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<p class="MsoNormal"><span style="color:#1F497D">I’ve now shown the database procedure part was a furphy. A simple insert has the same effect.<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">It has also been pointed out the descent into insanity was a very short trip.<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>
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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> 12 October 2017 14:35<br>
<b>To:</b> info-ingres@lists.planetingres.org<br>
<b>Subject:</b> [Info-ingres] database procedures, string concatenation. long varchars and my slow descent into insanity<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">II 10.2.0 (a64.lnx/100) +p15162<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here’s some fun…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">create table a_long(txt long varchar not null not default);<o:p></o:p></p>
<p class="MsoNormal">create table another_long(txt long varchar not null not default);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Insert a decent sized string.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Do a select txt from a_long and all is well.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Do a select ‘@’ + txt from a_long and you are greeted with: E_SC0206<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Plus a host of message in the errlog indicating the length of the object is screwed up.<o:p></o:p></p>
<p class="MsoNormal">DBHUB_NDPH_OX_AC_U::[43371 , 2844 , 00007fd9d309c200, aduredeem.c:888 ]: Thu Oct 12 13:50:03 2017 E_AD7004_BAD_BLOB A peripheral datatype (BLOB) was found whose coupon length did not agree with the amount of data
found.<o:p></o:p></p>
<p class="MsoNormal">DBHUB_NDPH_OX_AC_U::[43371 , 2844 , 00007fd9d309c200, scsqncr.c:14173 ]: Thu Oct 12 13:50:03 2017 E_SC0216_QEF_ERROR Error returned by QEF.<o:p></o:p></p>
<p class="MsoNormal">DBHUB_NDPH_OX_AC_U::[43371 , 2844 , 00007fd9d309c200, scsqncr.c:14174 ]: Thu Oct 12 13:50:03 2017 E_SC0206_CANNOT_PROCESS An internal error prevents further processing of this query.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now the funny bit. I’m going to use string concatenation inside a database procedure:<o:p></o:p></p>
<p class="MsoNormal">create procedure insert_long<o:p></o:p></p>
<p class="MsoNormal">as declare<o:p></o:p></p>
<p class="MsoNormal"> msg varchar(256) not null not default;<o:p></o:p></p>
<p class="MsoNormal"> items long varchar not null not default;<o:p></o:p></p>
<p class="MsoNormal">begin<o:p></o:p></p>
<p class="MsoNormal"> select txt into :items from a_long;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> insert into another_long(txt)<o:p></o:p></p>
<p class="MsoNormal"> values(<o:p></o:p></p>
<p class="MsoNormal"> '@' + items<o:p></o:p></p>
<p class="MsoNormal"> );<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">end;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">execute procedure insert_long…<o:p></o:p></p>
<p class="MsoNormal">No error is generated but a select txt from another_long shows the data is mangled.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On one consistent example I have a string which contains the element: ^F21000[10&i#nc=7&i#ety=11&i#eid=1001&i#c0=2&i#c1=4&i#c2=2001&i#c3=2002&i#c4=4001&i#c5=4002&i#c6=4003]^F21001<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But the data inserted into another_long has become:<o:p></o:p></p>
<p class="MsoNormal">^F21000[10&i#nc=7&i#ety=11&i#eid=1001&i#c0=2&i#c1=4&i#c2=2001&i#c3=2002&i#c4=4001&i#c5=4002&i#c=4003]^F21001^<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Yes I am going to raise a bug.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Martin Bowes<o:p></o:p></p>
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