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| <div class="subTitle">org.apache.hadoop.hbase.filter</div> |
| <h2 title="Class MultiRowRangeFilter" class="title">Class MultiRowRangeFilter</h2> |
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| <li>org.apache.hadoop.hbase.filter.FilterBase</li> |
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| <li>org.apache.hadoop.hbase.filter.MultiRowRangeFilter</li> |
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| <pre>@InterfaceAudience.Public |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.53">MultiRowRangeFilter</a> |
| extends org.apache.hadoop.hbase.filter.FilterBase</pre> |
| <div class="block">Filter to support scan multiple row key ranges. It can construct the row key ranges from the |
| passed list which can be accessed by each region server. |
| |
| HBase is quite efficient when scanning only one small row key range. If user needs to specify |
| multiple row key ranges in one scan, the typical solutions are: 1. through FilterList which is a |
| list of row key Filters, 2. using the SQL layer over HBase to join with two table, such as hive, |
| phoenix etc. However, both solutions are inefficient. Both of them can't utilize the range info |
| to perform fast forwarding during scan which is quite time consuming. If the number of ranges |
| are quite big (e.g. millions), join is a proper solution though it is slow. However, there are |
| cases that user wants to specify a small number of ranges to scan (e.g. <1000 ranges). Both |
| solutions can't provide satisfactory performance in such case. MultiRowRangeFilter is to support |
| such usec ase (scan multiple row key ranges), which can construct the row key ranges from user |
| specified list and perform fast-forwarding during scan. Thus, the scan will be quite efficient.</div> |
| </li> |
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| <td class="colFirst"><code>static class </code></td> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.ReturnCode.html" title="enum in org.apache.hadoop.hbase.filter">Filter.ReturnCode</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#MultiRowRangeFilter-byte:A:A-">MultiRowRangeFilter</a></span>(byte[][] rowKeyPrefixes)</code> |
| <div class="block">Constructor for creating a <code>MultiRowRangeFilter</code> from multiple rowkey prefixes.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#MultiRowRangeFilter-java.util.List-">MultiRowRangeFilter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> list)</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> obj)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#filterAllRemaining--">filterAllRemaining</a></span>()</code> |
| <div class="block">Filters that never filter all remaining can inherit this implementation that |
| never stops the filter early.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.ReturnCode.html" title="enum in org.apache.hadoop.hbase.filter">Filter.ReturnCode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#filterCell-org.apache.hadoop.hbase.Cell-">filterCell</a></span>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> ignored)</code> |
| <div class="block">A way to filter based on the column family, column qualifier and/or the column value.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#filterRowKey-org.apache.hadoop.hbase.Cell-">filterRowKey</a></span>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> firstRowCell)</code> |
| <div class="block">Filters a row based on the row key.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#getNextCellHint-org.apache.hadoop.hbase.Cell-">getNextCellHint</a></span>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> currentKV)</code> |
| <div class="block">Filters that are not sure which key must be next seeked to, can inherit |
| this implementation that, by default, returns a null Cell.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#getRowRanges--">getRowRanges</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#hashCode--">hashCode</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#parseFrom-byte:A-">parseFrom</a></span>(byte[] pbBytes)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#sortAndMerge-java.util.List-">sortAndMerge</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> ranges)</code> |
| <div class="block">sort the ranges and if the ranges with overlap, then merge them.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#toByteArray--">toByteArray</a></span>()</code> |
| <div class="block">Return length 0 byte array for Filters that don't require special serialization</div> |
| </td> |
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| <h3>Methods inherited from class org.apache.hadoop.hbase.filter.FilterBase</h3> |
| <code>createFilterFromArguments, filterRow, filterRowCells, hasFilterRow, isFamilyEssential, reset, toString, transformCell</code></li> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#isReversed--">isReversed</a>, <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#setReversed-boolean-">setReversed</a></code></li> |
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| <h4>MultiRowRangeFilter</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.68">MultiRowRangeFilter</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> list)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>list</code> - A list of <code>RowRange</code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>MultiRowRangeFilter</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.85">MultiRowRangeFilter</a>(byte[][] rowKeyPrefixes)</pre> |
| <div class="block">Constructor for creating a <code>MultiRowRangeFilter</code> from multiple rowkey prefixes. |
| |
| As <code>MultiRowRangeFilter</code> javadoc says (See the solution 1 of the first statement), |
| if you try to create a filter list that scans row keys corresponding to given prefixes (e.g., |
| <code>FilterList</code> composed of multiple <code>PrefixFilter</code>s), this constructor |
| provides a way to avoid creating an inefficient one.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rowKeyPrefixes</code> - the array of byte array</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getRowRanges</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.102">getRowRanges</a>()</pre> |
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| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.108">filterAllRemaining</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hbase.filter.FilterBase</code></span></div> |
| <div class="block">Filters that never filter all remaining can inherit this implementation that |
| never stops the filter early. |
| |
| If this returns true, the scan will terminate. |
| |
| Concrete implementers can signal a failure condition in their code by throwing an |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io"><code>IOException</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>filterAllRemaining</code> in class <code>org.apache.hadoop.hbase.filter.FilterBase</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true to end scan, false to continue.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>filterRowKey</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.113">filterRowKey</a>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> firstRowCell)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterRowKey-org.apache.hadoop.hbase.Cell-">Filter</a></code></span></div> |
| <div class="block">Filters a row based on the row key. If this returns true, the entire row will be excluded. If |
| false, each KeyValue in the row will be passed to <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterCell-org.apache.hadoop.hbase.Cell-"><code>Filter.filterCell(Cell)</code></a> below. |
| If <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterAllRemaining--"><code>Filter.filterAllRemaining()</code></a> returns true, then <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterRowKey-org.apache.hadoop.hbase.Cell-"><code>Filter.filterRowKey(Cell)</code></a> should |
| also return true. |
| |
| Concrete implementers can signal a failure condition in their code by throwing an |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io"><code>IOException</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>filterRowKey</code> in class <code>org.apache.hadoop.hbase.filter.FilterBase</code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>firstRowCell</code> - The first cell coming in the new row</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true, remove entire row, false, include the row (maybe).</dd> |
| </dl> |
| </li> |
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| <h4>filterCell</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.ReturnCode.html" title="enum in org.apache.hadoop.hbase.filter">Filter.ReturnCode</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.169">filterCell</a>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> ignored)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterCell-org.apache.hadoop.hbase.Cell-">Filter</a></code></span></div> |
| <div class="block">A way to filter based on the column family, column qualifier and/or the column value. Return |
| code is described below. This allows filters to filter only certain number of columns, then |
| terminate without matching ever column. |
| |
| If filterRowKey returns true, filterCell needs to be consistent with it. |
| |
| filterCell can assume that filterRowKey has already been called for the row. |
| |
| If your filter returns <code>ReturnCode.NEXT_ROW</code>, it should return |
| <code>ReturnCode.NEXT_ROW</code> until <a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#reset--"><code>Filter.reset()</code></a> is called just in case the caller calls |
| for the next row. |
| |
| Concrete implementers can signal a failure condition in their code by throwing an |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io"><code>IOException</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html#filterCell-org.apache.hadoop.hbase.Cell-">filterCell</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.html" title="class in org.apache.hadoop.hbase.filter">Filter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ignored</code> - the Cell in question</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>code as described below</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/filter/Filter.ReturnCode.html" title="enum in org.apache.hadoop.hbase.filter"><code>Filter.ReturnCode</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getNextCellHint-org.apache.hadoop.hbase.Cell-"> |
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| <h4>getNextCellHint</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.174">getNextCellHint</a>(<a href="../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> currentKV)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hbase.filter.FilterBase</code></span></div> |
| <div class="block">Filters that are not sure which key must be next seeked to, can inherit |
| this implementation that, by default, returns a null Cell. |
| |
| If the filter returns the match code SEEK_NEXT_USING_HINT, then it should also tell which is |
| the next key it must seek to. After receiving the match code SEEK_NEXT_USING_HINT, the |
| QueryMatcher would call this function to find out which key it must next seek to. |
| |
| Concrete implementers can signal a failure condition in their code by throwing an |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io"><code>IOException</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>getNextCellHint</code> in class <code>org.apache.hadoop.hbase.filter.FilterBase</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>KeyValue which must be next seeked. return null if the filter is not sure which key to |
| seek to next.</dd> |
| </dl> |
| </li> |
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| <h4>toByteArray</h4> |
| <pre>public byte[] <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.185">toByteArray</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code>org.apache.hadoop.hbase.filter.FilterBase</code></span></div> |
| <div class="block">Return length 0 byte array for Filters that don't require special serialization</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>toByteArray</code> in class <code>org.apache.hadoop.hbase.filter.FilterBase</code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The filter serialized using pb</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>parseFrom</h4> |
| <pre>public static <a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.208">parseFrom</a>(byte[] pbBytes) |
| throws org.apache.hadoop.hbase.exceptions.DeserializationException</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>pbBytes</code> - A pb serialized instance</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An instance of MultiRowRangeFilter</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.hadoop.hbase.exceptions.DeserializationException</code></dd> |
| </dl> |
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| <h4>sortAndMerge</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.262">sortAndMerge</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/filter/MultiRowRangeFilter.RowRange.html" title="class in org.apache.hadoop.hbase.filter">MultiRowRangeFilter.RowRange</a>> ranges)</pre> |
| <div class="block">sort the ranges and if the ranges with overlap, then merge them.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ranges</code> - the list of ranges to sort and merge.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the ranges after sort and merge.</dd> |
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| <h4>equals</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.766">equals</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> obj)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd> |
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| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.html#line.771">hashCode</a>()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd> |
| </dl> |
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