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<div class="subTitle">org.apache.calcite.sql.type</div>
<h2 title="Class LiteralOperandTypeChecker" class="title">Class LiteralOperandTypeChecker</h2>
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<ul class="inheritance">
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<li>org.apache.calcite.sql.type.LiteralOperandTypeChecker</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a>, <a href="../../../../../org/apache/calcite/sql/type/SqlSingleOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlSingleOperandTypeChecker</a></dd>
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<pre>public class <span class="typeNameLabel">LiteralOperandTypeChecker</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../org/apache/calcite/sql/type/SqlSingleOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlSingleOperandTypeChecker</a></pre>
<div class="block">Parameter type-checking strategy type must be a literal (whether null is
allowed is determined by the constructor). <code>CAST(NULL as ...)</code> is
considered to be a NULL literal but not <code>CAST(CAST(NULL as ...) AS
...)</code></div>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.calcite.sql.type.<a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></h3>
<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.Consistency.html" title="enum in org.apache.calcite.sql.type">SqlOperandTypeChecker.Consistency</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#LiteralOperandTypeChecker-boolean-">LiteralOperandTypeChecker</a></span>(boolean&nbsp;allowNull)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">checkOperandTypes</a></span>(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a>&nbsp;callBinding,
boolean&nbsp;throwOnFailure)</code>
<div class="block">Checks the types of all operands to an operator call.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#checkSingleOperandType-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.sql.SqlNode-int-boolean-">checkSingleOperandType</a></span>(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a>&nbsp;callBinding,
<a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>&nbsp;node,
int&nbsp;iFormalOperand,
boolean&nbsp;throwOnFailure)</code>
<div class="block">Checks the type of a single operand against a particular ordinal position
within a formal operator signature.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#getAllowedSignatures-org.apache.calcite.sql.SqlOperator-java.lang.String-">getAllowedSignatures</a></span>(<a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a>&nbsp;op,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;opName)</code>
<div class="block">Returns a string describing the allowed formal signatures of a call, e.g.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.Consistency.html" title="enum in org.apache.calcite.sql.type">SqlOperandTypeChecker.Consistency</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#getConsistency--">getConsistency</a></span>()</code>
<div class="block">Returns the strategy for making the arguments have consistency types.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/sql/SqlOperandCountRange.html" title="interface in org.apache.calcite.sql">SqlOperandCountRange</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/type/LiteralOperandTypeChecker.html#getOperandCountRange--">getOperandCountRange</a></span>()</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/sql/type/LiteralOperandTypeChecker.html#isOptional-int-">isOptional</a></span>(int&nbsp;i)</code>
<div class="block">Returns whether the <code>i</code>th operand is optional.</div>
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<h4>LiteralOperandTypeChecker</h4>
<pre>public&nbsp;LiteralOperandTypeChecker(boolean&nbsp;allowNull)</pre>
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<h4>isOptional</h4>
<pre>public&nbsp;boolean&nbsp;isOptional(int&nbsp;i)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#isOptional-int-">SqlOperandTypeChecker</a></code></span></div>
<div class="block">Returns whether the <code>i</code>th operand is optional.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#isOptional-int-">isOptional</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></dd>
</dl>
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<h4>checkSingleOperandType</h4>
<pre>public&nbsp;boolean&nbsp;checkSingleOperandType(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a>&nbsp;callBinding,
<a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>&nbsp;node,
int&nbsp;iFormalOperand,
boolean&nbsp;throwOnFailure)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlSingleOperandTypeChecker.html#checkSingleOperandType-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.sql.SqlNode-int-boolean-">SqlSingleOperandTypeChecker</a></code></span></div>
<div class="block">Checks the type of a single operand against a particular ordinal position
within a formal operator signature. Note that the actual ordinal position
of the operand being checked may be <em>different</em> from the position
of the formal operand.
<p>For example, when validating the actual call
<blockquote>
<pre>C(X, Y, Z)</pre>
</blockquote>
<p>the strategy for validating the operand Z might involve checking its
type against the formal signature OP(W). In this case,
<code>iFormalOperand</code> would be zero, even though the position of Z
within call C is two.
<p>Caution that we could not(shouldn't) implement implicit type coercion for this checker,
implicit type coercion has side effect(modify the AST), if this single operand checker is
subsumed in a composite rule(OR or AND), we can not make any side effect if we
can not make sure that all the single operands type check are passed(with type coercion).
But there is an exception: only if the call has just one operand, for this case,
use <a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-"><code>SqlOperandTypeChecker.checkOperandTypes(org.apache.calcite.sql.SqlCallBinding, boolean)</code></a> instead.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlSingleOperandTypeChecker.html#checkSingleOperandType-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.sql.SqlNode-int-boolean-">checkSingleOperandType</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlSingleOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlSingleOperandTypeChecker</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>callBinding</code> - description of the call being checked; this is only
provided for context when throwing an exception; the
implementation should <em>NOT</em> examine the
operands of the call as part of the check</dd>
<dd><code>node</code> - the actual operand to be checked</dd>
<dd><code>iFormalOperand</code> - the 0-based formal operand ordinal</dd>
<dd><code>throwOnFailure</code> - whether to throw an exception if check fails
(otherwise returns false in that case)</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>whether check succeeded</dd>
</dl>
</li>
</ul>
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<h4>checkOperandTypes</h4>
<pre>public&nbsp;boolean&nbsp;checkOperandTypes(<a href="../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a>&nbsp;callBinding,
boolean&nbsp;throwOnFailure)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">SqlOperandTypeChecker</a></code></span></div>
<div class="block">Checks the types of all operands to an operator call.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#checkOperandTypes-org.apache.calcite.sql.SqlCallBinding-boolean-">checkOperandTypes</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>callBinding</code> - description of the call to be checked</dd>
<dd><code>throwOnFailure</code> - whether to throw an exception if check fails
(otherwise returns false in that case)</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>whether check succeeded</dd>
</dl>
</li>
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<h4>getOperandCountRange</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlOperandCountRange.html" title="interface in org.apache.calcite.sql">SqlOperandCountRange</a>&nbsp;getOperandCountRange()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#getOperandCountRange--">getOperandCountRange</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>range of operand counts allowed in a call</dd>
</dl>
</li>
</ul>
<a name="getAllowedSignatures-org.apache.calcite.sql.SqlOperator-java.lang.String-">
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<h4>getAllowedSignatures</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getAllowedSignatures(<a href="../../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a>&nbsp;op,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;opName)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#getAllowedSignatures-org.apache.calcite.sql.SqlOperator-java.lang.String-">SqlOperandTypeChecker</a></code></span></div>
<div class="block">Returns a string describing the allowed formal signatures of a call, e.g.
"SUBSTR(VARCHAR, INTEGER, INTEGER)".</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#getAllowedSignatures-org.apache.calcite.sql.SqlOperator-java.lang.String-">getAllowedSignatures</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>op</code> - the operator being checked</dd>
<dd><code>opName</code> - name to use for the operator in case of aliasing</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>generated string</dd>
</dl>
</li>
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<h4>getConsistency</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.Consistency.html" title="enum in org.apache.calcite.sql.type">SqlOperandTypeChecker.Consistency</a>&nbsp;getConsistency()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#getConsistency--">SqlOperandTypeChecker</a></code></span></div>
<div class="block">Returns the strategy for making the arguments have consistency types.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html#getConsistency--">getConsistency</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/calcite/sql/type/SqlOperandTypeChecker.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeChecker</a></code></dd>
</dl>
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