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<p class="MsoNormal"><span style="color:#1F497D">Agh… And when you check the errlog you see that the its bitching with errors related to row level locking.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> For Ingres 11 the errlog will also show:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_DM93F5_ROW_LOCK_PROTOCOL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_DM925F_DM1B_GETBYBID<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_DM008C_ERROR_REPLACING_RECORD<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_QE007E_ERROR_REPLACING_RECORD<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> For Ingres 10 the errlog will also show:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_DM93F5_ROW_LOCK_PROTOCOL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> E_QE0018_BAD_PARAM_IN_CB<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">This is strange as I had not requested any row level locking. But my test case uses a page_size of 8192 for both the base table and its archive.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I altered the test to use a 2048 page and … the problem went away.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">So in order to keep an archive table for a table with long objects I now will have a 3 step workaround.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Keep on dancin’ Maria.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I think I’ll raise a bug on this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Marty<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Martin Bowes [mailto:martin.bowes@ndph.ox.ac.uk]
<br>
<b>Sent:</b> 26 June 2018 10:59<br>
<b>To:</b> info-ingres@lists.planetingres.org<br>
<b>Subject:</b> [Info-ingres] E_QE0018 before trigger got weird!<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Ingres 10.2/11 etc…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a before triggered rule which I am sure used to work but now is throwing E_QE0018 Illegal parameter in control block.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As a little background:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">The table has a long varchar column.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">We got around the restriction on longs being passed in an AFTER trigger by using the BEFORE trigger.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">We then got around the before triggered procedure not being able to update data by getting it to call a second procedure which achieved the insert into the archive table.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">All of that workaround chain is working fine…seriously!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And the problem is:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">If the final procedure attempts to update a non long column in the original table then we see:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">E_QE0018 Illegal parameter in control block.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Note that the column being updated in the table has been excluded from the action of the rule.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Furthermore, this happens even if the table contains no long objects.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If the final procedure updates another table rather than the original table then the procedure is fine.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If people want to play with this I’ve attached a rudimentary test case.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Do E_QE0018.sh –help and then follow the bouncing ball.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Marty<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PS.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Of course the actual table which has the long data has no element longer than 379 characters.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">The owners are convinced that in the fullness of time someone will put a genuinely long piece of data in there.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">The table has been in existence since 24/12/2015.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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