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| <div class="section" id="module-apache_beam.io.snowflake"> |
| <span id="apache-beam-io-snowflake-module"></span><h1>apache_beam.io.snowflake module<a class="headerlink" href="#module-apache_beam.io.snowflake" title="Permalink to this headline">¶</a></h1> |
| <p>Snowflake transforms tested against Flink portable runner.</p> |
| <p><strong>Setup</strong></p> |
| <p>Transforms provided in this module are cross-language transforms |
| implemented in the Beam Java SDK. During the pipeline construction, Python SDK |
| will connect to a Java expansion service to expand these transforms. |
| To facilitate this, a small amount of setup is needed before using these |
| transforms in a Beam Python pipeline.</p> |
| <p>There are several ways to setup cross-language Snowflake transforms.</p> |
| <ul class="simple"> |
| <li>Option 1: use the default expansion service</li> |
| <li>Option 2: specify a custom expansion service</li> |
| </ul> |
| <p>See below for details regarding each of these options.</p> |
| <p><em>Option 1: Use the default expansion service</em></p> |
| <p>This is the recommended and easiest setup option for using Python Snowflake |
| transforms.This option requires following pre-requisites |
| before running the Beam pipeline.</p> |
| <ul class="simple"> |
| <li>Install Java runtime in the computer from where the pipeline is constructed |
| and make sure that ‘java’ command is available.</li> |
| </ul> |
| <p>In this option, Python SDK will either download (for released Beam version) or |
| build (when running from a Beam Git clone) a expansion service jar and use |
| that to expand transforms. Currently Snowflake transforms use the |
| ‘beam-sdks-java-io-snowflake-expansion-service’ jar for this purpose.</p> |
| <p><em>Option 2: specify a custom expansion service</em></p> |
| <p>In this option, you startup your own expansion service and provide that as |
| a parameter when using the transforms provided in this module.</p> |
| <p>This option requires following pre-requisites before running the Beam |
| pipeline.</p> |
| <ul class="simple"> |
| <li>Startup your own expansion service.</li> |
| <li>Update your pipeline to provide the expansion service address when |
| initiating Snowflake transforms provided in this module.</li> |
| </ul> |
| <p>Flink Users can use the built-in Expansion Service of the Flink Runner’s |
| Job Server. If you start Flink’s Job Server, the expansion service will be |
| started on port 8097. For a different address, please set the |
| expansion_service parameter.</p> |
| <p><strong>More information</strong></p> |
| <p>For more information regarding cross-language transforms see: |
| - <a class="reference external" href="https://beam.apache.org/roadmap/portability/">https://beam.apache.org/roadmap/portability/</a></p> |
| <p>For more information specific to Flink runner see: |
| - <a class="reference external" href="https://beam.apache.org/documentation/runners/flink/">https://beam.apache.org/documentation/runners/flink/</a></p> |
| <dl class="class"> |
| <dt id="apache_beam.io.snowflake.ReadFromSnowflake"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.snowflake.</code><code class="descname">ReadFromSnowflake</code><span class="sig-paren">(</span><em>server_name</em>, <em>schema</em>, <em>database</em>, <em>staging_bucket_name</em>, <em>storage_integration_name</em>, <em>csv_mapper</em>, <em>username=None</em>, <em>password=None</em>, <em>private_key_path=None</em>, <em>raw_private_key=None</em>, <em>private_key_passphrase=None</em>, <em>o_auth_token=None</em>, <em>table=None</em>, <em>query=None</em>, <em>role=None</em>, <em>warehouse=None</em>, <em>expansion_service=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#ReadFromSnowflake"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.ReadFromSnowflake" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p> |
| <p>An external PTransform which reads from Snowflake.</p> |
| <p>Initializes a read operation from Snowflake.</p> |
| <p>Required parameters:</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>server_name</strong> – full Snowflake server name with the following format |
| <a class="reference external" href="https://account.region.gcp.snowflakecomputing.com">https://account.region.gcp.snowflakecomputing.com</a>.</li> |
| <li><strong>schema</strong> – name of the Snowflake schema in the database to use.</li> |
| <li><strong>database</strong> – name of the Snowflake database to use.</li> |
| <li><strong>staging_bucket_name</strong> – name of the Google Cloud Storage bucket. |
| Bucket will be used as a temporary location for storing CSV files. |
| Those temporary directories will be named |
| ‘sf_copy_csv_DATE_TIME_RANDOMSUFFIX’ |
| and they will be removed automatically once Read operation finishes.</li> |
| <li><strong>storage_integration_name</strong> – is the name of storage integration |
| object created according to Snowflake documentation.</li> |
| <li><strong>csv_mapper</strong> – specifies a function which must translate |
| user-defined object to array of strings. |
| SnowflakeIO uses a COPY INTO <location> statement to move data from |
| a Snowflake table to Google Cloud Storage as CSV files.These files |
| are then downloaded via FileIO and processed line by line. |
| Each line is split into an array of Strings using the OpenCSV |
| The csv_mapper function job is to give the user the possibility to |
| convert the array of Strings to a user-defined type, |
| ie. GenericRecord for Avro or Parquet files, or custom objects. |
| Example: |
| def csv_mapper(strings_array) |
| return User(strings_array[0], int(strings_array[1])))</li> |
| <li><strong>table</strong> – specifies a Snowflake table name.</li> |
| <li><strong>query</strong> – specifies a Snowflake custom SQL query.</li> |
| <li><strong>role</strong> – specifies a Snowflake role.</li> |
| <li><strong>warehouse</strong> – specifies a Snowflake warehouse name.</li> |
| <li><strong>expansion_service</strong> – specifies URL of expansion service.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Authentication parameters:</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>username</strong> – specifies username for |
| username/password authentication method.</li> |
| <li><strong>password</strong> – specifies password for |
| username/password authentication method.</li> |
| <li><strong>private_key_path</strong> – specifies a private key file for |
| key/ pair authentication method.</li> |
| <li><strong>raw_private_key</strong> – specifies a private key for |
| key/ pair authentication method.</li> |
| <li><strong>private_key_passphrase</strong> – specifies password for |
| key/ pair authentication method.</li> |
| <li><strong>o_auth_token</strong> – specifies access token for |
| OAuth authentication method.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.ReadFromSnowflake.URN"> |
| <code class="descname">URN</code><em class="property"> = 'beam:transform:org.apache.beam:snowflake_read:v1'</em><a class="headerlink" href="#apache_beam.io.snowflake.ReadFromSnowflake.URN" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.io.snowflake.ReadFromSnowflake.expand"> |
| <code class="descname">expand</code><span class="sig-paren">(</span><em>pbegin</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#ReadFromSnowflake.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.ReadFromSnowflake.expand" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.snowflake.WriteToSnowflake"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.snowflake.</code><code class="descname">WriteToSnowflake</code><span class="sig-paren">(</span><em>server_name</em>, <em>schema</em>, <em>database</em>, <em>staging_bucket_name</em>, <em>storage_integration_name</em>, <em>create_disposition</em>, <em>write_disposition</em>, <em>table_schema</em>, <em>user_data_mapper</em>, <em>username=None</em>, <em>password=None</em>, <em>private_key_path=None</em>, <em>raw_private_key=None</em>, <em>private_key_passphrase=None</em>, <em>o_auth_token=None</em>, <em>table=None</em>, <em>query=None</em>, <em>role=None</em>, <em>warehouse=None</em>, <em>expansion_service=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#WriteToSnowflake"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.WriteToSnowflake" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p> |
| <p>An external PTransform which writes to Snowflake.</p> |
| <p>Initializes a write operation to Snowflake.</p> |
| <p>Required parameters:</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>server_name</strong> – full Snowflake server name with the following format |
| <a class="reference external" href="https://account.region.gcp.snowflakecomputing.com">https://account.region.gcp.snowflakecomputing.com</a>.</li> |
| <li><strong>schema</strong> – name of the Snowflake schema in the database to use.</li> |
| <li><strong>database</strong> – name of the Snowflake database to use.</li> |
| <li><strong>staging_bucket_name</strong> – name of the Google Cloud Storage bucket. |
| Bucket will be used as a temporary location for storing CSV files.</li> |
| <li><strong>storage_integration_name</strong> – is the name of a Snowflake storage |
| integration object created according to Snowflake documentation for the |
| GCS bucket.</li> |
| <li><strong>user_data_mapper</strong> – specifies a function which maps data from |
| a PCollection to an array of String values before the write operation |
| saves the data to temporary .csv files. |
| Example: |
| def user_data_mapper(user): |
| return [user.name, str(user.age)]</li> |
| <li><strong>table</strong> – specifies a Snowflake table name</li> |
| <li><strong>query</strong> – specifies a custom SQL query</li> |
| <li><strong>role</strong> – specifies a Snowflake role.</li> |
| <li><strong>warehouse</strong> – specifies a Snowflake warehouse name.</li> |
| <li><strong>expansion_service</strong> – specifies URL of expansion service.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Authentication parameters:</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>username</strong> – specifies username for |
| username/password authentication method.</li> |
| <li><strong>password</strong> – specifies password for |
| username/password authentication method.</li> |
| <li><strong>private_key_path</strong> – specifies a private key file for |
| key/ pair authentication method.</li> |
| <li><strong>raw_private_key</strong> – specifies a private key for |
| key/ pair authentication method.</li> |
| <li><strong>private_key_passphrase</strong> – specifies password for |
| key/ pair authentication method.</li> |
| <li><strong>o_auth_token</strong> – specifies access token for |
| OAuth authentication method.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Additional parameters:</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>create_disposition</strong> – Defines the behaviour of the write operation if |
| the target table does not exist. The following values are supported: |
| CREATE_IF_NEEDED - default behaviour. The write operation checks whether |
| the specified target table exists; if it does not, the write operation |
| attempts to create the table Specify the schema for the target table |
| using the table_schema parameter. |
| CREATE_NEVER - The write operation fails if the target table does not |
| exist.</li> |
| <li><strong>write_disposition</strong> – Defines the write behaviour based on the table |
| where data will be written to. The following values are supported: |
| APPEND - Default behaviour. Written data is added to the existing rows |
| in the table, |
| EMPTY - The target table must be empty; otherwise, the write operation |
| fails, |
| TRUNCATE - The write operation deletes all rows from the target table |
| before writing to it.</li> |
| <li><strong>table_schema</strong> – <p>When the create_disposition parameter is set to |
| CREATE_IF_NEEDED, the table_schema parameter enables specifying the |
| schema for the created target table. A table schema is as JSON with the |
| following structure:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>{"schema":[ |
| { |
| "dataType":{"type":"<COLUMN DATA TYPE>"}, |
| "name":"<COLUMN NAME>", |
| "nullable": <NULLABLE> |
| }, |
| ]} |
| </pre></div> |
| </div> |
| <p>All supported data types:</p> |
| <div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="nt">"schema"</span><span class="p">:[</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"date"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"datetime"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"time"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"timestamp"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"timestamp_ltz"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"timestamp_ntz"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"timestamp_tz"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"boolean"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"decimal"</span><span class="p">,</span><span class="nt">"precision"</span><span class="p">:</span><span class="mi">38</span><span class="p">,</span><span class="nt">"scale"</span><span class="p">:</span><span class="mi">1</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">true</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"double"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"float"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"integer"</span><span class="p">,</span><span class="nt">"precision"</span><span class="p">:</span><span class="mi">38</span><span class="p">,</span><span class="nt">"scale"</span><span class="p">:</span><span class="mi">0</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"number"</span><span class="p">,</span><span class="nt">"precision"</span><span class="p">:</span><span class="mi">38</span><span class="p">,</span><span class="nt">"scale"</span><span class="p">:</span><span class="mi">1</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"numeric"</span><span class="p">,</span><span class="nt">"precision"</span><span class="p">:</span><span class="mi">38</span><span class="p">,</span><span class="nt">"scale"</span><span class="p">:</span><span class="mi">2</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"real"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"array"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"object"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"variant"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">true</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"binary"</span><span class="p">,</span><span class="nt">"size"</span><span class="p">:</span><span class="kc">null</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"char"</span><span class="p">,</span><span class="nt">"length"</span><span class="p">:</span><span class="mi">1</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"string"</span><span class="p">,</span><span class="nt">"length"</span><span class="p">:</span><span class="kc">null</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"text"</span><span class="p">,</span><span class="nt">"length"</span><span class="p">:</span><span class="kc">null</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"varbinary"</span><span class="p">,</span><span class="nt">"size"</span><span class="p">:</span><span class="kc">null</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"varchar"</span><span class="p">,</span><span class="nt">"length"</span><span class="p">:</span><span class="mi">100</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">false</span><span class="p">},</span><span class="w"></span> |
| <span class="p">{</span><span class="nt">"dataType"</span><span class="p">:{</span><span class="nt">"type"</span><span class="p">:</span><span class="s2">"geography"</span><span class="p">},</span><span class="nt">"name"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="nt">"nullable"</span><span class="p">:</span><span class="kc">true</span><span class="p">}]</span><span class="w"></span> |
| <span class="p">}</span><span class="w"></span> |
| </pre></div> |
| </div> |
| </li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.WriteToSnowflake.URN"> |
| <code class="descname">URN</code><em class="property"> = 'beam:transform:org.apache.beam:snowflake_write:v1'</em><a class="headerlink" href="#apache_beam.io.snowflake.WriteToSnowflake.URN" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.io.snowflake.WriteToSnowflake.expand"> |
| <code class="descname">expand</code><span class="sig-paren">(</span><em>pbegin</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#WriteToSnowflake.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.WriteToSnowflake.expand" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.snowflake.CreateDisposition"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.snowflake.</code><code class="descname">CreateDisposition</code><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#CreateDisposition"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.CreateDisposition" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> |
| <p>Enum class for possible values of create dispositions: |
| CREATE_IF_NEEDED: default behaviour. The write operation checks whether |
| the specified target table exists; if it does not, the write operation |
| attempts to create the table Specify the schema for the target table |
| using the table_schema parameter. |
| CREATE_NEVER: The write operation fails if the target table does not exist.</p> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.CreateDisposition.CREATE_IF_NEEDED"> |
| <code class="descname">CREATE_IF_NEEDED</code><em class="property"> = 'CREATE_IF_NEEDED'</em><a class="headerlink" href="#apache_beam.io.snowflake.CreateDisposition.CREATE_IF_NEEDED" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.CreateDisposition.CREATE_NEVER"> |
| <code class="descname">CREATE_NEVER</code><em class="property"> = 'CREATE_NEVER'</em><a class="headerlink" href="#apache_beam.io.snowflake.CreateDisposition.CREATE_NEVER" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="staticmethod"> |
| <dt id="apache_beam.io.snowflake.CreateDisposition.VerifyParam"> |
| <em class="property">static </em><code class="descname">VerifyParam</code><span class="sig-paren">(</span><em>field</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#CreateDisposition.VerifyParam"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.CreateDisposition.VerifyParam" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.snowflake.WriteDisposition"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.snowflake.</code><code class="descname">WriteDisposition</code><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#WriteDisposition"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.WriteDisposition" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> |
| <p>Enum class for possible values of write dispositions: |
| APPEND: Default behaviour. Written data is added to the existing rows |
| in the table, |
| EMPTY: The target table must be empty; otherwise, the write operation fails, |
| TRUNCATE: The write operation deletes all rows from the target table |
| before writing to it.</p> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.WriteDisposition.APPEND"> |
| <code class="descname">APPEND</code><em class="property"> = 'APPEND'</em><a class="headerlink" href="#apache_beam.io.snowflake.WriteDisposition.APPEND" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.WriteDisposition.EMPTY"> |
| <code class="descname">EMPTY</code><em class="property"> = 'EMPTY'</em><a class="headerlink" href="#apache_beam.io.snowflake.WriteDisposition.EMPTY" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.snowflake.WriteDisposition.TRUNCATE"> |
| <code class="descname">TRUNCATE</code><em class="property"> = 'TRUNCATE'</em><a class="headerlink" href="#apache_beam.io.snowflake.WriteDisposition.TRUNCATE" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="staticmethod"> |
| <dt id="apache_beam.io.snowflake.WriteDisposition.VerifyParam"> |
| <em class="property">static </em><code class="descname">VerifyParam</code><span class="sig-paren">(</span><em>field</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/snowflake.html#WriteDisposition.VerifyParam"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.snowflake.WriteDisposition.VerifyParam" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
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