ABAP Select data from SAP table DB2LOCKESCAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2LOCKESCAL 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 DB2LOCKESCAL. 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 DB2LOCKESCAL 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_DB2LOCKESCAL TYPE STANDARD TABLE OF DB2LOCKESCAL,
      WA_DB2LOCKESCAL TYPE DB2LOCKESCAL,
      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: <DB2LOCKESCAL> TYPE DB2LOCKESCAL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2LOCKESCAL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2LOCKESCAL
  INTO TABLE IT_DB2LOCKESCAL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2LOCKESCAL
*  INTO TABLE @DATA(IT_DB2LOCKESCAL2).
*--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_DB2LOCKESCAL INDEX 1 INTO DATA(WA_DB2LOCKESCAL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2LOCKESCAL ASSIGNING <DB2LOCKESCAL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2LOCKESCAL>-LOCKMEMN = 1.
<DB2LOCKESCAL>-SSID = 1.
<DB2LOCKESCAL>-LOCKDATE = 1.
<DB2LOCKESCAL>-LOCKTIME = 1.
<DB2LOCKESCAL>-LOCKMSEC = 1.

ENDLOOP.

LOOP AT IT_DB2LOCKESCAL INTO WA_DB2LOCKESCAL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2LOCKESCAL-DBNAME, sy-vline,
  WA_DB2LOCKESCAL-TSNAME, sy-vline,
  WA_DB2LOCKESCAL-QWO337LS, sy-vline,
  WA_DB2LOCKESCAL-QW0337LL, sy-vline,
  WA_DB2LOCKESCAL-QW0337LH, sy-vline,
  WA_DB2LOCKESCAL-QW0337SN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2LOCKESCAL 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_DB2LOCKESCAL 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_DB2LOCKESCAL INTO WA_DB2LOCKESCAL.


*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_DB2LOCKESCAL_STR, 
LOCKMEMN TYPE STRING,
SSID TYPE STRING,
LOCKDATE TYPE STRING,
LOCKTIME TYPE STRING,
LOCKMSEC TYPE STRING,
DBNAME TYPE STRING,
TSNAME TYPE STRING,
QWO337LS TYPE STRING,
QW0337LL TYPE STRING,
QW0337LH TYPE STRING,
QW0337SN TYPE STRING,
QW0337ST TYPE STRING,
QW0337CI TYPE STRING,
QW0337PK TYPE STRING,
THDEUWN TYPE STRING,
THDEUTX TYPE STRING,
QMDASUFX TYPE STRING,
QMDAPLAT TYPE STRING,
QWHDRQNM TYPE STRING,
QWHCEUID TYPE STRING,
CORRID TYPE STRING,
CONNID TYPE STRING,
LOCKDSGN TYPE STRING,
QW0337TY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2LOCKESCAL_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_DB2LOCKESCAL_STR-LOCKMEMN sy-vline 
WA_DB2LOCKESCAL_STR-SSID sy-vline 
WA_DB2LOCKESCAL_STR-LOCKDATE sy-vline 
WA_DB2LOCKESCAL_STR-LOCKTIME sy-vline 
WA_DB2LOCKESCAL_STR-LOCKMSEC sy-vline 
WA_DB2LOCKESCAL_STR-DBNAME sy-vline 
WA_DB2LOCKESCAL_STR-TSNAME sy-vline 
WA_DB2LOCKESCAL_STR-QWO337LS sy-vline 
WA_DB2LOCKESCAL_STR-QW0337LL sy-vline 
WA_DB2LOCKESCAL_STR-QW0337LH sy-vline 
WA_DB2LOCKESCAL_STR-QW0337SN sy-vline 
WA_DB2LOCKESCAL_STR-QW0337ST sy-vline 
WA_DB2LOCKESCAL_STR-QW0337CI sy-vline 
WA_DB2LOCKESCAL_STR-QW0337PK sy-vline 
WA_DB2LOCKESCAL_STR-THDEUWN sy-vline 
WA_DB2LOCKESCAL_STR-THDEUTX sy-vline 
WA_DB2LOCKESCAL_STR-QMDASUFX sy-vline 
WA_DB2LOCKESCAL_STR-QMDAPLAT sy-vline 
WA_DB2LOCKESCAL_STR-QWHDRQNM sy-vline 
WA_DB2LOCKESCAL_STR-QWHCEUID sy-vline 
WA_DB2LOCKESCAL_STR-CORRID sy-vline 
WA_DB2LOCKESCAL_STR-CONNID sy-vline 
WA_DB2LOCKESCAL_STR-LOCKDSGN sy-vline 
WA_DB2LOCKESCAL_STR-QW0337TY sy-vline      INTO ld_text SEPARATED BY SPACE.

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