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 <div class="subTitle">org.apache.calcite.sql</div>
 <h2 title="类 SqlSelect" class="title">类 SqlSelect</h2>
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 <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><a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">org.apache.calcite.sql.SqlNode</a></li>
 <li>
 <ul class="inheritance">
 <li><a href="../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">org.apache.calcite.sql.SqlCall</a></li>
 <li>
 <ul class="inheritance">
 <li>org.apache.calcite.sql.SqlSelect</li>
 </ul>
 </li>
 </ul>
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 <dt>所有已实现的接口:</dt>
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 <pre>public class <span class="typeNameLabel">SqlSelect</span>
 extends <a href="../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a></pre>
 <div class="block">A <code>SqlSelect</code> is a node of a parse tree which represents a select
  statement. It warrants its own node type just because we have a lot of
  methods to put somewhere.</div>
 </li>
 </ul>
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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 int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#FROM_OPERAND">FROM_OPERAND</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#HAVING_OPERAND">HAVING_OPERAND</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#WHERE_OPERAND">WHERE_OPERAND</a></span></code>&nbsp;</td>
 </tr>
 </table>
 <ul class="blockList">
 <li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.sql.SqlNode">
 <!--   -->
 </a>
 <h3>从类继承的字段&nbsp;org.apache.calcite.sql.<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a></h3>
 <code><a href="../../../../org/apache/calcite/sql/SqlNode.html#EMPTY_ARRAY">EMPTY_ARRAY</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#pos">pos</a></code></li>
 </ul>
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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/sql/SqlSelect.html#SqlSelect-org.apache.calcite.sql.parser.SqlParserPos-org.apache.calcite.sql.SqlNodeList-org.apache.calcite.sql.SqlNodeList-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNodeList-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNodeList-org.apache.calcite.sql.SqlNodeList-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.SqlNodeList-">SqlSelect</a></span>(<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;keywordList,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;selectList,
          <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;from,
          <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;where,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;groupBy,
          <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;having,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;windowDecls,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;orderBy,
          <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;offset,
          <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;fetch,
          <a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;hints)</code>&nbsp;</td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ========== METHOD SUMMARY =========== -->
 <ul class="blockList">
 <li class="blockList"><a name="method.summary">
 <!--   -->
 </a>
 <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="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</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><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/SqlSelect.html#getFetch--">getFetch</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code><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/SqlSelect.html#getFrom--">getFrom</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getGroup--">getGroup</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code><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/SqlSelect.html#getHaving--">getHaving</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getHints--">getHints</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i5" class="rowColor">
 <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/SqlSelect.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="i6" class="altColor">
 <td class="colFirst"><code><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/SqlSelect.html#getModifierNode-org.apache.calcite.sql.SqlSelectKeyword-">getModifierNode</a></span>(<a href="../../../../org/apache/calcite/sql/SqlSelectKeyword.html" title="org.apache.calcite.sql中的枚举">SqlSelectKeyword</a>&nbsp;modifier)</code>&nbsp;</td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><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/SqlSelect.html#getOffset--">getOffset</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code><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;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getOperandList--">getOperandList</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="org.apache.calcite.sql中的类">SqlOperator</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getOperator--">getOperator</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getOrderList--">getOrderList</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getSelectList--">getSelectList</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><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/SqlSelect.html#getWhere--">getWhere</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#getWindowList--">getWindowList</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#hasHints--">hasHints</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#hasOrderBy--">hasOrderBy</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#hasWhere--">hasWhere</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#isDistinct--">isDistinct</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#isKeywordPresent-org.apache.calcite.sql.SqlSelectKeyword-">isKeywordPresent</a></span>(<a href="../../../../org/apache/calcite/sql/SqlSelectKeyword.html" title="org.apache.calcite.sql中的枚举">SqlSelectKeyword</a>&nbsp;targetKeyWord)</code>&nbsp;</td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setFetch-org.apache.calcite.sql.SqlNode-">setFetch</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;fetch)</code>&nbsp;</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/SqlSelect.html#setFrom-org.apache.calcite.sql.SqlNode-">setFrom</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;from)</code>&nbsp;</td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setGroupBy-org.apache.calcite.sql.SqlNodeList-">setGroupBy</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;groupBy)</code>&nbsp;</td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setHaving-org.apache.calcite.sql.SqlNode-">setHaving</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;having)</code>&nbsp;</td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setHints-org.apache.calcite.sql.SqlNodeList-">setHints</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;hints)</code>&nbsp;</td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setOffset-org.apache.calcite.sql.SqlNode-">setOffset</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;offset)</code>&nbsp;</td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setOperand-int-org.apache.calcite.sql.SqlNode-">setOperand</a></span>(int&nbsp;i,
           <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;operand)</code>
 <div class="block">Changes the value of an operand.</div>
 </td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setOrderBy-org.apache.calcite.sql.SqlNodeList-">setOrderBy</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;orderBy)</code>&nbsp;</td>
 </tr>
 <tr id="i27" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setSelectList-org.apache.calcite.sql.SqlNodeList-">setSelectList</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNodeList.html" title="org.apache.calcite.sql中的类">SqlNodeList</a>&nbsp;selectList)</code>&nbsp;</td>
 </tr>
 <tr id="i28" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.html#setWhere-org.apache.calcite.sql.SqlNode-">setWhere</a></span>(<a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;whereClause)</code>&nbsp;</td>
 </tr>
 <tr id="i29" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSelect.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="i30" class="altColor">
 <td class="colFirst"><code>void</code></td>
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 <dt><span class="seeLabel">另请参阅:</span></dt>
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 <div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlCall.html#validate-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">SqlCall</a></code></span></div>
 <div class="block">Validates this call.

  <p>The default implementation delegates the validation to the operator's
  <a href="../../../../org/apache/calcite/sql/SqlOperator.html#validateCall-org.apache.calcite.sql.SqlCall-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.validate.SqlValidatorScope-"><code>SqlOperator.validateCall(org.apache.calcite.sql.SqlCall, org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.validate.SqlValidatorScope)</code></a>. Derived classes may override (as do,
  for example <a href="../../../../org/apache/calcite/sql/SqlSelect.html" title="org.apache.calcite.sql中的类"><code>SqlSelect</code></a> and <a href="../../../../org/apache/calcite/sql/SqlUpdate.html" title="org.apache.calcite.sql中的类"><code>SqlUpdate</code></a>).</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="../../../../org/apache/calcite/sql/SqlCall.html#validate-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">validate</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a></code></dd>
 <dd><code>scope</code> - Validator</dd>
 </dl>
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 <h4>unparse</h4>
 <pre>public&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"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlNode.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-">SqlNode</a></code></span></div>
 <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="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="../../../../org/apache/calcite/sql/SqlCall.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-">unparse</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlCall.html" title="org.apache.calcite.sql中的类">SqlCall</a></code></dd>
 <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>
 </dl>
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 <pre>public&nbsp;boolean&nbsp;hasWhere()</pre>
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 <pre>public&nbsp;boolean&nbsp;isKeywordPresent(<a href="../../../../org/apache/calcite/sql/SqlSelectKeyword.html" title="org.apache.calcite.sql中的枚举">SqlSelectKeyword</a>&nbsp;targetKeyWord)</pre>
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