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| <h2 title="Enum IsolationLevel" class="title">Enum IsolationLevel</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>java.lang.Enum<<a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.iceberg.IsolationLevel</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd>java.io.Serializable, java.lang.Comparable<<a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>></dd> |
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| <br> |
| <pre>public enum <span class="typeNameLabel">IsolationLevel</span> |
| extends java.lang.Enum<<a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>></pre> |
| <div class="block">An isolation level in a table. |
| <p> |
| Two isolation levels are supported: serializable and snapshot isolation. Both of them provide |
| a read consistent view of the table to all operations and allow readers to see only already |
| committed data. While serializable is the strongest isolation level in databases, |
| snapshot isolation is beneficial for environments with many concurrent writers. |
| <p> |
| The serializable isolation level guarantees that an ongoing UPDATE/DELETE/MERGE operation |
| fails if a concurrent transaction commits a new file that might contain rows matching |
| the condition used in UPDATE/DELETE/MERGE. For example, if there is an ongoing update |
| on a subset of rows and a concurrent transaction adds a new file with records |
| that potentially match the update condition, the update operation must fail under |
| the serializable isolation but can still commit under the snapshot isolation.</div> |
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| <tr> |
| <th class="colOne" scope="col">Enum Constant and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/IsolationLevel.html#SERIALIZABLE">SERIALIZABLE</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/IsolationLevel.html#SNAPSHOT">SNAPSHOT</a></span></code> </td> |
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| <td class="colFirst"><code>static <a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/IsolationLevel.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="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/iceberg/IsolationLevel.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>SERIALIZABLE</h4> |
| <pre>public static final <a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a> SERIALIZABLE</pre> |
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| <pre>public static <a href="../../../org/apache/iceberg/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</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 (IsolationLevel c : IsolationLevel.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/IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</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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