ABAP Select data from SAP table YIS_ONLDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM YIS_ONLDOC
*  INTO TABLE @DATA(IT_YIS_ONLDOC2).
*--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_YIS_ONLDOC INDEX 1 INTO DATA(WA_YIS_ONLDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<YIS_ONLDOC>-RELINS = 1.
<YIS_ONLDOC>-RELCUT = 1.
<YIS_ONLDOC>-RELCHA = 1.
<YIS_ONLDOC>-ORGDAT = 1.
<YIS_ONLDOC>-PUDETI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_YIS_ONLDOC-ORGIMP, sy-vline,
  WA_YIS_ONLDOC-ORGINF, sy-vline,
  WA_YIS_ONLDOC-OWNER, sy-vline,
  WA_YIS_ONLDOC-PROJECT, sy-vline,
  WA_YIS_ONLDOC-STDPROJ, sy-vline,
  WA_YIS_ONLDOC-R3DATA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_YIS_ONLDOC 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_YIS_ONLDOC 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_YIS_ONLDOC INTO WA_YIS_ONLDOC.


*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 YIUSE, internal->external for field PROCESSES
CALL FUNCTION 'CONVERSION_EXIT_YIUSE_OUTPUT'
  EXPORTING
    input =                      WA_YIS_ONLDOC-PROCESSES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIS_ONLDOC-PROCESSES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit YIUSE, internal->external for field COURSES
CALL FUNCTION 'CONVERSION_EXIT_YIUSE_OUTPUT'
  EXPORTING
    input =                      WA_YIS_ONLDOC-COURSES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIS_ONLDOC-COURSES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit YIUSE, internal->external for field EXAMPLES
CALL FUNCTION 'CONVERSION_EXIT_YIUSE_OUTPUT'
  EXPORTING
    input =                      WA_YIS_ONLDOC-EXAMPLES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIS_ONLDOC-EXAMPLES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit YIUSE, internal->external for field RELEASE_NOTES
CALL FUNCTION 'CONVERSION_EXIT_YIUSE_OUTPUT'
  EXPORTING
    input =                      WA_YIS_ONLDOC-RELEASE_NOTES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIS_ONLDOC-RELEASE_NOTES.
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_YIS_ONLDOC_STR, 
RELINS TYPE STRING,
RELCUT TYPE STRING,
RELCHA TYPE STRING,
ORGDAT TYPE STRING,
PUDETI TYPE STRING,
ORGIMP TYPE STRING,
ORGINF TYPE STRING,
OWNER TYPE STRING,
PROJECT TYPE STRING,
STDPROJ TYPE STRING,
R3DATA TYPE STRING,
DO_NO_DISPLAY_AGAIN TYPE STRING,
NAME_AIO TYPE STRING,
PROCESSES TYPE STRING,
COURSES TYPE STRING,
EXAMPLES TYPE STRING,
RELEASE_NOTES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_YIS_ONLDOC_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_YIS_ONLDOC_STR-RELINS sy-vline 
WA_YIS_ONLDOC_STR-RELCUT sy-vline 
WA_YIS_ONLDOC_STR-RELCHA sy-vline 
WA_YIS_ONLDOC_STR-ORGDAT sy-vline 
WA_YIS_ONLDOC_STR-PUDETI sy-vline 
WA_YIS_ONLDOC_STR-ORGIMP sy-vline 
WA_YIS_ONLDOC_STR-ORGINF sy-vline 
WA_YIS_ONLDOC_STR-OWNER sy-vline 
WA_YIS_ONLDOC_STR-PROJECT sy-vline 
WA_YIS_ONLDOC_STR-STDPROJ sy-vline 
WA_YIS_ONLDOC_STR-R3DATA sy-vline 
WA_YIS_ONLDOC_STR-DO_NO_DISPLAY_AGAIN sy-vline 
WA_YIS_ONLDOC_STR-NAME_AIO sy-vline 
WA_YIS_ONLDOC_STR-PROCESSES sy-vline 
WA_YIS_ONLDOC_STR-COURSES sy-vline 
WA_YIS_ONLDOC_STR-EXAMPLES sy-vline 
WA_YIS_ONLDOC_STR-RELEASE_NOTES sy-vline      INTO ld_text SEPARATED BY SPACE.

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