>SELECT TO_CHAR(DATE '2012-03-11', 'IYYY-IW') FROM dual;

2012-10

One should think that converting an ISO year-week string back to a date (denoting the first day in this week) should also be easy:

>SELECT TO_DATE('2012-10', 'IYYY-IW') FROM dual;

ORA-01820: format code cannot appear in date input format
01820. 00000 -  "format code cannot appear in date input format"
*Cause:    
*Action:

So, obviously this is not supported yet (speaking of version 11g R2).

Therefore, I decided to write a conversion function myself. Here it is:

CREATE OR REPLACE FUNCTION iso_week_to_date
  (iso_year IN INTEGER, -- full ISO year, e.g., 2012
   iso_week IN INTEGER) -- ISO week
  RETURN DATE
IS
  jan4_of_iso_year DATE;
  first_day_of_iso_year DATE;
  iso_date DATE;
  iso_date_iso_year INTEGER;
BEGIN
  -- Find the first day of iso_year
  -- (= the Monday of the week containing January 4th)
  jan4_of_iso_year := TO_DATE(iso_year || '-01-04', 'YYYY-MM-DD');
  first_day_of_iso_year := TRUNC(jan4_of_iso_year, 'D');
  
  -- Add the ISO week (in days)
  iso_date := first_day_of_iso_year + 7 * (iso_week - 1);
  
  -- Check whether iso_week is a valid ISO week
  -- (= whether the Thursday of the week containing iso_date is contained in the year iso_year)
  iso_date_iso_year := TO_CHAR(iso_date, 'IYYY');
  IF iso_date_iso_year <> iso_year THEN
    RAISE VALUE_ERROR;
  END IF;
  
  RETURN iso_date;
END;

A quick test:

SELECT iso_week_to_date(2012, 10) FROM dual;

2012-03-05 00.00.00

Another one:

SELECT iso_week_to_date(2012, 1234) FROM dual;

ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "JSELKE.ISO_WEEK_TO_DATE", line 23
06502. 00000 -  "PL/SQL: numeric or value error%s"
*Cause:    
*Action:

Perfect.

Have fun!

Edit: For those prefering plain SQL:

SELECT TRUNC(TO_DATE(2012 || '-01-04', 'YYYY-MM-DD'), 'D') + 7 * (10 - 1) FROM dual;

2012-03-05 00.00.00

<xsl:function name="util:strip-tags">
  <xsl:param name="text"/>
  <xsl:choose>
    <xsl:when test="contains($text, '&lt;')">
      <xsl:value-of select="concat(substring-before($text, '&lt;'),
        util:strip-tags(substring-after($text, '&gt;')))"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$text"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:function>

Note: Don’t forget to declare a namespace for this function (called util in the above code).

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Part 8
Part 9
Part 10
Part 11

As always, VMware has not been able to keep up with recent changes in Linux (kernel 2.6.35 and up). This becomes apparent, when trying to run VMware Workstation in the new Fedora 14. Compiling the VMware kernel module fails with errors like the following:

error: implicit declaration of function ‘iommu_unmap_range’
error: ‘struct sock’ has no member named ‘sk_sleep’

Combining the hints from here and here, I arrived at the following solution, which patches VMware’s kernel module:

cd /tmp
tar xvf /usr/lib/vmware/modules/source/vmmon.tar -C /tmp
perl -pi -e 's,_range,,' vmmon-only/linux/iommu.c
sudo tar cvf /usr/lib/vmware/modules/source/vmmon.tar vmmon-only

cd /tmp
tar xvf /usr/lib/vmware/modules/source/vsock.tar -C /tmp
perl -pi -e 's,sk->compat_sk_sleep,compat_sk_sleep(sk),' vsock-only/linux/af_vsock.c
perl -pi -e 's,listener->compat_sk_sleep,compat_sk_sleep(listener),' vsock-only/linux/af_vsock.c
sudo tar cvf /usr/lib/vmware/modules/source/vsock.tar vsock-only

sudo vmware-modconfig --console --install-all

#!/bin/bash
nohup matlab -nodisplay -r "run $1" >$2 2>&1 &

To run the MATLAB script myscript.m in the background and write the output to myscript.log, simply do the following:

matlabbg myscript.m myscript.log

ALTER TABLE tablename ADD COLUMN id INTEGER NOT NULL WITH DEFAULT 0
ALTER TABLE tablename ALTER COLUMN id GENERATED BY DEFAULT AS IDENTITY
REORG TABLE tablename
UPDATE tablename SET id = DEFAULT
ALTER TABLE tablename ALTER COLUMN id SET PRIMARY KEY

EDIT: I tested this code with DB2 9.7, but it should work on earlier versions of DB2.

There is a simple (but strange) solution to this problem: Instead of entering just your username when asked for, enter SERVERNAME\USERNAME. Adding the server name as “remote domain” makes Windows think that you are located within a “trustworthy” enterprise environment. Then, your login credentials are stored persistently, thus surviving reboots. Thanks to Microsoft for this intuitive mechanism.

VALUES SQLERRM(-161)

Result:

1
------------------------------------------------------------------------------------------------------
SQL0161N  The resulting row of the insert or update operation does not conform to the view definition.

Nice.

    WITH a AS (SELECT a.application_handle, a.system_auth_id, a.application_name, a.client_wrkstnname, a.workload_name, a.workload_occurrence_state, b.activity_id, b.uow_id, b.local_start_time, b.activity_state, b.activity_type, b.total_cpu_time, b.rows_read, b.rows_returned, b.query_cost_estimate, b.direct_reads, b.direct_writes
                 FROM TABLE(wlm_get_service_class_workload_occurrences_v97(NULL, NULL, NULL)) a
                      LEFT JOIN TABLE(wlm_get_workload_occurrence_activities_v97(NULL, NULL)) b ON a.application_handle = b.application_handle),
         b AS (SELECT t.*
                 FROM TABLE(mon_get_activity_details(FOR EACH ROW OF (SELECT application_handle, uow_id, activity_id, NULL FROM a WHERE activity_id > 0))) t),
         c AS (SELECT x."activity_id" activity_id, x."uow_id" uow_id, x."stmt_text" stmt_text
                 FROM b,
                      XMLTABLE(XMLNAMESPACES(DEFAULT 'http://www.ibm.com/xmlns/prod/db2/mon'), '$m/db2_activity_details' PASSING XMLPARSE(DOCUMENT b.details) AS "m" COLUMNS
                                                                                                             "activity_id" INTEGER PATH 'activity_id',
                                                                                                             "uow_id" INTEGER PATH 'uow_id',
                                                                                                             "stmt_text" VARCHAR(1024) PATH 'stmt_text') x)
  SELECT a.*, TRANSLATE(c.stmt_text, ' ', CHR(10)) stmt_text
    FROM a
         LEFT JOIN c ON a.activity_id = c.activity_id AND a.uow_id = c.uow_id
   WHERE stmt_text IS NULL OR SUBSTR(stmt_text, 1, 40) <> 'WITH a AS (SELECT a.application_handle, '
ORDER BY application_handle, a.activity_id