ABAP Select data from SAP table ISDBPHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISDBPHEADER
*  INTO TABLE @DATA(IT_ISDBPHEADER2).
*--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_ISDBPHEADER INDEX 1 INTO DATA(WA_ISDBPHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISDBPHEADER>-MANDT = 1.
<ISDBPHEADER>-BILLINGPLAN = 1.
<ISDBPHEADER>-BILLINGPLANCATEGORY = 1.
<ISDBPHEADER>-BILLINGPLANUSAGECATEGORY = 1.
<ISDBPHEADER>-BILLINGPLANTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISDBPHEADER-BILLINGPLANSTARTDATE, sy-vline,
  WA_ISDBPHEADER-BILLINGPLANENDDATE, sy-vline,
  WA_ISDBPHEADER-BILLINGPLANSTARTDATERULE, sy-vline,
  WA_ISDBPHEADER-BILLINGPLANENDDATERULE, sy-vline,
  WA_ISDBPHEADER-BILLINGPLANNEXTBILLINGDATERULE, sy-vline,
  WA_ISDBPHEADER-DEVIATINGBILLGDTEDETERMINERULE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISDBPHEADER 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_ISDBPHEADER 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_ISDBPHEADER INTO WA_ISDBPHEADER.


*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_ISDBPHEADER_STR, 
MANDT TYPE STRING,
BILLINGPLAN TYPE STRING,
BILLINGPLANCATEGORY TYPE STRING,
BILLINGPLANUSAGECATEGORY TYPE STRING,
BILLINGPLANTYPE TYPE STRING,
BILLINGPLANSTARTDATE TYPE STRING,
BILLINGPLANENDDATE TYPE STRING,
BILLINGPLANSTARTDATERULE TYPE STRING,
BILLINGPLANENDDATERULE TYPE STRING,
BILLINGPLANNEXTBILLINGDATERULE TYPE STRING,
DEVIATINGBILLGDTEDETERMINERULE TYPE STRING,
BILLGPLNHRZNDATEDETERMINERULE TYPE STRING,
BILLGDOCISCREATEDINADVANCE TYPE STRING,
BILLINGPLANFROMDATE TYPE STRING,
BILLINGPLANUNTILDATE TYPE STRING,
BILLINGPLANFROMDATERULE TYPE STRING,
BILLINGPLANUNTILDATERULE TYPE STRING,
CORRECTIONDATEISAUTOCREATED TYPE STRING,
BILLGDOCDATEFACTORYCALENDAR TYPE STRING,
REFERENCEBILLINGPLAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISDBPHEADER_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_ISDBPHEADER_STR-MANDT sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLAN sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANCATEGORY sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANUSAGECATEGORY sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANTYPE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANSTARTDATE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANENDDATE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANSTARTDATERULE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANENDDATERULE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANNEXTBILLINGDATERULE sy-vline 
WA_ISDBPHEADER_STR-DEVIATINGBILLGDTEDETERMINERULE sy-vline 
WA_ISDBPHEADER_STR-BILLGPLNHRZNDATEDETERMINERULE sy-vline 
WA_ISDBPHEADER_STR-BILLGDOCISCREATEDINADVANCE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANFROMDATE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANUNTILDATE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANFROMDATERULE sy-vline 
WA_ISDBPHEADER_STR-BILLINGPLANUNTILDATERULE sy-vline 
WA_ISDBPHEADER_STR-CORRECTIONDATEISAUTOCREATED sy-vline 
WA_ISDBPHEADER_STR-BILLGDOCDATEFACTORYCALENDAR sy-vline 
WA_ISDBPHEADER_STR-REFERENCEBILLINGPLAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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