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class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Getting started<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/design/index.html">Introduction to Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/index.html">Quickstart (local)</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/single-server.html">Single server deployment</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/cluster.html">Clustered deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Tutorials<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-batch.html">Load files natively</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-msq-extern.html">Load files using SQL ๐</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-kafka.html">Load from Apache Kafka</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-batch-hadoop.html">Load from Apache Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-query.html">Querying data</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-rollup.html">Roll-up</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-sketches-theta.html">Theta sketches</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-retention.html">Configuring data retention</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/docker.html">Tutorial: Run with Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-kerberos-hadoop.html">Kerberized HDFS deep storage</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/tutorials/tutorial-msq-convert-spec.html">Convert ingestion spec to SQL</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Design<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/design/architecture.html">Design</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/design/segments.html">Segments</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/design/processes.html">Processes and servers</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/dependencies/deep-storage.html">Deep storage</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/dependencies/metadata-storage.html">Metadata storage</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/dependencies/zookeeper.html">ZooKeeper</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Ingestion<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/index.html">Ingestion</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/data-formats.html">Data formats</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/data-model.html">Data model</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/rollup.html">Data rollup</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/partitioning.html">Partitioning</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/ingestion-spec.html">Ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/schema-design.html">Schema design tips</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Stream ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/extensions-core/kafka-ingestion.html">Apache Kafka ingestion</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/extensions-core/kafka-supervisor-reference.html">Apache Kafka supervisor</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/extensions-core/kafka-supervisor-operations.html">Apache Kafka operations</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/extensions-core/kinesis-ingestion.html">Amazon Kinesis</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Batch ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/native-batch.html">Native batch</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/native-batch-input-sources.html">Native batch: input sources</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/hadoop.html">Hadoop-based</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">SQL-based ingestion ๐</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/index.html">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/concepts.html">Key concepts</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/api.html">API</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/security.html">Security</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/examples.html">Examples</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/reference.html">Reference</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/multi-stage-query/known-issues.html">Known issues</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/tasks.html">Task reference</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/ingestion/faq.html">Troubleshooting FAQ</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Data management<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/index.html">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/update.html">Data updates</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/delete.html">Data deletion</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/schema-changes.html">Schema changes</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/compaction.html">Compaction</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/data-management/automatic-compaction.html">Automatic compaction</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Querying<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Druid SQL</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql.html">Overview and syntax</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-data-types.html">SQL data types</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-operators.html">Operators</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-scalar.html">Scalar functions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-aggregations.html">Aggregation functions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-multivalue-string-functions.html">Multi-value string functions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-json-functions.html">JSON functions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-functions.html">All functions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-api.html">Druid SQL API</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-jdbc.html">JDBC driver API</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-query-context.html">SQL query context</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-metadata-tables.html">SQL metadata tables</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sql-translation.html">SQL query translation</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/querying.html">Native queries</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/query-execution.html">Query execution</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/troubleshooting.html">Troubleshooting</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Concepts</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/datasource.html">Datasources</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/joins.html">Joins</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/lookups.html">Lookups</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/multi-value-dimensions.html">Multi-value dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/nested-columns.html">Nested columns</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/multitenancy.html">Multitenancy</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/caching.html">Query caching</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/using-caching.html">Using query caching</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/query-context.html">Query context</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query types</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/timeseriesquery.html">Timeseries</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/topnquery.html">TopN</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/groupbyquery.html">GroupBy</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/scan-query.html">Scan</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/searchquery.html">Search</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/timeboundaryquery.html">TimeBoundary</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/segmentmetadataquery.html">SegmentMetadata</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/datasourcemetadataquery.html">DatasourceMetadata</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query components</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/filters.html">Filters</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/granularities.html">Granularities</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/dimensionspecs.html">Dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/aggregations.html">Aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/post-aggregations.html">Post-aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/misc/math-expr.html">Expressions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/having.html">Having filters (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/limitspec.html">Sorting and limiting (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/topnmetricspec.html">Sorting (topN)</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/sorting-orders.html">String comparators</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/querying/virtual-columns.html">Virtual columns</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/geo.html">Spatial filters</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Configuration<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/configuration/index.html">Configuration reference</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/development/extensions.html">Extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/configuration/logging.html">Logging</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Operations<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/web-console.html">Web console</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/java.html">Java runtime</a></li><div class="navGroup subNavGroup"><h4 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href="/docs/24.0.1/operations/basic-cluster-tuning.html">Basic cluster tuning</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/segment-optimization.html">Segment size optimization</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/mixed-workloads.html">Mixed workloads</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/http-compression.html">HTTP compression</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/clean-metadata-store.html">Automated metadata cleanup</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Monitoring</h4><ul><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/request-logging.html">Request logging</a></li><li class="navListItem"><a class="navItem" href="/docs/24.0.1/operations/metrics.html">Metrics</a></li><li class="navListItem"><a class="navItem" 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| <p>This tutorial demonstrates how to update existing data, showing both overwrites and appends.</p> |
| <p>For this tutorial, we'll assume you've already downloaded Apache Druid as described in |
| the <a href="/docs/24.0.1/tutorials/index.html">single-machine quickstart</a> and have it running on your local machine.</p> |
| <p>It will also be helpful to have finished <a href="/docs/24.0.1/tutorials/tutorial-batch.html">Tutorial: Loading a file</a>, <a href="/docs/24.0.1/tutorials/tutorial-query.html">Tutorial: Querying data</a>, and <a href="/docs/24.0.1/tutorials/tutorial-rollup.html">Tutorial: Rollup</a>.</p> |
| <h2><a class="anchor" aria-hidden="true" id="overwrite"></a><a href="#overwrite" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Overwrite</h2> |
| <p>This section of the tutorial will cover how to overwrite an existing interval of data.</p> |
| <h3><a class="anchor" aria-hidden="true" id="load-initial-data"></a><a href="#load-initial-data" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Load initial data</h3> |
| <p>Let's load an initial data set which we will overwrite and append to.</p> |
| <p>The spec we'll use for this tutorial is located at <code>quickstart/tutorial/updates-init-index.json</code>. This spec creates a datasource called <code>updates-tutorial</code> from the <code>quickstart/tutorial/updates-data.json</code> input file.</p> |
| <p>Let's submit that task:</p> |
| <pre><code class="hljs css language-bash">bin/post-index-task --file quickstart/tutorial/updates-init-index.json --url http://localhost:8081 |
| </code></pre> |
| <p>We have three initial rows containing an "animal" dimension and "number" metric:</p> |
| <pre><code class="hljs css language-bash">dsql> select * from <span class="hljs-string">"updates-tutorial"</span>; |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโฌโโโโโโโโฌโโโโโโโโโ |
| โ __time โ animal โ count โ number โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโผโโโโโโโโโโโผโโโโโโโโผโโโโโโโโโค |
| โ 2018-01-01T01:01:00.000Z โ tiger โ 1 โ 100 โ |
| โ 2018-01-01T03:01:00.000Z โ aardvark โ 1 โ 42 โ |
| โ 2018-01-01T03:01:00.000Z โ giraffe โ 1 โ 14124 โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโดโโโโโโโโโโโดโโโโโโโโดโโโโโโโโโ |
| Retrieved 3 rows <span class="hljs-keyword">in</span> 1.42s. |
| </code></pre> |
| <h3><a class="anchor" aria-hidden="true" id="overwrite-the-initial-data"></a><a href="#overwrite-the-initial-data" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Overwrite the initial data</h3> |
| <p>To overwrite this data, we can submit another task for the same interval, but with different input data.</p> |
| <p>The <code>quickstart/tutorial/updates-overwrite-index.json</code> spec will perform an overwrite on the <code>updates-tutorial</code> datasource.</p> |
| <p>Note that this task reads input from <code>quickstart/tutorial/updates-data2.json</code>, and <code>appendToExisting</code> is set to <code>false</code> (indicating this is an overwrite).</p> |
| <p>Let's submit that task:</p> |
| <pre><code class="hljs css language-bash">bin/post-index-task --file quickstart/tutorial/updates-overwrite-index.json --url http://localhost:8081 |
| </code></pre> |
| <p>When Druid finishes loading the new segment from this overwrite task, the "tiger" row now has the value "lion", the "aardvark" row has a different number, and the "giraffe" row has been replaced. It may take a couple of minutes for the changes to take effect:</p> |
| <pre><code class="hljs css language-bash">dsql> select * from <span class="hljs-string">"updates-tutorial"</span>; |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโฌโโโโโโโโฌโโโโโโโโโ |
| โ __time โ animal โ count โ number โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโผโโโโโโโโโโโผโโโโโโโโผโโโโโโโโโค |
| โ 2018-01-01T01:01:00.000Z โ lion โ 1 โ 100 โ |
| โ 2018-01-01T03:01:00.000Z โ aardvark โ 1 โ 9999 โ |
| โ 2018-01-01T04:01:00.000Z โ bear โ 1 โ 111 โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโดโโโโโโโโโโโดโโโโโโโโดโโโโโโโโโ |
| Retrieved 3 rows <span class="hljs-keyword">in</span> 0.02s. |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="combine-old-data-with-new-data-and-overwrite"></a><a href="#combine-old-data-with-new-data-and-overwrite" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Combine old data with new data and overwrite</h2> |
| <p>Let's try appending some new data to the <code>updates-tutorial</code> datasource now. We will add the data from <code>quickstart/tutorial/updates-data3.json</code>.</p> |
| <p>The <code>quickstart/tutorial/updates-append-index.json</code> task spec has been configured to read from the existing <code>updates-tutorial</code> datasource and the <code>quickstart/tutorial/updates-data3.json</code> file. The task will combine data from the two input sources, and then overwrite the original data with the new combined data.</p> |
| <p>Let's submit that task:</p> |
| <pre><code class="hljs css language-bash">bin/post-index-task --file quickstart/tutorial/updates-append-index.json --url http://localhost:8081 |
| </code></pre> |
| <p>When Druid finishes loading the new segment from this overwrite task, the new rows will have been added to the datasource. Note that roll-up occurred for the "lion" row:</p> |
| <pre><code class="hljs css language-bash">dsql> select * from <span class="hljs-string">"updates-tutorial"</span>; |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโฌโโโโโโโโฌโโโโโโโโโ |
| โ __time โ animal โ count โ number โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโผโโโโโโโโโโโผโโโโโโโโผโโโโโโโโโค |
| โ 2018-01-01T01:01:00.000Z โ lion โ 2 โ 400 โ |
| โ 2018-01-01T03:01:00.000Z โ aardvark โ 1 โ 9999 โ |
| โ 2018-01-01T04:01:00.000Z โ bear โ 1 โ 111 โ |
| โ 2018-01-01T05:01:00.000Z โ mongoose โ 1 โ 737 โ |
| โ 2018-01-01T06:01:00.000Z โ snake โ 1 โ 1234 โ |
| โ 2018-01-01T07:01:00.000Z โ octopus โ 1 โ 115 โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโดโโโโโโโโโโโดโโโโโโโโดโโโโโโโโโ |
| Retrieved 6 rows <span class="hljs-keyword">in</span> 0.02s. |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="append-to-the-data"></a><a href="#append-to-the-data" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Append to the data</h2> |
| <p>Let's try another way of appending data.</p> |
| <p>The <code>quickstart/tutorial/updates-append-index2.json</code> task spec reads input from <code>quickstart/tutorial/updates-data4.json</code> and will append its data to the <code>updates-tutorial</code> datasource. Note that <code>appendToExisting</code> is set to <code>true</code> in this spec.</p> |
| <p>Let's submit that task:</p> |
| <pre><code class="hljs css language-bash">bin/post-index-task --file quickstart/tutorial/updates-append-index2.json --url http://localhost:8081 |
| </code></pre> |
| <p>When the new data is loaded, we can see two additional rows after "octopus". Note that the new "bear" row with number 222 has not been rolled up with the existing bear-111 row, because the new data is held in a separate segment.</p> |
| <pre><code class="hljs css language-bash">dsql> select * from <span class="hljs-string">"updates-tutorial"</span>; |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโฌโโโโโโโโฌโโโโโโโโโ |
| โ __time โ animal โ count โ number โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโผโโโโโโโโโโโผโโโโโโโโผโโโโโโโโโค |
| โ 2018-01-01T01:01:00.000Z โ lion โ 2 โ 400 โ |
| โ 2018-01-01T03:01:00.000Z โ aardvark โ 1 โ 9999 โ |
| โ 2018-01-01T04:01:00.000Z โ bear โ 1 โ 111 โ |
| โ 2018-01-01T05:01:00.000Z โ mongoose โ 1 โ 737 โ |
| โ 2018-01-01T06:01:00.000Z โ snake โ 1 โ 1234 โ |
| โ 2018-01-01T07:01:00.000Z โ octopus โ 1 โ 115 โ |
| โ 2018-01-01T04:01:00.000Z โ bear โ 1 โ 222 โ |
| โ 2018-01-01T09:01:00.000Z โ falcon โ 1 โ 1241 โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโดโโโโโโโโโโโดโโโโโโโโดโโโโโโโโโ |
| Retrieved 8 rows <span class="hljs-keyword">in</span> 0.02s. |
| |
| </code></pre> |
| <p>If we run a GroupBy query instead of a <code>select *</code>, we can see that the "bear" rows will group together at query time:</p> |
| <pre><code class="hljs css language-bash">dsql> select __time, animal, SUM(<span class="hljs-string">"count"</span>), SUM(<span class="hljs-string">"number"</span>) from <span class="hljs-string">"updates-tutorial"</span> group by __time, animal; |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโฌโโโโโโโโโฌโโโโโโโโโ |
| โ __time โ animal โ EXPR<span class="hljs-variable">$2</span> โ EXPR<span class="hljs-variable">$3</span> โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโผโโโโโโโโโโโผโโโโโโโโโผโโโโโโโโโค |
| โ 2018-01-01T01:01:00.000Z โ lion โ 2 โ 400 โ |
| โ 2018-01-01T03:01:00.000Z โ aardvark โ 1 โ 9999 โ |
| โ 2018-01-01T04:01:00.000Z โ bear โ 2 โ 333 โ |
| โ 2018-01-01T05:01:00.000Z โ mongoose โ 1 โ 737 โ |
| โ 2018-01-01T06:01:00.000Z โ snake โ 1 โ 1234 โ |
| โ 2018-01-01T07:01:00.000Z โ octopus โ 1 โ 115 โ |
| โ 2018-01-01T09:01:00.000Z โ falcon โ 1 โ 1241 โ |
| โโโโโโโโโโโโโโโโโโโโโโโโโโโโดโโโโโโโโโโโดโโโโโโโโโดโโโโโโโโโ |
| Retrieved 7 rows <span class="hljs-keyword">in</span> 0.23s. |
| </code></pre> |
| </span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/24.0.1/tutorials/tutorial-retention.html"><span class="arrow-prev">โ </span><span>Configuring data retention</span></a><a class="docs-next button" href="/docs/24.0.1/tutorials/tutorial-compaction.html"><span>Compacting segments</span><span class="arrow-next"> โ</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#overwrite">Overwrite</a><ul class="toc-headings"><li><a href="#load-initial-data">Load initial data</a></li><li><a href="#overwrite-the-initial-data">Overwrite the initial data</a></li></ul></li><li><a href="#combine-old-data-with-new-data-and-overwrite">Combine old data with new data and overwrite</a></li><li><a href="#append-to-the-data">Append to the data</a></li></ul></nav></div><footer class="nav-footer druid-footer" id="footer"><div class="container"><div class="text-center"><p><a href="/technology">Technology</a>โยทโ<a href="/use-cases">Use Cases</a>โยทโ<a href="/druid-powered">Powered by Druid</a>โยทโ<a href="/docs/24.0.1/">Docs</a>โยทโ<a href="/community/">Community</a>โยทโ<a href="/downloads.html">Download</a>โยทโ<a href="/faq">FAQ</a></p></div><div class="text-center"><a title="Join the user group" href="https://groups.google.com/forum/#!forum/druid-user" target="_blank"><span class="fa fa-comments"></span></a>โยทโ<a title="Follow Druid" href="https://twitter.com/druidio" target="_blank"><span class="fab fa-twitter"></span></a>โยทโ<a title="Download via Apache" href="https://www.apache.org/dyn/closer.cgi?path=/incubator/druid/{{ site.druid_versions[0].versions[0].version }}/apache-druid-{{ site.druid_versions[0].versions[0].version }}-bin.tar.gz" target="_blank"><span class="fas fa-feather"></span></a>โยทโ<a title="GitHub" href="https://github.com/apache/druid" target="_blank"><span class="fab fa-github"></span></a></div><div class="text-center license">Copyright ยฉ 2022 <a href="https://www.apache.org/" target="_blank">Apache Software Foundation</a>.<br/>Except where otherwise noted, licensed under <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.<br/>Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script><script> |
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