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  84                   <h2>Using PDSQL to update Clearquest databases</h2>
  85
  86 <p>Often when you add a new field to a Clearquest database you need to tackle the problem of how to update or set the value on all of your old records. Often specialized scripts are created to say set the new field to some known value in all of the older records by using the Clearquest API. This takes time to write such scripts and it takes time to run because all of the action hook code needs to be executed to validate the record, etc. Often this is needless rechecking of already correct values of all of the fields in the record. Updates of this kind can take literally hours to process large numbers of records and have all of that action hook code run for no particular reason.</p>
  87
  88 <p>There is a utility in C:\Program Files\IBM\RationalSDLC\ClearQuest named pdsql. It provides a command line interface to the database directly which you can use to perform updates of fields in a lightning fast manner. The updating of all defect records setting a new field to say "foo" would take literally hours using the Clearquest API but less than a second or two in pdsql.</p>
  89                   <h3>Running PDSQL</h3>
  90
  91 <p>You should have C:\Program Files\IBM\RationalSDLC\ClearQuest in your PATH. When you start up pdsql you need to specify a lot of parameters to connect to the database. Remember you are talking to the database so you must use the true database name, not the Clearquest database name. You can use pdsql -help to see the help usage but usually you'll specify the following parameters:</p>
  92
  93 <div class=code><pre>
  94 $ pdsql -u &lt;username&gt; -p &lt;password&gt; -v ss -s &lt;server&gt; -db &lt;database&gt;
  95 </pre></div>
  96
  97 <p>Note that the username (-u) is the database username. Also the -db is the database name not the Clearquest database name. The -v ss stands for SQLServer and -s is the server name. for ease I have a simply Bash script to get into pdsql that I've named cqsql.sh:</p>
  98
  99 <div class=code><pre>
 100 Ltsdo-adefaria:cat /mcsi/scm_tools/cq/cqsql.sh
 101 #!/bin/bash
 102 if [ $# -ne 1 ]; then
 103   echo "Usage: cqsql <db>"
 104   exit 1
 105 fi
 106
 107 if [ -n "$(type -p rlwrap)" ]; then
 108   rlwrap=rlwrap
 109 fi
 110
 111 $rlwrap pdsql -u &lt;username&gt; -p &lt;password&gt; -v ss -s &lt;server&gt; -db $1
 112 </pre></div>
 113
 114 <p>Once in pdsql you can issue SQL statements. Note that ';' is required to terminate all commands - even quit! Also note there is no command line history and very poor editing. If, for example, you forget and do say an up arrow you have put unprintable characters in your command line and your command will fail. If you use Cygwin and have installed the wonderful utility rlwrap (readline wrap) then you will have a full, bash like command history which is extremely useful!</p>
 115
 116 <h3>Issuing SQL commands</h3>
 117
 118 <p>Remember, you are talking to the back end database directly so all field names will be the database field names shown in Clearquest Designer - not the field names that Clearquest users use. Some useful, non SQL commands are tables; and columns <tablename>;. These commands show the table names in the database and the columns in the a particular table.</p>
 119
 120 <p>Most standard SQL commands work as expected. Here is an example session where I used pdsql to set Reproducible to the string "NO" if it was previously NULL (New short strings are set to NULL when a field is added to a record).</p>
 121
 122 <div class=code><pre>
 123 >select count(*) from defect where reproducible is not null;
 124
 125    <EXPR-1>
 126          11
 127
 128 >select reproducible from defect where reproducible is not null;
 129
 130                            reproducible
 131                                                 NO
 132                                                 NO
 133                                                 NO
 134                                                 NO
 135                                                 NO
 136                                                 NO
 137                                                 NO
 138                                                 NO
 139                                                 NO
 140                                                 NO
 141                                                 NO
 142                                                YES
 143
 144 >update defect set reproducible = 'NO' where reproducible  is null;
 145 93326 rows affected.
 146 >
 147 </pre></div>
 148
 149 <p>I used to the count(*) syntax to determine how many of the defect records had reproducible not set to NULL. These would be from any new records created since the action hook code makes sure to set this field to either "YES" or "NO". It's the old records we need to set to "NO" if they were NULL. Since there were only 11 records that were not null I decided to see what they contained. Good, they contain what I expect - "NO"'s and "YES"'s only. Then the simple update command to set reproducible = 'NO' if it was null. This command took a second or two to update 93326 defects!</p>
 150
 151 <h3>Setting a reference field</h3>
 152
 153 <p>When you look into the database directly you start learning how Clearquest does some of its magic. For a reference field one does not see the key to the reference field in textual form rather one sees an integer field, a dbid. Records have a dbid which allows direct access to the particular record. This way if the textual representation of the key (i.e. Name in the Certification stateless record as shown here) you only need update one record instead of potentially thousands of referenced records.</p>
 154
 155 <p>So then how do you change a reference field? The trick is to find the dbid for that stateless record and plop it into the record that references it. Unfortunately, when the stateless record Certification was created its internal table name was never changed from the default "new1" so we need to use the database name for this table - new1. We select the fields for new1 to reveal that 35541127 is the dbid for the "N/A" record in Certification. We then do a small test changing only one record - DB00031023 - carriercertification reference from 0 -> 35541127. Next I checked that this defect (DB00031023) had a Certification of "N/A" in the Clearquest client. It did. So I know this method works.</p>
 156
 157 <div class=code><pre>
 158 >select * from new1;
 159
 160        dbid   is_active     version lock_version   locked_by ratl_mastership ratl_keysite          name
 161           0        NULL           1            0           0               0            0          NULL
 162    35541119           1           1            0           0        16777313     16777313          Grade A
 163    35541121           1           1            0           0        16777313     16777313          Grade B
 164    35541123           1           1            0           0        16777313     16777313          Grade C
 165    35541125           1           1            0           0        16777313     16777313          Grade D
 166    35541127           1           1            0           0        16777313     16777313          N/A
 167
 168 >select certification from defect where id='DB00031023';
 169
 170 certification
 171                    0
 172
 173 >update defect set certification=35541127 where id='DB00031023';
 174 1 rows affected.
 175
 176 >select id from defect where id='DB00031024' and certification = 0;
 177
 178            id
 179 DB00031024
 180
 181
 182 >select id from defect where id='DB00031024' and certification = 1;
 183
 184            id
 185
 186 >select count(*) from defect;
 187    <EXPR-1>
 188       93407
 189
 190 >select count(*) from defect where certification = 0;
 191    <EXPR-1>
 192       93026
 193
 194 >update defect set certification = 35541127 where certification= 0;
 195 93025 rows affected.
 196 </pre></div>
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 456       <option value="http://defaria.com/blogs/Status/2007/11/">November 2007</option>
 457
 458
 459
 460       <option value="http://defaria.com/blogs/Status/2007/10/">October 2007</option>
 461
 462
 463
 464       <option value="http://defaria.com/blogs/Status/2007/09/">September 2007</option>
 465
 466
 467
 468       <option value="http://defaria.com/blogs/Status/2007/08/">August 2007</option>
 469
 470
 471
 472       <option value="http://defaria.com/blogs/Status/2007/07/">July 2007</option>
 473
 474
 475
 476       <option value="http://defaria.com/blogs/Status/2007/06/">June 2007</option>
 477
 478
 479
 480       <option value="http://defaria.com/blogs/Status/2007/05/">May 2007</option>
 481
 482
 483
 484       <option value="http://defaria.com/blogs/Status/2007/04/">April 2007</option>
 485
 486
 487
 488       <option value="http://defaria.com/blogs/Status/2007/03/">March 2007</option>
 489
 490
 491
 492       <option value="http://defaria.com/blogs/Status/2007/01/">January 2007</option>
 493
 494
 495
 496       <option value="http://defaria.com/blogs/Status/2006/12/">December 2006</option>
 497
 498
 499
 500       <option value="http://defaria.com/blogs/Status/2006/11/">November 2006</option>
 501
 502
 503
 504       <option value="http://defaria.com/blogs/Status/2006/10/">October 2006</option>
 505
 506
 507
 508       <option value="http://defaria.com/blogs/Status/2006/09/">September 2006</option>
 509
 510
 511
 512       <option value="http://defaria.com/blogs/Status/2006/07/">July 2006</option>
 513
 514
 515
 516       <option value="http://defaria.com/blogs/Status/2006/06/">June 2006</option>
 517
 518
 519
 520       <option value="http://defaria.com/blogs/Status/2006/05/">May 2006</option>
 521
 522
 523
 524       <option value="http://defaria.com/blogs/Status/2006/04/">April 2006</option>
 525
 526
 527
 528       <option value="http://defaria.com/blogs/Status/2006/03/">March 2006</option>
 529
 530
 531
 532       <option value="http://defaria.com/blogs/Status/2006/02/">February 2006</option>
 533
 534
 535
 536       <option value="http://defaria.com/blogs/Status/2006/01/">January 2006</option>
 537
 538
 539
 540       <option value="http://defaria.com/blogs/Status/2005/12/">December 2005</option>
 541
 542
 543
 544       <option value="http://defaria.com/blogs/Status/2005/11/">November 2005</option>
 545
 546
 547
 548       <option value="http://defaria.com/blogs/Status/2005/10/">October 2005</option>
 549
 550
 551
 552       <option value="http://defaria.com/blogs/Status/2005/09/">September 2005</option>
 553
 554
 555
 556       <option value="http://defaria.com/blogs/Status/2005/08/">August 2005</option>
 557
 558
 559
 560       <option value="http://defaria.com/blogs/Status/2005/07/">July 2005</option>
 561
 562
 563
 564       <option value="http://defaria.com/blogs/Status/2005/06/">June 2005</option>
 565
 566
 567
 568       <option value="http://defaria.com/blogs/Status/2005/05/">May 2005</option>
 569
 570
 571
 572       <option value="http://defaria.com/blogs/Status/2005/04/">April 2005</option>
 573
 574
 575
 576       <option value="http://defaria.com/blogs/Status/2005/03/">March 2005</option>
 577
 578
 579
 580       <option value="http://defaria.com/blogs/Status/2005/02/">February 2005</option>
 581
 582
 583
 584       <option value="http://defaria.com/blogs/Status/2005/01/">January 2005</option>
 585
 586
 587
 588       <option value="http://defaria.com/blogs/Status/2004/12/">December 2004</option>
 589
 590
 591
 592       <option value="http://defaria.com/blogs/Status/2004/09/">September 2004</option>
 593
 594
 595
 596       <option value="http://defaria.com/blogs/Status/2004/08/">August 2004</option>
 597
 598
 599
 600       <option value="http://defaria.com/blogs/Status/2004/07/">July 2004</option>
 601
 602
 603
 604       <option value="http://defaria.com/blogs/Status/2004/06/">June 2004</option>
 605
 606
 607
 608       <option value="http://defaria.com/blogs/Status/2004/05/">May 2004</option>
 609
 610
 611
 612       <option value="http://defaria.com/blogs/Status/2004/04/">April 2004</option>
 613
 614
 615
 616       <option value="http://defaria.com/blogs/Status/2004/03/">March 2004</option>
 617
 618
 619
 620       <option value="http://defaria.com/blogs/Status/2004/02/">February 2004</option>
 621
 622
 623
 624       <option value="http://defaria.com/blogs/Status/2004/01/">January 2004</option>
 625
 626
 627
 628       <option value="http://defaria.com/blogs/Status/2003/12/">December 2003</option>
 629
 630
 631
 632       <option value="http://defaria.com/blogs/Status/2003/11/">November 2003</option>
 633
 634     </select>
 635   </div>
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