ABAP Select data from SAP table DB2LOCKS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2LOCKS 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 DB2LOCKS. 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 DB2LOCKS 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_DB2LOCKS TYPE STANDARD TABLE OF DB2LOCKS,
      WA_DB2LOCKS TYPE DB2LOCKS,
      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: <DB2LOCKS> TYPE DB2LOCKS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2LOCKS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2LOCKS
  INTO TABLE IT_DB2LOCKS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2LOCKS
*  INTO TABLE @DATA(IT_DB2LOCKS2).
*--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_DB2LOCKS INDEX 1 INTO DATA(WA_DB2LOCKS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2LOCKS ASSIGNING <DB2LOCKS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2LOCKS>-USERID = 1.
<DB2LOCKS>-LOCKID = 1.
<DB2LOCKS>-LOCKMOD_DB = 1.
<DB2LOCKS>-RESTYPE = 1.
<DB2LOCKS>-DBOWNER = 1.

ENDLOOP.

LOOP AT IT_DB2LOCKS INTO WA_DB2LOCKS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2LOCKS-PAGESET, sy-vline,
  WA_DB2LOCKS-DURATION, sy-vline,
  WA_DB2LOCKS-LOCKTYPE, sy-vline,
  WA_DB2LOCKS-LOCKATRI, sy-vline,
  WA_DB2LOCKS-HOLD_WAIT, sy-vline,
  WA_DB2LOCKS-HDSUBSYSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2LOCKS 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_DB2LOCKS 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_DB2LOCKS INTO WA_DB2LOCKS.


*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_DB2LOCKS_STR, 
USERID TYPE STRING,
LOCKID TYPE STRING,
LOCKMOD_DB TYPE STRING,
RESTYPE TYPE STRING,
DBOWNER TYPE STRING,
PAGESET TYPE STRING,
DURATION TYPE STRING,
LOCKTYPE TYPE STRING,
LOCKATRI TYPE STRING,
HOLD_WAIT TYPE STRING,
HDSUBSYSID TYPE STRING,
HDATDAT TYPE STRING,
HDATTIM TYPE STRING,
HDLRESTIME TYPE STRING,
ACE TYPE STRING,
JOBNAME TYPE STRING,
DBPLAN TYPE STRING,
AUTHID TYPE STRING,
CORRID TYPE STRING,
CONNID 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,
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,
ADTHRSTA TYPE STRING,
PRCINDB2 TYPE STRING,
SSPINDB2 TYPE STRING,
DS_MEMBER TYPE STRING,
THDMLOCKS TYPE STRING,
CONNNAME TYPE STRING,
QMDAPLAT TYPE STRING,
QWHDRQNM TYPE STRING,
SAPSID TYPE STRING,
SAPSYS TYPE STRING,
ABAPREP TYPE STRING,
TXCODE TYPE STRING,
ENDUSER TYPE STRING,
J2EESERV TYPE STRING,
QWACPARR TYPE STRING,
QW0148CI TYPE STRING,
QW0148ST TYPE STRING,
QW0148TTK TYPE STRING,
NQW1503H TYPE STRING,
NQW1503W TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2LOCKS_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_DB2LOCKS_STR-USERID sy-vline 
WA_DB2LOCKS_STR-LOCKID sy-vline 
WA_DB2LOCKS_STR-LOCKMOD_DB sy-vline 
WA_DB2LOCKS_STR-RESTYPE sy-vline 
WA_DB2LOCKS_STR-DBOWNER sy-vline 
WA_DB2LOCKS_STR-PAGESET sy-vline 
WA_DB2LOCKS_STR-DURATION sy-vline 
WA_DB2LOCKS_STR-LOCKTYPE sy-vline 
WA_DB2LOCKS_STR-LOCKATRI sy-vline 
WA_DB2LOCKS_STR-HOLD_WAIT sy-vline 
WA_DB2LOCKS_STR-HDSUBSYSID sy-vline 
WA_DB2LOCKS_STR-HDATDAT sy-vline 
WA_DB2LOCKS_STR-HDATTIM sy-vline 
WA_DB2LOCKS_STR-HDLRESTIME sy-vline 
WA_DB2LOCKS_STR-ACE sy-vline 
WA_DB2LOCKS_STR-JOBNAME sy-vline 
WA_DB2LOCKS_STR-DBPLAN sy-vline 
WA_DB2LOCKS_STR-AUTHID sy-vline 
WA_DB2LOCKS_STR-CORRID sy-vline 
WA_DB2LOCKS_STR-CONNID sy-vline 
WA_DB2LOCKS_STR-THDSTAT sy-vline 
WA_DB2LOCKS_STR-FILLER sy-vline 
WA_DB2LOCKS_STR-SQLCNT sy-vline 
WA_DB2LOCKS_STR-DBCOMMIT sy-vline 
WA_DB2LOCKS_STR-ABORT sy-vline 
WA_DB2LOCKS_STR-GETPAGE sy-vline 
WA_DB2LOCKS_STR-UPDPAGE sy-vline 
WA_DB2LOCKS_STR-LOCKS sy-vline 
WA_DB2LOCKS_STR-CPUTIME sy-vline 
WA_DB2LOCKS_STR-ELTIME sy-vline 
WA_DB2LOCKS_STR-LOCKMOD sy-vline 
WA_DB2LOCKS_STR-ACTTIME sy-vline 
WA_DB2LOCKS_STR-TIMEINDB2 sy-vline 
WA_DB2LOCKS_STR-PROCINDB2 sy-vline 
WA_DB2LOCKS_STR-WPTYPE sy-vline 
WA_DB2LOCKS_STR-WPNUMBER sy-vline 
WA_DB2LOCKS_STR-WPID sy-vline 
WA_DB2LOCKS_STR-ASHOST sy-vline 
WA_DB2LOCKS_STR-THDREQ sy-vline 
WA_DB2LOCKS_STR-ADTHRSTA sy-vline 
WA_DB2LOCKS_STR-PRCINDB2 sy-vline 
WA_DB2LOCKS_STR-SSPINDB2 sy-vline 
WA_DB2LOCKS_STR-DS_MEMBER sy-vline 
WA_DB2LOCKS_STR-THDMLOCKS sy-vline 
WA_DB2LOCKS_STR-CONNNAME sy-vline 
WA_DB2LOCKS_STR-QMDAPLAT sy-vline 
WA_DB2LOCKS_STR-QWHDRQNM sy-vline 
WA_DB2LOCKS_STR-SAPSID sy-vline 
WA_DB2LOCKS_STR-SAPSYS sy-vline 
WA_DB2LOCKS_STR-ABAPREP sy-vline 
WA_DB2LOCKS_STR-TXCODE sy-vline 
WA_DB2LOCKS_STR-ENDUSER sy-vline 
WA_DB2LOCKS_STR-J2EESERV sy-vline 
WA_DB2LOCKS_STR-QWACPARR sy-vline 
WA_DB2LOCKS_STR-QW0148CI sy-vline 
WA_DB2LOCKS_STR-QW0148ST sy-vline 
WA_DB2LOCKS_STR-QW0148TTK sy-vline 
WA_DB2LOCKS_STR-NQW1503H sy-vline 
WA_DB2LOCKS_STR-NQW1503W sy-vline      INTO ld_text SEPARATED BY SPACE.

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