ABAP Select data from SAP table MSQ_FILES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSQ_FILES
*  INTO TABLE @DATA(IT_MSQ_FILES2).
*--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_MSQ_FILES INDEX 1 INTO DATA(WA_MSQ_FILES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSQ_FILES>-FILEGRPNA = 1.
<MSQ_FILES>-FILEGRPDEF = 1.
<MSQ_FILES>-FGRPRDONLY = 1.
<MSQ_FILES>-LOGFILENA = 1.
<MSQ_FILES>-PHYFILENA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSQ_FILES-DEVFREE, sy-vline,
  WA_MSQ_FILES-DEVSIZE, sy-vline,
  WA_MSQ_FILES-FLSIZEMB, sy-vline,
  WA_MSQ_FILES-FLMAXSZMB, sy-vline,
  WA_MSQ_FILES-FLGRWPCT, sy-vline,
  WA_MSQ_FILES-FLGROWTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSQ_FILES 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_MSQ_FILES 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_MSQ_FILES INTO WA_MSQ_FILES.


*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_MSQ_FILES_STR, 
FILEGRPNA TYPE STRING,
FILEGRPDEF TYPE STRING,
FGRPRDONLY TYPE STRING,
LOGFILENA TYPE STRING,
PHYFILENA TYPE STRING,
DEVFREE TYPE STRING,
DEVSIZE TYPE STRING,
FLSIZEMB TYPE STRING,
FLMAXSZMB TYPE STRING,
FLGRWPCT TYPE STRING,
FLGROWTH TYPE STRING,
FLGROWMB TYPE STRING,
FLEXTENTS TYPE STRING,
FLUSDEXTS TYPE STRING,
FILEPRMRY TYPE STRING,
FLDEFDEV TYPE STRING,
FLDISKFILE TYPE STRING,
FLLOGDEV TYPE STRING,
FLWRITEBU TYPE STRING,
FLCREATEDB TYPE STRING,
FLDBCREATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSQ_FILES_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_MSQ_FILES_STR-FILEGRPNA sy-vline 
WA_MSQ_FILES_STR-FILEGRPDEF sy-vline 
WA_MSQ_FILES_STR-FGRPRDONLY sy-vline 
WA_MSQ_FILES_STR-LOGFILENA sy-vline 
WA_MSQ_FILES_STR-PHYFILENA sy-vline 
WA_MSQ_FILES_STR-DEVFREE sy-vline 
WA_MSQ_FILES_STR-DEVSIZE sy-vline 
WA_MSQ_FILES_STR-FLSIZEMB sy-vline 
WA_MSQ_FILES_STR-FLMAXSZMB sy-vline 
WA_MSQ_FILES_STR-FLGRWPCT sy-vline 
WA_MSQ_FILES_STR-FLGROWTH sy-vline 
WA_MSQ_FILES_STR-FLGROWMB sy-vline 
WA_MSQ_FILES_STR-FLEXTENTS sy-vline 
WA_MSQ_FILES_STR-FLUSDEXTS sy-vline 
WA_MSQ_FILES_STR-FILEPRMRY sy-vline 
WA_MSQ_FILES_STR-FLDEFDEV sy-vline 
WA_MSQ_FILES_STR-FLDISKFILE sy-vline 
WA_MSQ_FILES_STR-FLLOGDEV sy-vline 
WA_MSQ_FILES_STR-FLWRITEBU sy-vline 
WA_MSQ_FILES_STR-FLCREATEDB sy-vline 
WA_MSQ_FILES_STR-FLDBCREATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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