javadoc/0.12.1/org/apache/iceberg/IsolationLevel.html - iceberg - Git at Google

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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.iceberg</a></div>
 <h2 title="Enum IsolationLevel" class="title">Enum IsolationLevel</h2>
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 <li>java.lang.Object</li>
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 <li>java.lang.Enum&lt;<a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>&gt;</li>
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 <pre>public enum <span class="typeNameLabel">IsolationLevel</span>
 extends java.lang.Enum&lt;<a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>&gt;</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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 <th class="colFirst" scope="row"><code><span class="memberNameLink"><a href="#SERIALIZABLE">SERIALIZABLE</a></span></code></th>
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 <td class="colFirst"><code>static <a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#valueOf(java.lang.String)">valueOf</a></span>&#8203;(java.lang.String&nbsp;name)</code></th>
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 <div class="block">Returns the enum constant of this type with the specified name.</div>
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 <td class="colFirst"><code>static <a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>[]</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#values()">values</a></span>()</code></th>
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 <pre>public static final&nbsp;<a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a> SERIALIZABLE</pre>
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 <pre class="methodSignature">public static&nbsp;<a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>[]&nbsp;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())
 &nbsp;   System.out.println(c);
 </pre></div>
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 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>
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 <dt><span class="throwsLabel">Throws:</span></dt>
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	<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.iceberg</a></div>
	<h2 title="Enum IsolationLevel" class="title">Enum IsolationLevel</h2>
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	<li>java.lang.Object</li>
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	<li>java.lang.Enum<<a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>></li>
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	<hr>
	<pre>public enum <span class="typeNameLabel">IsolationLevel</span>
	extends java.lang.Enum<<a href="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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	<th class="colFirst" scope="col">Enum Constant</th>
	<th class="colLast" scope="col">Description</th>
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	<tr class="altColor">
	<th class="colFirst" scope="row"><code><span class="memberNameLink"><a href="#SERIALIZABLE">SERIALIZABLE</a></span></code></th>
	<td class="colLast"> </td>
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	<th class="colFirst" scope="row"><code><span class="memberNameLink"><a href="#SNAPSHOT">SNAPSHOT</a></span></code></th>
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	<td class="colFirst"><code>static <a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#valueOf(java.lang.String)">valueOf</a></span>(java.lang.String name)</code></th>
	<td class="colLast">
	<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="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a>[]</code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#values()">values</a></span>()</code></th>
	<td class="colLast">
	<div class="block">Returns an array containing the constants of this enum type, in
	the order they are declared.</div>
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	<code>getClass, notify, notifyAll, wait, wait, wait</code></li>
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	<h4>SERIALIZABLE</h4>
	<pre>public static final <a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a> SERIALIZABLE</pre>
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	<pre>public static final <a href="IsolationLevel.html" title="enum in org.apache.iceberg">IsolationLevel</a> SNAPSHOT</pre>
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	<h4>values</h4>
	<pre class="methodSignature">public static <a href="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 class="methodSignature">public static <a href="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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