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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.model</a></div> |
| <h1 title="Class JsonLattice" class="title">Class JsonLattice</h1> |
| </div> |
| <div class="contentContainer"> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.model.JsonLattice</div> |
| </div> |
| <section class="description"> |
| <hr> |
| <pre>public class <span class="typeNameLabel">JsonLattice</span> |
| extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre> |
| <div class="block">Element that describes a star schema and provides a framework for defining, |
| recognizing, and recommending materialized views at various levels of |
| aggregation. |
| |
| <p>Occurs within <a href="JsonSchema.html#lattices"><code>JsonSchema.lattices</code></a>.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="JsonRoot.html" title="class in org.apache.calcite.model"><code>Description of schema elements</code></a></dd> |
| </dl> |
| </section> |
| <section class="summary"> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <section class="fieldSummary"><a id="field.summary"> |
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| </a> |
| <h2>Field Summary</h2> |
| <div class="memberSummary"> |
| <table> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#algorithm">algorithm</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Whether to use an optimization algorithm to suggest and populate an |
| initial set of tiles.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#algorithmMaxMillis">algorithmMaxMillis</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Maximum time (in milliseconds) to run the algorithm.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#auto">auto</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Whether to materialize tiles on demand as queries are executed.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonMeasure.html" title="class in org.apache.calcite.model">JsonMeasure</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#defaultMeasures">defaultMeasures</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">List of measures that a tile should have by default.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#name">name</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">The name of this lattice.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang" class="externalLink">Double</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rowCountEstimate">rowCountEstimate</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Estimated number of rows.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sql">sql</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">SQL query that defines the lattice.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#statisticProvider">statisticProvider</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Name of a class that provides estimates of the number of distinct values |
| in each column.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonTile.html" title="class in org.apache.calcite.model">JsonTile</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#tiles">tiles</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">List of materialized aggregates to create up front.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <section class="constructorSummary"><a id="constructor.summary"> |
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| <h2>Constructor Summary</h2> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.String,java.lang.Object,java.lang.Boolean,java.lang.Boolean,java.lang.Long,java.lang.Double,java.lang.String,java.util.List)">JsonLattice</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> name, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a> sql, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang" class="externalLink">Boolean</a> auto, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang" class="externalLink">Boolean</a> algorithm, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang" class="externalLink">Long</a> algorithmMaxMillis, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang" class="externalLink">Double</a> rowCountEstimate, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> statisticProvider, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonMeasure.html" title="class in org.apache.calcite.model">JsonMeasure</a>> defaultMeasures)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <section class="methodSummary"><a id="method.summary"> |
| <!-- --> |
| </a> |
| <h2>Method Summary</h2> |
| <div class="memberSummary"> |
| <div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t2" class="tableTab" onclick="show(2);">Instance Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t4" class="tableTab" onclick="show(8);">Concrete Methods</button></div> |
| <div id="memberSummary_tabpanel" role="tabpanel"> |
| <table aria-labelledby="t0"> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#accept(org.apache.calcite.model.ModelHandler)">accept</a></span>​(<a href="ModelHandler.html" title="class in org.apache.calcite.model">ModelHandler</a> handler)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSql()">getSql</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the SQL query as a string, concatenating a list of lines if |
| necessary.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitChildren(org.apache.calcite.model.ModelHandler)">visitChildren</a></span>​(<a href="ModelHandler.html" title="class in org.apache.calcite.model">ModelHandler</a> modelHandler)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li class="blockList"> |
| <section class="fieldDetails"><a id="field.detail"> |
| <!-- --> |
| </a> |
| <h2>Field Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="name">name</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">name</span></div> |
| <div class="block">The name of this lattice. |
| |
| <p>Required.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="sql">sql</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></span> <span class="memberName">sql</span></div> |
| <div class="block">SQL query that defines the lattice. |
| |
| <p>Must be a string or a list of strings (which are concatenated into a |
| multi-line SQL string, separated by newlines). |
| |
| <p>The structure of the SQL statement, and in particular the order of |
| items in the FROM clause, defines the fact table, dimension tables, and |
| join paths for this lattice.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="auto">auto</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">boolean</span> <span class="memberName">auto</span></div> |
| <div class="block">Whether to materialize tiles on demand as queries are executed. |
| |
| <p>Optional; default is true.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="algorithm">algorithm</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">boolean</span> <span class="memberName">algorithm</span></div> |
| <div class="block">Whether to use an optimization algorithm to suggest and populate an |
| initial set of tiles. |
| |
| <p>Optional; default is false.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="algorithmMaxMillis">algorithmMaxMillis</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">long</span> <span class="memberName">algorithmMaxMillis</span></div> |
| <div class="block">Maximum time (in milliseconds) to run the algorithm. |
| |
| <p>Optional; default is -1, meaning no timeout. |
| |
| <p>When the timeout is reached, Calcite uses the best result that has |
| been obtained so far.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="rowCountEstimate">rowCountEstimate</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang" class="externalLink">Double</a></span> <span class="memberName">rowCountEstimate</span></div> |
| <div class="block">Estimated number of rows. |
| |
| <p>If null, Calcite will a query to find the real value.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="statisticProvider">statisticProvider</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">statisticProvider</span></div> |
| <div class="block">Name of a class that provides estimates of the number of distinct values |
| in each column. |
| |
| <p>The class must implement the |
| <a href="../materialize/LatticeStatisticProvider.html" title="interface in org.apache.calcite.materialize"><code>LatticeStatisticProvider</code></a> interface. |
| |
| <p>Or, you can use a class name plus a static field, for example |
| "org.apache.calcite.materialize.Lattices#CACHING_SQL_STATISTIC_PROVIDER". |
| |
| <p>If not set, Calcite will generate and execute a SQL query to find the |
| real value, and cache the results.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="tiles">tiles</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonTile.html" title="class in org.apache.calcite.model">JsonTile</a>></span> <span class="memberName">tiles</span></div> |
| <div class="block">List of materialized aggregates to create up front.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="defaultMeasures">defaultMeasures</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonMeasure.html" title="class in org.apache.calcite.model">JsonMeasure</a>></span> <span class="memberName">defaultMeasures</span></div> |
| <div class="block">List of measures that a tile should have by default. |
| |
| <p>A tile can define its own measures, including measures not in this list. |
| |
| <p>Optional. The default list is just "count(*)".</div> |
| </section> |
| </li> |
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| <h3><a id="<init>(java.lang.String,java.lang.Object,java.lang.Boolean,java.lang.Boolean,java.lang.Long,java.lang.Double,java.lang.String,java.util.List)">JsonLattice</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">JsonLattice</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> name, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a> sql, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang" class="externalLink">Boolean</a> auto, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang" class="externalLink">Boolean</a> algorithm, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang" class="externalLink">Long</a> algorithmMaxMillis, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang" class="externalLink">Double</a> rowCountEstimate, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> statisticProvider, |
| @Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="JsonMeasure.html" title="class in org.apache.calcite.model">JsonMeasure</a>> defaultMeasures)</span></div> |
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| <h3><a id="toString()">toString</a></h3> |
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| <dl> |
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| <h3><a id="getSql()">getSql</a></h3> |
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| <div class="block">Returns the SQL query as a string, concatenating a list of lines if |
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