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<p class="MsoNormal"><span style="color:#1F497D">Hi Ian,<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 don’t see this as a bug, just a state of play. Might be a good idea for it to be documented in the SQL guide somewhere but that’s as far as I’d go.<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">FYI. Geraint Jones has informed me that:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D">Various DBMS’s disagree on how to handle cast(‘’ as integer).<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D"><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D">Ingres : 0.<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D">Oracle : NULL.<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D">Postgres : Error.<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="color:#1F497D">MySQL : 0.<o:p></o:p></span></i></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""> Ian Kirkham [mailto:Ian.Kirkham@actian.com]
<br>
<b>Sent:</b> 11 May 2016 13:51<br>
<b>To:</b> Martin Bowes; info-ingres@lists.planetingres.org<br>
<b>Subject:</b> RE: [Info-ingres] When is an empty string an integer?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Hi Marty,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Historically Ingres has always treated a string of just zero or more space characters as numeric 0 on conversion to integers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">MS excel does the same so it must be an industry standard -
</span><span style="font-family:Wingdings;color:#1F497D;mso-fareast-language:EN-US">J</span><span style="color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Not something we could easily correct now.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-fareast-language:EN-US">Ian<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> <a href="mailto:info-ingres-bounces@lists.planetingres.org">
info-ingres-bounces@lists.planetingres.org</a> [<a href="mailto:info-ingres-bounces@lists.planetingres.org">mailto:info-ingres-bounces@lists.planetingres.org</a>]
<b>On Behalf Of </b>Martin Bowes<br>
<b>Sent:</b> 11 May 2016 13:42<br>
<b>To:</b> <a href="mailto:info-ingres@lists.planetingres.org">info-ingres@lists.planetingres.org</a><br>
<b>Subject:</b> [Info-ingres] When is an empty string an integer?<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">This is probably documented behaviour but I’m having a hard time finding it. So if someone could point me at the document I’d be happy.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What is the expected result of: select integer(varchar('', 1))<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The answer is zero.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I must concede I can sort of see this as being necessary, but I’m curious as to why we just didn’t get the standard error:<o:p></o:p></p>
<p class="MsoNormal">E_US100F String cannot be converted to numeric due to incorrect syntax.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Martin Bowes<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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