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<title>SqlNullTreatmentOperator (Apache Calcite API)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.sql</a></div>
<h1 title="Class SqlNullTreatmentOperator" class="title">Class SqlNullTreatmentOperator</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance"><a href="SqlOperator.html" title="class in org.apache.calcite.sql">org.apache.calcite.sql.SqlOperator</a>
<div class="inheritance"><a href="SqlSpecialOperator.html" title="class in org.apache.calcite.sql">org.apache.calcite.sql.SqlSpecialOperator</a>
<div class="inheritance">org.apache.calcite.sql.SqlNullTreatmentOperator</div>
</div>
</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">SqlNullTreatmentOperator</span>
<span class="extends-implements">extends <a href="SqlSpecialOperator.html" title="class in org.apache.calcite.sql">SqlSpecialOperator</a></span></div>
<div class="block">An operator that decides how to handle null input
(<code>RESPECT NULLS</code> and <code>IGNORE NULLS</code>).
<p>Currently, only the windowed aggregate functions <code>FIRST_VALUE</code>,
<code>LAST_VALUE</code>, <code>LEAD</code> and <code>LAG</code> support it.</div>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list-long">
<li><a href="SqlAggFunction.html#allowsNullTreatment()"><code>SqlAggFunction.allowsNullTreatment()</code></a></li>
</ul>
</dd>
</dl>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== NESTED CLASS SUMMARY ======== -->
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<section class="nested-class-summary" id="nested-class-summary">
<h2>Nested Class Summary</h2>
<div class="inherited-list">
<h2 id="nested-classes-inherited-from-class-org.apache.calcite.sql.SqlSpecialOperator">Nested classes/interfaces inherited from class&nbsp;org.apache.calcite.sql.<a href="SqlSpecialOperator.html" title="class in org.apache.calcite.sql">SqlSpecialOperator</a></h2>
<code><a href="SqlSpecialOperator.ReduceResult.html" title="class in org.apache.calcite.sql">SqlSpecialOperator.ReduceResult</a>, <a href="SqlSpecialOperator.TokenSequence.html" title="interface in org.apache.calcite.sql">SqlSpecialOperator.TokenSequence</a></code></div>
</section>
</li>
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="inherited-list">
<h3 id="fields-inherited-from-class-org.apache.calcite.sql.SqlOperator">Fields inherited from class&nbsp;org.apache.calcite.sql.<a href="SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a></h3>
<code><a href="SqlOperator.html#kind">kind</a>, <a href="SqlOperator.html#MDX_PRECEDENCE">MDX_PRECEDENCE</a>, <a href="SqlOperator.html#NL">NL</a></code></div>
</section>
</li>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor-summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.calcite.sql.SqlKind)" class="member-name-link">SqlNullTreatmentOperator</a><wbr>(<a href="SqlKind.html" title="enum in org.apache.calcite.sql">SqlKind</a>&nbsp;kind)</code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
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<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNode...)" class="member-name-link">createCall</a><wbr>(@Nullable <a href="SqlLiteral.html" title="class in org.apache.calcite.sql">SqlLiteral</a>&nbsp;functionQualifier,
<a href="parser/SqlParserPos.html" title="class in org.apache.calcite.sql.parser">SqlParserPos</a>&nbsp;pos,
@Nullable <a href="SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>...&nbsp;operands)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Creates a call to this operator with an array of operands.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#unparse(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlCall,int,int)" class="member-name-link">unparse</a><wbr>(<a href="SqlWriter.html" title="interface in org.apache.calcite.sql">SqlWriter</a>&nbsp;writer,
<a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a>&nbsp;call,
int&nbsp;leftPrec,
int&nbsp;rightPrec)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Writes a SQL representation of a call to this operator to a writer,
including parentheses if the operators on either side are of greater
precedence.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#validateCall(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.validate.SqlValidatorScope)" class="member-name-link">validateCall</a><wbr>(<a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a>&nbsp;call,
<a href="validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a>&nbsp;validator,
<a href="validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a>&nbsp;scope,
<a href="validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a>&nbsp;operandScope)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Validates a call to this operator.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.calcite.sql.SqlSpecialOperator">Methods inherited from class&nbsp;org.apache.calcite.sql.<a href="SqlSpecialOperator.html" title="class in org.apache.calcite.sql">SqlSpecialOperator</a></h3>
<code><a href="SqlSpecialOperator.html#getSyntax()">getSyntax</a>, <a href="SqlSpecialOperator.html#reduceExpr(int,org.apache.calcite.sql.SqlSpecialOperator.TokenSequence)">reduceExpr</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.calcite.sql.SqlOperator">Methods inherited from class&nbsp;org.apache.calcite.sql.<a href="SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a></h3>
<code><a href="SqlOperator.html#acceptCall(org.apache.calcite.sql.util.SqlVisitor,org.apache.calcite.sql.SqlCall)">acceptCall</a>, <a href="SqlOperator.html#acceptCall(org.apache.calcite.sql.util.SqlVisitor,org.apache.calcite.sql.SqlCall,boolean,org.apache.calcite.sql.util.SqlBasicVisitor.ArgHandler)">acceptCall</a>, <a href="SqlOperator.html#adjustType(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.SqlCall,org.apache.calcite.rel.type.RelDataType)">adjustType</a>, <a href="SqlOperator.html#allowsFraming()">allowsFraming</a>, <a href="SqlOperator.html#argumentMustBeScalar(int)">argumentMustBeScalar</a>, <a href="SqlOperator.html#checkOperandCount(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.type.SqlOperandTypeChecker,org.apache.calcite.sql.SqlCall)">checkOperandCount</a>, <a href="SqlOperator.html#checkOperandTypes(org.apache.calcite.sql.SqlCallBinding,boolean)">checkOperandTypes</a>, <a href="SqlOperator.html#constructArgNameList(org.apache.calcite.sql.SqlCall)">constructArgNameList</a>, <a href="SqlOperator.html#constructArgTypeList(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,java.util.List,boolean)">constructArgTypeList</a>, <a href="SqlOperator.html#constructOperandList(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.SqlCall,java.util.List)">constructOperandList</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,java.lang.Iterable)">createCall</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNodeList)">createCall</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNode...)">createCall</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.parser.SqlParserPos,java.util.List)">createCall</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNodeList)">createCall</a>, <a href="SqlOperator.html#createCall(org.apache.calcite.sql.SqlNodeList)">createCall</a>, <a href="SqlOperator.html#deriveOperandType(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,int,org.apache.calcite.sql.SqlNode)">deriveOperandType</a>, <a href="SqlOperator.html#deriveType(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall)">deriveType</a>, <a href="SqlOperator.html#equals(java.lang.Object)">equals</a>, <a href="SqlOperator.html#getAllowedSignatures()">getAllowedSignatures</a>, <a href="SqlOperator.html#getAllowedSignatures(java.lang.String)">getAllowedSignatures</a>, <a href="SqlOperator.html#getKind()">getKind</a>, <a href="SqlOperator.html#getLeftPrec()">getLeftPrec</a>, <a href="SqlOperator.html#getMonotonicity(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.validate.SqlValidatorScope)">getMonotonicity</a>, <a href="SqlOperator.html#getMonotonicity(org.apache.calcite.sql.SqlOperatorBinding)">getMonotonicity</a>, <a href="SqlOperator.html#getName()">getName</a>, <a href="SqlOperator.html#getNameAsId()">getNameAsId</a>, <a href="SqlOperator.html#getOperandCountRange()">getOperandCountRange</a>, <a href="SqlOperator.html#getOperandTypeChecker()">getOperandTypeChecker</a>, <a href="SqlOperator.html#getOperandTypeInference()">getOperandTypeInference</a>, <a href="SqlOperator.html#getReturnTypeInference()">getReturnTypeInference</a>, <a href="SqlOperator.html#getRightPrec()">getRightPrec</a>, <a href="SqlOperator.html#getSignatureTemplate(int)">getSignatureTemplate</a>, <a href="SqlOperator.html#getStrongPolicyInference()">getStrongPolicyInference</a>, <a href="SqlOperator.html#hashCode()">hashCode</a>, <a href="SqlOperator.html#inferReturnType(org.apache.calcite.rel.type.RelDataTypeFactory,java.util.List)">inferReturnType</a>, <a href="SqlOperator.html#inferReturnType(org.apache.calcite.sql.SqlOperatorBinding)">inferReturnType</a>, <a href="SqlOperator.html#isAggregator()">isAggregator</a>, <a href="SqlOperator.html#isDeterministic()">isDeterministic</a>, <a href="SqlOperator.html#isDynamicFunction()">isDynamicFunction</a>, <a href="SqlOperator.html#isGroup()">isGroup</a>, <a href="SqlOperator.html#isGroupAuxiliary()">isGroupAuxiliary</a>, <a href="SqlOperator.html#isName(java.lang.String,boolean)">isName</a>, <a href="SqlOperator.html#isSymmetrical()">isSymmetrical</a>, <a href="SqlOperator.html#leftPrec(int,boolean)">leftPrec</a>, <a href="SqlOperator.html#not()">not</a>, <a href="SqlOperator.html#preValidateCall(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall)">preValidateCall</a>, <a href="SqlOperator.html#requiresDecimalExpansion()">requiresDecimalExpansion</a>, <a href="SqlOperator.html#requiresOrder()">requiresOrder</a>, <a href="SqlOperator.html#requiresOver()">requiresOver</a>, <a href="SqlOperator.html#reverse()">reverse</a>, <a href="SqlOperator.html#rewriteCall(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.SqlCall)">rewriteCall</a>, <a href="SqlOperator.html#rightPrec(int,boolean)">rightPrec</a>, <a href="SqlOperator.html#toString()">toString</a>, <a href="SqlOperator.html#unparseListClause(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlNode)">unparseListClause</a>, <a href="SqlOperator.html#unparseListClause(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlNode,org.apache.calcite.sql.SqlKind)">unparseListClause</a>, <a href="SqlOperator.html#validateOperands(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall)">validateOperands</a>, <a href="SqlOperator.html#validRexOperands(int,org.apache.calcite.util.Litmus)">validRexOperands</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;(org.apache.calcite.sql.SqlKind)">
<h3>SqlNullTreatmentOperator</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">SqlNullTreatmentOperator</span><wbr><span class="parameters">(<a href="SqlKind.html" title="enum in org.apache.calcite.sql">SqlKind</a>&nbsp;kind)</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNode...)">
<h3>createCall</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a></span>&nbsp;<span class="element-name">createCall</span><wbr><span class="parameters">(@Nullable <a href="SqlLiteral.html" title="class in org.apache.calcite.sql">SqlLiteral</a>&nbsp;functionQualifier,
<a href="parser/SqlParserPos.html" title="class in org.apache.calcite.sql.parser">SqlParserPos</a>&nbsp;pos,
@Nullable <a href="SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a>...&nbsp;operands)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from class:&nbsp;<code><a href="SqlOperator.html#createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNode...)">SqlOperator</a></code></span></div>
<div class="block">Creates a call to this operator with an array of operands.
<p>The position of the resulting call is the union of the <code>pos</code>
and the positions of all of the operands.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="SqlOperator.html#createCall(org.apache.calcite.sql.SqlLiteral,org.apache.calcite.sql.parser.SqlParserPos,org.apache.calcite.sql.SqlNode...)">createCall</a></code>&nbsp;in class&nbsp;<code><a href="SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a></code></dd>
<dt>Parameters:</dt>
<dd><code>functionQualifier</code> - Function qualifier (e.g. "DISTINCT"), or null</dd>
<dd><code>pos</code> - Parser position of the identifier of the call</dd>
<dd><code>operands</code> - Array of operands</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="unparse(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlCall,int,int)">
<h3>unparse</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">unparse</span><wbr><span class="parameters">(<a href="SqlWriter.html" title="interface in org.apache.calcite.sql">SqlWriter</a>&nbsp;writer,
<a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a>&nbsp;call,
int&nbsp;leftPrec,
int&nbsp;rightPrec)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from class:&nbsp;<code><a href="SqlOperator.html#unparse(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlCall,int,int)">SqlOperator</a></code></span></div>
<div class="block">Writes a SQL representation of a call to this operator to a writer,
including parentheses if the operators on either side are of greater
precedence.
<p>The default implementation of this method delegates to
<a href="SqlSyntax.html#unparse(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlOperator,org.apache.calcite.sql.SqlCall,int,int)"><code>SqlSyntax.unparse(org.apache.calcite.sql.SqlWriter, org.apache.calcite.sql.SqlOperator, org.apache.calcite.sql.SqlCall, int, int)</code></a>.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="SqlOperator.html#unparse(org.apache.calcite.sql.SqlWriter,org.apache.calcite.sql.SqlCall,int,int)">unparse</a></code>&nbsp;in class&nbsp;<code><a href="SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="validateCall(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.validate.SqlValidatorScope)">
<h3>validateCall</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">validateCall</span><wbr><span class="parameters">(<a href="SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a>&nbsp;call,
<a href="validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a>&nbsp;validator,
<a href="validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a>&nbsp;scope,
<a href="validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a>&nbsp;operandScope)</span></div>
<div class="block"><span class="descfrm-type-label">Description copied from class:&nbsp;<code><a href="SqlOperator.html#validateCall(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.validate.SqlValidatorScope)">SqlOperator</a></code></span></div>
<div class="block">Validates a call to this operator.
<p>This method should not perform type-derivation or perform validation
related related to types. That is done later, by
<a href="SqlOperator.html#deriveType(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall)"><code>SqlOperator.deriveType(SqlValidator, SqlValidatorScope, SqlCall)</code></a>. This method
should focus on structural validation.
<p>A typical implementation of this method first validates the operands,
then performs some operator-specific logic. The default implementation
just validates the operands.
<p>This method is the default implementation of <a href="SqlCall.html#validate(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope)"><code>SqlCall.validate(org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorScope)</code></a>;
but note that some sub-classes of <a href="SqlCall.html" title="class in org.apache.calcite.sql"><code>SqlCall</code></a> never call this method.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="SqlOperator.html#validateCall(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.validate.SqlValidatorScope)">validateCall</a></code>&nbsp;in class&nbsp;<code><a href="SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a></code></dd>
<dt>Parameters:</dt>
<dd><code>call</code> - the call to this operator</dd>
<dd><code>validator</code> - the active validator</dd>
<dd><code>scope</code> - validator scope</dd>
<dd><code>operandScope</code> - validator scope in which to validate operands to this
call; usually equal to scope, but not always because
some operators introduce new scopes</dd>
<dt>See Also:</dt>
<dd>
<ul class="see-list-long">
<li><a href="SqlNode.html#validateExpr(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope)"><code>SqlNode.validateExpr(SqlValidator, SqlValidatorScope)</code></a></li>
<li><a href="SqlOperator.html#deriveType(org.apache.calcite.sql.validate.SqlValidator,org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall)"><code>SqlOperator.deriveType(SqlValidator, SqlValidatorScope, SqlCall)</code></a></li>
</ul>
</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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