ABAP Select data from SAP table PNO_SPK_CLS_ROOT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PNO_SPK_CLS_ROOT
*  INTO TABLE @DATA(IT_PNO_SPK_CLS_ROOT2).
*--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_PNO_SPK_CLS_ROOT INDEX 1 INTO DATA(WA_PNO_SPK_CLS_ROOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PNO_SPK_CLS_ROOT>-RUNID = 1.
<PNO_SPK_CLS_ROOT>-PYEAR = 1.
<PNO_SPK_CLS_ROOT>-PMONTH = 1.
<PNO_SPK_CLS_ROOT>-PCOMMENT = 1.
<PNO_SPK_CLS_ROOT>-ORGJU_TAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PNO_SPK_CLS_ROOT-TYPE, sy-vline,
  WA_PNO_SPK_CLS_ROOT-HVERS, sy-vline,
  WA_PNO_SPK_CLS_ROOT-RAPPD, sy-vline,
  WA_PNO_SPK_CLS_ROOT-ANTLJ, sy-vline,
  WA_PNO_SPK_CLS_ROOT-CSUM, sy-vline,
  WA_PNO_SPK_CLS_ROOT-LONSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PNO_SPK_CLS_ROOT 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_PNO_SPK_CLS_ROOT 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_PNO_SPK_CLS_ROOT INTO WA_PNO_SPK_CLS_ROOT.


*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_PNO_SPK_CLS_ROOT_STR, 
RUNID TYPE STRING,
PYEAR TYPE STRING,
PMONTH TYPE STRING,
PCOMMENT TYPE STRING,
ORGJU_TAB TYPE STRING,
TYPE TYPE STRING,
HVERS TYPE STRING,
RAPPD TYPE STRING,
ANTLJ TYPE STRING,
CSUM TYPE STRING,
LONSK TYPE STRING,
RUNDATE TYPE STRING,
RUNTIME TYPE STRING,
USERID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PNO_SPK_CLS_ROOT_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_PNO_SPK_CLS_ROOT_STR-RUNID sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-PYEAR sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-PMONTH sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-PCOMMENT sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-ORGJU_TAB sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-TYPE sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-HVERS sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-RAPPD sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-ANTLJ sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-CSUM sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-LONSK sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-RUNDATE sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-RUNTIME sy-vline 
WA_PNO_SPK_CLS_ROOT_STR-USERID sy-vline      INTO ld_text SEPARATED BY SPACE.

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