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<div class="subTitle">org.apache.calcite.sql.validate</div>
<h2 title="接口 AggregatingScope" class="title">接口 AggregatingScope</h2>
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<dt>所有超级接口:</dt>
<dd><a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a></dd>
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<dt>所有已知实现类:</dt>
<dd><a href="../../../../../org/apache/calcite/sql/validate/AggregatingSelectScope.html" title="org.apache.calcite.sql.validate中的类">AggregatingSelectScope</a></dd>
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<pre>public interface <span class="typeNameLabel">AggregatingScope</span>
extends <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a></pre>
<div class="block">An extension to the <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口"><code>SqlValidatorScope</code></a> interface which indicates that
the scope is aggregating.
<p>A scope which is aggregating must implement this interface. Such a scope
will return the same set of identifiers as its parent scope, but some of
those identifiers may not be accessible because they are not in the GROUP BY
clause.</div>
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<h3>从接口继承的嵌套类/接口&nbsp;org.apache.calcite.sql.validate.<a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a></h3>
<code><a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.EmptyPath.html" title="org.apache.calcite.sql.validate中的类">SqlValidatorScope.EmptyPath</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.Path.html" title="org.apache.calcite.sql.validate中的类">SqlValidatorScope.Path</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.Resolve.html" title="org.apache.calcite.sql.validate中的类">SqlValidatorScope.Resolve</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.Resolved.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope.Resolved</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.ResolvedImpl.html" title="org.apache.calcite.sql.validate中的类">SqlValidatorScope.ResolvedImpl</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.Step.html" title="org.apache.calcite.sql.validate中的类">SqlValidatorScope.Step</a></code></li>
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<caption><span id="t0" class="activeTableTab"><span>所有方法</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="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/sql/validate/AggregatingScope.html#checkAggregateExpr-org.apache.calcite.sql.SqlNode-boolean-">checkAggregateExpr</a></span>(<a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;expr,
boolean&nbsp;deep)</code>
<div class="block">Checks whether an expression is constant within the GROUP BY clause.</div>
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<h3>从接口继承的方法&nbsp;org.apache.calcite.sql.validate.<a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="org.apache.calcite.sql.validate中的接口">SqlValidatorScope</a></h3>
<code><a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#addChild-org.apache.calcite.sql.validate.SqlValidatorNamespace-java.lang.String-boolean-">addChild</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#findAliases-java.util.Collection-">findAliases</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#findAllColumnNames-java.util.List-">findAllColumnNames</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#findQualifyingTableName-java.lang.String-org.apache.calcite.sql.SqlNode-">findQualifyingTableName</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#findQualifyingTableNames-java.lang.String-org.apache.calcite.sql.SqlNode-org.apache.calcite.sql.validate.SqlNameMatcher-">findQualifyingTableNames</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#fullyQualify-org.apache.calcite.sql.SqlIdentifier-">fullyQualify</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getMonotonicity-org.apache.calcite.sql.SqlNode-">getMonotonicity</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getNode--">getNode</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getOperandScope-org.apache.calcite.sql.SqlCall-">getOperandScope</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getOrderList--">getOrderList</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getTableNamespace-java.util.List-">getTableNamespace</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#getValidator--">getValidator</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#isWithin-org.apache.calcite.sql.validate.SqlValidatorScope-">isWithin</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#lookupWindow-java.lang.String-">lookupWindow</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#nullifyType-org.apache.calcite.sql.SqlNode-org.apache.calcite.rel.type.RelDataType-">nullifyType</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#resolve-java.util.List-org.apache.calcite.sql.validate.SqlNameMatcher-boolean-org.apache.calcite.sql.validate.SqlValidatorScope.Resolved-">resolve</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#resolveColumn-java.lang.String-org.apache.calcite.sql.SqlNode-">resolveColumn</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#resolveTable-java.util.List-org.apache.calcite.sql.validate.SqlNameMatcher-org.apache.calcite.sql.validate.SqlValidatorScope.Path-org.apache.calcite.sql.validate.SqlValidatorScope.Resolved-">resolveTable</a>, <a href="../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html#validateExpr-org.apache.calcite.sql.SqlNode-">validateExpr</a></code></li>
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<h4>checkAggregateExpr</h4>
<pre>boolean&nbsp;checkAggregateExpr(<a href="../../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类">SqlNode</a>&nbsp;expr,
boolean&nbsp;deep)</pre>
<div class="block">Checks whether an expression is constant within the GROUP BY clause. If
the expression completely matches an expression in the GROUP BY clause,
returns true. If the expression is constant within the group, but does
not exactly match, returns false. If the expression is not constant,
throws an exception. Examples:
<ul>
<li>If we are 'f(b, c)' in 'SELECT a + f(b, c) FROM t GROUP BY a', then
the whole expression matches a group column. Return true.
<li>Just an ordinary expression in a GROUP BY query, such as 'f(SUM(a),
1, b)' in 'SELECT f(SUM(a), 1, b) FROM t GROUP BY b'. Returns false.
<li>Illegal expression, such as 'f(5, a, b)' in 'SELECT f(a, b) FROM t
GROUP BY a'. Throws when it enounters the 'b' operand, because it is not
in the group clause.
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