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| <h2 title="Interface Convention" class="title">Interface Convention</h2> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../org/apache/calcite/plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../org/apache/calcite/interpreter/BindableConvention.html" title="enum in org.apache.calcite.interpreter">BindableConvention</a>, <a href="../../../../org/apache/calcite/plan/Convention.Impl.html" title="class in org.apache.calcite.plan">Convention.Impl</a>, <a href="../../../../org/apache/calcite/adapter/enumerable/EnumerableConvention.html" title="enum in org.apache.calcite.adapter.enumerable">EnumerableConvention</a>, <a href="../../../../org/apache/calcite/interpreter/InterpretableConvention.html" title="enum in org.apache.calcite.interpreter">InterpretableConvention</a>, <a href="../../../../org/apache/calcite/adapter/jdbc/JdbcConvention.html" title="class in org.apache.calcite.adapter.jdbc">JdbcConvention</a></dd> |
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| <br> |
| <pre>public interface <span class="typeNameLabel">Convention</span> |
| extends <a href="../../../../org/apache/calcite/plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></pre> |
| <div class="block">Calling convention trait.</div> |
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| <h3>Nested Class Summary</h3> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Interface and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.Impl.html" title="class in org.apache.calcite.plan">Convention.Impl</a></span></code> |
| <div class="block">Default implementation.</div> |
| </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#NONE">NONE</a></span></code> |
| <div class="block">Convention that for a relational expression that does not support any |
| convention.</div> |
| </td> |
| </tr> |
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| <h3>Method Summary</h3> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>default boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#canConvertConvention-org.apache.calcite.plan.Convention-">canConvertConvention</a></span>(<a href="../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a> toConvention)</code> |
| <div class="block">Returns whether we should convert from this convention to |
| <code>toConvention</code>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>default <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#enforce-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTraitSet-">enforce</a></span>(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> required)</code> |
| <div class="block">Given an input and required traits, returns the corresponding |
| enforcer rel nodes, like physical Sort, Exchange etc.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#getInterface--">getInterface</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <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/plan/Convention.html#getName--">getName</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>default <a href="../../../../org/apache/calcite/rel/core/RelFactories.Struct.html" title="class in org.apache.calcite.rel.core">RelFactories.Struct</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#getRelFactories--">getRelFactories</a></span>()</code> |
| <div class="block">Return RelFactories struct for the convention which can be used to build RelNode</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>default boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Convention.html#useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-">useAbstractConvertersForConversion</a></span>(<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> fromTraits, |
| <a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> toTraits)</code> |
| <div class="block">Returns whether we should convert from this trait set to the other trait |
| set.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.plan.RelTrait"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from interface org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/RelTrait.html" title="interface in org.apache.calcite.plan">RelTrait</a></h3> |
| <code><a href="../../../../org/apache/calcite/plan/RelTrait.html#apply-org.apache.calcite.util.mapping.Mappings.TargetMapping-">apply</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#equals-java.lang.Object-">equals</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#getTraitDef--">getTraitDef</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#hashCode--">hashCode</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#isDefault--">isDefault</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#satisfies-org.apache.calcite.plan.RelTrait-">satisfies</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#toString--">toString</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="NONE"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>NONE</h4> |
| <pre>static final <a href="../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a> NONE</pre> |
| <div class="block">Convention that for a relational expression that does not support any |
| convention. It is not implementable, and has to be transformed to |
| something else in order to be implemented. |
| |
| <p>Relational expressions generally start off in this form.</p> |
| |
| <p>Such expressions always have infinite cost.</p></div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <li class="blockList"><a name="method.detail"> |
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| <h3>Method Detail</h3> |
| <a name="getInterface--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getInterface</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> getInterface()</pre> |
| </li> |
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| <a name="getName--"> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getName</h4> |
| <pre><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> getName()</pre> |
| </li> |
| </ul> |
| <a name="enforce-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTraitSet-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>enforce</h4> |
| <pre>default <a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> enforce(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> input, |
| <a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> required)</pre> |
| <div class="block">Given an input and required traits, returns the corresponding |
| enforcer rel nodes, like physical Sort, Exchange etc.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>input</code> - The input RelNode</dd> |
| <dd><code>required</code> - The required traits</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Physical enforcer that satisfies the required traitSet, |
| or <code>null</code> if trait enforcement is not allowed or the |
| required traitSet can't be satisfied.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="canConvertConvention-org.apache.calcite.plan.Convention-"> |
| <!-- --> |
| </a> |
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| <h4>canConvertConvention</h4> |
| <pre>default boolean canConvertConvention(<a href="../../../../org/apache/calcite/plan/Convention.html" title="interface in org.apache.calcite.plan">Convention</a> toConvention)</pre> |
| <div class="block">Returns whether we should convert from this convention to |
| <code>toConvention</code>. Used by <a href="../../../../org/apache/calcite/plan/ConventionTraitDef.html" title="class in org.apache.calcite.plan"><code>ConventionTraitDef</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>toConvention</code> - Desired convention to convert to</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Whether we should convert from this convention to toConvention</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="useAbstractConvertersForConversion-org.apache.calcite.plan.RelTraitSet-org.apache.calcite.plan.RelTraitSet-"> |
| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>useAbstractConvertersForConversion</h4> |
| <pre>default boolean useAbstractConvertersForConversion(<a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> fromTraits, |
| <a href="../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> toTraits)</pre> |
| <div class="block">Returns whether we should convert from this trait set to the other trait |
| set. |
| |
| <p>The convention decides whether it wants to handle other trait |
| conversions, e.g. collation, distribution, etc. For a given convention, we |
| will only add abstract converters to handle the trait (convention, |
| collation, distribution, etc.) conversions if this function returns true.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fromTraits</code> - Traits of the RelNode that we are converting from</dd> |
| <dd><code>toTraits</code> - Target traits</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Whether we should add converters</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRelFactories--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getRelFactories</h4> |
| <pre>default <a href="../../../../org/apache/calcite/rel/core/RelFactories.Struct.html" title="class in org.apache.calcite.rel.core">RelFactories.Struct</a> getRelFactories()</pre> |
| <div class="block">Return RelFactories struct for the convention which can be used to build RelNode</div> |
| </li> |
| </ul> |
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