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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-12087" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-4d7ed5ba-25dd-4b3e-9471-e16fdff708a4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12087" style="color: #3b73af; text-decoration: none">HHH-12087</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-12087" style="color: #3b73af; text-decoration: none">Pagination works incorrect with Oracle views</a> </span> </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="rustem.yagudin" id="email_rustem.yagudin" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=rustem.yagudin" style="color:#6c797f;; color: #3b73af; text-decoration: none">Rustem Yagudin</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"> <span class="diffcontext">Hibernate pagination generated script execution return incorrect data.<br><br>I found this when I have retrieved data from a view. I have created table, data, view [generation script|^mytable.sql] for you to reproduce this bug.<br><br>According to hibernate sources *getLimitString* method from *org.hibernate.dialect.Oracle9iDialect*<br><br>Lets first select all rows from view:<br><br>{code:sql}<br>select * from v_mytable_last order by status desc<br>{code}<br>Result:<br>||RowNumber||ID||VERSION||CAPTION||STATUS||<br>|1|1 |7 |t40 |2|<br>|2|16 |1 |t47 |2|<br>|3|11 |2 |t43 |2|<br>|4|6 |4 |t31 |2|<br>|5|15 |1 |t46 |2|<br>|6|2 |6 |t39 |2|<br>|7|14 |1 |t45 |2|<br>|8|4 |5 |t38 |2|<br>|9|8 |2 |t29 |2|<br>|10|17 |1 |t48 |2|<br>|11|3 |3 |t21 |2|<br>|12|7 |2 |t23 |2|<br>|13|9 |2 |t30 |2|<br>|14|10 |3 |t42 |2|<br>|15|12 |1 |t41 |2|<br>|16|5 |6 |t37 |1|<br>|17|13 |1 |t44 |1|<br><br>After that is we are using hibernate pagination for first page then we have an appended code at first and last line of request:<br><br>{code:sql}<br>select * from ( <br>select * from v_mytable_last order by status desc<br> ) where rownum <= 5<br>{code}<br>Result:<br>||RowNumber||ID||VERSION||CAPTION||STATUS||<br>|1|1 |7 |t40 |2|<br>|2|14 |1 |t45 |2|<br>|3|2 |6 |t39 |2|<br>|4|6 |4 |t31 |2|<br>|5|11 |2 |t43 |2|<br><br>And for second page we are having offset so hibernate execute:<br><br>{code:sql}<br>select * from (</span> <span class="diffaddedchars" style="background-color:#ddfade;"> select row_.*, rownum rownum_ from (</span> <span class="diffcontext"> <br>select * from v_mytable_last order by status desc<br> )</span> <span class="diffaddedchars" style="background-color:#ddfade;"> row_</span> <span class="diffcontext"> where rownum <=</span> <span class="diffaddedchars" style="background-color:#ddfade;"> 10) where rownum_ ></span> <span class="diffcontext"> 5<br>{code}<br>Result:<br>||RowNumber||ID||VERSION||CAPTION||STATUS||ROWNUM_||<br>|1 |4 |5 |t38 |2 |6 |<br>|2 |14 |1 |t45 |2 |7 |<br>|3 |2 |6 |t39 |2 |8 |<br>|4 |6 |4 |t31 |2 |9 |<br>|5 |11 |2 |t43 |2 |10 |<br><br>You can see for the second page ROWNUM_ seem to be correct but the data is *not*.<br>I was wonder to find this bug. I found it reproducible only for my view, not for table.<br><br>To solve this issue I has to override dialect and use my own implementation:<br><br>{code:groovy}<br> final StringBuilder pagingSelect = new StringBuilder( sql.length() + 100 )<br> pagingSelect.append( "select * from ( select row_.*, rownum rownum_ from ( " )<br> pagingSelect.append( sql )<br> if (hasOffset) {<br> pagingSelect.append( " ) row_ ) where rownum_ <= ? and rownum_ > ? " )<br> }<br> else {<br> pagingSelect.append( " ) row_ ) where rownum_ <= ?" )<br> }<br>{code}<br>This code is working correct for views as well as for tables.</span> </td>
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