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<div class="subTitle">org.apache.calcite.sql.type</div>
<h2 title="类 BasicSqlType" class="title">类 BasicSqlType</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><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">org.apache.calcite.rel.type.RelDataTypeImpl</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html" title="org.apache.calcite.sql.type中的类">org.apache.calcite.sql.type.AbstractSqlType</a></li>
<li>
<ul class="inheritance">
<li>org.apache.calcite.sql.type.BasicSqlType</li>
</ul>
</li>
</ul>
</li>
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</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/io/Serializable.html?is-external=true" title="java.io中的类或接口">Serializable</a>, <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>, <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFamily.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFamily</a></dd>
</dl>
<hr>
<br>
<pre>public class <span class="typeNameLabel">BasicSqlType</span>
extends <a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html" title="org.apache.calcite.sql.type中的类">AbstractSqlType</a></pre>
<div class="block">BasicSqlType represents a standard atomic SQL type (excluding interval
types).
<p>Instances of this class are immutable.</div>
<dl>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../../serialized-form.html#org.apache.calcite.sql.type.BasicSqlType">序列化表格</a></dd>
</dl>
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<h3>字段概要</h3>
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<h3>从类继承的字段&nbsp;org.apache.calcite.sql.type.<a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html" title="org.apache.calcite.sql.type中的类">AbstractSqlType</a></h3>
<code><a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#isNullable">isNullable</a>, <a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#typeName">typeName</a></code></li>
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<h3>从类继承的字段&nbsp;org.apache.calcite.rel.type.<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#digest">digest</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#fieldList">fieldList</a></code></li>
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<h3>从接口继承的字段&nbsp;org.apache.calcite.rel.type.<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#PRECISION_NOT_SPECIFIED">PRECISION_NOT_SPECIFIED</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#SCALE_NOT_SPECIFIED">SCALE_NOT_SPECIFIED</a></code></li>
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<h3>构造器概要</h3>
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<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/type/BasicSqlType.html#BasicSqlType-org.apache.calcite.rel.type.RelDataTypeSystem-org.apache.calcite.sql.type.SqlTypeName-">BasicSqlType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName)</code>
<div class="block">Constructs a type with no parameters.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#BasicSqlType-org.apache.calcite.rel.type.RelDataTypeSystem-org.apache.calcite.sql.type.SqlTypeName-int-">BasicSqlType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
int&nbsp;precision)</code>
<div class="block">Constructs a type with precision/length but no scale.</div>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#BasicSqlType-org.apache.calcite.rel.type.RelDataTypeSystem-org.apache.calcite.sql.type.SqlTypeName-int-int-">BasicSqlType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
int&nbsp;precision,
int&nbsp;scale)</code>
<div class="block">Constructs a type with precision/length and scale.</div>
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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="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>
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<td class="colFirst"><code>protected static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#checkPrecScale-org.apache.calcite.sql.type.SqlTypeName-boolean-boolean-">checkPrecScale</a></span>(<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
boolean&nbsp;precisionSpecified,
boolean&nbsp;scaleSpecified)</code>
<div class="block">Throws if <code>typeName</code> does not allow the given combination of
precision and scale.</div>
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</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#generateTypeString-java.lang.StringBuilder-boolean-">generateTypeString</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html?is-external=true" title="java.lang中的类或接口">StringBuilder</a>&nbsp;sb,
boolean&nbsp;withDetail)</code>
<div class="block">Generates a string representation of this type.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html?is-external=true" title="java.nio.charset中的类或接口">Charset</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#getCharset--">getCharset</a></span>()</code>
<div class="block">Gets this type's character set, or null if this type cannot carry a
character set or has no character set defined.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/SqlCollation.html" title="org.apache.calcite.sql中的类">SqlCollation</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#getCollation--">getCollation</a></span>()</code>
<div class="block">Gets this type's collation, or null if this type cannot carry a collation
or has no collation defined.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<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/type/BasicSqlType.html#getLimit-boolean-org.apache.calcite.sql.type.SqlTypeName.Limit-boolean-">getLimit</a></span>(boolean&nbsp;sign,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.Limit.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName.Limit</a>&nbsp;limit,
boolean&nbsp;beyond)</code>
<div class="block">Returns a value which is a limit for this type.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#getPrecision--">getPrecision</a></span>()</code>
<div class="block">Gets the JDBC-defined precision for values of this type.</div>
</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/BasicSqlType.html#getScale--">getScale</a></span>()</code>
<div class="block">Gets the scale of this type.</div>
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<code><a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#getFamily--">getFamily</a>, <a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#getPrecedenceList--">getPrecedenceList</a>, <a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#getSqlTypeName--">getSqlTypeName</a>, <a href="../../../../../org/apache/calcite/sql/type/AbstractSqlType.html#isNullable--">isNullable</a></code></li>
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<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#computeDigest--">computeDigest</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#extra-org.apache.calcite.rel.type.RelDataType-">extra</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getComparability--">getComparability</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getComponentType--">getComponentType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getField-java.lang.String-boolean-boolean-">getField</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getFieldCount--">getFieldCount</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getFieldList--">getFieldList</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getFieldNames--">getFieldNames</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getFullTypeString--">getFullTypeString</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getIntervalQualifier--">getIntervalQualifier</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getKeyType--">getKeyType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getSqlIdentifier--">getSqlIdentifier</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getStructKind--">getStructKind</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getValueType--">getValueType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#isDynamicStruct--">isDynamicStruct</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#isStruct--">isStruct</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#proto-org.apache.calcite.rel.type.RelDataType-">proto</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#proto-org.apache.calcite.sql.type.SqlTypeName-boolean-">proto</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#proto-org.apache.calcite.sql.type.SqlTypeName-int-boolean-">proto</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#proto-org.apache.calcite.sql.type.SqlTypeName-int-int-boolean-">proto</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#toString--">toString</a></code></li>
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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#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>BasicSqlType</h4>
<pre>public&nbsp;BasicSqlType(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName)</pre>
<div class="block">Constructs a type with no parameters. This should only be called from a
factory method.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>typeSystem</code> - Type system</dd>
<dd><code>typeName</code> - Type name</dd>
</dl>
</li>
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<h4>BasicSqlType</h4>
<pre>public&nbsp;BasicSqlType(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
int&nbsp;precision)</pre>
<div class="block">Constructs a type with precision/length but no scale.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>typeSystem</code> - Type system</dd>
<dd><code>typeName</code> - Type name</dd>
<dd><code>precision</code> - Precision (called length for some types)</dd>
</dl>
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<h4>BasicSqlType</h4>
<pre>public&nbsp;BasicSqlType(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
int&nbsp;precision,
int&nbsp;scale)</pre>
<div class="block">Constructs a type with precision/length and scale.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>typeSystem</code> - Type system</dd>
<dd><code>typeName</code> - Type name</dd>
<dd><code>precision</code> - Precision (called length for some types)</dd>
<dd><code>scale</code> - Scale</dd>
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<h3>方法详细资料</h3>
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<h4>checkPrecScale</h4>
<pre>protected static&nbsp;void&nbsp;checkPrecScale(<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName</a>&nbsp;typeName,
boolean&nbsp;precisionSpecified,
boolean&nbsp;scaleSpecified)</pre>
<div class="block">Throws if <code>typeName</code> does not allow the given combination of
precision and scale.</div>
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<h4>getPrecision</h4>
<pre>public&nbsp;int&nbsp;getPrecision()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getPrecision--">RelDataType</a></code></span></div>
<div class="block">Gets the JDBC-defined precision for values of this type. Note that this
is not always the same as the user-specified precision. For example, the
type INTEGER has no user-specified precision, but this method returns 10
for an INTEGER type.
<p>Returns <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#PRECISION_NOT_SPECIFIED"><code>RelDataType.PRECISION_NOT_SPECIFIED</code></a> (-1) if precision is not
applicable for this type.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getPrecision--">getPrecision</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getPrecision--">getPrecision</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>number of decimal digits for exact numeric types; number of
decimal digits in mantissa for approximate numeric types; number of
decimal digits for fractional seconds of datetime types; length in
characters for character types; length in bytes for binary types; length
in bits for bit types; 1 for BOOLEAN; -1 if precision is not valid for
this type</dd>
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<h4>getScale</h4>
<pre>public&nbsp;int&nbsp;getScale()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getScale--">RelDataType</a></code></span></div>
<div class="block">Gets the scale of this type. Returns <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#SCALE_NOT_SPECIFIED"><code>RelDataType.SCALE_NOT_SPECIFIED</code></a> (-1) if
scale is not valid for this type.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getScale--">getScale</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getScale--">getScale</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>number of digits of scale</dd>
</dl>
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<h4>getCharset</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html?is-external=true" title="java.nio.charset中的类或接口">Charset</a>&nbsp;getCharset()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getCharset--">RelDataType</a></code></span></div>
<div class="block">Gets this type's character set, or null if this type cannot carry a
character set or has no character set defined.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getCharset--">getCharset</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getCharset--">getCharset</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>charset of type</dd>
</dl>
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<h4>getCollation</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlCollation.html" title="org.apache.calcite.sql中的类">SqlCollation</a>&nbsp;getCollation()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getCollation--">RelDataType</a></code></span></div>
<div class="block">Gets this type's collation, or null if this type cannot carry a collation
or has no collation defined.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html#getCollation--">getCollation</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#getCollation--">getCollation</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>collation of type</dd>
</dl>
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<h4>generateTypeString</h4>
<pre>protected&nbsp;void&nbsp;generateTypeString(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html?is-external=true" title="java.lang中的类或接口">StringBuilder</a>&nbsp;sb,
boolean&nbsp;withDetail)</pre>
<div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#generateTypeString-java.lang.StringBuilder-boolean-">RelDataTypeImpl</a></code></span></div>
<div class="block">Generates a string representation of this type.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html#generateTypeString-java.lang.StringBuilder-boolean-">generateTypeString</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeImpl.html" title="org.apache.calcite.rel.type中的类">RelDataTypeImpl</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>sb</code> - StringBuilder into which to generate the string</dd>
<dd><code>withDetail</code> - when true, all detail information needed to compute a
unique digest (and return from getFullTypeString) should
be included;</dd>
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<h4>getLimit</h4>
<pre>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;getLimit(boolean&nbsp;sign,
<a href="../../../../../org/apache/calcite/sql/type/SqlTypeName.Limit.html" title="org.apache.calcite.sql.type中的枚举">SqlTypeName.Limit</a>&nbsp;limit,
boolean&nbsp;beyond)</pre>
<div class="block">Returns a value which is a limit for this type.
<p>For example,
<table border="1">
<caption>Limits</caption>
<tr>
<th>Datatype</th>
<th>sign</th>
<th>limit</th>
<th>beyond</th>
<th>precision</th>
<th>scale</th>
<th>Returns</th>
</tr>
<tr>
<td>Integer</td>
<td>true</td>
<td>true</td>
<td>false</td>
<td>-1</td>
<td>-1</td>
<td>2147483647 (2 ^ 31 -1 = MAXINT)</td>
</tr>
<tr>
<td>Integer</td>
<td>true</td>
<td>true</td>
<td>true</td>
<td>-1</td>
<td>-1</td>
<td>2147483648 (2 ^ 31 = MAXINT + 1)</td>
</tr>
<tr>
<td>Integer</td>
<td>false</td>
<td>true</td>
<td>false</td>
<td>-1</td>
<td>-1</td>
<td>-2147483648 (-2 ^ 31 = MININT)</td>
</tr>
<tr>
<td>Boolean</td>
<td>true</td>
<td>true</td>
<td>false</td>
<td>-1</td>
<td>-1</td>
<td>TRUE</td>
</tr>
<tr>
<td>Varchar</td>
<td>true</td>
<td>true</td>
<td>false</td>
<td>10</td>
<td>-1</td>
<td>'ZZZZZZZZZZ'</td>
</tr>
</table></div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>sign</code> - If true, returns upper limit, otherwise lower limit</dd>
<dd><code>limit</code> - If true, returns value at or near to overflow; otherwise
value at or near to underflow</dd>
<dd><code>beyond</code> - If true, returns the value just beyond the limit, otherwise
the value at the limit</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Limit value</dd>
</dl>
</li>
</ul>
</li>
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