ABAP Select data from SAP table MSSST04LST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP MSSST04LST 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 MSSST04LST. 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 MSSST04LST 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_MSSST04LST TYPE STANDARD TABLE OF MSSST04LST,
      WA_MSSST04LST TYPE MSSST04LST,
      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: <MSSST04LST> TYPE MSSST04LST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MSSST04LST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MSSST04LST
  INTO TABLE IT_MSSST04LST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSSST04LST
*  INTO TABLE @DATA(IT_MSSST04LST2).
*--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_MSSST04LST INDEX 1 INTO DATA(WA_MSSST04LST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MSSST04LST ASSIGNING <MSSST04LST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSSST04LST>-HOSTNAME = 1.
<MSSST04LST>-SQLVERSION = 1.
<MSSST04LST>-SQLBUILDNM = 1.
<MSSST04LST>-PRODLEVEL = 1.
<MSSST04LST>-SQLSTARTTM = 1.

ENDLOOP.

LOOP AT IT_MSSST04LST INTO WA_MSSST04LST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSSST04LST-SQLEE, sy-vline,
  WA_MSSST04LST-NTVER, sy-vline,
  WA_MSSST04LST-PARAMDIFF, sy-vline,
  WA_MSSST04LST-DISKPERF, sy-vline,
  WA_MSSST04LST-ISCLUSTER, sy-vline,
  WA_MSSST04LST-IS3GB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSSST04LST 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_MSSST04LST 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_MSSST04LST INTO WA_MSSST04LST.


*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_MSSST04LST_STR, 
HOSTNAME TYPE STRING,
SQLVERSION TYPE STRING,
SQLBUILDNM TYPE STRING,
PRODLEVEL TYPE STRING,
SQLSTARTTM TYPE STRING,
SQLEE TYPE STRING,
NTVER TYPE STRING,
PARAMDIFF TYPE STRING,
DISKPERF TYPE STRING,
ISCLUSTER TYPE STRING,
IS3GB TYPE STRING,
ISPAE TYPE STRING,
ISAWE TYPE STRING,
CHIP TYPE STRING,
WINVER TYPE STRING,
NUMCPUS TYPE STRING,
SQLCPUS TYPE STRING,
MASK TYPE STRING,
PHYMEM TYPE STRING,
TRACEFLAGS TYPE STRING,
MEMSETTING TYPE STRING,
AGTLOGLOC TYPE STRING,
ERRLOGLOC TYPE STRING,
CONNECTMEM TYPE STRING,
WRKPROCMEM TYPE STRING,
LOCKMEMORY TYPE STRING,
MAXWSPMEM TYPE STRING,
OPTQRYMEM TYPE STRING,
SQLCACMEM TYPE STRING,
TARSRVMEM TYPE STRING,
TTLSRVMEM TYPE STRING,
USERCONCTS TYPE STRING,
CACHEHIT TYPE STRING,
DATACACHSZ TYPE STRING,
CACHESIZE TYPE STRING,
BUFFCOMMIT TYPE STRING,
FREEBUFFER TYPE STRING,
STLPAGECNT TYPE STRING,
FULLSCANS TYPE STRING,
INDEXSRCH TYPE STRING,
EXTALLOCS TYPE STRING,
EXTDEALLS TYPE STRING,
PAGEALLOCS TYPE STRING,
PAGEDEALLS TYPE STRING,
PAGESPLITS TYPE STRING,
PROBESCANS TYPE STRING,
RANGESCANS TYPE STRING,
WORKFILES TYPE STRING,
WORKTABLES TYPE STRING,
LAZYWRITES TYPE STRING,
PAGEREADS TYPE STRING,
PAGEWRITES TYPE STRING,
REQBUFFPG TYPE STRING,
READAHEAD TYPE STRING,
AUTOPARAM TYPE STRING,
SQLBATCHS TYPE STRING,
SQLCOMPILE TYPE STRING,
AVGLTCHWT TYPE STRING,
LATCHWAITS TYPE STRING,
DB_SIZE TYPE STRING,
DB_ALLOC TYPE STRING,
LOG_SIZE TYPE STRING,
LOG_ALLOC TYPE STRING,
RESERVED TYPE STRING,
NUMTABS TYPE STRING,
TABDATA TYPE STRING,
NUMINDS TYPE STRING,
INDDATA TYPE STRING,
UNUSED TYPE STRING,
NUMPROCS TYPE STRING,
SQLUPTIME TYPE STRING,
CPUBUSY TYPE STRING,
CPUIDLE TYPE STRING,
IOBUSY TYPE STRING,
PCTCPU TYPE STRING,
PCTIDLE TYPE STRING,
PCTIO TYPE STRING,
PACKRECD TYPE STRING,
PACKSENT TYPE STRING,
CONNECTS TYPE STRING,
PACKERRORS TYPE STRING,
TOTALREAD TYPE STRING,
TOTALWRITE TYPE STRING,
TOTALERROR TYPE STRING,
CACHETYPE TYPE STRING,
HITRATIO TYPE STRING,
OBJECTCNT TYPE STRING,
OBJPAGES TYPE STRING,
USECOUNTS TYPE STRING,
R3USERS TYPE STRING,
OTHERUSER TYPE STRING,
UNIUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSSST04LST_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_MSSST04LST_STR-HOSTNAME sy-vline 
WA_MSSST04LST_STR-SQLVERSION sy-vline 
WA_MSSST04LST_STR-SQLBUILDNM sy-vline 
WA_MSSST04LST_STR-PRODLEVEL sy-vline 
WA_MSSST04LST_STR-SQLSTARTTM sy-vline 
WA_MSSST04LST_STR-SQLEE sy-vline 
WA_MSSST04LST_STR-NTVER sy-vline 
WA_MSSST04LST_STR-PARAMDIFF sy-vline 
WA_MSSST04LST_STR-DISKPERF sy-vline 
WA_MSSST04LST_STR-ISCLUSTER sy-vline 
WA_MSSST04LST_STR-IS3GB sy-vline 
WA_MSSST04LST_STR-ISPAE sy-vline 
WA_MSSST04LST_STR-ISAWE sy-vline 
WA_MSSST04LST_STR-CHIP sy-vline 
WA_MSSST04LST_STR-WINVER sy-vline 
WA_MSSST04LST_STR-NUMCPUS sy-vline 
WA_MSSST04LST_STR-SQLCPUS sy-vline 
WA_MSSST04LST_STR-MASK sy-vline 
WA_MSSST04LST_STR-PHYMEM sy-vline 
WA_MSSST04LST_STR-TRACEFLAGS sy-vline 
WA_MSSST04LST_STR-MEMSETTING sy-vline 
WA_MSSST04LST_STR-AGTLOGLOC sy-vline 
WA_MSSST04LST_STR-ERRLOGLOC sy-vline 
WA_MSSST04LST_STR-CONNECTMEM sy-vline 
WA_MSSST04LST_STR-WRKPROCMEM sy-vline 
WA_MSSST04LST_STR-LOCKMEMORY sy-vline 
WA_MSSST04LST_STR-MAXWSPMEM sy-vline 
WA_MSSST04LST_STR-OPTQRYMEM sy-vline 
WA_MSSST04LST_STR-SQLCACMEM sy-vline 
WA_MSSST04LST_STR-TARSRVMEM sy-vline 
WA_MSSST04LST_STR-TTLSRVMEM sy-vline 
WA_MSSST04LST_STR-USERCONCTS sy-vline 
WA_MSSST04LST_STR-CACHEHIT sy-vline 
WA_MSSST04LST_STR-DATACACHSZ sy-vline 
WA_MSSST04LST_STR-CACHESIZE sy-vline 
WA_MSSST04LST_STR-BUFFCOMMIT sy-vline 
WA_MSSST04LST_STR-FREEBUFFER sy-vline 
WA_MSSST04LST_STR-STLPAGECNT sy-vline 
WA_MSSST04LST_STR-FULLSCANS sy-vline 
WA_MSSST04LST_STR-INDEXSRCH sy-vline 
WA_MSSST04LST_STR-EXTALLOCS sy-vline 
WA_MSSST04LST_STR-EXTDEALLS sy-vline 
WA_MSSST04LST_STR-PAGEALLOCS sy-vline 
WA_MSSST04LST_STR-PAGEDEALLS sy-vline 
WA_MSSST04LST_STR-PAGESPLITS sy-vline 
WA_MSSST04LST_STR-PROBESCANS sy-vline 
WA_MSSST04LST_STR-RANGESCANS sy-vline 
WA_MSSST04LST_STR-WORKFILES sy-vline 
WA_MSSST04LST_STR-WORKTABLES sy-vline 
WA_MSSST04LST_STR-LAZYWRITES sy-vline 
WA_MSSST04LST_STR-PAGEREADS sy-vline 
WA_MSSST04LST_STR-PAGEWRITES sy-vline 
WA_MSSST04LST_STR-REQBUFFPG sy-vline 
WA_MSSST04LST_STR-READAHEAD sy-vline 
WA_MSSST04LST_STR-AUTOPARAM sy-vline 
WA_MSSST04LST_STR-SQLBATCHS sy-vline 
WA_MSSST04LST_STR-SQLCOMPILE sy-vline 
WA_MSSST04LST_STR-AVGLTCHWT sy-vline 
WA_MSSST04LST_STR-LATCHWAITS sy-vline 
WA_MSSST04LST_STR-DB_SIZE sy-vline 
WA_MSSST04LST_STR-DB_ALLOC sy-vline 
WA_MSSST04LST_STR-LOG_SIZE sy-vline 
WA_MSSST04LST_STR-LOG_ALLOC sy-vline 
WA_MSSST04LST_STR-RESERVED sy-vline 
WA_MSSST04LST_STR-NUMTABS sy-vline 
WA_MSSST04LST_STR-TABDATA sy-vline 
WA_MSSST04LST_STR-NUMINDS sy-vline 
WA_MSSST04LST_STR-INDDATA sy-vline 
WA_MSSST04LST_STR-UNUSED sy-vline 
WA_MSSST04LST_STR-NUMPROCS sy-vline 
WA_MSSST04LST_STR-SQLUPTIME sy-vline 
WA_MSSST04LST_STR-CPUBUSY sy-vline 
WA_MSSST04LST_STR-CPUIDLE sy-vline 
WA_MSSST04LST_STR-IOBUSY sy-vline 
WA_MSSST04LST_STR-PCTCPU sy-vline 
WA_MSSST04LST_STR-PCTIDLE sy-vline 
WA_MSSST04LST_STR-PCTIO sy-vline 
WA_MSSST04LST_STR-PACKRECD sy-vline 
WA_MSSST04LST_STR-PACKSENT sy-vline 
WA_MSSST04LST_STR-CONNECTS sy-vline 
WA_MSSST04LST_STR-PACKERRORS sy-vline 
WA_MSSST04LST_STR-TOTALREAD sy-vline 
WA_MSSST04LST_STR-TOTALWRITE sy-vline 
WA_MSSST04LST_STR-TOTALERROR sy-vline 
WA_MSSST04LST_STR-CACHETYPE sy-vline 
WA_MSSST04LST_STR-HITRATIO sy-vline 
WA_MSSST04LST_STR-OBJECTCNT sy-vline 
WA_MSSST04LST_STR-OBJPAGES sy-vline 
WA_MSSST04LST_STR-USECOUNTS sy-vline 
WA_MSSST04LST_STR-R3USERS sy-vline 
WA_MSSST04LST_STR-OTHERUSER sy-vline 
WA_MSSST04LST_STR-UNIUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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