJLINK>-OBJECTLINKISEQUIPORFUNCNLLOC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMAINTOBJLINK-OBJLINKFROMFUNCTIONALLOCATION, sy-vline,
  WA_IMAINTOBJLINK-OBJECTLINKFROMEQUIPMENT, sy-vline,
  WA_IMAINTOBJLINK-OBJECTLINKTOFUNCTIONALLOCATION, sy-vline,
  WA_IMAINTOBJLINK-OBJECTLINKTOEQUIPMENT, sy-vline,
  WA_IMAINTOBJLINK-NUMBEROFPARALLELLINKS, sy-vline,
  WA_IMAINTOBJLINK-OBJECTLINKVALIDITYSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMAINTOBJLINK 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_IMAINTOBJLINK 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_IMAINTOBJLINK INTO WA_IMAINTOBJLINK.


*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 ALPHA, internal->external for field OBJECTLINK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINK.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TPLNR, internal->external for field OBJLINKFROMFUNCTIONALLOCATION
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJLINKFROMFUNCTIONALLOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJLINKFROMFUNCTIONALLOCATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OBJECTLINKFROMEQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINKFROMEQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINKFROMEQUIPMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field OBJECTLINKTOFUNCTIONALLOCATION
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINKTOFUNCTIONALLOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINKTOFUNCTIONALLOCATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OBJECTLINKTOEQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINKTOEQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINKTOEQUIPMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field OBJECTLINKISFUNCTIONALLOCATION
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINKISFUNCTIONALLOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINKISFUNCTIONALLOCATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OBJECTLINKISEQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-OBJECTLINKISEQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-OBJECTLINKISEQUIPMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTOBJLINK-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTOBJLINK-PRODUCT.
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_IMAINTOBJLINK_STR, 
MANDT TYPE STRING,
OBJECTLINK TYPE STRING,
LANGUAGE TYPE STRING,
OBJECTNETWORK TYPE STRING,
OBJECTLINKISEQUIPORFUNCNLLOC TYPE STRING,
OBJLINKFROMFUNCTIONALLOCATION TYPE STRING,
OBJECTLINKFROMEQUIPMENT TYPE STRING,
OBJECTLINKTOFUNCTIONALLOCATION TYPE STRING,
OBJECTLINKTOEQUIPMENT TYPE STRING,
NUMBEROFPARALLELLINKS TYPE STRING,
OBJECTLINKVALIDITYSTARTDATE TYPE STRING,
OBJECTLINKVALIDITYSTARTTIME TYPE STRING,
OBJECTLINKVALIDITYENDDATE TYPE STRING,
OBJECTLINKVALIDITYENDTIME TYPE STRING,
MAINTOBJECTINTERNALID TYPE STRING,
OBJECTLINKISFUNCTIONALLOCATION TYPE STRING,
OBJECTLINKISEQUIPMENT TYPE STRING,
OBJECTLINKMEDIUM TYPE STRING,
MAINTOBJLINKPOSSIBLERELSHPTYPE TYPE STRING,
MAINTOBJLINKUSEDRELSHPTYPE TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
OBJECTLINKISMARKEDFORDELETION TYPE STRING,
OBJECTLINKCATEGORY TYPE STRING,
PRODUCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMAINTOBJLINK_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_IMAINTOBJLINK_STR-MANDT sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINK sy-vline 
WA_IMAINTOBJLINK_STR-LANGUAGE sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTNETWORK sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKISEQUIPORFUNCNLLOC sy-vline 
WA_IMAINTOBJLINK_STR-OBJLINKFROMFUNCTIONALLOCATION sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKFROMEQUIPMENT sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKTOFUNCTIONALLOCATION sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKTOEQUIPMENT sy-vline 
WA_IMAINTOBJLINK_STR-NUMBEROFPARALLELLINKS sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKVALIDITYSTARTDATE sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKVALIDITYSTARTTIME sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKVALIDITYENDDATE sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKVALIDITYENDTIME sy-vline 
WA_IMAINTOBJLINK_STR-MAINTOBJECTINTERNALID sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKISFUNCTIONALLOCATION sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKISEQUIPMENT sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKMEDIUM sy-vline 
WA_IMAINTOBJLINK_STR-MAINTOBJLINKPOSSIBLERELSHPTYPE sy-vline 
WA_IMAINTOBJLINK_STR-MAINTOBJLINKUSEDRELSHPTYPE sy-vline 
WA_IMAINTOBJLINK_STR-CREATIONDATE sy-vline 
WA_IMAINTOBJLINK_STR-LASTCHANGEDATE sy-vline 
WA_IMAINTOBJLINK_STR-CREATEDBYUSER sy-vline 
WA_IMAINTOBJLINK_STR-LASTCHANGEDBYUSER sy-vline 
WA_IMAINTOBJLINK_STR-AUTHORIZATIONGROUP sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKISMARKEDFORDELETION sy-vline 
WA_IMAINTOBJLINK_STR-OBJECTLINKCATEGORY sy-vline 
WA_IMAINTOBJLINK_STR-PRODUCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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