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<div class="subTitle">org.apache.calcite.rel.type</div>
<h2 title="类 RelDataTypeFactoryImpl" class="title">类 RelDataTypeFactoryImpl</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.rel.type.RelDataTypeFactoryImpl</li>
</ul>
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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="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></dd>
</dl>
<dl>
<dt>直接已知子类:</dt>
<dd><a href="../../../../../org/apache/calcite/sql/type/SqlTypeFactoryImpl.html" title="org.apache.calcite.sql.type中的类">SqlTypeFactoryImpl</a></dd>
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<pre>public abstract class <span class="typeNameLabel">RelDataTypeFactoryImpl</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="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></pre>
<div class="block">Abstract base for implementations of <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口"><code>RelDataTypeFactory</code></a>.</div>
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<h3>嵌套类概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="嵌套类概要表, 列表嵌套类和解释">
<caption><span>嵌套类</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">类和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.JavaType.html" title="org.apache.calcite.rel.type中的类">RelDataTypeFactoryImpl.JavaType</a></span></code>
<div class="block">Type which is based upon a Java class.</div>
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<h3>从接口继承的嵌套类/接口&nbsp;org.apache.calcite.rel.type.<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.Builder.html" title="org.apache.calcite.rel.type中的类">RelDataTypeFactory.Builder</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfo.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory.FieldInfo</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfoBuilder.html" title="org.apache.calcite.rel.type中的类">RelDataTypeFactory.FieldInfoBuilder</a></code></li>
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<h3>字段概要</h3>
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<caption><span>字段</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">字段和说明</th>
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<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#typeSystem">typeSystem</a></span></code>&nbsp;</td>
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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>
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<th class="colFirst" scope="col">限定符</th>
<th class="colLast" scope="col">构造器和说明</th>
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<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#RelDataTypeFactoryImpl-org.apache.calcite.rel.type.RelDataTypeSystem-">RelDataTypeFactoryImpl</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)</code>
<div class="block">Creates a type factory.</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><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><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfoBuilder.html" title="org.apache.calcite.rel.type中的类">RelDataTypeFactory.FieldInfoBuilder</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#builder--">builder</a></span>()</code>
<div class="block">Creates a
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfoBuilder.html" title="org.apache.calcite.rel.type中的类"><code>RelDataTypeFactory.FieldInfoBuilder</code></a>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected <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/rel/type/RelDataTypeFactoryImpl.html#canonize-org.apache.calcite.rel.type.RelDataType-">canonize</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</code>
<div class="block">Registers a type, or returns the existing type if it is already
registered.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected <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/rel/type/RelDataTypeFactoryImpl.html#canonize-org.apache.calcite.rel.type.StructKind-java.util.List-java.util.List-">canonize</a></span>(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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="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>&gt;&nbsp;names,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected <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/rel/type/RelDataTypeFactoryImpl.html#canonize-org.apache.calcite.rel.type.StructKind-java.util.List-java.util.List-boolean-">canonize</a></span>(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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="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>&gt;&nbsp;names,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types,
boolean&nbsp;nullable)</code>
<div class="block">Looks up a type using a temporary key, and if not present, creates
a permanent key and type.</div>
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<tr id="i4" class="altColor">
<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/rel/type/RelDataTypeFactoryImpl.html#copyType-org.apache.calcite.rel.type.RelDataType-">copyType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</code>
<div class="block">Duplicates a type, making a deep copy.</div>
</td>
</tr>
<tr id="i5" 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/rel/type/RelDataTypeFactoryImpl.html#createDecimalProduct-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createDecimalProduct</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i6" class="altColor">
<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/rel/type/RelDataTypeFactoryImpl.html#createDecimalQuotient-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createDecimalQuotient</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i7" 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/rel/type/RelDataTypeFactoryImpl.html#createJavaType-java.lang.Class-">createJavaType</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&nbsp;clazz)</code>
<div class="block">Creates a type that corresponds to a Java class.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<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/rel/type/RelDataTypeFactoryImpl.html#createJoinType-org.apache.calcite.rel.type.RelDataType...-">createJoinType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>...&nbsp;types)</code>
<div class="block">Creates a cartesian product type.</div>
</td>
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<tr id="i9" 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/rel/type/RelDataTypeFactoryImpl.html#createStructType-java.util.List-">createStructType</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;? extends <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="java.util中的类或接口">Map.Entry</a>&lt;<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>,<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&gt;&nbsp;fieldList)</code>
<div class="block">Creates a type that represents a structured collection of fieldList,
obtaining the field information from a list of (name, type) pairs.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<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/rel/type/RelDataTypeFactoryImpl.html#createStructType-java.util.List-java.util.List-">createStructType</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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;typeList,
<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="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>&gt;&nbsp;fieldNameList)</code>
<div class="block">Creates a type that represents a structured collection of fields.</div>
</td>
</tr>
<tr id="i11" 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/rel/type/RelDataTypeFactoryImpl.html#createStructType-org.apache.calcite.rel.type.RelDataTypeFactory.FieldInfo-">createStructType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfo.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory.FieldInfo</a>&nbsp;fieldInfo)</code>
<div class="block">Creates a type that represents a structured collection of fields,
obtaining the field information via a callback.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<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/rel/type/RelDataTypeFactoryImpl.html#createStructType-org.apache.calcite.rel.type.StructKind-java.util.List-java.util.List-">createStructType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;typeList,
<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="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>&gt;&nbsp;fieldNameList)</code>
<div class="block">Creates a type that represents a structured collection of fields, given
lists of the names and types of the fields.</div>
</td>
</tr>
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<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/rel/type/RelDataTypeFactoryImpl.html#createTypeWithNullability-org.apache.calcite.rel.type.RelDataType-boolean-">createTypeWithNullability</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type,
boolean&nbsp;nullable)</code>
<div class="block">Creates a type that is the same as another type but with possibly
different nullability.</div>
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<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/rel/type/RelDataTypeFactoryImpl.html#decimalOf-org.apache.calcite.rel.type.RelDataType-">decimalOf</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</code>
<div class="block">Create a decimal type equivalent to the numeric <code>type</code>,
this is related to specific system implementation,
you can override this logic if it is required.</div>
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<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>
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<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#getTypeSystem--">getTypeSystem</a></span>()</code>
<div class="block">Returns the type system.</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#isJavaType-org.apache.calcite.rel.type.RelDataType-">isJavaType</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;t)</code>&nbsp;</td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#leastRestrictive-java.util.List-">leastRestrictive</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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</code>
<div class="block">Returns the most general of a set of types (that is, one type to which
they can all be cast), or null if conversion is not possible.</div>
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<td class="colFirst"><code>protected <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/rel/type/RelDataTypeFactoryImpl.html#leastRestrictiveStructuredType-java.util.List-">leastRestrictiveStructuredType</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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactoryImpl.html#useDoubleMultiplication-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">useDoubleMultiplication</a></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
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<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createArrayType-org.apache.calcite.rel.type.RelDataType-long-">createArrayType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createMapType-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createMapType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createMultisetType-org.apache.calcite.rel.type.RelDataType-long-">createMultisetType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createSqlIntervalType-org.apache.calcite.sql.SqlIntervalQualifier-">createSqlIntervalType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createSqlType-org.apache.calcite.sql.type.SqlTypeName-">createSqlType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createSqlType-org.apache.calcite.sql.type.SqlTypeName-int-">createSqlType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createSqlType-org.apache.calcite.sql.type.SqlTypeName-int-int-">createSqlType</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createTypeWithCharsetAndCollation-org.apache.calcite.rel.type.RelDataType-java.nio.charset.Charset-org.apache.calcite.sql.SqlCollation-">createTypeWithCharsetAndCollation</a>, <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createUnknownType--">createUnknownType</a></code></li>
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<pre>protected final&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a> typeSystem</pre>
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<pre>protected&nbsp;RelDataTypeFactoryImpl(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;typeSystem)</pre>
<div class="block">Creates a type factory.</div>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeSystem</a>&nbsp;getTypeSystem()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#getTypeSystem--">RelDataTypeFactory</a></code></span></div>
<div class="block">Returns the type system.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#getTypeSystem--">getTypeSystem</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Type system</dd>
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<h4>createJavaType</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;createJavaType(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&nbsp;clazz)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createJavaType-java.lang.Class-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that corresponds to a Java class.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createJavaType-java.lang.Class-">createJavaType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>clazz</code> - the Java class used to define the type</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical Java type descriptor</dd>
</dl>
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<h4>createJoinType</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;createJoinType(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>...&nbsp;types)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createJoinType-org.apache.calcite.rel.type.RelDataType...-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a cartesian product type.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createJoinType-org.apache.calcite.rel.type.RelDataType...-">createJoinType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>types</code> - array of types to be joined</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical join type descriptor</dd>
</dl>
</li>
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<h4>createStructType</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;createStructType(<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;typeList,
<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="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>&gt;&nbsp;fieldNameList)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-java.util.List-java.util.List-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that represents a structured collection of fields.
Shorthand for <code>createStructType(StructKind.FULLY_QUALIFIED, typeList,
fieldNameList)</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-java.util.List-java.util.List-">createStructType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
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<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;createStructType(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;typeList,
<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="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>&gt;&nbsp;fieldNameList)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-org.apache.calcite.rel.type.StructKind-java.util.List-java.util.List-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that represents a structured collection of fields, given
lists of the names and types of the fields.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-org.apache.calcite.rel.type.StructKind-java.util.List-java.util.List-">createStructType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>kind</code> - Name resolution policy</dd>
<dd><code>typeList</code> - types of the fields</dd>
<dd><code>fieldNameList</code> - names of the fields</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical struct type descriptor</dd>
</dl>
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<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;createStructType(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfo.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory.FieldInfo</a>&nbsp;fieldInfo)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-org.apache.calcite.rel.type.RelDataTypeFactory.FieldInfo-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that represents a structured collection of fields,
obtaining the field information via a callback.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-org.apache.calcite.rel.type.RelDataTypeFactory.FieldInfo-">createStructType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>fieldInfo</code> - callback for field information</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical struct type descriptor</dd>
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<pre>public final&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;createStructType(<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;? extends <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="java.util中的类或接口">Map.Entry</a>&lt;<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>,<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&gt;&nbsp;fieldList)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-java.util.List-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that represents a structured collection of fieldList,
obtaining the field information from a list of (name, type) pairs.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createStructType-java.util.List-">createStructType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>fieldList</code> - List of (name, type) pairs</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical struct type descriptor</dd>
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<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;leastRestrictive(<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</pre>
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<div class="block">Returns the most general of a set of types (that is, one type to which
they can all be cast), or null if conversion is not possible. The result
may be a new type that is less restrictive than any of the input types,
e.g. <code>leastRestrictive(INT, NUMERIC(3, 2))</code> could be
<code>NUMERIC(12, 2)</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#leastRestrictive-java.util.List-">leastRestrictive</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>types</code> - input types to be combined using union (not null, not empty)</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>canonical union type descriptor</dd>
</dl>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;leastRestrictiveStructuredType(<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</pre>
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<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;copyType(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#copyType-org.apache.calcite.rel.type.RelDataType-">RelDataTypeFactory</a></code></span></div>
<div class="block">Duplicates a type, making a deep copy. Normally, this is a no-op, since
canonical type objects are returned. However, it is useful when copying a
type from one factory to another.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#copyType-org.apache.calcite.rel.type.RelDataType-">copyType</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>type</code> - input type</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>output type, a new object equivalent to input type</dd>
</dl>
</li>
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<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;createTypeWithNullability(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type,
boolean&nbsp;nullable)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createTypeWithNullability-org.apache.calcite.rel.type.RelDataType-boolean-">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a type that is the same as another type but with possibly
different nullability. The output type may be identical to the input
type. For type systems without a concept of nullability, the return value
is always the same as the input.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createTypeWithNullability-org.apache.calcite.rel.type.RelDataType-boolean-">createTypeWithNullability</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>type</code> - input type</dd>
<dd><code>nullable</code> - true to request a nullable type; false to request a NOT
NULL type</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>output type, same as input type except with specified nullability</dd>
</dl>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;canonize(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</pre>
<div class="block">Registers a type, or returns the existing type if it is already
registered.</div>
<dl>
<dt><span class="throwsLabel">抛出:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="java.lang中的类或接口">NullPointerException</a></code> - if type is null</dd>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;canonize(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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="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>&gt;&nbsp;names,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types,
boolean&nbsp;nullable)</pre>
<div class="block">Looks up a type using a temporary key, and if not present, creates
a permanent key and type.
<p>This approach allows us to use a cheap temporary key. A permanent
key is more expensive, because it must be immutable and not hold
references into other data structures.</p></div>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;canonize(<a href="../../../../../org/apache/calcite/rel/type/StructKind.html" title="org.apache.calcite.rel.type中的枚举">StructKind</a>&nbsp;kind,
<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="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>&gt;&nbsp;names,
<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/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&gt;&nbsp;types)</pre>
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<pre>public static&nbsp;boolean&nbsp;isJavaType(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;t)</pre>
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<h4>createDecimalProduct</h4>
<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="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;createDecimalProduct(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
<div class="block">Delegates to
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html#deriveDecimalMultiplyType-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"><code>RelDataTypeSystem.deriveDecimalMultiplyType(RelDataTypeFactory, RelDataType, RelDataType)</code></a>
to get the return type for the operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createDecimalProduct-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createDecimalProduct</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>type1</code> - type of the first operand</dd>
<dd><code>type2</code> - type of the second operand</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>the result type for a decimal multiplication, or null if decimal
multiplication should not be applied to the operands.</dd>
</dl>
</li>
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<h4>useDoubleMultiplication</h4>
<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;boolean&nbsp;useDoubleMultiplication(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
<div class="block">Delegates to
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html#shouldUseDoubleMultiplication-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"><code>RelDataTypeSystem.shouldUseDoubleMultiplication(RelDataTypeFactory, RelDataType, RelDataType)</code></a>
to get if double should be used for multiplication.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#useDoubleMultiplication-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">useDoubleMultiplication</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
</dl>
</li>
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<h4>createDecimalQuotient</h4>
<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="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;createDecimalQuotient(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type1,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type2)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
<div class="block">Delegates to
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeSystem.html#deriveDecimalDivideType-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"><code>RelDataTypeSystem.deriveDecimalDivideType(RelDataTypeFactory, RelDataType, RelDataType)</code></a>
to get the return type for the operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#createDecimalQuotient-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">createDecimalQuotient</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>type1</code> - type of the first operand</dd>
<dd><code>type2</code> - type of the second operand</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>the result type for a decimal division, or null if decimal
division should not be applied to the operands.</dd>
</dl>
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<h4>decimalOf</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;decimalOf(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;type)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#decimalOf-org.apache.calcite.rel.type.RelDataType-">RelDataTypeFactory</a></code></span></div>
<div class="block">Create a decimal type equivalent to the numeric <code>type</code>,
this is related to specific system implementation,
you can override this logic if it is required.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#decimalOf-org.apache.calcite.rel.type.RelDataType-">decimalOf</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>type</code> - the numeric type to create decimal type with</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>decimal equivalence of the numeric type.</dd>
</dl>
</li>
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<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;getDefaultCharset()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#getDefaultCharset--">getDefaultCharset</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>the default <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"><code>Charset</code></a> for string types</dd>
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<h4>builder</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfoBuilder.html" title="org.apache.calcite.rel.type中的类">RelDataTypeFactory.FieldInfoBuilder</a>&nbsp;builder()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#builder--">RelDataTypeFactory</a></code></span></div>
<div class="block">Creates a
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.FieldInfoBuilder.html" title="org.apache.calcite.rel.type中的类"><code>RelDataTypeFactory.FieldInfoBuilder</code></a>.
But since <code>FieldInfoBuilder</code> is deprecated, we recommend that you use
its base class <a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.Builder.html" title="org.apache.calcite.rel.type中的类"><code>RelDataTypeFactory.Builder</code></a>, which is not deprecated.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html#builder--">builder</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a></code></dd>
</dl>
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