ABAP Select data from SAP table DBAN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DBAN
*  INTO TABLE @DATA(IT_DBAN2).
*--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_DBAN INDEX 1 INTO DATA(WA_DBAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DBAN>-SYSID = 1.
<DBAN>-ID = 1.
<DBAN>-STATE = 1.
<DBAN>-DBNAME = 1.
<DBAN>-DBNODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DBAN-RUNDIR, sy-vline,
  WA_DBAN-CONFIG, sy-vline,
  WA_DBAN-PROT, sy-vline,
  WA_DBAN-INTERV, sy-vline,
  WA_DBAN-RECONN, sy-vline,
  WA_DBAN-PROC_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DBAN 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_DBAN 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_DBAN INTO WA_DBAN.


*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_DBAN_STR, 
SYSID TYPE STRING,
ID TYPE STRING,
STATE TYPE STRING,
DBNAME TYPE STRING,
DBNODE TYPE STRING,
RUNDIR TYPE STRING,
CONFIG TYPE STRING,
PROT TYPE STRING,
INTERV TYPE STRING,
RECONN TYPE STRING,
PROC_ID TYPE STRING,
SESS_ID TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
RES1 TYPE STRING,
RES2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DBAN_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_DBAN_STR-SYSID sy-vline 
WA_DBAN_STR-ID sy-vline 
WA_DBAN_STR-STATE sy-vline 
WA_DBAN_STR-DBNAME sy-vline 
WA_DBAN_STR-DBNODE sy-vline 
WA_DBAN_STR-RUNDIR sy-vline 
WA_DBAN_STR-CONFIG sy-vline 
WA_DBAN_STR-PROT sy-vline 
WA_DBAN_STR-INTERV sy-vline 
WA_DBAN_STR-RECONN sy-vline 
WA_DBAN_STR-PROC_ID sy-vline 
WA_DBAN_STR-SESS_ID sy-vline 
WA_DBAN_STR-DATUM sy-vline 
WA_DBAN_STR-ZEIT sy-vline 
WA_DBAN_STR-RES1 sy-vline 
WA_DBAN_STR-RES2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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