ABAP Select data from SAP table DB6_VIEW_COMMON_MAINT_WINDOW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6_VIEW_COMMON_MAINT_WINDOW 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 DB6_VIEW_COMMON_MAINT_WINDOW. 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 DB6_VIEW_COMMON_MAINT_WINDOW 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_DB6_VIEW_COMMON_MAINT_WINDOW TYPE STANDARD TABLE OF DB6_VIEW_COMMON_MAINT_WINDOW,
      WA_DB6_VIEW_COMMON_MAINT_WINDOW TYPE DB6_VIEW_COMMON_MAINT_WINDOW,
      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: <DB6_VIEW_COMMON_MAINT_WINDOW> TYPE DB6_VIEW_COMMON_MAINT_WINDOW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6_VIEW_COMMON_MAINT_WINDOW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6_VIEW_COMMON_MAINT_WINDOW
  INTO TABLE IT_DB6_VIEW_COMMON_MAINT_WINDOW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6_VIEW_COMMON_MAINT_WINDOW
*  INTO TABLE @DATA(IT_DB6_VIEW_COMMON_MAINT_WINDOW2).
*--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_DB6_VIEW_COMMON_MAINT_WINDOW INDEX 1 INTO DATA(WA_DB6_VIEW_COMMON_MAINT_WINDOW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6_VIEW_COMMON_MAINT_WINDOW ASSIGNING <DB6_VIEW_COMMON_MAINT_WINDOW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6_VIEW_COMMON_MAINT_WINDOW>-WINDOW_ENABLED = 1.
<DB6_VIEW_COMMON_MAINT_WINDOW>-WINDOW_ENABLED_TEXT = 1.
<DB6_VIEW_COMMON_MAINT_WINDOW>-RB_TIME = 1.
<DB6_VIEW_COMMON_MAINT_WINDOW>-TIME_DURING = 1.
<DB6_VIEW_COMMON_MAINT_WINDOW>-TIME_OUTSIDE = 1.

ENDLOOP.

LOOP AT IT_DB6_VIEW_COMMON_MAINT_WINDOW INTO WA_DB6_VIEW_COMMON_MAINT_WINDOW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6_VIEW_COMMON_MAINT_WINDOW-TIME_ENABLED, sy-vline,
  WA_DB6_VIEW_COMMON_MAINT_WINDOW-TIME_START, sy-vline,
  WA_DB6_VIEW_COMMON_MAINT_WINDOW-TIME_END, sy-vline,
  WA_DB6_VIEW_COMMON_MAINT_WINDOW-DOW_ALL, sy-vline,
  WA_DB6_VIEW_COMMON_MAINT_WINDOW-DOW_SUNDAY, sy-vline,
  WA_DB6_VIEW_COMMON_MAINT_WINDOW-DOW_MONDAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6_VIEW_COMMON_MAINT_WINDOW 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_DB6_VIEW_COMMON_MAINT_WINDOW 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_DB6_VIEW_COMMON_MAINT_WINDOW INTO WA_DB6_VIEW_COMMON_MAINT_WINDOW.


*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_DB6_VIEW_COMMON_MAINT_WINDOW_STR, 
WINDOW_ENABLED TYPE STRING,
WINDOW_ENABLED_TEXT TYPE STRING,
RB_TIME TYPE STRING,
TIME_DURING TYPE STRING,
TIME_OUTSIDE TYPE STRING,
TIME_ENABLED TYPE STRING,
TIME_START TYPE STRING,
TIME_END TYPE STRING,
DOW_ALL TYPE STRING,
DOW_SUNDAY TYPE STRING,
DOW_MONDAY TYPE STRING,
DOW_TUESDAY TYPE STRING,
DOW_WEDNESDAY TYPE STRING,
DOW_THURSDAY TYPE STRING,
DOW_FRIDAY TYPE STRING,
DOW_SATURDAY TYPE STRING,
DOM_ALL TYPE STRING,
DOM_FILTER_STRING TYPE STRING,
DOM_LAST TYPE STRING,
MOY_ALL TYPE STRING,
MOY_JAN TYPE STRING,
MOY_FEB TYPE STRING,
MOY_MAR TYPE STRING,
MOY_APR TYPE STRING,
MOY_MAY TYPE STRING,
MOY_JUN TYPE STRING,
MOY_JUL TYPE STRING,
MOY_AUG TYPE STRING,
MOY_SEP TYPE STRING,
MOY_OCT TYPE STRING,
MOY_NOV TYPE STRING,
MOY_DEC TYPE STRING,
TIME_ZONE TYPE STRING,
USED_BY_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6_VIEW_COMMON_MAINT_WINDOW_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_DB6_VIEW_COMMON_MAINT_WINDOW_STR-WINDOW_ENABLED sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-WINDOW_ENABLED_TEXT sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-RB_TIME sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_DURING sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_OUTSIDE sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_ENABLED sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_START sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_END sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_ALL sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_SUNDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_MONDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_TUESDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_WEDNESDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_THURSDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_FRIDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOW_SATURDAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOM_ALL sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOM_FILTER_STRING sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-DOM_LAST sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_ALL sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_JAN sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_FEB sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_MAR sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_APR sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_MAY sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_JUN sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_JUL sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_AUG sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_SEP sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_OCT sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_NOV sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-MOY_DEC sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-TIME_ZONE sy-vline 
WA_DB6_VIEW_COMMON_MAINT_WINDOW_STR-USED_BY_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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