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| <h2 title="Class Sets" class="title">Class Sets</h2> |
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| <pre>public class <span class="typeNameLabel">Sets</span> |
| extends java.lang.Object</pre> |
| <div class="block">The <code>PTransform</code>s that allow to compute different set functions across <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>s. |
| |
| <p>They come in two variants. 1. Between two <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> 2. Between two or more <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> in a <a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values"><code>PCollectionList</code></a>. |
| |
| <p>Following <code>PTransform</code>s follows SET DISTINCT semantics: intersectDistinct, |
| expectDistinct, unionDistinct |
| |
| <p>Following <code>PTransform</code>s follows SET ALL semantics: intersectAll, expectAll, unionAll |
| |
| <p>For example, the following demonstrates intersectDistinct between two collections <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>s. |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "2", "3", "3", "4", "5")); |
| PCollection<String> right = p.apply(Create.of("1", "3", "4", "4", "6")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.intersectDistinct(right)); // results will be PCollection<String> containing: "1","3","4" |
| |
| </code></pre> |
| |
| <p>For example, the following demonstrates intersectDistinct between three collections <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>s in a <a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values"><code>PCollectionList</code></a>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> first = p.apply(Create.of("1", "2", "3", "3", "4", "5")); |
| PCollection<String> second = p.apply(Create.of("1", "3", "4", "4", "6")); |
| PCollection<String> third = p.apply(Create.of("3", "4", "4")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.intersectDistinct()); // results will be PCollection<String> containing: "3","4" |
| |
| </code></pre></div> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#Sets--">Sets</a></span>()</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </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 <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#exceptAll--">exceptAll</a></span>()</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the difference |
| all (exceptAll) of collections done in order for all collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#exceptAll-org.apache.beam.sdk.values.PCollection-">exceptAll</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| difference all (exceptAll) with provided <code>PCollection<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#exceptDistinct--">exceptDistinct</a></span>()</code> |
| <div class="block">Returns a <code>PTransform</code> that takes a <code>PCollectionList<PCollection<T>></code> and returns a |
| <code>PCollection<T></code> containing the difference (except) of collections done in order for all |
| collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#exceptDistinct-org.apache.beam.sdk.values.PCollection-">exceptDistinct</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| difference (except) with provided <code>PCollection<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#intersectAll--">intersectAll</a></span>()</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| intersection all of collections done in order for all collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#intersectAll-org.apache.beam.sdk.values.PCollection-">intersectAll</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| intersection with provided <code>PCollection<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#intersectDistinct--">intersectDistinct</a></span>()</code> |
| <div class="block">Returns a <code>PTransform</code> that takes a <code>PCollectionList<PCollection<T>></code> and returns a |
| <code>PCollection<T></code> containing the intersection of collections done in order for all |
| collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#intersectDistinct-org.apache.beam.sdk.values.PCollection-">intersectDistinct</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| intersection with provided <code>PCollection<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/Flatten.PCollections.html" title="class in org.apache.beam.sdk.transforms">Flatten.PCollections</a><T></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#unionAll--">unionAll</a></span>()</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the unionAll |
| of collections done in order for all collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#unionAll-org.apache.beam.sdk.values.PCollection-">unionAll</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| unionAll with provided <code>PCollection<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#unionDistinct--">unionDistinct</a></span>()</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics which takes a |
| <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| union of collections done in order for all collections in <code>PCollectionList<T></code>.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Sets.html#unionDistinct-org.apache.beam.sdk.values.PCollection-">unionDistinct</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</code> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| union with provided <code>PCollection<T></code>.</div> |
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| </ul> |
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| <h4>Sets</h4> |
| <pre>public Sets()</pre> |
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| <h4>intersectDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> intersectDistinct(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| intersection with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will all distinct elements that present in |
| both pipeline is constructed and provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>). Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "2", "3", "3", "4", "5")); |
| PCollection<String> right = p.apply(Create.of("1", "3", "4", "4", "6")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.intersectDistinct(right)); // results will be PCollection<String> containing: "1","3","4" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="intersectDistinct--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>intersectDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> intersectDistinct()</pre> |
| <div class="block">Returns a <code>PTransform</code> that takes a <code>PCollectionList<PCollection<T>></code> and returns a |
| <code>PCollection<T></code> containing the intersection of collections done in order for all |
| collections in <code>PCollectionList<T></code>. |
| |
| <p>Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics which takes a |
| <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| intersection of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will have all distinct elements that are |
| present in both pipeline is constructed and next <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> in the list and applied to |
| all collections in order. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> first = p.apply(Create.of("1", "2", "3", "3", "4", "5")); |
| PCollection<String> second = p.apply(Create.of("1", "3", "4", "4", "6")); |
| PCollection<String> third = p.apply(Create.of("3", "4", "4")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.intersectDistinct()); // results will be PCollection<String> containing: "3","4" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="intersectAll-org.apache.beam.sdk.values.PCollection-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>intersectAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> intersectAll(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| intersection with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow INTESECT_ALL Semantics as |
| follows: Given there are m elements on pipeline which is constructed <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) |
| and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will output MIN(m - n, 0) |
| elements of left for all elements which are present in both left and right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "1", "1", "2", "3", "3", "4", "5")); |
| PCollection<String> right = p.apply(Create.of("1", "1", "3", "4", "4", "6")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.intersectAll(right)); // results will be PCollection<String> containing: "1","1","3","4" |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="intersectAll--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>intersectAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> intersectAll()</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| intersection all of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow INTERSECT_ALL semantics. |
| Output is calculated as follows: Given there are m elements on pipeline which is constructed |
| <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will |
| output MIN(m - n, 0) elements of left for all elements which are present in both left and |
| right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| PCollection<String> first = p.apply(Create.of("1", "1", "1", "2", "3", "3", "4", "5")); |
| PCollection<String> second = p.apply(Create.of("1", "1", "3", "4", "4", "6")); |
| PCollection<String> third = p.apply(Create.of("1", "5")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.intersectAll()); // results will be PCollection<String> containing: "1" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="exceptDistinct-org.apache.beam.sdk.values.PCollection-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>exceptDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> exceptDistinct(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| difference (except) with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will all distinct elements that present in |
| pipeline is constructed but not present in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "1", "1", "2", "3", "3","4", "5")); |
| PCollection<String> right = p.apply(Create.of("1", "1", "3", "4", "4", "6")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.exceptDistinct(right)); // results will be PCollection<String> containing: "2","5" |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="exceptDistinct--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>exceptDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> exceptDistinct()</pre> |
| <div class="block">Returns a <code>PTransform</code> that takes a <code>PCollectionList<PCollection<T>></code> and returns a |
| <code>PCollection<T></code> containing the difference (except) of collections done in order for all |
| collections in <code>PCollectionList<T></code>. |
| |
| <p>Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics which takes a |
| <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| difference (except) of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will have all distinct elements that are |
| present in pipeline is constructed but not present in next <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> in the list and |
| applied to all collections in order. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| PCollection<String> first = p.apply(Create.of("1", "1", "1", "2", "3", "3", "4", "5")); |
| PCollection<String> second = p.apply(Create.of("1", "1", "3", "4", "4", "6")); |
| |
| PCollection<String> third = p.apply(Create.of("1", "2", "2")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.exceptDistinct()); // results will be PCollection<String> containing: "5" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="exceptAll-org.apache.beam.sdk.values.PCollection-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>exceptAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> exceptAll(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| difference all (exceptAll) with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow EXCEPT_ALL Semantics as |
| follows: Given there are m elements on pipeline which is constructed <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) |
| and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will output m elements of left |
| for all elements which are present in left but not in right. - it will output MAX(m - n, 0) |
| elements of left for all elements which are present in both left and right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "1", "1", "2", "3", "3", "3", "4", "5")); |
| PCollection<String> right = p.apply(Create.of("1", "3", "4", "4", "6")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.exceptAll(right)); // results will be PCollection<String> containing: "1","1","2","3","3","5" |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="exceptAll--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>exceptAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> exceptAll()</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the difference |
| all (exceptAll) of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow EXCEPT_ALL semantics. |
| Output is calculated as follows: Given there are m elements on pipeline which is constructed |
| <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will |
| output m elements of left for all elements which are present in left but not in right. - it |
| will output MAX(m - n, 0) elements of left for all elements which are present in both left and |
| right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| PCollection<String> first = p.apply(Create.of("1", "1", "1", "2", "3", "3", "3", "4", "5")); |
| PCollection<String> second = p.apply(Create.of("1", "3", "4", "4", "6")); |
| PCollection<String> third = p.apply(Create.of("1", "5")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.exceptAll()); // results will be PCollection<String> containing: "1","2","3","3" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unionDistinct-org.apache.beam.sdk.values.PCollection-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>unionDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> unionDistinct(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics to compute the |
| union with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will all distinct elements that present in |
| pipeline is constructed or present in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "1", "2")); |
| PCollection<String> right = p.apply(Create.of("1", "3", "4", "4")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.unionDistinct(right)); // results will be PCollection<String> containing: "1","2","3","4" |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unionDistinct--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>unionDistinct</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionList.html" title="class in org.apache.beam.sdk.values">PCollectionList</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> unionDistinct()</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET DISTINCT semantics which takes a |
| <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the |
| union of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> will have all distinct elements that are |
| present in pipeline is constructed or present in next <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> in the list and |
| applied to all collections in order. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| PCollection<String> first = p.apply(Create.of("1", "1", "2")); |
| PCollection<String> second = p.apply(Create.of("1", "3", "4", "4")); |
| |
| PCollection<String> third = p.apply(Create.of("1", "5")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.unionDistinct()); // results will be PCollection<String> containing: "1","2","3","4","5" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unionAll-org.apache.beam.sdk.values.PCollection-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>unionAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a><<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T>> unionAll(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a><T> rightCollection)</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics to compute the |
| unionAll with provided <code>PCollection<T></code>. |
| |
| <p>The argument should not be modified after this is called. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow UNION_ALL semantics as |
| follows: Given there are m elements on pipeline which is constructed <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) |
| and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will output m elements of left |
| and m elements of right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all <code>PCollection<T></code> |
| to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the collection <code>Coder</code> |
| is not deterministic, an exception is thrown at pipeline construction time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the input <code>PCollection<T></code> |
| |
| <pre><code> |
| Pipeline p = ...; |
| |
| PCollection<String> left = p.apply(Create.of("1", "1", "2")); |
| PCollection<String> right = p.apply(Create.of("1", "3", "4", "4")); |
| |
| PCollection<String> results = |
| left.apply(SetFns.unionAll(right)); // results will be PCollection<String> containing: "1","1","1","2","3","4","4" |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unionAll--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>unionAll</h4> |
| <pre>public static <T> <a href="../../../../../org/apache/beam/sdk/transforms/Flatten.PCollections.html" title="class in org.apache.beam.sdk.transforms">Flatten.PCollections</a><T> unionAll()</pre> |
| <div class="block">Returns a new <code>PTransform</code> transform that follows SET ALL semantics which takes a <code>PCollectionList<PCollection<T>></code> and returns a <code>PCollection<T></code> containing the unionAll |
| of collections done in order for all collections in <code>PCollectionList<T></code>. |
| |
| <p>The elements of the output <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> which will follow UNION_ALL semantics. Output |
| is calculated as follows: Given there are m elements on pipeline which is constructed <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (left) and n elements on in provided <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> (right): - it will output |
| m elements of left and m elements of right. |
| |
| <p>Note that this transform requires that the <code>Coder</code> of the all inputs <code>PCollection<T></code> to be deterministic (see <a href="../../../../../org/apache/beam/sdk/coders/Coder.html#verifyDeterministic--"><code>Coder.verifyDeterministic()</code></a>). If the |
| collection <code>Coder</code> is not deterministic, an exception is thrown at pipeline construction |
| time. |
| |
| <p>All inputs must have equal <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a>s and compatible triggers (see <a href="../../../../../org/apache/beam/sdk/transforms/windowing/Trigger.html#isCompatible-org.apache.beam.sdk.transforms.windowing.Trigger-"><code>Trigger.isCompatible(Trigger)</code></a>).Triggers with multiple firings may lead to nondeterministic |
| results since the this <code>PTransform</code> is only computed over each individual firing. |
| |
| <p>By default, the output <code>PCollection<T></code> encodes its elements using the same <code>Coder</code> as that of the first <code>PCollection<T></code> in <code>PCollectionList<T></code>. |
| |
| <pre><code> |
| Pipeline p = ...; |
| PCollection<String> first = p.apply(Create.of("1", "1", "2")); |
| PCollection<String> second = p.apply(Create.of("1", "3", "4", "4")); |
| PCollection<String> third = p.apply(Create.of("1", "5")); |
| |
| // Following example will perform (first intersect second) intersect third. |
| PCollection<String> results = |
| PCollectionList.of(first).and(second).and(third) |
| .apply(SetFns.unionAll()); // results will be PCollection<String> containing: "1","1","1","1","2","3","4","4","5" |
| |
| </code></pre></div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of the elements in the input <code>PCollectionList<T></code> and output <code>PCollection<T></code>s.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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