ABAP Select data from SAP table PCVDOCOBJLINK into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PCVDOCOBJLINK 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 PCVDOCOBJLINK. 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 PCVDOCOBJLINK 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_PCVDOCOBJLINK TYPE STANDARD TABLE OF PCVDOCOBJLINK,
      WA_PCVDOCOBJLINK TYPE PCVDOCOBJLINK,
      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: <PCVDOCOBJLINK> TYPE PCVDOCOBJLINK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCVDOCOBJLINK
*  INTO TABLE @DATA(IT_PCVDOCOBJLINK2).
*--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_PCVDOCOBJLINK INDEX 1 INTO DATA(WA_PCVDOCOBJLINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCVDOCOBJLINK>-MANDT = 1.
<PCVDOCOBJLINK>-DOCUMENTINFORECORDDOCTYPE = 1.
<PCVDOCOBJLINK>-DOCUMENTINFORECORDDOCNUMBER = 1.
<PCVDOCOBJLINK>-DOCUMENTINFORECORDDOCVERSION = 1.
<PCVDOCOBJLINK>-DOCUMENTINFORECORDDOCPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCVDOCOBJLINK-LINKEDSAPOBJECT, sy-vline,
  WA_PCVDOCOBJLINK-LINKEDSAPOBJECTKEY, sy-vline,
  WA_PCVDOCOBJLINK-DOCOBJECTLINKCOUNTER, sy-vline,
  WA_PCVDOCOBJLINK-CREATIONDATETIME, sy-vline,
  WA_PCVDOCOBJLINK-CREATEDBYUSER, sy-vline,
  WA_PCVDOCOBJLINK-CHANGEDDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCVDOCOBJLINK 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_PCVDOCOBJLINK 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_PCVDOCOBJLINK INTO WA_PCVDOCOBJLINK.


*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 DOCUMENTINFORECORDDOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCVDOCOBJLINK-DOCUMENTINFORECORDDOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCVDOCOBJLINK-DOCUMENTINFORECORDDOCNUMBER.
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_PCVDOCOBJLINK_STR, 
MANDT TYPE STRING,
DOCUMENTINFORECORDDOCTYPE TYPE STRING,
DOCUMENTINFORECORDDOCNUMBER TYPE STRING,
DOCUMENTINFORECORDDOCVERSION TYPE STRING,
DOCUMENTINFORECORDDOCPART TYPE STRING,
LINKEDSAPOBJECT TYPE STRING,
LINKEDSAPOBJECTKEY TYPE STRING,
DOCOBJECTLINKCOUNTER TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CHANGEDDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
DOCINFORECDLINKSTATUS TYPE STRING,
DOCINFORECDOBJECTLINKSTATUS TYPE STRING,
OBJECTTYPEDATABASETABLE TYPE STRING,
DOCINFORECDADDITIONALOBJECTKEY TYPE STRING,
DOCLINKDIRECTIONISACTIVE TYPE STRING,
ISDEFAULTDOCUMENT TYPE STRING,
DOCINFORECDISMARKEDFORDELETION TYPE STRING,
DOCINFORECDLONGTEXTUUID TYPE STRING,
ISDOCINFORECDCREATEDFROMCAD TYPE STRING,
DOCINFORECDCONFIGNMGMTFIXED TYPE STRING,
ISARCHIVED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCVDOCOBJLINK_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_PCVDOCOBJLINK_STR-MANDT sy-vline 
WA_PCVDOCOBJLINK_STR-DOCUMENTINFORECORDDOCTYPE sy-vline 
WA_PCVDOCOBJLINK_STR-DOCUMENTINFORECORDDOCNUMBER sy-vline 
WA_PCVDOCOBJLINK_STR-DOCUMENTINFORECORDDOCVERSION sy-vline 
WA_PCVDOCOBJLINK_STR-DOCUMENTINFORECORDDOCPART sy-vline 
WA_PCVDOCOBJLINK_STR-LINKEDSAPOBJECT sy-vline 
WA_PCVDOCOBJLINK_STR-LINKEDSAPOBJECTKEY sy-vline 
WA_PCVDOCOBJLINK_STR-DOCOBJECTLINKCOUNTER sy-vline 
WA_PCVDOCOBJLINK_STR-CREATIONDATETIME sy-vline 
WA_PCVDOCOBJLINK_STR-CREATEDBYUSER sy-vline 
WA_PCVDOCOBJLINK_STR-CHANGEDDATETIME sy-vline 
WA_PCVDOCOBJLINK_STR-LASTCHANGEDBYUSER sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDLINKSTATUS sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDOBJECTLINKSTATUS sy-vline 
WA_PCVDOCOBJLINK_STR-OBJECTTYPEDATABASETABLE sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDADDITIONALOBJECTKEY sy-vline 
WA_PCVDOCOBJLINK_STR-DOCLINKDIRECTIONISACTIVE sy-vline 
WA_PCVDOCOBJLINK_STR-ISDEFAULTDOCUMENT sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDISMARKEDFORDELETION sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDLONGTEXTUUID sy-vline 
WA_PCVDOCOBJLINK_STR-ISDOCINFORECDCREATEDFROMCAD sy-vline 
WA_PCVDOCOBJLINK_STR-DOCINFORECDCONFIGNMGMTFIXED sy-vline 
WA_PCVDOCOBJLINK_STR-ISARCHIVED sy-vline      INTO ld_text SEPARATED BY SPACE.

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