ABAP Select data from SAP table BP20HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BP20HEAD 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 BP20HEAD. 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 BP20HEAD 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_BP20HEAD TYPE STANDARD TABLE OF BP20HEAD,
      WA_BP20HEAD TYPE BP20HEAD,
      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: <BP20HEAD> TYPE BP20HEAD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BP20HEAD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BP20HEAD
  INTO TABLE IT_BP20HEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BP20HEAD
*  INTO TABLE @DATA(IT_BP20HEAD2).
*--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_BP20HEAD INDEX 1 INTO DATA(WA_BP20HEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BP20HEAD ASSIGNING <BP20HEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BP20HEAD>-SDLSTRTDT = 1.
<BP20HEAD>-SDLSTRTTM = 1.
<BP20HEAD>-LASTSTRTDT = 1.
<BP20HEAD>-LASTSTRTTM = 1.
<BP20HEAD>-PREDJOB = 1.

ENDLOOP.

LOOP AT IT_BP20HEAD INTO WA_BP20HEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BP20HEAD-PREDJOBCNT, sy-vline,
  WA_BP20HEAD-CHECKSTAT, sy-vline,
  WA_BP20HEAD-EVENTID, sy-vline,
  WA_BP20HEAD-EVENTPARM, sy-vline,
  WA_BP20HEAD-PRDMINS, sy-vline,
  WA_BP20HEAD-PRDHOURS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BP20HEAD 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_BP20HEAD 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_BP20HEAD INTO WA_BP20HEAD.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BP20HEAD-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BP20HEAD-LOGSYS.
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_BP20HEAD_STR, 
SDLSTRTDT TYPE STRING,
SDLSTRTTM TYPE STRING,
LASTSTRTDT TYPE STRING,
LASTSTRTTM TYPE STRING,
PREDJOB TYPE STRING,
PREDJOBCNT TYPE STRING,
CHECKSTAT TYPE STRING,
EVENTID TYPE STRING,
EVENTPARM TYPE STRING,
PRDMINS TYPE STRING,
PRDHOURS TYPE STRING,
PRDDAYS TYPE STRING,
PRDWEEKS TYPE STRING,
PRDMONTHS TYPE STRING,
PERIODIC TYPE STRING,
CALENDARID TYPE STRING,
IMSTRTPOS TYPE STRING,
PRDBEHAV TYPE STRING,
WDAYNO TYPE STRING,
WDAYCDIR TYPE STRING,
NOTBEFORE TYPE STRING,
OPMODE TYPE STRING,
LOGSYS TYPE STRING,
OBJTYPE TYPE STRING,
OBJKEY TYPE STRING,
DESCRIBE TYPE STRING,
TSERVER TYPE STRING,
THOST TYPE STRING,
TSRVGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BP20HEAD_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_BP20HEAD_STR-SDLSTRTDT sy-vline 
WA_BP20HEAD_STR-SDLSTRTTM sy-vline 
WA_BP20HEAD_STR-LASTSTRTDT sy-vline 
WA_BP20HEAD_STR-LASTSTRTTM sy-vline 
WA_BP20HEAD_STR-PREDJOB sy-vline 
WA_BP20HEAD_STR-PREDJOBCNT sy-vline 
WA_BP20HEAD_STR-CHECKSTAT sy-vline 
WA_BP20HEAD_STR-EVENTID sy-vline 
WA_BP20HEAD_STR-EVENTPARM sy-vline 
WA_BP20HEAD_STR-PRDMINS sy-vline 
WA_BP20HEAD_STR-PRDHOURS sy-vline 
WA_BP20HEAD_STR-PRDDAYS sy-vline 
WA_BP20HEAD_STR-PRDWEEKS sy-vline 
WA_BP20HEAD_STR-PRDMONTHS sy-vline 
WA_BP20HEAD_STR-PERIODIC sy-vline 
WA_BP20HEAD_STR-CALENDARID sy-vline 
WA_BP20HEAD_STR-IMSTRTPOS sy-vline 
WA_BP20HEAD_STR-PRDBEHAV sy-vline 
WA_BP20HEAD_STR-WDAYNO sy-vline 
WA_BP20HEAD_STR-WDAYCDIR sy-vline 
WA_BP20HEAD_STR-NOTBEFORE sy-vline 
WA_BP20HEAD_STR-OPMODE sy-vline 
WA_BP20HEAD_STR-LOGSYS sy-vline 
WA_BP20HEAD_STR-OBJTYPE sy-vline 
WA_BP20HEAD_STR-OBJKEY sy-vline 
WA_BP20HEAD_STR-DESCRIBE sy-vline 
WA_BP20HEAD_STR-TSERVER sy-vline 
WA_BP20HEAD_STR-THOST sy-vline 
WA_BP20HEAD_STR-TSRVGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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