ABAP Select data from SAP table MFLE_DBPROTO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MFLE_DBPROTO
*  INTO TABLE @DATA(IT_MFLE_DBPROTO2).
*--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_MFLE_DBPROTO INDEX 1 INTO DATA(WA_MFLE_DBPROTO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MFLE_DBPROTO>-CREA_TIME = 1.
<MFLE_DBPROTO>-GUID = 1.
<MFLE_DBPROTO>-MODUL = 1.
<MFLE_DBPROTO>-TABNAM = 1.
<MFLE_DBPROTO>-FIELD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MFLE_DBPROTO-WAIT_TIME, sy-vline,
  WA_MFLE_DBPROTO-THRESHOLD, sy-vline,
  WA_MFLE_DBPROTO-ALLOC_LIMIT, sy-vline,
  WA_MFLE_DBPROTO-TOT_MEM_USED, sy-vline,
  WA_MFLE_DBPROTO-PROC_ENTRIES, sy-vline,
  WA_MFLE_DBPROTO-PACKAGE_SIZE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MFLE_DBPROTO 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_MFLE_DBPROTO 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_MFLE_DBPROTO INTO WA_MFLE_DBPROTO.


*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 TSTLC, internal->external for field CREA_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_MFLE_DBPROTO-CREA_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MFLE_DBPROTO-CREA_TIME.
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_MFLE_DBPROTO_STR, 
CREA_TIME TYPE STRING,
GUID TYPE STRING,
MODUL TYPE STRING,
TABNAM TYPE STRING,
FIELD TYPE STRING,
WAIT_TIME TYPE STRING,
THRESHOLD TYPE STRING,
ALLOC_LIMIT TYPE STRING,
TOT_MEM_USED TYPE STRING,
PROC_ENTRIES TYPE STRING,
PACKAGE_SIZE TYPE STRING,
ENTRY_PER_SEC TYPE STRING,
TSTMP_DIFF TYPE STRING,
CX_SQL_EXCEPTION TYPE STRING,
DB_ERROR TYPE STRING,
SQL_CODE TYPE STRING,
SQL_MESSAGE TYPE STRING,
DBOBJECT_EXISTS TYPE STRING,
DBOBJECT_NOT_EXISTS TYPE STRING,
DUPLICATE_KEY TYPE STRING,
INTERNAL_ERROR TYPE STRING,
INVALID_CURSOR TYPE STRING,
UNKNOWN_CONNECTION TYPE STRING,
CONNECTION_OPEN_ERROR TYPE STRING,
CONNECTION_CLOSED TYPE STRING,
EXTERNAL_ERROR TYPE STRING,
NO_MORE_MEMORY TYPE STRING,
CX_PARAMETER_INVALID TYPE STRING,
PARAM TYPE STRING,
SQL_STMNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MFLE_DBPROTO_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_MFLE_DBPROTO_STR-CREA_TIME sy-vline 
WA_MFLE_DBPROTO_STR-GUID sy-vline 
WA_MFLE_DBPROTO_STR-MODUL sy-vline 
WA_MFLE_DBPROTO_STR-TABNAM sy-vline 
WA_MFLE_DBPROTO_STR-FIELD sy-vline 
WA_MFLE_DBPROTO_STR-WAIT_TIME sy-vline 
WA_MFLE_DBPROTO_STR-THRESHOLD sy-vline 
WA_MFLE_DBPROTO_STR-ALLOC_LIMIT sy-vline 
WA_MFLE_DBPROTO_STR-TOT_MEM_USED sy-vline 
WA_MFLE_DBPROTO_STR-PROC_ENTRIES sy-vline 
WA_MFLE_DBPROTO_STR-PACKAGE_SIZE sy-vline 
WA_MFLE_DBPROTO_STR-ENTRY_PER_SEC sy-vline 
WA_MFLE_DBPROTO_STR-TSTMP_DIFF sy-vline 
WA_MFLE_DBPROTO_STR-CX_SQL_EXCEPTION sy-vline 
WA_MFLE_DBPROTO_STR-DB_ERROR sy-vline 
WA_MFLE_DBPROTO_STR-SQL_CODE sy-vline 
WA_MFLE_DBPROTO_STR-SQL_MESSAGE sy-vline 
WA_MFLE_DBPROTO_STR-DBOBJECT_EXISTS sy-vline 
WA_MFLE_DBPROTO_STR-DBOBJECT_NOT_EXISTS sy-vline 
WA_MFLE_DBPROTO_STR-DUPLICATE_KEY sy-vline 
WA_MFLE_DBPROTO_STR-INTERNAL_ERROR sy-vline 
WA_MFLE_DBPROTO_STR-INVALID_CURSOR sy-vline 
WA_MFLE_DBPROTO_STR-UNKNOWN_CONNECTION sy-vline 
WA_MFLE_DBPROTO_STR-CONNECTION_OPEN_ERROR sy-vline 
WA_MFLE_DBPROTO_STR-CONNECTION_CLOSED sy-vline 
WA_MFLE_DBPROTO_STR-EXTERNAL_ERROR sy-vline 
WA_MFLE_DBPROTO_STR-NO_MORE_MEMORY sy-vline 
WA_MFLE_DBPROTO_STR-CX_PARAMETER_INVALID sy-vline 
WA_MFLE_DBPROTO_STR-PARAM sy-vline 
WA_MFLE_DBPROTO_STR-SQL_STMNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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