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<div class="subTitle">org.apache.iceberg.util</div>
<h2 title="Class SnapshotUtil" class="title">Class SnapshotUtil</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.iceberg.util.SnapshotUtil</li>
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<pre>public class <span class="typeNameLabel">SnapshotUtil</span>
extends java.lang.Object</pre>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</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>static java.util.List&lt;java.lang.Long&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#ancestorIds-org.apache.iceberg.Snapshot-java.util.function.Function-">ancestorIds</a></span>(<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&nbsp;snapshot,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static java.lang.Iterable&lt;java.lang.Long&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#ancestorIdsBetween-long-java.lang.Long-java.util.function.Function-">ancestorIdsBetween</a></span>(long&nbsp;latestSnapshotId,
java.lang.Long&nbsp;oldestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#ancestorsBetween-long-java.lang.Long-java.util.function.Function-">ancestorsBetween</a></span>(long&nbsp;latestSnapshotId,
java.lang.Long&nbsp;oldestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#ancestorsOf-long-java.util.function.Function-">ancestorsOf</a></span>(long&nbsp;snapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.Long&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#currentAncestorIds-org.apache.iceberg.Table-">currentAncestorIds</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</code>
<div class="block">Return the snapshot IDs for the ancestors of the current table state.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#currentAncestors-org.apache.iceberg.Table-">currentAncestors</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</code>
<div class="block">Returns an iterable that traverses the table's snapshots from the current to the last known ancestor.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#isAncestorOf-org.apache.iceberg.Table-long-">isAncestorOf</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;ancestorSnapshotId)</code>
<div class="block">Returns whether ancestorSnapshotId is an ancestor of the table's current state.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#isAncestorOf-org.apache.iceberg.Table-long-long-">isAncestorOf</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId,
long&nbsp;ancestorSnapshotId)</code>
<div class="block">Returns whether ancestorSnapshotId is an ancestor of snapshotId.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static java.util.List&lt;<a href="../../../../org/apache/iceberg/DataFile.html" title="interface in org.apache.iceberg">DataFile</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#newFiles-java.lang.Long-long-java.util.function.Function-">newFiles</a></span>(java.lang.Long&nbsp;baseSnapshotId,
long&nbsp;latestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#oldestAncestor-org.apache.iceberg.Table-">oldestAncestor</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</code>
<div class="block">Traverses the history of the table's current snapshot and finds the oldest Snapshot.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#oldestAncestorAfter-org.apache.iceberg.Table-long-">oldestAncestorAfter</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;timestampMillis)</code>
<div class="block">Traverses the history of the table's current snapshot and finds the first snapshot committed after the given time.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/iceberg/Schema.html" title="class in org.apache.iceberg">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#schemaFor-org.apache.iceberg.Table-long-">schemaFor</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId)</code>
<div class="block">Returns the schema of the table for the specified snapshot.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/iceberg/Schema.html" title="class in org.apache.iceberg">Schema</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#schemaFor-org.apache.iceberg.Table-java.lang.Long-java.lang.Long-">schemaFor</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
java.lang.Long&nbsp;snapshotId,
java.lang.Long&nbsp;timestampMillis)</code>
<div class="block">Convenience method for returning the schema of the table for a snapshot,
when we have a snapshot id or a timestamp.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#snapshotAfter-org.apache.iceberg.Table-long-">snapshotAfter</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId)</code>
<div class="block">Traverses the history of the table's current snapshot and finds the snapshot with the given snapshot id as its
parent.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#snapshotIdAsOfTime-org.apache.iceberg.Table-long-">snapshotIdAsOfTime</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;timestampMillis)</code>
<div class="block">Returns the ID of the most recent snapshot for the table as of the timestamp.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.Long&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/util/SnapshotUtil.html#snapshotIdsBetween-org.apache.iceberg.Table-long-long-">snapshotIdsBetween</a></span>(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;fromSnapshotId,
long&nbsp;toSnapshotId)</code>
<div class="block">Returns list of snapshot ids in the range - (fromSnapshotId, toSnapshotId]</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>isAncestorOf</h4>
<pre>public static&nbsp;boolean&nbsp;isAncestorOf(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId,
long&nbsp;ancestorSnapshotId)</pre>
<div class="block">Returns whether ancestorSnapshotId is an ancestor of snapshotId.</div>
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<pre>public static&nbsp;boolean&nbsp;isAncestorOf(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;ancestorSnapshotId)</pre>
<div class="block">Returns whether ancestorSnapshotId is an ancestor of the table's current state.</div>
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<a name="currentAncestors-org.apache.iceberg.Table-">
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<h4>currentAncestors</h4>
<pre>public static&nbsp;java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;currentAncestors(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</pre>
<div class="block">Returns an iterable that traverses the table's snapshots from the current to the last known ancestor.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a Table</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterable from the table's current snapshot to its last known ancestor</dd>
</dl>
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<h4>currentAncestorIds</h4>
<pre>public static&nbsp;java.util.List&lt;java.lang.Long&gt;&nbsp;currentAncestorIds(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</pre>
<div class="block">Return the snapshot IDs for the ancestors of the current table state.
<p>
Ancestor IDs are ordered by commit time, descending. The first ID is the current snapshot, followed by its parent,
and so on.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a <a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg"><code>Table</code></a></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a set of snapshot IDs of the known ancestor snapshots, including the current ID</dd>
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<h4>oldestAncestor</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&nbsp;oldestAncestor(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table)</pre>
<div class="block">Traverses the history of the table's current snapshot and finds the oldest Snapshot.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>null if there is no current snapshot in the table, else the oldest Snapshot.</dd>
</dl>
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<pre>public static&nbsp;java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;ancestorsOf(long&nbsp;snapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</pre>
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<h4>oldestAncestorAfter</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&nbsp;oldestAncestorAfter(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;timestampMillis)</pre>
<div class="block">Traverses the history of the table's current snapshot and finds the first snapshot committed after the given time.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a table</dd>
<dd><code>timestampMillis</code> - a timestamp in milliseconds</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the first snapshot after the given timestamp, or null if the current snapshot is older than the timestamp</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the first ancestor after the given time can't be determined</dd>
</dl>
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<h4>snapshotIdsBetween</h4>
<pre>public static&nbsp;java.util.List&lt;java.lang.Long&gt;&nbsp;snapshotIdsBetween(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;fromSnapshotId,
long&nbsp;toSnapshotId)</pre>
<div class="block">Returns list of snapshot ids in the range - (fromSnapshotId, toSnapshotId]
<p>
This method assumes that fromSnapshotId is an ancestor of toSnapshotId.</div>
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<pre>public static&nbsp;java.lang.Iterable&lt;java.lang.Long&gt;&nbsp;ancestorIdsBetween(long&nbsp;latestSnapshotId,
java.lang.Long&nbsp;oldestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</pre>
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<pre>public static&nbsp;java.lang.Iterable&lt;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;ancestorsBetween(long&nbsp;latestSnapshotId,
java.lang.Long&nbsp;oldestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</pre>
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<pre>public static&nbsp;java.util.List&lt;java.lang.Long&gt;&nbsp;ancestorIds(<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&nbsp;snapshot,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</pre>
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<pre>public static&nbsp;java.util.List&lt;<a href="../../../../org/apache/iceberg/DataFile.html" title="interface in org.apache.iceberg">DataFile</a>&gt;&nbsp;newFiles(java.lang.Long&nbsp;baseSnapshotId,
long&nbsp;latestSnapshotId,
java.util.function.Function&lt;java.lang.Long,<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&gt;&nbsp;lookup)</pre>
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<h4>snapshotAfter</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/iceberg/Snapshot.html" title="interface in org.apache.iceberg">Snapshot</a>&nbsp;snapshotAfter(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId)</pre>
<div class="block">Traverses the history of the table's current snapshot and finds the snapshot with the given snapshot id as its
parent.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the snapshot for which the given snapshot is the parent</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - when the given snapshotId is not found in the table</dd>
<dd><code>java.lang.IllegalStateException</code> - when the given snapshotId is not an ancestor of the current table state</dd>
</dl>
</li>
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<h4>snapshotIdAsOfTime</h4>
<pre>public static&nbsp;long&nbsp;snapshotIdAsOfTime(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;timestampMillis)</pre>
<div class="block">Returns the ID of the most recent snapshot for the table as of the timestamp.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a <a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg"><code>Table</code></a></dd>
<dd><code>timestampMillis</code> - the timestamp in millis since the Unix epoch</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the snapshot ID</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - when no snapshot is found in the table
older than the timestamp</dd>
</dl>
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<h4>schemaFor</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/iceberg/Schema.html" title="class in org.apache.iceberg">Schema</a>&nbsp;schemaFor(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
long&nbsp;snapshotId)</pre>
<div class="block">Returns the schema of the table for the specified snapshot.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a <a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg"><code>Table</code></a></dd>
<dd><code>snapshotId</code> - the ID of the snapshot</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the schema</dd>
</dl>
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<h4>schemaFor</h4>
<pre>public static&nbsp;<a href="../../../../org/apache/iceberg/Schema.html" title="class in org.apache.iceberg">Schema</a>&nbsp;schemaFor(<a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg">Table</a>&nbsp;table,
java.lang.Long&nbsp;snapshotId,
java.lang.Long&nbsp;timestampMillis)</pre>
<div class="block">Convenience method for returning the schema of the table for a snapshot,
when we have a snapshot id or a timestamp. Only one of them should be specified
(non-null), or an IllegalArgumentException is thrown.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>table</code> - a <a href="../../../../org/apache/iceberg/Table.html" title="interface in org.apache.iceberg"><code>Table</code></a></dd>
<dd><code>snapshotId</code> - the ID of the snapshot</dd>
<dd><code>timestampMillis</code> - the timestamp in millis since the Unix epoch</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the schema</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if both snapshotId and timestampMillis are non-null</dd>
</dl>
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