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<li>概要:&nbsp;</li>
<li><a href="#nested.classes.inherited.from.class.org.apache.calcite.sql.SqlLiteral">嵌套</a>&nbsp;|&nbsp;</li>
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<div class="subTitle">org.apache.calcite.sql</div>
<h2 title="类 SqlNumericLiteral" class="title">类 SqlNumericLiteral</h2>
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<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><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/SqlLiteral.html" title="org.apache.calcite.sql中的类">org.apache.calcite.sql.SqlLiteral</a></li>
<li>
<ul class="inheritance">
<li>org.apache.calcite.sql.SqlNumericLiteral</li>
</ul>
</li>
</ul>
</li>
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<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>
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<br>
<pre>public class <span class="typeNameLabel">SqlNumericLiteral</span>
extends <a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></pre>
<div class="block">A numeric SQL literal.</div>
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<h3>嵌套类概要</h3>
<ul class="blockList">
<li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.calcite.sql.SqlLiteral">
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</a>
<h3>从类继承的嵌套类/接口&nbsp;org.apache.calcite.sql.<a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></h3>
<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.SqlSymbol.html" title="org.apache.calcite.sql中的接口">SqlLiteral.SqlSymbol</a></code></li>
</ul>
</li>
</ul>
<!-- =========== FIELD SUMMARY =========== -->
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<h3>字段概要</h3>
<ul class="blockList">
<li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.sql.SqlLiteral">
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<h3>从类继承的字段&nbsp;org.apache.calcite.sql.<a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></h3>
<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#value">value</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.sql.SqlNode">
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</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>
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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="colFirst" scope="col">限定符</th>
<th class="colLast" scope="col">构造器和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#SqlNumericLiteral-java.math.BigDecimal-java.lang.Integer-java.lang.Integer-boolean-org.apache.calcite.sql.parser.SqlParserPos-">SqlNumericLiteral</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;value,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;prec,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;scale,
boolean&nbsp;isExact,
<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos)</code>&nbsp;</td>
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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="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/SqlNumericLiteral.html" title="org.apache.calcite.sql中的类">SqlNumericLiteral</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.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="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#createSqlType-org.apache.calcite.rel.type.RelDataTypeFactory-">createSqlType</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#getPrec--">getPrec</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#getScale--">getScale</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#isExact--">isExact</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html#isInteger--">isInteger</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<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/SqlNumericLiteral.html#toValue--">toValue</a></span>()</code>
<div class="block">For calc program builder - value may be different than <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-"><code>SqlLiteral.unparse(org.apache.calcite.sql.SqlWriter, int, int)</code></a>
Typical values:
Hello, world!</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.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>
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<h3>从类继承的方法&nbsp;org.apache.calcite.sql.<a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></h3>
<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#accept-org.apache.calcite.sql.util.SqlVisitor-">accept</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#bigDecimalValue--">bigDecimalValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#booleanValue--">booleanValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createApproxNumeric-java.lang.String-org.apache.calcite.sql.parser.SqlParserPos-">createApproxNumeric</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createBinaryString-byte:A-org.apache.calcite.sql.parser.SqlParserPos-">createBinaryString</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createBinaryString-java.lang.String-org.apache.calcite.sql.parser.SqlParserPos-">createBinaryString</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createBoolean-boolean-org.apache.calcite.sql.parser.SqlParserPos-">createBoolean</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createCharString-java.lang.String-org.apache.calcite.sql.parser.SqlParserPos-">createCharString</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createCharString-java.lang.String-java.lang.String-org.apache.calcite.sql.parser.SqlParserPos-">createCharString</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createDate-java.util.Calendar-org.apache.calcite.sql.parser.SqlParserPos-">createDate</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createDate-org.apache.calcite.util.DateString-org.apache.calcite.sql.parser.SqlParserPos-">createDate</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createExactNumeric-java.lang.String-org.apache.calcite.sql.parser.SqlParserPos-">createExactNumeric</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createInterval-int-java.lang.String-org.apache.calcite.sql.SqlIntervalQualifier-org.apache.calcite.sql.parser.SqlParserPos-">createInterval</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createNegative-org.apache.calcite.sql.SqlNumericLiteral-org.apache.calcite.sql.parser.SqlParserPos-">createNegative</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createNull-org.apache.calcite.sql.parser.SqlParserPos-">createNull</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createSample-org.apache.calcite.sql.SqlSampleSpec-org.apache.calcite.sql.parser.SqlParserPos-">createSample</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createSymbol-java.lang.Enum-org.apache.calcite.sql.parser.SqlParserPos-">createSymbol</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createTime-java.util.Calendar-int-org.apache.calcite.sql.parser.SqlParserPos-">createTime</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createTime-org.apache.calcite.util.TimeString-int-org.apache.calcite.sql.parser.SqlParserPos-">createTime</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createTimestamp-java.util.Calendar-int-org.apache.calcite.sql.parser.SqlParserPos-">createTimestamp</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createTimestamp-org.apache.calcite.util.TimestampString-int-org.apache.calcite.sql.parser.SqlParserPos-">createTimestamp</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createUnknown-org.apache.calcite.sql.parser.SqlParserPos-">createUnknown</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#equals-java.lang.Object-">equals</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#equalsDeep-org.apache.calcite.sql.SqlNode-org.apache.calcite.util.Litmus-">equalsDeep</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getKind--">getKind</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getMonotonicity-org.apache.calcite.sql.validate.SqlValidatorScope-">getMonotonicity</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getStringValue--">getStringValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getTypeName--">getTypeName</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getValue--">getValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#getValueAs-java.lang.Class-">getValueAs</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#hashCode--">hashCode</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#intValue-boolean-">intValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#longValue-boolean-">longValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#sampleValue-org.apache.calcite.sql.SqlNode-">sampleValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#signum--">signum</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#stringValue-org.apache.calcite.sql.SqlNode-">stringValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#symbolValue_--">symbolValue_</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#symbolValue-java.lang.Class-">symbolValue</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#unchain-org.apache.calcite.sql.SqlNode-">unchain</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#unescapeUnicode-char-">unescapeUnicode</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#validate-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">validate</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#value-org.apache.calcite.sql.SqlNode-">value</a>, <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#valueMatchesType-java.lang.Object-org.apache.calcite.sql.type.SqlTypeName-">valueMatchesType</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.sql.SqlNode">
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<h3>从类继承的方法&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#clone--">clone</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-E-">clone</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#cloneArray-org.apache.calcite.sql.SqlNode:A-">cloneArray</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#equalDeep-java.util.List-java.util.List-org.apache.calcite.util.Litmus-">equalDeep</a>, <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>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#equalsDeep-org.apache.calcite.sql.SqlNode-boolean-">equalsDeep</a>, <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>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#getParserPosition--">getParserPosition</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#isA-java.util.Set-">isA</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-org.apache.calcite.sql.SqlDialect-">toSqlString</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-org.apache.calcite.sql.SqlDialect-boolean-">toSqlString</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#toSqlString-java.util.function.UnaryOperator-">toSqlString</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#toString--">toString</a>, <a href="../../../../org/apache/calcite/sql/SqlNode.html#validateExpr-org.apache.calcite.sql.validate.SqlValidator-org.apache.calcite.sql.validate.SqlValidatorScope-">validateExpr</a></code></li>
</ul>
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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#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#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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<h3>构造器详细资料</h3>
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<h4>SqlNumericLiteral</h4>
<pre>protected&nbsp;SqlNumericLiteral(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;value,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;prec,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;scale,
boolean&nbsp;isExact,
<a href="../../../../org/apache/calcite/sql/parser/SqlParserPos.html" title="org.apache.calcite.sql.parser中的类">SqlParserPos</a>&nbsp;pos)</pre>
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<h3>方法详细资料</h3>
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<h4>getPrec</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;getPrec()</pre>
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<h4>getScale</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&nbsp;getScale()</pre>
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<h4>isExact</h4>
<pre>public&nbsp;boolean&nbsp;isExact()</pre>
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<h4>clone</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/sql/SqlNumericLiteral.html" title="org.apache.calcite.sql中的类">SqlNumericLiteral</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"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlNode.html#clone-org.apache.calcite.sql.parser.SqlParserPos-">SqlNode</a></code></span></div>
<div class="block">Clones a SqlNode with a different position.</div>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#clone-org.apache.calcite.sql.parser.SqlParserPos-">clone</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></code></dd>
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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/SqlLiteral.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-">unparse</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</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>
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<h4>toValue</h4>
<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;toValue()</pre>
<div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#toValue--">SqlLiteral</a></code></span></div>
<div class="block">For calc program builder - value may be different than <a href="../../../../org/apache/calcite/sql/SqlLiteral.html#unparse-org.apache.calcite.sql.SqlWriter-int-int-"><code>SqlLiteral.unparse(org.apache.calcite.sql.SqlWriter, int, int)</code></a>
Typical values:
<ul>
<li>Hello, world!</li>
<li>12.34</li>
<li>{null}</li>
<li>1969-04-29</li>
</ul></div>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#toValue--">toValue</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>string representation of the value</dd>
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<h4>createSqlType</h4>
<pre>public&nbsp;<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;createSqlType(<a href="../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html#createSqlType-org.apache.calcite.rel.type.RelDataTypeFactory-">createSqlType</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../org/apache/calcite/sql/SqlLiteral.html" title="org.apache.calcite.sql中的类">SqlLiteral</a></code></dd>
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<h4>isInteger</h4>
<pre>public&nbsp;boolean&nbsp;isInteger()</pre>
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