ABAP Select data from SAP table EMDUSRQDB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EMDUSRQDB
*  INTO TABLE @DATA(IT_EMDUSRQDB2).
*--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_EMDUSRQDB INDEX 1 INTO DATA(WA_EMDUSRQDB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EMDUSRQDB>-HEAD = 1.
<EMDUSRQDB>-MANDT = 1.
<EMDUSRQDB>-MDUSREQUESTID = 1.
<EMDUSRQDB>-PROCESS = 1.
<EMDUSRQDB>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EMDUSRQDB-PRIORITY, sy-vline,
  WA_EMDUSRQDB-TIMEZONE, sy-vline,
  WA_EMDUSRQDB-ANLAGE, sy-vline,
  WA_EMDUSRQDB-ABRDATS, sy-vline,
  WA_EMDUSRQDB-ABRVORG, sy-vline,
  WA_EMDUSRQDB-MDUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EMDUSRQDB 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_EMDUSRQDB 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_EMDUSRQDB INTO WA_EMDUSRQDB.


*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 ALPHA, internal->external for field ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMDUSRQDB-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMDUSRQDB-ANLAGE.
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_EMDUSRQDB_STR, 
HEAD TYPE STRING,
MANDT TYPE STRING,
MDUSREQUESTID TYPE STRING,
PROCESS TYPE STRING,
STATUS TYPE STRING,
PRIORITY TYPE STRING,
TIMEZONE TYPE STRING,
ANLAGE TYPE STRING,
ABRDATS TYPE STRING,
ABRVORG TYPE STRING,
MDUS TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
ITEM_TAB TYPE STRING,
INPUT_TAB TYPE STRING,
EXCL_TAB TYPE STRING,
RESULT_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EMDUSRQDB_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_EMDUSRQDB_STR-HEAD sy-vline 
WA_EMDUSRQDB_STR-MANDT sy-vline 
WA_EMDUSRQDB_STR-MDUSREQUESTID sy-vline 
WA_EMDUSRQDB_STR-PROCESS sy-vline 
WA_EMDUSRQDB_STR-STATUS sy-vline 
WA_EMDUSRQDB_STR-PRIORITY sy-vline 
WA_EMDUSRQDB_STR-TIMEZONE sy-vline 
WA_EMDUSRQDB_STR-ANLAGE sy-vline 
WA_EMDUSRQDB_STR-ABRDATS sy-vline 
WA_EMDUSRQDB_STR-ABRVORG sy-vline 
WA_EMDUSRQDB_STR-MDUS sy-vline 
WA_EMDUSRQDB_STR-ERDAT sy-vline 
WA_EMDUSRQDB_STR-ERNAM sy-vline 
WA_EMDUSRQDB_STR-AEDAT sy-vline 
WA_EMDUSRQDB_STR-AENAM sy-vline 
WA_EMDUSRQDB_STR-ITEM_TAB sy-vline 
WA_EMDUSRQDB_STR-INPUT_TAB sy-vline 
WA_EMDUSRQDB_STR-EXCL_TAB sy-vline 
WA_EMDUSRQDB_STR-RESULT_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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