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Complex Data</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/querying-complex-data-introduction/">Querying Complex Data
Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/selecting-flat-data/">Selecting Flat Data</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions,
Clauses, and Joins</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/selecting-nested-data-for-a-column/">Selecting Nested Data
for a Column</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/selecting-multiple-columns-within-nested-data/">Selecting
Multiple Columns Within Nested Data</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/querying-hive/">Querying Hive</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/querying-the-information-schema/">Querying the INFORMATION
SCHEMA</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/querying-system-tables/">Querying System Tables</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring
and Canceling Queries in the Drill Web Console</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Performance
Tuning</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/performance-tuning-introduction/">Performance Tuning
Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/partition-pruning/">Partition Pruning</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet
Metadata Reading</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Query
Plans and Tuning</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning
Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/guidelines-for-optimizing-aggregation/">Guidelines for
Optimizing Aggregation</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/modifying-query-planning-options/">Modifying Query Planning
Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based
and Hash-Based Memory-Constrained Operators</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling
Parallelization to Balance Performance with Multi-Tenancy</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript:
void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/query-plans/">Query Plans</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript:
void(0);">Performance Tuning Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/query-profile-column-descriptions/">Query Profile Column
Descriptions</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/physical-operators/">Physical Operators</a></li>
-
- </ul>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Log and
Debug</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/log-and-debug-introduction/">Log and Debug
Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/error-messages/">Error Messages</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/modify-logback-xml/">Modify logback.xml</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/review-the-java-stack-trace/">Review the Java Stack
Trace</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/query-audit-logging/">Query Audit Logging</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL
Reference</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/sql-reference-introduction/">SQL Reference
Introduction</a></li>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Data
Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/supported-data-types/">Supported Data Types</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/handling-different-data-types/">Handling Different Data
Types</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/lexical-structure/">Lexical Structure</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/operators/">Operators</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL
Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/about-sql-function-examples/">About SQL Function
Examples</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/math-and-trig/">Math and Trig</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/data-type-conversion/">Data Type Conversion</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/date-time-functions-and-arithmetic/">Date/Time Functions and
Arithmetic</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/string-manipulation/">String Manipulation</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate
Statistical</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/functions-for-handling-nulls/">Functions for Handling
Nulls</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window
Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/sql-window-functions-introduction/">SQL Window Functions
Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/aggregate-window-functions/">Aggregate Window
Functions</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/ranking-window-functions/">Ranking Window Functions</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/value-window-functions/">Value Window Functions</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/sql-window-functions-examples/">SQL Window Functions
Examples</a></li>
-
- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested
Data Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/nested-data-limitations/">Nested Data Limitations</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/flatten/">FLATTEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
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- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/query-directory-functions/">Query Directory Functions</a></li>
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Commands</a></li>
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href="/drill/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/alter-session/">ALTER SESSION</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/partition-by-clause/">PARTITION BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/create-view/">CREATE VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/drop-table/">DROP TABLE</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/explain/">EXPLAIN</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/select-list/">SELECT List</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/from-clause/">FROM Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/group-by-clause/">GROUP BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW
SCHEMAS</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/show-tables/">SHOW TABLES</a></li>
-
- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/use/">USE</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL
Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal"
href="/drill/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/reserved-keywords/">Reserved Keywords</a></li>
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href="/drill/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources
and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/data-sources-and-file-formats-introduction/">Data Sources and
File Formats Introduction</a></li>
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href="/drill/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type
Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal"
href="/drill/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive
UDF</a></li>
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href="/drill/docs/parquet-format/">Parquet Format</a></li>
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href="/drill/docs/json-data-model/">JSON Data Model</a></li>
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href="/drill/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
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href="/drill/docs/sequence-files/">Sequence Files</a></li>
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Functions</a></li>
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href="/drill/docs/develop-custom-functions-introduction/">Develop Custom
Functions Introduction</a></li>
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href="/drill/docs/developing-a-simple-function/">Developing a Simple
Function</a></li>
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href="/drill/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a
Simple Function</a></li>
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href="/drill/docs/developing-an-aggregate-function/">Developing an Aggregate
Function</a></li>
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href="/drill/docs/adding-custom-functions-to-drill/">Adding Custom Functions to
Drill</a></li>
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href="/drill/docs/using-custom-functions-in-queries/">Using Custom Functions in
Queries</a></li>
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href="/drill/docs/custom-function-interfaces/">Custom Function
Interfaces</a></li>
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href="/drill/docs/compiling-drill-from-source/">Compiling Drill from
Source</a></li>
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href="/drill/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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to Drill</a></li>
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href="/drill/docs/apache-drill-contribution-guidelines/">Apache Drill
Contribution Guidelines</a></li>
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href="/drill/docs/apache-drill-contribution-ideas/">Apache Drill Contribution
Ideas</a></li>
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href="/drill/docs/rpc-overview/">RPC Overview</a></li>
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href="/drill/docs/useful-research/">Useful Research</a></li>
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Notes</a></li>
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Notes</a></li>
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Notes</a></li>
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- <h1>Apache Drill 0.9.0 Release Notes</h1>
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- <p>It has been about a month since the release of Drill 0.8, which
included <a href="/drill/blog/drill-0.8-released/">more than 240
improvements</a>. Today we're happy to announce the availability of Drill
0.9, providing additional enhancements and bug fixes. In fact, this release
includes <a
href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12313820&version=12328813";>200
resolved JIRAs</a>. Some of the noteworthy features in Drill 0.9 are:</p>
-
-<ul>
-<li><strong>Authentication</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-2674";>DRILL-2674</a>). Drill
now supports username/password authentication through the Java and C++ clients,
as well as JDBC and ODBC. On the server-side, Drill leverages Linux PAM to
securely validate the credentials. Users can choose to use an external user
directory such as Active Directory or LDAP. To enable authentication, set the
<code>security.user.auth</code> option in <code>drill-override.conf</code>.</li>
-<li><strong>Impersonation</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-2363";>DRILL-2363</a>).
Queries now execute and access resources using the identity of the user who
submitted the query. Previously, all queries would run as the same user (eg,
<code>drill</code>). With the new impersonation capability, the query will fail
if the submitting user does not have permission to read the requested file(s)
in the distributed file system. To enable impersonation, set the
<code>drill.exec.impersonation</code> option in
<code>drill-override.conf</code>.</li>
-<li><strong>Ownership chaining</strong>. Drill now allows views with different
owners to be chained. This represents a very flexible access control solution.
For example, an administrator with access to raw, sensitive data could create a
view called <code>masked</code> which would expose only a subset of the data to
other users. The administrator would enable users to read the
<code>masked</code> view but not the raw data. Note that Drill provides an
option <code>max_chained_user_hops</code> that specifies how many ownership
changed are allowed in a chain, thereby providing administrators (or data
stewards) more control over sharing of data.</li>
-<li><strong>MongoDB authentication</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-1502";>DRILL-1502</a>). Drill
can now connect to a MongoDB cluster that requires authentication.</li>
-<li><strong>Extended JSON datatypes</strong>. Our friends at MongoDB invented
<a
href="http://docs.mongodb.org/manual/reference/mongodb-extended-json/";>extended
JSON</a> - a set of extensions to the JSON format for supporting additional
data types. We decided to embrace extended JSON in Drill. For example, standard
JSON doesn't have a time type, so a time could be represented as either a
string or a number: <code>{"foo": "19:20:30.450Z"}</code>
is just a string. With extended JSON, the <code>$time</code> qualifier can be
used to specify that <code>foo</code> is a time <code>{"foo":
{"$time": "19:20:30.450Z"}}</code>.
-We now support a number of qualifiers including <code>$bin</code>,
<code>$date</code>, <code>$time</code>, <code>$interval</code>,
<code>$numberLong</code> and <code>$dateDay</code> (see <a
href="https://github.com/apache/drill/blob/master/exec/java-exec/src/test/resources/vector/complex/extended.json";>the
example</a>). We're in the process of adding some additional qualifiers to
make sure that all of MongoDB's extended types are supported (this is
particularly important when querying data in MongoDB).</li>
-<li><strong>Avro support</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-1512";>DRILL-1512</a>). Drill
can now read Avro files. This patch was contributed by Andrew Selden at
Elastic.co (formerly known as Elasticsearch).</li>
-<li><strong>Improved error messages</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-2675";>DRILL-2675</a> and
more). It can be challenging for a complex distributed system like Drill to
translate low-level internal conditions into actionable messages to the user.
This release includes several enhancements that enable Drill to accomplish just
that in a variety of cases.</li>
-<li><strong>Parquet and Calcite enhancements</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-1410";>DRILL-1410</a> and <a
href="https://issues.apache.org/jira/browse/DRILL-1384";>DRILL-1384</a>). Drill
isn't a traditional query engine - it's the first analytical query
engine with a JSON data model. This has required us to enhance Parquet (our
columnar format) and Calcite (our SQL parser). These enhancements have now been
contributed back to those projects, and Drill is using the latest versions
which include these enhancements.</li>
-<li><p><strong>New sys tables for memory and thread information</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-2275";>DRILL-2275</a>). Drill
includes two new <code>sys</code> tables that provide real-time metrics about
memory utilization and threads on each of the nodes in the cluster. You can run
a simple <code>SELECT *</code> to see what information is available:</p>
-<div class="highlight"><pre><code class="language-sql" data-lang="sql"><span
class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span>
<span class="n">sys</span><span class="p">.</span><span
class="n">drillmemory</span><span class="p">;</span>
-<span class="k">SELECT</span> <span class="o">*</span> <span
class="k">FROM</span> <span class="n">sys</span><span class="p">.</span><span
class="n">drillbitthreads</span><span class="p">;</span>
-</code></pre></div></li>
-<li><p><strong>Support for very wide tables</strong> (<a
href="https://issues.apache.org/jira/browse/DRILL-2739";>DRILL-2739</a>). Drill
previously had some issues with tables that had more than 4095 colums. This
limitation has been addressed.</p></li>
-</ul>
-
-<p>You can now <a href="/drill/download/">download Drill 0.9</a>. As always,
you can check out the official <a href="/drill/docs/release-notes/">release
notes</a> for more details.</p>
-
-<p>We're gearing up for Drill's 1.0 release later this month. Stay
tuned!</p>
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