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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-12881" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-26bb522b-e09e-42bc-ad8d-cdf553f42423" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12881" style="color: #3b73af; text-decoration: none">HHH-12881</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-12881" style="color: #3b73af; text-decoration: none">Improve support for Clob, Blob, and Nationalized Variants</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-26bb522b-e09e-42bc-ad8d-cdf553f42423" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"> Improvement </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="crancran" id="email_crancran" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=crancran" style="color:#6c797f;; color: #3b73af; text-decoration: none">Chris Cranford</a> </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-envers </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 02/Aug/2018 08:20 AM </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-f22523da-c095-4429-9f5e-dc78f6671103" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="crancran" id="email_crancran" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=crancran" style="color:#6c797f;; color: #3b73af; text-decoration: none">Chris Cranford</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">While working on <span class="jira-issue-macro resolved" data-jira-key="HHH-12834"> <a href="https://hibernate.atlassian.net/browse/HHH-12834" class="jira-issue-macro-key issue-link" title="org.hibernate.envers.test.integration.collection.StringMapNationalizedLobTest fails with Sybase" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12143&avatarType=issuetype"> HHH-12834 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-success jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Resolved</span> </span> , it has become clear that the support for Clob, Blob, NClob, and NBlob types in can be problematic, particularly when an element-collection is in play such as </p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@ElementCollection
@Lob
@Nationalized
<span class="code-keyword" style="color: #000091">private</span> Map<<span class="code-object" style="color: #910091">String</span>, <span class="code-object" style="color: #910091">String</span>> values;
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">From the Envers perspective, mappers and initializors tend to build queries using properties regardless of their data types. This leads to issues for data types such as clob and blob where certain database platforms only support a limited subset of predicates against those column types.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">For example, Sybase only allows <tt>LIKE</tt> and <tt>IS <span class="error">[NOT]</span> NULL</tt> predicates on clob columns. This in particular leads to issues with the QueryGenerator implementions interating with mappers to initialize lazy collections, etc.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">A great example is <tt>StringMapNationalizedLobTest</tt> which was highlighted as a problem in <span class="jira-issue-macro resolved" data-jira-key="HHH-12834"> <a href="https://hibernate.atlassian.net/browse/HHH-12834" class="jira-issue-macro-key issue-link" title="org.hibernate.envers.test.integration.collection.StringMapNationalizedLobTest fails with Sybase" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12143&avatarType=issuetype"> HHH-12834 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-success jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Resolved</span> </span> . We temporarily disabled the test because the underlying problem goes deeper than dealing with the translation of CLOB to UNITEXT for Sybase.</p> </td>
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