ABAP Select data from SAP table DB2LONGRUN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2LONGRUN 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 DB2LONGRUN. 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 DB2LONGRUN 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_DB2LONGRUN TYPE STANDARD TABLE OF DB2LONGRUN,
      WA_DB2LONGRUN TYPE DB2LONGRUN,
      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: <DB2LONGRUN> TYPE DB2LONGRUN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2LONGRUN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2LONGRUN
  INTO TABLE IT_DB2LONGRUN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2LONGRUN
*  INTO TABLE @DATA(IT_DB2LONGRUN2).
*--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_DB2LONGRUN INDEX 1 INTO DATA(WA_DB2LONGRUN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2LONGRUN ASSIGNING <DB2LONGRUN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2LONGRUN>-LRURDATE = 1.
<DB2LONGRUN>-LRURTIME = 1.
<DB2LONGRUN>-LRURSSID = 1.
<DB2LONGRUN>-LRURMEMN = 1.
<DB2LONGRUN>-LRURMG = 1.

ENDLOOP.

LOOP AT IT_DB2LONGRUN INTO WA_DB2LONGRUN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2LONGRUN-QW0313TH, sy-vline,
  WA_DB2LONGRUN-LRURCK, sy-vline,
  WA_DB2LONGRUN-QW0313LW, sy-vline,
  WA_DB2LONGRUN-LRURCN, sy-vline,
  WA_DB2LONGRUN-LRURID, sy-vline,
  WA_DB2LONGRUN-LRURTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2LONGRUN 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_DB2LONGRUN 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_DB2LONGRUN INTO WA_DB2LONGRUN.


*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_DB2LONGRUN_STR, 
LRURDATE TYPE STRING,
LRURTIME TYPE STRING,
LRURSSID TYPE STRING,
LRURMEMN TYPE STRING,
LRURMG TYPE STRING,
QW0313TH TYPE STRING,
LRURCK TYPE STRING,
QW0313LW TYPE STRING,
LRURCN TYPE STRING,
LRURID TYPE STRING,
LRURTY TYPE STRING,
LRURPN TYPE STRING,
LRURAI TYPE STRING,
WPTYPE TYPE STRING,
WPNUMBER TYPE STRING,
WPID TYPE STRING,
ASHOST TYPE STRING,
CONNNAME TYPE STRING,
SAPSID TYPE STRING,
ABAPREP TYPE STRING,
TXCODE TYPE STRING,
ENDUSER TYPE STRING,
J2EESERV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2LONGRUN_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_DB2LONGRUN_STR-LRURDATE sy-vline 
WA_DB2LONGRUN_STR-LRURTIME sy-vline 
WA_DB2LONGRUN_STR-LRURSSID sy-vline 
WA_DB2LONGRUN_STR-LRURMEMN sy-vline 
WA_DB2LONGRUN_STR-LRURMG sy-vline 
WA_DB2LONGRUN_STR-QW0313TH sy-vline 
WA_DB2LONGRUN_STR-LRURCK sy-vline 
WA_DB2LONGRUN_STR-QW0313LW sy-vline 
WA_DB2LONGRUN_STR-LRURCN sy-vline 
WA_DB2LONGRUN_STR-LRURID sy-vline 
WA_DB2LONGRUN_STR-LRURTY sy-vline 
WA_DB2LONGRUN_STR-LRURPN sy-vline 
WA_DB2LONGRUN_STR-LRURAI sy-vline 
WA_DB2LONGRUN_STR-WPTYPE sy-vline 
WA_DB2LONGRUN_STR-WPNUMBER sy-vline 
WA_DB2LONGRUN_STR-WPID sy-vline 
WA_DB2LONGRUN_STR-ASHOST sy-vline 
WA_DB2LONGRUN_STR-CONNNAME sy-vline 
WA_DB2LONGRUN_STR-SAPSID sy-vline 
WA_DB2LONGRUN_STR-ABAPREP sy-vline 
WA_DB2LONGRUN_STR-TXCODE sy-vline 
WA_DB2LONGRUN_STR-ENDUSER sy-vline 
WA_DB2LONGRUN_STR-J2EESERV sy-vline      INTO ld_text SEPARATED BY SPACE.

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