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 <pre>public class <span class="typeNameLabel">RelOptSamplingParameters</span>
 extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
 <div class="block">RelOptSamplingParameters represents the parameters necessary to produce a
  sample of a relation.

  <p>It's parameters are derived from the SQL 2003 TABLESAMPLE clause.</div>
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 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(boolean,float,boolean,int)">RelOptSamplingParameters</a></span>&#8203;(boolean&nbsp;isBernoulli,
 float&nbsp;samplingPercentage,
 boolean&nbsp;isRepeatable,
 int&nbsp;repeatableSeed)</code></th>
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 <td class="colFirst"><code>int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRepeatableSeed()">getRepeatableSeed</a></span>()</code></th>
 <td class="colLast">
 <div class="block">If <a href="#isRepeatable()"><code>isRepeatable()</code></a> returns <code>true</code>, this method returns a
  user-specified seed value.</div>
 </td>
 </tr>
 <tr class="rowColor" id="i1">
 <td class="colFirst"><code>float</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSamplingPercentage()">getSamplingPercentage</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the sampling percentage.</div>
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 <td class="colFirst"><code>boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBernoulli()">isBernoulli</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Indicates whether Bernoulli or system sampling should be performed.</div>
 </td>
 </tr>
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 <td class="colFirst"><code>boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isRepeatable()">isRepeatable</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Indicates whether the sample results should be repeatable.</div>
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 <h3><a id="&lt;init&gt;(boolean,float,boolean,int)">RelOptSamplingParameters</a></h3>
 <div class="memberSignature"><span class="modifiers">public</span>&nbsp;<span class="memberName">RelOptSamplingParameters</span>&#8203;(<span class="arguments">boolean&nbsp;isBernoulli,
 float&nbsp;samplingPercentage,
 boolean&nbsp;isRepeatable,
 int&nbsp;repeatableSeed)</span></div>
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 <h3><a id="isBernoulli()">isBernoulli</a></h3>
 <div class="memberSignature"><span class="modifiers">public</span>&nbsp;<span class="returnType">boolean</span>&nbsp;<span class="memberName">isBernoulli</span>()</div>
 <div class="block">Indicates whether Bernoulli or system sampling should be performed.
  Bernoulli sampling requires the decision whether to include each row in
  the the sample to be independent across rows. System sampling allows
  implementation-dependent behavior.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if Bernoulli sampling is configured, false for system
  sampling</dd>
 </dl>
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 <h3><a id="getSamplingPercentage()">getSamplingPercentage</a></h3>
 <div class="memberSignature"><span class="modifiers">public</span>&nbsp;<span class="returnType">float</span>&nbsp;<span class="memberName">getSamplingPercentage</span>()</div>
 <div class="block">Returns the sampling percentage. For Bernoulli sampling, the sampling
  percentage is the likelihood that any given row will be included in the
  sample. For system sampling, the sampling percentage indicates (roughly)
  what percentage of the rows will appear in the sample.</div>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the sampling percentage between 0.0 and 1.0, exclusive</dd>
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 <h3><a id="isRepeatable()">isRepeatable</a></h3>
 <div class="memberSignature"><span class="modifiers">public</span>&nbsp;<span class="returnType">boolean</span>&nbsp;<span class="memberName">isRepeatable</span>()</div>
 <div class="block">Indicates whether the sample results should be repeatable. Sample results
  are only required to repeat if no changes have been made to the
  relation's content or structure. If the sample is configured to be
  repeatable, then a user-specified seed value can be obtained via
  <a href="#getRepeatableSeed()"><code>getRepeatableSeed()</code></a>.</div>
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 <dd>true if the sample results should be repeatable</dd>
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 <h3><a id="getRepeatableSeed()">getRepeatableSeed</a></h3>
 <div class="memberSignature"><span class="modifiers">public</span>&nbsp;<span class="returnType">int</span>&nbsp;<span class="memberName">getRepeatableSeed</span>()</div>
 <div class="block">If <a href="#isRepeatable()"><code>isRepeatable()</code></a> returns <code>true</code>, this method returns a
  user-specified seed value. Samples of the same, unmodified relation
  should be identical if the sampling mode, sampling percentage and
  repeatable seed are the same.</div>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>seed value for repeatable samples</dd>
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	<h1 title="Class RelOptSamplingParameters" class="title">Class RelOptSamplingParameters</h1>
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	<pre>public class <span class="typeNameLabel">RelOptSamplingParameters</span>
	extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
	<div class="block">RelOptSamplingParameters represents the parameters necessary to produce a
	sample of a relation.

	<p>It's parameters are derived from the SQL 2003 TABLESAMPLE clause.</div>
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	<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(boolean,float,boolean,int)">RelOptSamplingParameters</a></span>(boolean isBernoulli,
	float samplingPercentage,
	boolean isRepeatable,
	int repeatableSeed)</code></th>
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	<td class="colFirst"><code>int</code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRepeatableSeed()">getRepeatableSeed</a></span>()</code></th>
	<td class="colLast">
	<div class="block">If <a href="#isRepeatable()"><code>isRepeatable()</code></a> returns <code>true</code>, this method returns a
	user-specified seed value.</div>
	</td>
	</tr>
	<tr class="rowColor" id="i1">
	<td class="colFirst"><code>float</code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSamplingPercentage()">getSamplingPercentage</a></span>()</code></th>
	<td class="colLast">
	<div class="block">Returns the sampling percentage.</div>
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	<td class="colFirst"><code>boolean</code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBernoulli()">isBernoulli</a></span>()</code></th>
	<td class="colLast">
	<div class="block">Indicates whether Bernoulli or system sampling should be performed.</div>
	</td>
	</tr>
	<tr class="rowColor" id="i3">
	<td class="colFirst"><code>boolean</code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isRepeatable()">isRepeatable</a></span>()</code></th>
	<td class="colLast">
	<div class="block">Indicates whether the sample results should be repeatable.</div>
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	<h3><a id="<init>(boolean,float,boolean,int)">RelOptSamplingParameters</a></h3>
	<div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">RelOptSamplingParameters</span>(<span class="arguments">boolean isBernoulli,
	float samplingPercentage,
	boolean isRepeatable,
	int repeatableSeed)</span></div>
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	<h3><a id="isBernoulli()">isBernoulli</a></h3>
	<div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">boolean</span> <span class="memberName">isBernoulli</span>()</div>
	<div class="block">Indicates whether Bernoulli or system sampling should be performed.
	Bernoulli sampling requires the decision whether to include each row in
	the the sample to be independent across rows. System sampling allows
	implementation-dependent behavior.</div>
	<dl>
	<dt><span class="returnLabel">Returns:</span></dt>
	<dd>true if Bernoulli sampling is configured, false for system
	sampling</dd>
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	<h3><a id="getSamplingPercentage()">getSamplingPercentage</a></h3>
	<div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">float</span> <span class="memberName">getSamplingPercentage</span>()</div>
	<div class="block">Returns the sampling percentage. For Bernoulli sampling, the sampling
	percentage is the likelihood that any given row will be included in the
	sample. For system sampling, the sampling percentage indicates (roughly)
	what percentage of the rows will appear in the sample.</div>
	<dl>
	<dt><span class="returnLabel">Returns:</span></dt>
	<dd>the sampling percentage between 0.0 and 1.0, exclusive</dd>
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	<h3><a id="isRepeatable()">isRepeatable</a></h3>
	<div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">boolean</span> <span class="memberName">isRepeatable</span>()</div>
	<div class="block">Indicates whether the sample results should be repeatable. Sample results
	are only required to repeat if no changes have been made to the
	relation's content or structure. If the sample is configured to be
	repeatable, then a user-specified seed value can be obtained via
	<a href="#getRepeatableSeed()"><code>getRepeatableSeed()</code></a>.</div>
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	<dd>true if the sample results should be repeatable</dd>
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	<h3><a id="getRepeatableSeed()">getRepeatableSeed</a></h3>
	<div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">int</span> <span class="memberName">getRepeatableSeed</span>()</div>
	<div class="block">If <a href="#isRepeatable()"><code>isRepeatable()</code></a> returns <code>true</code>, this method returns a
	user-specified seed value. Samples of the same, unmodified relation
	should be identical if the sampling mode, sampling percentage and
	repeatable seed are the same.</div>
	<dl>
	<dt><span class="returnLabel">Returns:</span></dt>
	<dd>seed value for repeatable samples</dd>
	</dl>
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