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| <h2 title="Enum RowLevelOperationMode" class="title">Enum RowLevelOperationMode</h2> |
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| <li>java.lang.Object</li> |
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| <ul class="inheritance"> |
| <li>java.lang.Enum<<a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a>></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.iceberg.RowLevelOperationMode</li> |
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| <dd>java.io.Serializable, java.lang.Comparable<<a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a>></dd> |
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| <hr> |
| <br> |
| <pre>public enum <span class="typeNameLabel">RowLevelOperationMode</span> |
| extends java.lang.Enum<<a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a>></pre> |
| <div class="block">Iceberg supports two ways to modify records in a table: copy-on-write and merge-on-read. |
| |
| <p>In copy-on-write, changes are materialized immediately and matching data files are replaced |
| with new data files that represent the new table state. For example, if there is a record that |
| has to be deleted, the data file that contains this record has to be replaced with another data |
| file without that record. All unchanged rows have to be copied over to the new data file. |
| |
| <p>In merge-on-read, changes aren't materialized immediately. Instead, IDs of deleted and updated |
| records are written into delete files that are applied during reads and updated/inserted records |
| are written into new data files that are committed together with the delete files. |
| |
| <p>Copy-on-write changes tend to consume more time and resources during writes but don't |
| introduce any performance overhead during reads. Merge-on-read operations, on the other hand, |
| tend to be much faster during writes but require more time and resources to apply delete files |
| during reads.</div> |
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| <th class="colOne" scope="col">Enum Constant and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#COPY_ON_WRITE">COPY_ON_WRITE</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#MERGE_ON_READ">MERGE_ON_READ</a></span></code> </td> |
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| <td class="colFirst"><code>static <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#fromName-java.lang.String-">fromName</a></span>(java.lang.String modeName)</code> </td> |
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| <td class="colFirst"><code>java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#modeName--">modeName</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#valueOf-java.lang.String-">valueOf</a></span>(java.lang.String name)</code> |
| <div class="block">Returns the enum constant of this type with the specified name.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/RowLevelOperationMode.html#values--">values</a></span>()</code> |
| <div class="block">Returns an array containing the constants of this enum type, in |
| the order they are declared.</div> |
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| <h4>COPY_ON_WRITE</h4> |
| <pre>public static final <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a> COPY_ON_WRITE</pre> |
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| <h4>MERGE_ON_READ</h4> |
| <pre>public static final <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a> MERGE_ON_READ</pre> |
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| <h4>values</h4> |
| <pre>public static <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a>[] values()</pre> |
| <div class="block">Returns an array containing the constants of this enum type, in |
| the order they are declared. This method may be used to iterate |
| over the constants as follows: |
| <pre> |
| for (RowLevelOperationMode c : RowLevelOperationMode.values()) |
| System.out.println(c); |
| </pre></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an array containing the constants of this enum type, in the order they are declared</dd> |
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| <pre>public static <a href="../../../org/apache/iceberg/RowLevelOperationMode.html" title="enum in org.apache.iceberg">RowLevelOperationMode</a> valueOf(java.lang.String name)</pre> |
| <div class="block">Returns the enum constant of this type with the specified name. |
| The string must match <i>exactly</i> an identifier used to declare an |
| enum constant in this type. (Extraneous whitespace characters are |
| not permitted.)</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - the name of the enum constant to be returned.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the enum constant with the specified name</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.lang.IllegalArgumentException</code> - if this enum type has no constant with the specified name</dd> |
| <dd><code>java.lang.NullPointerException</code> - if the argument is null</dd> |
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