ABAP Select data from SAP table DB2QTHDLST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2QTHDLST 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 DB2QTHDLST. 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 DB2QTHDLST 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_DB2QTHDLST TYPE STANDARD TABLE OF DB2QTHDLST,
      WA_DB2QTHDLST TYPE DB2QTHDLST,
      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: <DB2QTHDLST> TYPE DB2QTHDLST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2QTHDLST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2QTHDLST
  INTO TABLE IT_DB2QTHDLST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2QTHDLST
*  INTO TABLE @DATA(IT_DB2QTHDLST2).
*--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_DB2QTHDLST INDEX 1 INTO DATA(WA_DB2QTHDLST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2QTHDLST ASSIGNING <DB2QTHDLST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2QTHDLST>-MEMBNM = 1.
<DB2QTHDLST>-ACE = 1.
<DB2QTHDLST>-CONNID = 1.
<DB2QTHDLST>-HDSUBSYSID = 1.
<DB2QTHDLST>-HDATDAT = 1.

ENDLOOP.

LOOP AT IT_DB2QTHDLST INTO WA_DB2QTHDLST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2QTHDLST-HDATTIM, sy-vline,
  WA_DB2QTHDLST-HDLRESTIME, sy-vline,
  WA_DB2QTHDLST-JOBNAME, sy-vline,
  WA_DB2QTHDLST-DBPLAN, sy-vline,
  WA_DB2QTHDLST-AUTHID, sy-vline,
  WA_DB2QTHDLST-CORRID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2QTHDLST 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_DB2QTHDLST 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_DB2QTHDLST INTO WA_DB2QTHDLST.


*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_DB2QTHDLST_STR, 
MEMBNM TYPE STRING,
ACE TYPE STRING,
CONNID TYPE STRING,
HDSUBSYSID TYPE STRING,
HDATDAT TYPE STRING,
HDATTIM TYPE STRING,
HDLRESTIME TYPE STRING,
JOBNAME TYPE STRING,
DBPLAN TYPE STRING,
AUTHID TYPE STRING,
CORRID TYPE STRING,
THDTSTAT TYPE STRING,
THDSTAT TYPE STRING,
FILLER TYPE STRING,
SQLCNT TYPE STRING,
DBCOMMIT TYPE STRING,
ABORT TYPE STRING,
GETPAGE TYPE STRING,
UPDPAGE TYPE STRING,
LOCKS TYPE STRING,
QTXANPL TYPE STRING,
CPUTIME TYPE STRING,
ELTIME TYPE STRING,
LOCKMOD TYPE STRING,
ACTTIME TYPE STRING,
TIMEINDB2 TYPE STRING,
PROCINDB2 TYPE STRING,
WPTYPE TYPE STRING,
WPNUMBER TYPE STRING,
WPID TYPE STRING,
ASHOST TYPE STRING,
THDREQ TYPE STRING,
THDEUWN TYPE STRING,
THDEUTX TYPE STRING,
THDACT1 TYPE STRING,
THDACT2 TYPE STRING,
QMDASUFX TYPE STRING,
QMDAPLAT TYPE STRING,
QWHDRQNM TYPE STRING,
QWHCEUID TYPE STRING,
QWHCTOKN TYPE STRING,
QWACPARR TYPE STRING,
QW0148CI TYPE STRING,
QW0148TTK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2QTHDLST_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_DB2QTHDLST_STR-MEMBNM sy-vline 
WA_DB2QTHDLST_STR-ACE sy-vline 
WA_DB2QTHDLST_STR-CONNID sy-vline 
WA_DB2QTHDLST_STR-HDSUBSYSID sy-vline 
WA_DB2QTHDLST_STR-HDATDAT sy-vline 
WA_DB2QTHDLST_STR-HDATTIM sy-vline 
WA_DB2QTHDLST_STR-HDLRESTIME sy-vline 
WA_DB2QTHDLST_STR-JOBNAME sy-vline 
WA_DB2QTHDLST_STR-DBPLAN sy-vline 
WA_DB2QTHDLST_STR-AUTHID sy-vline 
WA_DB2QTHDLST_STR-CORRID sy-vline 
WA_DB2QTHDLST_STR-THDTSTAT sy-vline 
WA_DB2QTHDLST_STR-THDSTAT sy-vline 
WA_DB2QTHDLST_STR-FILLER sy-vline 
WA_DB2QTHDLST_STR-SQLCNT sy-vline 
WA_DB2QTHDLST_STR-DBCOMMIT sy-vline 
WA_DB2QTHDLST_STR-ABORT sy-vline 
WA_DB2QTHDLST_STR-GETPAGE sy-vline 
WA_DB2QTHDLST_STR-UPDPAGE sy-vline 
WA_DB2QTHDLST_STR-LOCKS sy-vline 
WA_DB2QTHDLST_STR-QTXANPL sy-vline 
WA_DB2QTHDLST_STR-CPUTIME sy-vline 
WA_DB2QTHDLST_STR-ELTIME sy-vline 
WA_DB2QTHDLST_STR-LOCKMOD sy-vline 
WA_DB2QTHDLST_STR-ACTTIME sy-vline 
WA_DB2QTHDLST_STR-TIMEINDB2 sy-vline 
WA_DB2QTHDLST_STR-PROCINDB2 sy-vline 
WA_DB2QTHDLST_STR-WPTYPE sy-vline 
WA_DB2QTHDLST_STR-WPNUMBER sy-vline 
WA_DB2QTHDLST_STR-WPID sy-vline 
WA_DB2QTHDLST_STR-ASHOST sy-vline 
WA_DB2QTHDLST_STR-THDREQ sy-vline 
WA_DB2QTHDLST_STR-THDEUWN sy-vline 
WA_DB2QTHDLST_STR-THDEUTX sy-vline 
WA_DB2QTHDLST_STR-THDACT1 sy-vline 
WA_DB2QTHDLST_STR-THDACT2 sy-vline 
WA_DB2QTHDLST_STR-QMDASUFX sy-vline 
WA_DB2QTHDLST_STR-QMDAPLAT sy-vline 
WA_DB2QTHDLST_STR-QWHDRQNM sy-vline 
WA_DB2QTHDLST_STR-QWHCEUID sy-vline 
WA_DB2QTHDLST_STR-QWHCTOKN sy-vline 
WA_DB2QTHDLST_STR-QWACPARR sy-vline 
WA_DB2QTHDLST_STR-QW0148CI sy-vline 
WA_DB2QTHDLST_STR-QW0148TTK sy-vline      INTO ld_text SEPARATED BY SPACE.

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