ABAP Select data from SAP table MSSMEMQSEMAPHORES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSSMEMQSEMAPHORES
*  INTO TABLE @DATA(IT_MSSMEMQSEMAPHORES2).
*--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_MSSMEMQSEMAPHORES INDEX 1 INTO DATA(WA_MSSMEMQSEMAPHORES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSSMEMQSEMAPHORES>-SEMNAME = 1.
<MSSMEMQSEMAPHORES>-SEMTYPE = 1.
<MSSMEMQSEMAPHORES>-GRANTTGTKB = 1.
<MSSMEMQSEMAPHORES>-MAXTGTKB = 1.
<MSSMEMQSEMAPHORES>-MEMTOTKB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSSMEMQSEMAPHORES-AVAILMEMKB, sy-vline,
  WA_MSSMEMQSEMAPHORES-GRANTKB, sy-vline,
  WA_MSSMEMQSEMAPHORES-USEDKB, sy-vline,
  WA_MSSMEMQSEMAPHORES-GRANTCNT, sy-vline,
  WA_MSSMEMQSEMAPHORES-WAITERCNT, sy-vline,
  WA_MSSMEMQSEMAPHORES-TIMEOUTERRCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSSMEMQSEMAPHORES 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_MSSMEMQSEMAPHORES 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_MSSMEMQSEMAPHORES INTO WA_MSSMEMQSEMAPHORES.


*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_MSSMEMQSEMAPHORES_STR, 
SEMNAME TYPE STRING,
SEMTYPE TYPE STRING,
GRANTTGTKB TYPE STRING,
MAXTGTKB TYPE STRING,
MEMTOTKB TYPE STRING,
AVAILMEMKB TYPE STRING,
GRANTKB TYPE STRING,
USEDKB TYPE STRING,
GRANTCNT TYPE STRING,
WAITERCNT TYPE STRING,
TIMEOUTERRCNT TYPE STRING,
FORCEDGRNTCNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSSMEMQSEMAPHORES_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_MSSMEMQSEMAPHORES_STR-SEMNAME sy-vline 
WA_MSSMEMQSEMAPHORES_STR-SEMTYPE sy-vline 
WA_MSSMEMQSEMAPHORES_STR-GRANTTGTKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-MAXTGTKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-MEMTOTKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-AVAILMEMKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-GRANTKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-USEDKB sy-vline 
WA_MSSMEMQSEMAPHORES_STR-GRANTCNT sy-vline 
WA_MSSMEMQSEMAPHORES_STR-WAITERCNT sy-vline 
WA_MSSMEMQSEMAPHORES_STR-TIMEOUTERRCNT sy-vline 
WA_MSSMEMQSEMAPHORES_STR-FORCEDGRNTCNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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