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| <div class="subTitle">org.apache.beam.sdk.io.snowflake</div> |
| <h2 title="Class SnowflakeIO" class="title">Class SnowflakeIO</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.beam.sdk.io.snowflake.SnowflakeIO</li> |
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| <pre><a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.html" title="annotation in org.apache.beam.sdk.annotations">@Experimental</a> |
| public class <span class="typeNameLabel">SnowflakeIO</span> |
| extends java.lang.Object</pre> |
| <div class="block">IO to read and write data on Snowflake. |
| |
| <p>SnowflakeIO uses <a href="https://docs.snowflake.net/manuals/user-guide/jdbc.html">Snowflake |
| JDBC</a> driver under the hood, but data isn't read/written using JDBC directly. Instead, |
| SnowflakeIO uses dedicated <b>COPY</b> operations to read/write data from/to a cloud bucket. By |
| now only Google Cloud Storage is supported. |
| |
| <p>To configure SnowflakeIO to read/write from your Snowflake instance, you have to provide a |
| <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html" title="class in org.apache.beam.sdk.io.snowflake"><code>SnowflakeIO.DataSourceConfiguration</code></a> using <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#create--"><code>SnowflakeIO.DataSourceConfiguration.create()</code></a>. Additionally one |
| of <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withServerName-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withServerName(String)</code></a> or <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withUrl-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withUrl(String)</code></a> must be used to tell SnowflakeIO which instance to use. |
| <br> |
| There are also other options available to configure connection to Snowflake: |
| |
| <ul> |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withWarehouse-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withWarehouse(String)</code></a> to specify which Warehouse to use |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withDatabase-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withDatabase(String)</code></a> to specify which Database to connect |
| to |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withSchema-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withSchema(String)</code></a> to specify which schema to use |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withRole-java.lang.String-"><code>SnowflakeIO.DataSourceConfiguration.withRole(String)</code></a> to specify which role to use |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withLoginTimeout-java.lang.Integer-"><code>SnowflakeIO.DataSourceConfiguration.withLoginTimeout(Integer)</code></a> to specify the timeout for the |
| login |
| <li><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html#withPortNumber-java.lang.Integer-"><code>SnowflakeIO.DataSourceConfiguration.withPortNumber(Integer)</code></a> to specify custom port of Snowflake |
| instance |
| </ul> |
| |
| <p>For example: |
| |
| <pre><code> |
| SnowflakeIO.DataSourceConfiguration dataSourceConfiguration = |
| SnowflakeIO.DataSourceConfiguration.create() |
| .withUsernamePasswordAuth(username, password) |
| .withServerName(options.getServerName()) |
| .withWarehouse(options.getWarehouse()) |
| .withDatabase(options.getDatabase()) |
| .withSchema(options.getSchema()); |
| </code></pre> |
| |
| <h3>Reading from Snowflake</h3> |
| |
| <p>SnowflakeIO.Read returns a bounded collection of <code>T</code> as a <code>PCollection<T></code>. T is |
| the type returned by the provided <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.CsvMapper.html" title="interface in org.apache.beam.sdk.io.snowflake"><code>SnowflakeIO.CsvMapper</code></a>. |
| |
| <p>For example |
| |
| <pre><code> |
| PCollection<GenericRecord> items = pipeline.apply( |
| SnowflakeIO.<GenericRecord>read() |
| .withDataSourceConfiguration(dataSourceConfiguration) |
| .fromQuery(QUERY) |
| .withStagingBucketName(...) |
| .withStorageIntegrationName(...) |
| .withCsvMapper(...) |
| .withCoder(...)); |
| </code></pre> |
| |
| <p><b>Important</b> When reading data from Snowflake, temporary CSV files are created on the |
| specified stagingBucketName in directory named `sf_copy_csv_[RANDOM CHARS]_[TIMESTAMP]`. This |
| directory and all the files are cleaned up automatically by default, but in case of failed |
| pipeline they may remain and will have to be cleaned up manually. |
| |
| <h3>Writing to Snowflake</h3> |
| |
| <p>SnowflakeIO.Write supports writing records into a database. It writes a <a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> to |
| the database by converting each T into a <code>Object[]</code> via a user-provided <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.UserDataMapper.html" title="interface in org.apache.beam.sdk.io.snowflake"><code>SnowflakeIO.UserDataMapper</code></a>. |
| |
| <p>For example |
| |
| <pre><code> |
| items.apply( |
| SnowflakeIO.<KV<Integer, String>>write() |
| .withDataSourceConfiguration(dataSourceConfiguration) |
| .withStagingBucketName(...) |
| .withStorageIntegrationName(...) |
| .withUserDataMapper(maper) |
| .to(table); |
| </code></pre> |
| |
| <p><b>Important</b> When writing data to Snowflake, firstly data will be saved as CSV files on |
| specified stagingBucketName in directory named 'data' and then into Snowflake.</div> |
| </li> |
| </ul> |
| </div> |
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| <ul class="blockList"> |
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| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Concatenate.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Concatenate</a></span></code> |
| <div class="block">Combines list of <code>String</code> to provide one <code>String</code> with paths where files were |
| staged for write.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.CsvMapper.html" title="interface in org.apache.beam.sdk.io.snowflake">SnowflakeIO.CsvMapper</a><<a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.CsvMapper.html" title="type parameter in SnowflakeIO.CsvMapper">T</a>></span></code> |
| <div class="block">Interface for user-defined function mapping parts of CSV line into T.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.DataSourceConfiguration</a></span></code> |
| <div class="block">A POJO describing a <code>DataSource</code>, providing all properties allowing to create a <code>DataSource</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceProviderFromDataSourceConfiguration.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.DataSourceProviderFromDataSourceConfiguration</a></span></code> |
| <div class="block">Wraps <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.DataSourceConfiguration.html" title="class in org.apache.beam.sdk.io.snowflake"><code>SnowflakeIO.DataSourceConfiguration</code></a> to provide DataSource.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Read</a><<a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="type parameter in SnowflakeIO.Read">T</a>></span></code> |
| <div class="block">Implementation of <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#read--"><code>read()</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.UserDataMapper.html" title="interface in org.apache.beam.sdk.io.snowflake">SnowflakeIO.UserDataMapper</a><<a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.UserDataMapper.html" title="type parameter in SnowflakeIO.UserDataMapper">T</a>></span></code> |
| <div class="block">Interface for user-defined function mapping T into array of Objects.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Write.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Write</a><<a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Write.html" title="type parameter in SnowflakeIO.Write">T</a>></span></code> |
| <div class="block">Implementation of <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#write--"><code>write()</code></a>.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#SnowflakeIO--">SnowflakeIO</a></span>()</code> </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Read</a><T></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#read--">read</a></span>()</code> |
| <div class="block">Read data from Snowflake via COPY statement using default <a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeBatchServiceImpl.html" title="class in org.apache.beam.sdk.io.snowflake.services"><code>SnowflakeBatchServiceImpl</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Read</a><T></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#read-org.apache.beam.sdk.io.snowflake.services.SnowflakeService-">read</a></span>(<a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeService.html" title="interface in org.apache.beam.sdk.io.snowflake.services">SnowflakeService</a> snowflakeService)</code> |
| <div class="block">Read data from Snowflake via COPY statement using user-defined <a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeService.html" title="interface in org.apache.beam.sdk.io.snowflake.services"><code>SnowflakeService</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Write.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Write</a><T></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.html#write--">write</a></span>()</code> |
| <div class="block">Write data to Snowflake via COPY statement.</div> |
| </td> |
| </tr> |
| </table> |
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| <!-- --> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
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| <a name="SnowflakeIO--"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>SnowflakeIO</h4> |
| <pre>public SnowflakeIO()</pre> |
| </li> |
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| <a name="read-org.apache.beam.sdk.io.snowflake.services.SnowflakeService-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>read</h4> |
| <pre>public static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Read</a><T> read(<a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeService.html" title="interface in org.apache.beam.sdk.io.snowflake.services">SnowflakeService</a> snowflakeService)</pre> |
| <div class="block">Read data from Snowflake via COPY statement using user-defined <a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeService.html" title="interface in org.apache.beam.sdk.io.snowflake.services"><code>SnowflakeService</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - Type of the data to be read.</dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>snowflakeService</code> - user-defined <a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeService.html" title="interface in org.apache.beam.sdk.io.snowflake.services"><code>SnowflakeService</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="read--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>read</h4> |
| <pre>public static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Read.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Read</a><T> read()</pre> |
| <div class="block">Read data from Snowflake via COPY statement using default <a href="../../../../../../org/apache/beam/sdk/io/snowflake/services/SnowflakeBatchServiceImpl.html" title="class in org.apache.beam.sdk.io.snowflake.services"><code>SnowflakeBatchServiceImpl</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - Type of the data to be read.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="write--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>write</h4> |
| <pre>public static <T> <a href="../../../../../../org/apache/beam/sdk/io/snowflake/SnowflakeIO.Write.html" title="class in org.apache.beam.sdk.io.snowflake">SnowflakeIO.Write</a><T> write()</pre> |
| <div class="block">Write data to Snowflake via COPY statement.</div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - Type of data to be written.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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