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 <div class="subTitle">org.apache.calcite.util</div>
 <h2 title="类 Bug" class="title">类 Bug</h2>
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 <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">java.lang.Object</a></li>
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 <li>org.apache.calcite.util.Bug</li>
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 <pre>public abstract class <span class="typeNameLabel">Bug</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></pre>
 <div class="block">Holder for a list of constants describing which bugs which have not been
  fixed.

  <p>You can use these constants to control the flow of your code. For example,
  suppose that bug CALCITE-123 causes the "INSERT" statement to return an
  incorrect row-count, and you want to disable unit tests. You might use the
  constant in your code as follows:

  <blockquote>
  <pre>Statement stmt = connection.createStatement();
  int rowCount = stmt.execute(
      "INSERT INTO FemaleEmps SELECT * FROM Emps WHERE gender = 'F'");
  if (Bug.CALCITE_123_FIXED) {
     assertEquals(rowCount, 5);
  }</pre>
  </blockquote>

  <p>The usage of the constant is a convenient way to identify the impact of
  the bug. When someone fixes the bug, they will remove the constant and all
  usages of it. Also, the constant helps track the propagation of the fix: as
  the fix is integrated into other branches, the constant will be removed from
  those branches.</p></div>
 </li>
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 <ul class="blockList">
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 <!-- =========== FIELD SUMMARY =========== -->
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 <h3>字段概要</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释">
 <caption><span>字段</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">限定符和类型</th>
 <th class="colLast" scope="col">字段和说明</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_1045_FIXED">CALCITE_1045_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-1045">[CALCITE-1045]
  Decorrelate sub-queries in Project and Join</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_1048_FIXED">CALCITE_1048_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-1048">[CALCITE-1048]
  Make metadata more robust</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_194_FIXED">CALCITE_194_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-194">[CALCITE-194]
  Array items in MongoDB adapter</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_2223_FIXED">CALCITE_2223_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-2223">[CALCITE-2223]
  ProjectMergeRule is infinitely matched when is applied after ProjectReduceExpressions Rule</a>
  is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_2400_FIXED">CALCITE_2400_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-2400">[CALCITE-2400]
  Allow standards-compliant column ordering for NATURAL JOIN and JOIN USING
  when dynamic tables are used</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_2401_FIXED">CALCITE_2401_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-2401">[CALCITE-2401]
  Improve RelMdPredicates performance</a></div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_2539_FIXED">CALCITE_2539_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-2539">[CALCITE-2539]
  Several test case not passed in CalciteSqlOperatorTest.java</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_2869_FIXED">CALCITE_2869_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-2869">[CALCITE-2869]
  JSON data type support</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_3243_FIXED">CALCITE_3243_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-3243">[CALCITE-3243]
  Incomplete validation of operands in JSON functions</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#CALCITE_673_FIXED">CALCITE_673_FIXED</a></span></code>
 <div class="block">Whether
  <a href="https://issues.apache.org/jira/browse/CALCITE-673">[CALCITE-673]
  Timeout executing joins against MySQL</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#DT1684_FIXED">DT1684_FIXED</a></span></code>
 <div class="block">Whether dtbug1684 "CURRENT_DATE not implemented in fennel calc" is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#DT239_FIXED">DT239_FIXED</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#DT785_FIXED">DT785_FIXED</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FNL25_FIXED">FNL25_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FNL-25">issue
  FNL-25</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FNL3_FIXED">FNL3_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FNL-3">issue
  Fnl-3</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG189_FIXED">FRG189_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-189">issue
  FRG-189: FarragoAutoVmOperatorTest.testSelect fails</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG254_FIXED">FRG254_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-254">issue
  FRG-254: environment-dependent failure for
  SqlOperatorTest.testPrefixPlusOperator</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG282_FIXED">FRG282_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-282">issue
  FRG-282: Support precision in TIME and TIMESTAMP data types</a> is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG296_FIXED">FRG296_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-296">issue
  FRG-296: SUBSTRING(string FROM regexp FOR regexp)</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG327_FIXED">FRG327_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-327">issue
  FRG-327: AssertionError while translating IN list that contains null</a>
  is fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG375_FIXED">FRG375_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-375">issue
  FRG-375: The expression VALUES ('cd' SIMILAR TO '[a-e^c]d') returns TRUE.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG377_FIXED">FRG377_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-377">issue
  FRG-377: Regular character set identifiers defined in SQL:2008 spec like
  :ALPHA:, * :UPPER:, :LOWER:, ... etc. are not yet implemented in
  SIMILAR TO expressions.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG73_FIXED">FRG73_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-73">issue FRG-73:
  miscellaneous bugs with nested comments</a> is fixed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#FRG78_FIXED">FRG78_FIXED</a></span></code>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-78">issue FRG-78:
  collation clause should be on expression instead of identifier</a> is
  fixed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#TODO_FIXED">TODO_FIXED</a></span></code>
 <div class="block">Use this to flag temporary code.</div>
 </td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <ul class="blockList">
 <li class="blockList"><a name="constructor.summary">
 <!--   -->
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 <h3>构造器概要</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释">
 <caption><span>构造器</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">构造器和说明</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#Bug--">Bug</a></span>()</code>&nbsp;</td>
 </tr>
 </table>
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 <!-- ========== METHOD SUMMARY =========== -->
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 <h3>方法概要</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
 <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">限定符和类型</th>
 <th class="colLast" scope="col">方法和说明</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>static &lt;T&gt;&nbsp;T</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#remark-T-">remark</a></span>(T&nbsp;remark)</code>
 <div class="block">Use this method to flag temporary code.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/Bug.html#upgrade-java.lang.String-">upgrade</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;remark)</code>
 <div class="block">Use this method to flag code that should be re-visited after upgrading
  a component.</div>
 </td>
 </tr>
 </table>
 <ul class="blockList">
 <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
 <!--   -->
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 <h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3>
 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
 </ul>
 </li>
 </ul>
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 <!-- ============ FIELD DETAIL =========== -->
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 <h3>字段详细资料</h3>
 <a name="DT239_FIXED">
 <!--   -->
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 <ul class="blockList">
 <li class="blockList">
 <h4>DT239_FIXED</h4>
 <pre>public static final&nbsp;boolean DT239_FIXED</pre>
 <dl>
 <dt><span class="seeLabel">另请参阅:</span></dt>
 <dd><a href="../../../../constant-values.html#org.apache.calcite.util.Bug.DT239_FIXED">常量字段值</a></dd>
 </dl>
 </li>
 </ul>
 <a name="DT785_FIXED">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>DT785_FIXED</h4>
 <pre>public static final&nbsp;boolean DT785_FIXED</pre>
 <dl>
 <dt><span class="seeLabel">另请参阅:</span></dt>
 <dd><a href="../../../../constant-values.html#org.apache.calcite.util.Bug.DT785_FIXED">常量字段值</a></dd>
 </dl>
 </li>
 </ul>
 <a name="FNL3_FIXED">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>FNL3_FIXED</h4>
 <pre>public static final&nbsp;boolean FNL3_FIXED</pre>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FNL-3">issue
  Fnl-3</a> is fixed.</div>
 <dl>
 <dt><span class="seeLabel">另请参阅:</span></dt>
 <dd><a href="../../../../constant-values.html#org.apache.calcite.util.Bug.FNL3_FIXED">常量字段值</a></dd>
 </dl>
 </li>
 </ul>
 <a name="FRG327_FIXED">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>FRG327_FIXED</h4>
 <pre>public static final&nbsp;boolean FRG327_FIXED</pre>
 <div class="block">Whether <a href="http://issues.eigenbase.org/browse/FRG-327">issue
  FRG-327: AssertionError while translating IN list that contains null</a>
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 <dl>
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  JSON data type support</a> is fixed.</div>
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  Incomplete validation of operands in JSON functions</a> is fixed.</div>
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 <dt><span class="seeLabel">另请参阅:</span></dt>
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