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<div class="subTitle">org.apache.calcite.sql</div>
<h2 title="类 SqlNode" class="title">类 SqlNode</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<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>
<li>
<ul class="inheritance">
<li>org.apache.calcite.sql.SqlNode</li>
</ul>
</li>
</ul>
<div class="description">
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<dl>
<dt>所有已实现的接口:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="java.lang中的类或接口">Cloneable</a></dd>
</dl>
<dl>
<dt>直接已知子类:</dt>
<dd><a href="../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a>, <a href="../../../../org/apache/calcite/sql/SqlDataTypeSpec.html" title="org.apache.calcite.sql中的类">SqlDataTypeSpec</a>, <a href="../../../../org/apache/calcite/sql/SqlDynamicParam.html" title="org.apache.calcite.sql中的类">SqlDynamicParam</a>, <a href="../../../../org/apache/calcite/sql/SqlIdentifier.html" title="org.apache.calcite.sql中的类">SqlIdentifier</a>, <a href="../../../../org/apache/calcite/sql/SqlIntervalQualifier.html" title="org.apache.calcite.sql中的类">SqlIntervalQualifier</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a>, <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></dd>
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<pre>public abstract class <span class="typeNameLabel">SqlNode</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>
implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="java.lang中的类或接口">Cloneable</a></pre>
<div class="block">A <code>SqlNode</code> is a SQL parse tree.
<p>It may be an
<a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类"><code>operator</code></a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类"><code>literal</code></a>,
<a href="../../../../org/apache/calcite/sql/SqlIdentifier.html" title="org.apache.calcite.sql中的类"><code>identifier</code></a>, and so forth.</div>
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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 <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#EMPTY_ARRAY">EMPTY_ARRAY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#pos">pos</a></span></code>&nbsp;</td>
</tr>
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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="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">已过时的方法</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>abstract &lt;R&gt;&nbsp;R</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#accept-org.apache.calcite.sql.util.SqlVisitor-">accept</a></span>(<a href="../../../../org/apache/calcite/sql/util/SqlVisitor.html" title="org.apache.calcite.sql.util中的接口">SqlVisitor</a>&lt;R&gt;&nbsp;visitor)</code>
<div class="block">Accepts a generic visitor.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#clone--">clone</a></span>()</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;
<div class="block"><span class="deprecationComment">Please use <a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-E-"><code>clone(SqlNode)</code></a>; this method brings
along too much baggage from early versions of Java</span></div>
</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static &lt;E extends <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;<br>E</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-E-">clone</a></span>(E&nbsp;e)</code>
<div class="block">Creates a copy of a SqlNode.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>abstract <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-org.apache.calcite.sql.parser.SqlParserPos-">clone</a></span>(<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos)</code>
<div class="block">Clones a SqlNode with a different position.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#cloneArray-org.apache.calcite.sql.SqlNode:A-">cloneArray</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[]&nbsp;nodes)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#equalDeep-java.util.List-java.util.List-org.apache.calcite.util.Litmus-">equalDeep</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;&nbsp;operands0,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;&nbsp;operands1,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</code>
<div class="block">Returns whether two lists of operands are equal.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#equalDeep-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNode-org.apache.calcite.util.Litmus-">equalDeep</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node1,
<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node2,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</code>
<div class="block">Returns whether two nodes are equal (using
<a href="../../../../org/apache/calcite/sql/SqlNode.html#equalsDeep-org.apache.calcite.sql.SqlNode-org.apache.calcite.util.Litmus-"><code>equalsDeep(SqlNode, Litmus)</code></a>) or are both null.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#equalsDeep-org.apache.calcite.sql.SqlNode-boolean-">equalsDeep</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node,
boolean&nbsp;fail)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>abstract boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#equalsDeep-org.apache.calcite.sql.SqlNode-org.apache.calcite.util.Litmus-">equalsDeep</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</code>
<div class="block">Returns whether this node is structurally equivalent to another node.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#findValidOptions-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.parser.SqlParserPos-java.util.Collection-">findValidOptions</a></span>(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope,
<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="java.util中的类或接口">Collection</a>&lt;<a href="../../../../org/apache/calcite/sql/validate/SqlMoniker.html" title="org.apache.calcite.sql.validate中的接口">SqlMoniker</a>&gt;&nbsp;hintList)</code>
<div class="block">Lists all the valid alternatives for this node if the parse position of
the node matches that of pos.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#getKind--">getKind</a></span>()</code>
<div class="block">Returns the type of node this is, or
<a href="../../../../org/apache/calcite/sql/SqlKind.html#OTHER"><code>SqlKind.OTHER</code></a> if it's nothing special.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/validate/SqlMonotonicity.html" title="org.apache.calcite.sql.validate中的枚举">SqlMonotonicity</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#getMonotonicity-org.apache.calcite.sql.validate.SqlValidatorScope-">getMonotonicity</a></span>(<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</code>
<div class="block">Returns whether expression is always ascending, descending or constant.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#getParserPosition--">getParserPosition</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#isA-java.util.Set-">isA</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a>&gt;&nbsp;category)</code>
<div class="block">Returns whether this node is a member of an aggregate category.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-org.apache.calcite.sql.SqlDialect-">toSqlString</a></span>(<a href="../../../../org/apache/calcite/sql/SqlDialect.html" title="org.apache.calcite.sql中的类">SqlDialect</a>&nbsp;dialect)</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-org.apache.calcite.sql.SqlDialect-boolean-">toSqlString</a></span>(<a href="../../../../org/apache/calcite/sql/SqlDialect.html" title="org.apache.calcite.sql中的类">SqlDialect</a>&nbsp;dialect,
boolean&nbsp;forceParens)</code>
<div class="block">Returns the SQL text of the tree of which this <code>SqlNode</code> is
the root.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-java.util.function.UnaryOperator-">toSqlString</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html?is-external=true" title="java.util.function中的类或接口">UnaryOperator</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlWriterConfig.html" title="org.apache.calcite.sql中的接口">SqlWriterConfig</a>&gt;&nbsp;transform)</code>
<div class="block">Returns the SQL text of the tree of which this <code>SqlNode</code> is
the root.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#toString--">toString</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-">unparse</a></span>(<a href="../../../../org/apache/calcite/sql/SqlWriter.html" title="org.apache.calcite.sql中的接口">SqlWriter</a>&nbsp;writer,
int&nbsp;leftPrec,
int&nbsp;rightPrec)</code>
<div class="block">Writes a SQL representation of this node to a writer.</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#validate-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">validate</a></span>(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</code>
<div class="block">Validates this node.</div>
</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNode.html#validateExpr-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">validateExpr</a></span>(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</code>
<div class="block">Validates this node in an expression context.</div>
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<code><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#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>
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<pre>public static final&nbsp;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[] EMPTY_ARRAY</pre>
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<pre>protected final&nbsp;<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a> pos</pre>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
public&nbsp;<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>&nbsp;clone()</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;<span class="deprecationComment">Please use <a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-E-"><code>clone(SqlNode)</code></a>; this method brings
along too much baggage from early versions of Java</span></div>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><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></code>&nbsp;在类中&nbsp;<code><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></code></dd>
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<pre>public static&nbsp;&lt;E extends <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;&nbsp;E&nbsp;clone(E&nbsp;e)</pre>
<div class="block">Creates a copy of a SqlNode.</div>
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<pre>public abstract&nbsp;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;clone(<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos)</pre>
<div class="block">Clones a SqlNode with a different position.</div>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nonnull.html?is-external=true" title="javax.annotation中的类或接口">@Nonnull</a>
public&nbsp;<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a>&nbsp;getKind()</pre>
<div class="block">Returns the type of node this is, or
<a href="../../../../org/apache/calcite/sql/SqlKind.html#OTHER"><code>SqlKind.OTHER</code></a> if it's nothing special.</div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>a <a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举"><code>SqlKind</code></a> value, never null</dd>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../org/apache/calcite/sql/SqlNode.html#isA-java.util.Set-"><code>isA(java.util.Set&lt;org.apache.calcite.sql.SqlKind&gt;)</code></a></dd>
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<h4>isA</h4>
<pre>public final&nbsp;boolean&nbsp;isA(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="org.apache.calcite.sql中的枚举">SqlKind</a>&gt;&nbsp;category)</pre>
<div class="block">Returns whether this node is a member of an aggregate category.
<p>For example, <code>node.isA(SqlKind.QUERY)</code> returns <code>true</code>
if the node is a SELECT, INSERT, UPDATE etc.
<p>This method is shorthand: <code>node.isA(category)</code> is always
equivalent to <code>node.getKind().belongsTo(category)</code>.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>category</code> - Category</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether this node belongs to the given category.</dd>
</dl>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
public static&nbsp;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[]&nbsp;cloneArray(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>[]&nbsp;nodes)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<pre>public&nbsp;<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;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><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></code>&nbsp;在类中&nbsp;<code><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></code></dd>
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<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a>&nbsp;toSqlString(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html?is-external=true" title="java.util.function中的类或接口">UnaryOperator</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlWriterConfig.html" title="org.apache.calcite.sql中的接口">SqlWriterConfig</a>&gt;&nbsp;transform)</pre>
<div class="block">Returns the SQL text of the tree of which this <code>SqlNode</code> is
the root.
<p>Typical return values are:
<ul>
<li>'It''s a bird!'
<li>NULL
<li>12.3
<li>DATE '1969-04-29'
</ul></div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>transform</code> - Transform that sets desired writer configuration</dd>
</dl>
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<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a>&nbsp;toSqlString(<a href="../../../../org/apache/calcite/sql/SqlDialect.html" title="org.apache.calcite.sql中的类">SqlDialect</a>&nbsp;dialect,
boolean&nbsp;forceParens)</pre>
<div class="block">Returns the SQL text of the tree of which this <code>SqlNode</code> is
the root.
<p>Typical return values are:
<ul>
<li>'It''s a bird!'
<li>NULL
<li>12.3
<li>DATE '1969-04-29'
</ul></div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>dialect</code> - Dialect (null for ANSI SQL)</dd>
<dd><code>forceParens</code> - Whether to wrap all expressions in parentheses;
useful for parse test, but false by default</dd>
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<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/util/SqlString.html" title="org.apache.calcite.sql.util中的类">SqlString</a>&nbsp;toSqlString(<a href="../../../../org/apache/calcite/sql/SqlDialect.html" title="org.apache.calcite.sql中的类">SqlDialect</a>&nbsp;dialect)</pre>
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<pre>public abstract&nbsp;void&nbsp;unparse(<a href="../../../../org/apache/calcite/sql/SqlWriter.html" title="org.apache.calcite.sql中的接口">SqlWriter</a>&nbsp;writer,
int&nbsp;leftPrec,
int&nbsp;rightPrec)</pre>
<div class="block">Writes a SQL representation of this node to a writer.
<p>The <code>leftPrec</code> and <code>rightPrec</code> parameters give
us enough context to decide whether we need to enclose the expression in
parentheses. For example, we need parentheses around "2 + 3" if preceded
by "5 *". This is because the precedence of the "*" operator is greater
than the precedence of the "+" operator.
<p>The algorithm handles left- and right-associative operators by giving
them slightly different left- and right-precedence.
<p>If <a href="../../../../org/apache/calcite/sql/SqlWriter.html#isAlwaysUseParentheses--"><code>SqlWriter.isAlwaysUseParentheses()</code></a> is true, we use
parentheses even when they are not required by the precedence rules.
<p>For the details of this algorithm, see <a href="../../../../org/apache/calcite/sql/SqlCall.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-"><code>SqlCall.unparse(org.apache.calcite.sql.SqlWriter, int, int)</code></a>.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>writer</code> - Target writer</dd>
<dd><code>leftPrec</code> - The precedence of the <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类"><code>SqlNode</code></a> immediately
preceding this node in a depth-first scan of the parse
tree</dd>
<dd><code>rightPrec</code> - The precedence of the <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类"><code>SqlNode</code></a> immediately</dd>
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<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;getParserPosition()</pre>
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<pre>public abstract&nbsp;void&nbsp;validate(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</pre>
<div class="block">Validates this node.
<p>The typical implementation of this method will make a callback to the
validator appropriate to the node type and context. The validator has
methods such as <a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html#validateLiteral-org.apache.calcite.sql.SqlLiteral-"><code>SqlValidator.validateLiteral(org.apache.calcite.sql.SqlLiteral)</code></a> for these purposes.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>scope</code> - Validator</dd>
</dl>
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<pre>public&nbsp;void&nbsp;findValidOptions(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope,
<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="java.util中的类或接口">Collection</a>&lt;<a href="../../../../org/apache/calcite/sql/validate/SqlMoniker.html" title="org.apache.calcite.sql.validate中的接口">SqlMoniker</a>&gt;&nbsp;hintList)</pre>
<div class="block">Lists all the valid alternatives for this node if the parse position of
the node matches that of pos. Only implemented now for SqlCall and
SqlOperator.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>validator</code> - Validator</dd>
<dd><code>scope</code> - Validation scope</dd>
<dd><code>pos</code> - SqlParserPos indicating the cursor position at which
completion hints are requested for</dd>
<dd><code>hintList</code> - list of valid options</dd>
</dl>
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<pre>public&nbsp;void&nbsp;validateExpr(<a href="../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="org.apache.calcite.sql.validate中的接口">SqlValidator</a>&nbsp;validator,
<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</pre>
<div class="block">Validates this node in an expression context.
<p>Usually, this method does much the same as <a href="../../../../org/apache/calcite/sql/SqlNode.html#validate-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-"><code>validate(org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorScope)</code></a>, but a
<a href="../../../../org/apache/calcite/sql/SqlIdentifier.html" title="org.apache.calcite.sql中的类"><code>SqlIdentifier</code></a> can occur in expression and non-expression
contexts.</div>
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<pre>public abstract&nbsp;&lt;R&gt;&nbsp;R&nbsp;accept(<a href="../../../../org/apache/calcite/sql/util/SqlVisitor.html" title="org.apache.calcite.sql.util中的接口">SqlVisitor</a>&lt;R&gt;&nbsp;visitor)</pre>
<div class="block">Accepts a generic visitor.
<p>Implementations of this method in subtypes simply call the appropriate
<code>visit</code> method on the
<a href="../../../../org/apache/calcite/sql/util/SqlVisitor.html" title="org.apache.calcite.sql.util中的接口"><code>visitor object</code></a>.
<p>The type parameter <code>R</code> must be consistent with the type
parameter of the visitor.</div>
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<pre>public abstract&nbsp;boolean&nbsp;equalsDeep(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</pre>
<div class="block">Returns whether this node is structurally equivalent to another node.
Some examples:
<ul>
<li>1 + 2 is structurally equivalent to 1 + 2</li>
<li>1 + 2 + 3 is structurally equivalent to (1 + 2) + 3, but not to 1 +
(2 + 3), because the '+' operator is left-associative</li>
</ul></div>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
public final&nbsp;boolean&nbsp;equalsDeep(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node,
boolean&nbsp;fail)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<pre>public static&nbsp;boolean&nbsp;equalDeep(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node1,
<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;node2,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</pre>
<div class="block">Returns whether two nodes are equal (using
<a href="../../../../org/apache/calcite/sql/SqlNode.html#equalsDeep-org.apache.calcite.sql.SqlNode-org.apache.calcite.util.Litmus-"><code>equalsDeep(SqlNode, Litmus)</code></a>) or are both null.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>node1</code> - First expression</dd>
<dd><code>node2</code> - Second expression</dd>
<dd><code>litmus</code> - What to do if an error is detected (expressions are
not equal)</dd>
</dl>
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<h4>getMonotonicity</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/validate/SqlMonotonicity.html" title="org.apache.calcite.sql.validate中的枚举">SqlMonotonicity</a>&nbsp;getMonotonicity(<a href="../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a>&nbsp;scope)</pre>
<div class="block">Returns whether expression is always ascending, descending or constant.
This property is useful because it allows to safely aggregate infinite
streams of values.
<p>The default implementation returns
<a href="../../../../org/apache/calcite/sql/validate/SqlMonotonicity.html#NOT_MONOTONIC"><code>SqlMonotonicity.NOT_MONOTONIC</code></a>.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>scope</code> - Scope</dd>
</dl>
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<pre>public static&nbsp;boolean&nbsp;equalDeep(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;&nbsp;operands0,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&gt;&nbsp;operands1,
<a href="../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus)</pre>
<div class="block">Returns whether two lists of operands are equal.</div>
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