ABAP Select data from SAP table ISRVDOCHEADNOTE 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 ISRVDOCHEADNOTE 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 ISRVDOCHEADNOTE. 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 ISRVDOCHEADNOTE 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_ISRVDOCHEADNOTE TYPE STANDARD TABLE OF ISRVDOCHEADNOTE,
      WA_ISRVDOCHEADNOTE TYPE ISRVDOCHEADNOTE,
      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: <ISRVDOCHEADNOTE> TYPE ISRVDOCHEADNOTE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISRVDOCHEADNOTE
*  INTO TABLE @DATA(IT_ISRVDOCHEADNOTE2).
*--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_ISRVDOCHEADNOTE INDEX 1 INTO DATA(WA_ISRVDOCHEADNOTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISRVDOCHEADNOTE>-MANDT = 1.
<ISRVDOCHEADNOTE>-TEXTOBJECTKEY = 1.
<ISRVDOCHEADNOTE>-TEXTOBJECTTYPE = 1.
<ISRVDOCHEADNOTE>-TEXTOBJECTCATEGORY = 1.
<ISRVDOCHEADNOTE>-LANGUAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISRVDOCHEADNOTE-SERVICEDOCUMENTUUID, sy-vline,
  WA_ISRVDOCHEADNOTE-SERVICEORDERUUID, sy-vline,
  WA_ISRVDOCHEADNOTE-CREATEDBYUSER, sy-vline,
  WA_ISRVDOCHEADNOTE-CREATIONDATE, sy-vline,
  WA_ISRVDOCHEADNOTE-CREATIONTIME, sy-vline,
  WA_ISRVDOCHEADNOTE-LASTCHANGEDBYUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISRVDOCHEADNOTE 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_ISRVDOCHEADNOTE 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_ISRVDOCHEADNOTE INTO WA_ISRVDOCHEADNOTE.


*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 ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ISRVDOCHEADNOTE-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISRVDOCHEADNOTE-LANGUAGE.
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_ISRVDOCHEADNOTE_STR, 
MANDT TYPE STRING,
TEXTOBJECTKEY TYPE STRING,
TEXTOBJECTTYPE TYPE STRING,
TEXTOBJECTCATEGORY TYPE STRING,
LANGUAGE TYPE STRING,
SERVICEDOCUMENTUUID TYPE STRING,
SERVICEORDERUUID TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,
SERVICEORDERNOTETEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISRVDOCHEADNOTE_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_ISRVDOCHEADNOTE_STR-MANDT sy-vline 
WA_ISRVDOCHEADNOTE_STR-TEXTOBJECTKEY sy-vline 
WA_ISRVDOCHEADNOTE_STR-TEXTOBJECTTYPE sy-vline 
WA_ISRVDOCHEADNOTE_STR-TEXTOBJECTCATEGORY sy-vline 
WA_ISRVDOCHEADNOTE_STR-LANGUAGE sy-vline 
WA_ISRVDOCHEADNOTE_STR-SERVICEDOCUMENTUUID sy-vline 
WA_ISRVDOCHEADNOTE_STR-SERVICEORDERUUID sy-vline 
WA_ISRVDOCHEADNOTE_STR-CREATEDBYUSER sy-vline 
WA_ISRVDOCHEADNOTE_STR-CREATIONDATE sy-vline 
WA_ISRVDOCHEADNOTE_STR-CREATIONTIME sy-vline 
WA_ISRVDOCHEADNOTE_STR-LASTCHANGEDBYUSER sy-vline 
WA_ISRVDOCHEADNOTE_STR-LASTCHANGEDATE sy-vline 
WA_ISRVDOCHEADNOTE_STR-LASTCHANGETIME sy-vline 
WA_ISRVDOCHEADNOTE_STR-SERVICEORDERNOTETEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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