ABAP Select data from SAP table SIQ_XCHG_DBFILE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIQ_XCHG_DBFILE
*  INTO TABLE @DATA(IT_SIQ_XCHG_DBFILE2).
*--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_SIQ_XCHG_DBFILE INDEX 1 INTO DATA(WA_SIQ_XCHG_DBFILE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIQ_XCHG_DBFILE>-DBFILES = 1.
<SIQ_XCHG_DBFILE>-DBSPACENAME = 1.
<SIQ_XCHG_DBFILE>-DBFILENAME = 1.
<SIQ_XCHG_DBFILE>-PATH = 1.
<SIQ_XCHG_DBFILE>-SEGMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIQ_XCHG_DBFILE-RWMODE, sy-vline,
  WA_SIQ_XCHG_DBFILE-DBFONLINE, sy-vline,
  WA_SIQ_XCHG_DBFILE-PERCENTUSED, sy-vline,
  WA_SIQ_XCHG_DBFILE-DBFILESIZE, sy-vline,
  WA_SIQ_XCHG_DBFILE-RESERVESIZE, sy-vline,
  WA_SIQ_XCHG_DBFILE-STRIPESIZE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SIQ_XCHG_DBFILE 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_SIQ_XCHG_DBFILE 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_SIQ_XCHG_DBFILE INTO WA_SIQ_XCHG_DBFILE.


*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_SIQ_XCHG_DBFILE_STR, 
DBFILES TYPE STRING,
DBSPACENAME TYPE STRING,
DBFILENAME TYPE STRING,
PATH TYPE STRING,
SEGMENTTYPE TYPE STRING,
RWMODE TYPE STRING,
DBFONLINE TYPE STRING,
PERCENTUSED TYPE STRING,
DBFILESIZE TYPE STRING,
RESERVESIZE TYPE STRING,
STRIPESIZE TYPE STRING,
BLKTYPES TYPE STRING,
FIRSTBLK TYPE STRING,
LASTBLK TYPE STRING,
OKTODROP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIQ_XCHG_DBFILE_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_SIQ_XCHG_DBFILE_STR-DBFILES sy-vline 
WA_SIQ_XCHG_DBFILE_STR-DBSPACENAME sy-vline 
WA_SIQ_XCHG_DBFILE_STR-DBFILENAME sy-vline 
WA_SIQ_XCHG_DBFILE_STR-PATH sy-vline 
WA_SIQ_XCHG_DBFILE_STR-SEGMENTTYPE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-RWMODE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-DBFONLINE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-PERCENTUSED sy-vline 
WA_SIQ_XCHG_DBFILE_STR-DBFILESIZE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-RESERVESIZE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-STRIPESIZE sy-vline 
WA_SIQ_XCHG_DBFILE_STR-BLKTYPES sy-vline 
WA_SIQ_XCHG_DBFILE_STR-FIRSTBLK sy-vline 
WA_SIQ_XCHG_DBFILE_STR-LASTBLK sy-vline 
WA_SIQ_XCHG_DBFILE_STR-OKTODROP sy-vline      INTO ld_text SEPARATED BY SPACE.

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