ABAP Select data from SAP table DB2LOCKRES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2LOCKRES 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 DB2LOCKRES. 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 DB2LOCKRES 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_DB2LOCKRES TYPE STANDARD TABLE OF DB2LOCKRES,
      WA_DB2LOCKRES TYPE DB2LOCKRES,
      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: <DB2LOCKRES> TYPE DB2LOCKRES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2LOCKRES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2LOCKRES
  INTO TABLE IT_DB2LOCKRES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2LOCKRES
*  INTO TABLE @DATA(IT_DB2LOCKRES2).
*--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_DB2LOCKRES INDEX 1 INTO DATA(WA_DB2LOCKRES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2LOCKRES ASSIGNING <DB2LOCKRES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2LOCKRES>-T3ACE = 1.
<DB2LOCKRES>-T3DBNAME = 1.
<DB2LOCKRES>-T3OBNAME = 1.
<DB2LOCKRES>-T3LOCKS = 1.
<DB2LOCKRES>-T3TYPE = 1.

ENDLOOP.

LOOP AT IT_DB2LOCKRES INTO WA_DB2LOCKRES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2LOCKRES-T3STATE, sy-vline,
  WA_DB2LOCKRES-T3DURAT, sy-vline,
  WA_DB2LOCKRES-T3SUSP, sy-vline,
  WA_DB2LOCKRES-T3FUNCT, sy-vline,
  WA_DB2LOCKRES-T3COLL, sy-vline,
  WA_DB2LOCKRES-T3PACK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2LOCKRES 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_DB2LOCKRES 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_DB2LOCKRES INTO WA_DB2LOCKRES.


*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_DB2LOCKRES_STR, 
T3ACE TYPE STRING,
T3DBNAME TYPE STRING,
T3OBNAME TYPE STRING,
T3LOCKS TYPE STRING,
T3TYPE TYPE STRING,
T3STATE TYPE STRING,
T3DURAT TYPE STRING,
T3SUSP TYPE STRING,
T3FUNCT TYPE STRING,
T3COLL TYPE STRING,
T3PACK TYPE STRING,
T3CONST TYPE STRING,
T3PLLCK TYPE STRING,
T3PART TYPE STRING,
T3SUBP TYPE STRING,
T3ROW TYPE STRING,
T3PAGE TYPE STRING,
T3BPID TYPE STRING,
T3RMID TYPE STRING,
T3HASH TYPE STRING,
DS_MEMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2LOCKRES_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_DB2LOCKRES_STR-T3ACE sy-vline 
WA_DB2LOCKRES_STR-T3DBNAME sy-vline 
WA_DB2LOCKRES_STR-T3OBNAME sy-vline 
WA_DB2LOCKRES_STR-T3LOCKS sy-vline 
WA_DB2LOCKRES_STR-T3TYPE sy-vline 
WA_DB2LOCKRES_STR-T3STATE sy-vline 
WA_DB2LOCKRES_STR-T3DURAT sy-vline 
WA_DB2LOCKRES_STR-T3SUSP sy-vline 
WA_DB2LOCKRES_STR-T3FUNCT sy-vline 
WA_DB2LOCKRES_STR-T3COLL sy-vline 
WA_DB2LOCKRES_STR-T3PACK sy-vline 
WA_DB2LOCKRES_STR-T3CONST sy-vline 
WA_DB2LOCKRES_STR-T3PLLCK sy-vline 
WA_DB2LOCKRES_STR-T3PART sy-vline 
WA_DB2LOCKRES_STR-T3SUBP sy-vline 
WA_DB2LOCKRES_STR-T3ROW sy-vline 
WA_DB2LOCKRES_STR-T3PAGE sy-vline 
WA_DB2LOCKRES_STR-T3BPID sy-vline 
WA_DB2LOCKRES_STR-T3RMID sy-vline 
WA_DB2LOCKRES_STR-T3HASH sy-vline 
WA_DB2LOCKRES_STR-DS_MEMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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