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| <div class="subTitle">org.apache.calcite.sql.type</div> |
| <h2 title="类 InferTypes" class="title">类 InferTypes</h2> |
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| <li>org.apache.calcite.sql.type.InferTypes</li> |
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| <pre>public abstract class <span class="typeNameLabel">InferTypes</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></pre> |
| <div class="block">Strategies for inferring operand types.</div> |
| <dl> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口"><code>SqlOperandTypeInference</code></a>, |
| <a href="../../../../../org/apache/calcite/sql/type/ReturnTypes.html" title="org.apache.calcite.sql.type中的类"><code>ReturnTypes</code></a></dd> |
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| <h3>字段概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释"> |
| <caption><span>字段</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">字段和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#ANY_NULLABLE">ANY_NULLABLE</a></span></code> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be nullable ANY.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#BOOLEAN">BOOLEAN</a></span></code> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be boolean.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#FIRST_KNOWN">FIRST_KNOWN</a></span></code> |
| <div class="block">Operand type-inference strategy where an unknown operand type is derived |
| from the first operand with a known type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#RETURN_TYPE">RETURN_TYPE</a></span></code> |
| <div class="block">Operand type-inference strategy where an unknown operand type is derived |
| from the call's return type.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#VARCHAR_1024">VARCHAR_1024</a></span></code> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be VARCHAR(1024).</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <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"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </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>static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/InferTypes.html#explicit-java.util.List-">explicit</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><<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>> types)</code> |
| <div class="block">Returns an <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口"><code>SqlOperandTypeInference</code></a> that returns a given list of |
| types.</div> |
| </td> |
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| </table> |
| <ul class="blockList"> |
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| <h3>从类继承的方法 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> |
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| <h3>字段详细资料</h3> |
| <a name="FIRST_KNOWN"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>FIRST_KNOWN</h4> |
| <pre>public static final <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> FIRST_KNOWN</pre> |
| <div class="block">Operand type-inference strategy where an unknown operand type is derived |
| from the first operand with a known type.</div> |
| </li> |
| </ul> |
| <a name="RETURN_TYPE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>RETURN_TYPE</h4> |
| <pre>public static final <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> RETURN_TYPE</pre> |
| <div class="block">Operand type-inference strategy where an unknown operand type is derived |
| from the call's return type. If the return type is a record, it must have |
| the same number of fields as the number of operands.</div> |
| </li> |
| </ul> |
| <a name="BOOLEAN"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>BOOLEAN</h4> |
| <pre>public static final <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> BOOLEAN</pre> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be boolean.</div> |
| </li> |
| </ul> |
| <a name="VARCHAR_1024"> |
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| <ul class="blockList"> |
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| <h4>VARCHAR_1024</h4> |
| <pre>public static final <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> VARCHAR_1024</pre> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be VARCHAR(1024). This is not something which should be used in most |
| cases (especially since the precision is arbitrary), but for IS [NOT] |
| NULL, we don't really care about the type at all, so it's reasonable to |
| use something that every other type can be cast to.</div> |
| </li> |
| </ul> |
| <a name="ANY_NULLABLE"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ANY_NULLABLE</h4> |
| <pre>public static final <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> ANY_NULLABLE</pre> |
| <div class="block">Operand type-inference strategy where an unknown operand type is assumed |
| to be nullable ANY.</div> |
| </li> |
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| <h4>explicit</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口">SqlOperandTypeInference</a> explicit(<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><<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>> types)</pre> |
| <div class="block">Returns an <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeInference.html" title="org.apache.calcite.sql.type中的接口"><code>SqlOperandTypeInference</code></a> that returns a given list of |
| types.</div> |
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