ABAP Select data from SAP table /SCWM/S_MQ_QUEUE_BASE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/S_MQ_QUEUE_BASE 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 /SCWM/S_MQ_QUEUE_BASE. 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 /SCWM/S_MQ_QUEUE_BASE 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_/SCWM/S_MQ_QUEUE_BASE TYPE STANDARD TABLE OF /SCWM/S_MQ_QUEUE_BASE,
      WA_/SCWM/S_MQ_QUEUE_BASE TYPE /SCWM/S_MQ_QUEUE_BASE,
      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: </SCWM/S_MQ_QUEUE_BASE> TYPE /SCWM/S_MQ_QUEUE_BASE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/S_MQ_QUEUE_BASE
  INTO TABLE IT_/SCWM/S_MQ_QUEUE_BASE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_MQ_QUEUE_BASE
*  INTO TABLE @DATA(IT_/SCWM/S_MQ_QUEUE_BASE2).
*--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_/SCWM/S_MQ_QUEUE_BASE INDEX 1 INTO DATA(WA_/SCWM/S_MQ_QUEUE_BASE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/S_MQ_QUEUE_BASE ASSIGNING </SCWM/S_MQ_QUEUE_BASE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_MQ_QUEUE_BASE>-QRFCFNAM = 1.
</SCWM/S_MQ_QUEUE_BASE>-QNAME = 1.
</SCWM/S_MQ_QUEUE_BASE>-MQDEFINITION = 1.
</SCWM/S_MQ_QUEUE_BASE>-MQDEF_DESCR = 1.
</SCWM/S_MQ_QUEUE_BASE>-ERRMESS = 1.

ENDLOOP.

LOOP AT IT_/SCWM/S_MQ_QUEUE_BASE INTO WA_/SCWM/S_MQ_QUEUE_BASE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_MQ_QUEUE_BASE-MSGID, sy-vline,
  WA_/SCWM/S_MQ_QUEUE_BASE-MSGNO, sy-vline,
  WA_/SCWM/S_MQ_QUEUE_BASE-QUEUE_SRC_SYSTEM, sy-vline,
  WA_/SCWM/S_MQ_QUEUE_BASE-QCOUNT, sy-vline,
  WA_/SCWM/S_MQ_QUEUE_BASE-DEST, sy-vline,
  WA_/SCWM/S_MQ_QUEUE_BASE-QSTATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_MQ_QUEUE_BASE 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_/SCWM/S_MQ_QUEUE_BASE 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_/SCWM/S_MQ_QUEUE_BASE INTO WA_/SCWM/S_MQ_QUEUE_BASE.


*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 QUEUE_SRC_SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MQ_QUEUE_BASE-QUEUE_SRC_SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MQ_QUEUE_BASE-QUEUE_SRC_SYSTEM.
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_/SCWM/S_MQ_QUEUE_BASE_STR, 
QRFCFNAM TYPE STRING,
QNAME TYPE STRING,
MQDEFINITION TYPE STRING,
MQDEF_DESCR TYPE STRING,
ERRMESS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
QUEUE_SRC_SYSTEM TYPE STRING,
QCOUNT TYPE STRING,
DEST TYPE STRING,
QSTATE TYPE STRING,
CREADATE TYPE STRING,
CREATIME TYPE STRING,
QRFCUSER TYPE STRING,
RETRYNR TYPE STRING,
MSGTYPE TYPE STRING,
WQNAME TYPE STRING,
ARFCIPID TYPE STRING,
ARFCPID TYPE STRING,
ARFCTIME TYPE STRING,
ARFCTIDCNT TYPE STRING,
TID TYPE STRING,
ORGTID TYPE STRING,
QLUWCNT TYPE STRING,
TZONE TYPE STRING,
ENTRIES_IN_QUEUE TYPE STRING,
PAYLOAD_SIZE TYPE STRING,
ERP_IND TYPE STRING,
ALERTED TYPE STRING,
APPL_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_MQ_QUEUE_BASE_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_/SCWM/S_MQ_QUEUE_BASE_STR-QRFCFNAM sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QNAME sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-MQDEFINITION sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-MQDEF_DESCR sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ERRMESS sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-MSGID sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-MSGNO sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QUEUE_SRC_SYSTEM sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QCOUNT sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-DEST sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QSTATE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-CREADATE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-CREATIME sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QRFCUSER sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-RETRYNR sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-MSGTYPE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-WQNAME sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ARFCIPID sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ARFCPID sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ARFCTIME sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ARFCTIDCNT sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-TID sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ORGTID sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-QLUWCNT sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-TZONE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ENTRIES_IN_QUEUE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-PAYLOAD_SIZE sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ERP_IND sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-ALERTED sy-vline 
WA_/SCWM/S_MQ_QUEUE_BASE_STR-APPL_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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