ABAP Select data from SAP table DB2SWPARM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2SWPARM 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 DB2SWPARM. 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 DB2SWPARM 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_DB2SWPARM TYPE STANDARD TABLE OF DB2SWPARM,
      WA_DB2SWPARM TYPE DB2SWPARM,
      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: <DB2SWPARM> TYPE DB2SWPARM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2SWPARM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2SWPARM
  INTO TABLE IT_DB2SWPARM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2SWPARM
*  INTO TABLE @DATA(IT_DB2SWPARM2).
*--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_DB2SWPARM INDEX 1 INTO DATA(WA_DB2SWPARM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2SWPARM ASSIGNING <DB2SWPARM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2SWPARM>-HDSUBSYSID = 1.
<DB2SWPARM>-HDATDAT = 1.
<DB2SWPARM>-HDATTIM = 1.
<DB2SWPARM>-HDSINCEDAT = 1.
<DB2SWPARM>-HDSINCETIM = 1.

ENDLOOP.

LOOP AT IT_DB2SWPARM INTO WA_DB2SWPARM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2SWPARM-HDLRESTIME, sy-vline,
  WA_DB2SWPARM-BPACTPGNM, sy-vline,
  WA_DB2SWPARM-BPACTPG, sy-vline,
  WA_DB2SWPARM-BPHITRATNM, sy-vline,
  WA_DB2SWPARM-BPHITRAT, sy-vline,
  WA_DB2SWPARM-BPSHORTNM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2SWPARM 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_DB2SWPARM 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_DB2SWPARM INTO WA_DB2SWPARM.


*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_DB2SWPARM_STR, 
HDSUBSYSID TYPE STRING,
HDATDAT TYPE STRING,
HDATTIM TYPE STRING,
HDSINCEDAT TYPE STRING,
HDSINCETIM TYPE STRING,
HDLRESTIME TYPE STRING,
BPACTPGNM TYPE STRING,
BPACTPG TYPE STRING,
BPHITRATNM TYPE STRING,
BPHITRAT TYPE STRING,
BPSHORTNM TYPE STRING,
BPSHORT TYPE STRING,
BPHPCONCNM TYPE STRING,
BPHPCONC TYPE STRING,
LKDEADLOCK TYPE STRING,
LKTIMEOUT TYPE STRING,
LKSUSPENS TYPE STRING,
LGLOGREAD TYPE STRING,
LGLOGWWAIT TYPE STRING,
LGLOGWRAT TYPE STRING,
EPFULL TYPE STRING,
EPPGINUSE TYPE STRING,
OCDEFCLOSE TYPE STRING,
OCCUROPEDS TYPE STRING,
SSCOMMIT TYPE STRING,
SSROLLBACK TYPE STRING,
SSCHECKPNT TYPE STRING,
SATOTALDML TYPE STRING,
SATOTALDCL TYPE STRING,
SATOTALDDL TYPE STRING,
MCPARALRED TYPE STRING,
MCRIDLIST TYPE STRING,
MCALTERCMD TYPE STRING,
MCSTARTTRC TYPE STRING,
BPNAME TYPE STRING,
LGBUFWRACT TYPE STRING,
EPCTREQ TYPE STRING,
EPPTREQ TYPE STRING,
EPDBDREQ TYPE STRING,
OCDSINUSE TYPE STRING,
MAXKEEPEX TYPE STRING,
GCONTRATE TYPE STRING,
FCONTRATE TYPE STRING,
TLOPTRATE TYPE STRING,
LGLOGSER TYPE STRING,
LGARLOGWR TYPE STRING,
LGLOGLCR TYPE STRING,
GBPREADMIS TYPE STRING,
GBPWRITHIT TYPE STRING,
GBPSTOFAIL TYPE STRING,
LOCKESCAL TYPE STRING,
PAGEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2SWPARM_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_DB2SWPARM_STR-HDSUBSYSID sy-vline 
WA_DB2SWPARM_STR-HDATDAT sy-vline 
WA_DB2SWPARM_STR-HDATTIM sy-vline 
WA_DB2SWPARM_STR-HDSINCEDAT sy-vline 
WA_DB2SWPARM_STR-HDSINCETIM sy-vline 
WA_DB2SWPARM_STR-HDLRESTIME sy-vline 
WA_DB2SWPARM_STR-BPACTPGNM sy-vline 
WA_DB2SWPARM_STR-BPACTPG sy-vline 
WA_DB2SWPARM_STR-BPHITRATNM sy-vline 
WA_DB2SWPARM_STR-BPHITRAT sy-vline 
WA_DB2SWPARM_STR-BPSHORTNM sy-vline 
WA_DB2SWPARM_STR-BPSHORT sy-vline 
WA_DB2SWPARM_STR-BPHPCONCNM sy-vline 
WA_DB2SWPARM_STR-BPHPCONC sy-vline 
WA_DB2SWPARM_STR-LKDEADLOCK sy-vline 
WA_DB2SWPARM_STR-LKTIMEOUT sy-vline 
WA_DB2SWPARM_STR-LKSUSPENS sy-vline 
WA_DB2SWPARM_STR-LGLOGREAD sy-vline 
WA_DB2SWPARM_STR-LGLOGWWAIT sy-vline 
WA_DB2SWPARM_STR-LGLOGWRAT sy-vline 
WA_DB2SWPARM_STR-EPFULL sy-vline 
WA_DB2SWPARM_STR-EPPGINUSE sy-vline 
WA_DB2SWPARM_STR-OCDEFCLOSE sy-vline 
WA_DB2SWPARM_STR-OCCUROPEDS sy-vline 
WA_DB2SWPARM_STR-SSCOMMIT sy-vline 
WA_DB2SWPARM_STR-SSROLLBACK sy-vline 
WA_DB2SWPARM_STR-SSCHECKPNT sy-vline 
WA_DB2SWPARM_STR-SATOTALDML sy-vline 
WA_DB2SWPARM_STR-SATOTALDCL sy-vline 
WA_DB2SWPARM_STR-SATOTALDDL sy-vline 
WA_DB2SWPARM_STR-MCPARALRED sy-vline 
WA_DB2SWPARM_STR-MCRIDLIST sy-vline 
WA_DB2SWPARM_STR-MCALTERCMD sy-vline 
WA_DB2SWPARM_STR-MCSTARTTRC sy-vline 
WA_DB2SWPARM_STR-BPNAME sy-vline 
WA_DB2SWPARM_STR-LGBUFWRACT sy-vline 
WA_DB2SWPARM_STR-EPCTREQ sy-vline 
WA_DB2SWPARM_STR-EPPTREQ sy-vline 
WA_DB2SWPARM_STR-EPDBDREQ sy-vline 
WA_DB2SWPARM_STR-OCDSINUSE sy-vline 
WA_DB2SWPARM_STR-MAXKEEPEX sy-vline 
WA_DB2SWPARM_STR-GCONTRATE sy-vline 
WA_DB2SWPARM_STR-FCONTRATE sy-vline 
WA_DB2SWPARM_STR-TLOPTRATE sy-vline 
WA_DB2SWPARM_STR-LGLOGSER sy-vline 
WA_DB2SWPARM_STR-LGARLOGWR sy-vline 
WA_DB2SWPARM_STR-LGLOGLCR sy-vline 
WA_DB2SWPARM_STR-GBPREADMIS sy-vline 
WA_DB2SWPARM_STR-GBPWRITHIT sy-vline 
WA_DB2SWPARM_STR-GBPSTOFAIL sy-vline 
WA_DB2SWPARM_STR-LOCKESCAL sy-vline 
WA_DB2SWPARM_STR-PAGEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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