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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.statistic</a></div> |
| <h1 title="Class QuerySqlStatisticProvider" class="title">Class QuerySqlStatisticProvider</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">org.apache.calcite.statistic.QuerySqlStatisticProvider</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">QuerySqlStatisticProvider</span> |
| <span class="extends-implements">extends <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> |
| implements <a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></span></div> |
| <div class="block">Implementation of <a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize"><code>SqlStatisticProvider</code></a> that generates and executes |
| SQL queries.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static final <a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></div> |
| <div class="col-second even-row-color"><code><a href="#SILENT_CACHING_INSTANCE" class="member-name-link">SILENT_CACHING_INSTANCE</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Instance that uses SQL to compute statistics, |
| does not log SQL statements, |
| and caches up to 1,024 results for up to 30 minutes.</div> |
| </div> |
| <div class="col-first odd-row-color"><code>static final <a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></div> |
| <div class="col-second odd-row-color"><code><a href="#VERBOSE_CACHING_INSTANCE" class="member-name-link">VERBOSE_CACHING_INSTANCE</a></code></div> |
| <div class="col-last odd-row-color"> |
| <div class="block">As <a href="#SILENT_CACHING_INSTANCE"><code>SILENT_CACHING_INSTANCE</code></a> but prints SQL statements to |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/System.html#out" title="class or interface in java.lang" class="external-link"><code>System.out</code></a>.</div> |
| </div> |
| </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(java.util.function.Consumer)" class="member-name-link">QuerySqlStatisticProvider</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/function/Consumer.html" title="class or interface in java.util.function" class="external-link">Consumer</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>> sqlConsumer)</code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Creates a QuerySqlStatisticProvider.</div> |
| </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> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <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>boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isForeignKey(org.apache.calcite.plan.RelOptTable,java.util.List,org.apache.calcite.plan.RelOptTable,java.util.List)" class="member-name-link">isForeignKey</a><wbr>(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> fromTable, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> fromColumns, |
| <a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> toTable, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> toColumns)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns whether a join is a foreign key; that is, whether every row in |
| the referencing table is matched by at least one row in the referenced |
| table.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isKey(org.apache.calcite.plan.RelOptTable,java.util.List)" class="member-name-link">isKey</a><wbr>(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> columns)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns whether a collection of columns is a unique (or primary) key.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>double</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#tableCardinality(org.apache.calcite.plan.RelOptTable)" class="member-name-link">tableCardinality</a><wbr>(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns an estimate of the number of rows in <code>table</code>.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toSql(org.apache.calcite.rel.RelNode,org.apache.calcite.sql.SqlDialect)" class="member-name-link">toSql</a><wbr>(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../sql/SqlDialect.html" title="class in org.apache.calcite.sql">SqlDialect</a> dialect)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class 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#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</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#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</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#toString()" title="class or interface in java.lang" class="external-link">toString</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"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="SILENT_CACHING_INSTANCE"> |
| <h3>SILENT_CACHING_INSTANCE</h3> |
| <div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type"><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></span> <span class="element-name">SILENT_CACHING_INSTANCE</span></div> |
| <div class="block">Instance that uses SQL to compute statistics, |
| does not log SQL statements, |
| and caches up to 1,024 results for up to 30 minutes. |
| (That period should be sufficient for the |
| duration of Calcite's tests, and many other purposes.)</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="VERBOSE_CACHING_INSTANCE"> |
| <h3>VERBOSE_CACHING_INSTANCE</h3> |
| <div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type"><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></span> <span class="element-name">VERBOSE_CACHING_INSTANCE</span></div> |
| <div class="block">As <a href="#SILENT_CACHING_INSTANCE"><code>SILENT_CACHING_INSTANCE</code></a> but prints SQL statements to |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/System.html#out" title="class or interface in java.lang" class="external-link"><code>System.out</code></a>.</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>(java.util.function.Consumer)"> |
| <h3>QuerySqlStatisticProvider</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">QuerySqlStatisticProvider</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/function/Consumer.html" title="class or interface in java.util.function" class="external-link">Consumer</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>> sqlConsumer)</span></div> |
| <div class="block">Creates a QuerySqlStatisticProvider.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>sqlConsumer</code> - Called when each SQL statement is generated</dd> |
| </dl> |
| </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="tableCardinality(org.apache.calcite.plan.RelOptTable)"> |
| <h3>tableCardinality</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">double</span> <span class="element-name">tableCardinality</span><wbr><span class="parameters">(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="../materialize/SqlStatisticProvider.html#tableCardinality(org.apache.calcite.plan.RelOptTable)">SqlStatisticProvider</a></code></span></div> |
| <div class="block">Returns an estimate of the number of rows in <code>table</code>.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="../materialize/SqlStatisticProvider.html#tableCardinality(org.apache.calcite.plan.RelOptTable)">tableCardinality</a></code> in interface <code><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="isForeignKey(org.apache.calcite.plan.RelOptTable,java.util.List,org.apache.calcite.plan.RelOptTable,java.util.List)"> |
| <h3>isForeignKey</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">isForeignKey</span><wbr><span class="parameters">(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> fromTable, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> fromColumns, |
| <a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> toTable, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> toColumns)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="../materialize/SqlStatisticProvider.html#isForeignKey(org.apache.calcite.plan.RelOptTable,java.util.List,org.apache.calcite.plan.RelOptTable,java.util.List)">SqlStatisticProvider</a></code></span></div> |
| <div class="block">Returns whether a join is a foreign key; that is, whether every row in |
| the referencing table is matched by at least one row in the referenced |
| table. |
| |
| <p>For example, <code>isForeignKey(EMP, [DEPTNO], DEPT, [DEPTNO])</code> |
| returns true. |
| |
| <p>To change "at least one" to "exactly one", you also need to call |
| <a href="../materialize/SqlStatisticProvider.html#isKey(org.apache.calcite.plan.RelOptTable,java.util.List)"><code>SqlStatisticProvider.isKey(org.apache.calcite.plan.RelOptTable, java.util.List<java.lang.Integer>)</code></a>.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="../materialize/SqlStatisticProvider.html#isForeignKey(org.apache.calcite.plan.RelOptTable,java.util.List,org.apache.calcite.plan.RelOptTable,java.util.List)">isForeignKey</a></code> in interface <code><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="isKey(org.apache.calcite.plan.RelOptTable,java.util.List)"> |
| <h3>isKey</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">isKey</span><wbr><span class="parameters">(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>> columns)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="../materialize/SqlStatisticProvider.html#isKey(org.apache.calcite.plan.RelOptTable,java.util.List)">SqlStatisticProvider</a></code></span></div> |
| <div class="block">Returns whether a collection of columns is a unique (or primary) key. |
| |
| <p>For example, <code>isKey(EMP, [DEPTNO]</code> returns true; |
| <p>For example, <code>isKey(DEPT, [DEPTNO]</code> returns false.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="../materialize/SqlStatisticProvider.html#isKey(org.apache.calcite.plan.RelOptTable,java.util.List)">isKey</a></code> in interface <code><a href="../materialize/SqlStatisticProvider.html" title="interface in org.apache.calcite.materialize">SqlStatisticProvider</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="toSql(org.apache.calcite.rel.RelNode,org.apache.calcite.sql.SqlDialect)"> |
| <h3>toSql</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span> <span class="element-name">toSql</span><wbr><span class="parameters">(<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel, |
| <a href="../sql/SqlDialect.html" title="class in org.apache.calcite.sql">SqlDialect</a> dialect)</span></div> |
| </section> |
| </li> |
| </ul> |
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