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| <li>Summary: </li> |
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| <li>Field | </li> |
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| <div class="subTitle">org.apache.drill.exec.planner.index</div> |
| <h2 title="Interface IndexCollection" class="title">Interface IndexCollection</h2> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a>></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../../org/apache/drill/exec/planner/index/AbstractIndexCollection.html" title="class in org.apache.drill.exec.planner.index">AbstractIndexCollection</a>, <a href="../../../../../../org/apache/drill/exec/planner/index/DrillIndexCollection.html" title="class in org.apache.drill.exec.planner.index">DrillIndexCollection</a></dd> |
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| <pre>public interface <span class="typeNameLabel">IndexCollection</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a>></pre> |
| <div class="block">Interface used to describe an index collection</div> |
| </li> |
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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/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index">IndexCollection.IndexCollectionType</a></span></code> |
| <div class="block">Types of an index collections: NATIVE_SECONDARY_INDEX_COLLECTION, EXTERNAL_SECONDARY_INDEX_COLLECTION</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#addIndex-org.apache.drill.exec.planner.index.IndexDescriptor-">addIndex</a></span>(<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a> index)</code> |
| <div class="block">Add a new index to the collection.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#clearAll--">clearAll</a></span>()</code> |
| <div class="block">Clears all entries from this index collection</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/physical/base/IndexGroupScan.html" title="interface in org.apache.drill.exec.physical.base">IndexGroupScan</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#getGroupScan--">getGroupScan</a></span>()</code> |
| <div class="block">If this IndexCollection exposes a single GroupScan, return the GroupScan instance.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index">IndexCollection.IndexCollectionType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#getIndexCollectionType--">getIndexCollectionType</a></span>()</code> |
| <div class="block">Get the type of this index based on <a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index"><code>IndexCollection.IndexCollectionType</code></a></div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#getRows-org.apache.calcite.rex.RexNode-">getRows</a></span>(org.apache.calcite.rex.RexNode indexCondition)</code> |
| <div class="block">Get the estimated row count for a single index condition</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#isColumnIndexed-org.apache.drill.common.expression.SchemaPath-">isColumnIndexed</a></span>(<a href="../../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a> path)</code> |
| <div class="block">Check if the field name is the leading key of any of the indexes in this collection</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#removeIndex-org.apache.drill.exec.planner.index.IndexDescriptor-">removeIndex</a></span>(<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a> index)</code> |
| <div class="block">Remove an index (identified by table name and index name) from the collection.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#supportsFullTextSearch--">supportsFullTextSearch</a></span>()</code> |
| <div class="block">Whether or not the index supports full-text search (to allow pushing down such filters)</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#supportsIndexSelection--">supportsIndexSelection</a></span>()</code> |
| <div class="block">Whether or not this index collection supports index selection (selecting an |
| appropriate index out of multiple candidates).</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.html#supportsRowCountStats--">supportsRowCountStats</a></span>()</code> |
| <div class="block">Whether or not the index supports getting row count statistics</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Iterable"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from interface java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#forEach-java.util.function.Consumer-" title="class or interface in java.lang">forEach</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#spliterator--" title="class or interface in java.lang">spliterator</a></code></li> |
| </ul> |
| </li> |
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| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="addIndex-org.apache.drill.exec.planner.index.IndexDescriptor-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addIndex</h4> |
| <pre>boolean addIndex(<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a> index)</pre> |
| <div class="block">Add a new index to the collection. Return True if index was successfully added; False otherwise</div> |
| </li> |
| </ul> |
| <a name="removeIndex-org.apache.drill.exec.planner.index.IndexDescriptor-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>removeIndex</h4> |
| <pre>boolean removeIndex(<a href="../../../../../../org/apache/drill/exec/planner/index/IndexDescriptor.html" title="interface in org.apache.drill.exec.planner.index">IndexDescriptor</a> index)</pre> |
| <div class="block">Remove an index (identified by table name and index name) from the collection. |
| Return True if index was successfully removed; False otherwise</div> |
| </li> |
| </ul> |
| <a name="clearAll--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>clearAll</h4> |
| <pre>void clearAll()</pre> |
| <div class="block">Clears all entries from this index collection</div> |
| </li> |
| </ul> |
| <a name="getIndexCollectionType--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getIndexCollectionType</h4> |
| <pre><a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index">IndexCollection.IndexCollectionType</a> getIndexCollectionType()</pre> |
| <div class="block">Get the type of this index based on <a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index"><code>IndexCollection.IndexCollectionType</code></a></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>one of the values in <a href="../../../../../../org/apache/drill/exec/planner/index/IndexCollection.IndexCollectionType.html" title="enum in org.apache.drill.exec.planner.index"><code>IndexCollection.IndexCollectionType</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="supportsIndexSelection--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>supportsIndexSelection</h4> |
| <pre>boolean supportsIndexSelection()</pre> |
| <div class="block">Whether or not this index collection supports index selection (selecting an |
| appropriate index out of multiple candidates). Typically, external index collections |
| such as Elasticsearch already have this capability while native secondary index collection |
| may not have - in such cases, Drill needs to do the index selection.</div> |
| </li> |
| </ul> |
| <a name="getRows-org.apache.calcite.rex.RexNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getRows</h4> |
| <pre>double getRows(org.apache.calcite.rex.RexNode indexCondition)</pre> |
| <div class="block">Get the estimated row count for a single index condition</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>indexCondition</code> - The index condition (e.g index_col1 < 10 AND index_col2 = 'abc')</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The estimated row count</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="supportsRowCountStats--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>supportsRowCountStats</h4> |
| <pre>boolean supportsRowCountStats()</pre> |
| <div class="block">Whether or not the index supports getting row count statistics</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if index supports getting row count, False otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="supportsFullTextSearch--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>supportsFullTextSearch</h4> |
| <pre>boolean supportsFullTextSearch()</pre> |
| <div class="block">Whether or not the index supports full-text search (to allow pushing down such filters)</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if index supports full-text search, False otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getGroupScan--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getGroupScan</h4> |
| <pre><a href="../../../../../../org/apache/drill/exec/physical/base/IndexGroupScan.html" title="interface in org.apache.drill.exec.physical.base">IndexGroupScan</a> getGroupScan()</pre> |
| <div class="block">If this IndexCollection exposes a single GroupScan, return the GroupScan instance. For external indexes |
| such as Elasticsearch, we may have a single GroupScan representing all the indexes contained |
| within that collection. On the other hand, for native indexes, each separate index would |
| have its own GroupScan.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>GroupScan for this IndexCollection if available, otherwise null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isColumnIndexed-org.apache.drill.common.expression.SchemaPath-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>isColumnIndexed</h4> |
| <pre>boolean isColumnIndexed(<a href="../../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a> path)</pre> |
| <div class="block">Check if the field name is the leading key of any of the indexes in this collection</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>path</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if an appropriate index is found, False otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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