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internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li> + + </ul> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/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="/docs/querying-hive/">Querying Hive</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li> + + + </ul> + + + + <li class="toctree-l1 current_section "><a href="javascript: void(0);">Performance Tuning</a></li> + <ul class="current_section"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li> + + + + <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="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/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="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/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="/docs/query-plans/">Query Plans</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style=""> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3 current"><a class="reference internal" href="/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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li> + + + </ul> + + + + <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="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/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="/docs/about-sql-function-examples/">About SQL Function Examples</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li> + + </ul> + + + + <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="/docs/nested-data-limitations/">Nested Data Limitations</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li> + + + + <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-from/">SELECT FROM</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-group-by/">SELECT GROUP BY</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-having/">SELECT HAVING</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-limit/">SELECT LIMIT</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-offset/">SELECT OFFSET</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-order-by/">SELECT ORDER BY</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-union/">SELECT UNION</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-where/">SELECT WHERE</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/select-with/">SELECT WITH</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li> + + </ul> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li> + + + </ul> + + + + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li> + + </ul> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Archived Pages</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Progress Reports</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/2014-q1-drill-report/">2014 Q1 Drill Report</a></li> + + + </ul> + + + + <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> + + + </ul> + + </div> + </div> +</aside> + + +<nav class="breadcrumbs"> + <li><a href="/docs/">Docs</a></li> + + + <li><a href="/docs/performance-tuning/">Performance Tuning</a></li> + + <li><a href="/docs/performance-tuning-reference/">Performance Tuning Reference</a></li> + + <li>Physical Operators</li> +</nav> + +<div class="main-content-wrapper"> + <div class="main-content"> + + + <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/performance-tuning/performance-tuning-reference/020-physical-operators.md"; target="_blank"><i class="fa fa-pencil-square-o"></i></a> + + + <div class="int_title left"> + <h1>Physical Operators</h1> + + </div> + + <link href="/css/docpage.css" rel="stylesheet" type="text/css"> + + <div class="int_text" align="left"> + + <p>This document describes the physical operators that Drill uses in query plans.</p> + +<h2 id="distribution-operators">Distribution Operators</h2> + +<p>Drill uses the following operators to perform data distribution over the network: </p> + +<ul> +<li>HashToRandomExchange</li> +<li>HashToMergeExchange</li> +<li>UnionExchange</li> +<li>SingleMergeExchange</li> +<li>BroadcastExchange</li> +<li>UnorderedMuxExchange</li> +</ul> + +<h2 id="join-operators">Join Operators</h2> + +<p>Drill uses the following operators:</p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Hash Join</td> +<td>A Hash Join is used for inner joins, left, right and full outer joins. A hash table is built on the rows produced by the inner child of the Hash Join. The outer child rows are used to probe the hash table and find matches. This operator Holds the entire dataset for the right hand side of the join in memory which could be up to 2 billion records per minor fragment.</td> +</tr> +<tr> +<td>Merge Join</td> +<td>A Merge Join is used for inner join, left and right outer joins. Inputs to the Merge Join must be sorted. It reads the sorted input streams from both sides and finds matching rows. This operator holds the amount of memory of one incoming record batch from each side of the join. In addition, if there are repeating values in the right hand side of the join, the Merge Join will hold record batches for as long as a repeated value extends.</td> +</tr> +<tr> +<td>Nested Loop Join</td> +<td>A Nested Loop Join is used for certain types of cartesian joins and inequality joins.</td> +</tr> +</tbody></table> + +<h2 id="aggregate-operators">Aggregate Operators</h2> + +<p>Drill uses the following aggregate operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Hash Aggregate</td> +<td>A Hash Aggregate performs grouped aggregation on the input data by building a hash table on the GROUP-BY keys and computing the aggregate values within each group. This operator holds memory for each aggregation grouping and each aggregate value, up to 2 billion values per minor fragment.</td> +</tr> +<tr> +<td>Streaming Aggregate</td> +<td>A Streaming Aggregate performs grouped aggregation and non-grouped aggregation. For grouped aggregation, the data must be sorted on the GROUP-BY keys. Aggregate values are computed within each group. For non-grouped aggregation, data does not have to be sorted. This operator maintains a single aggregate grouping (keys and aggregate intermediate values) at a time in addition to the size of one incoming record batch.</td> +</tr> +</tbody></table> + +<h2 id="sort-and-limit-operators">Sort and Limit Operators</h2> + +<p>Drill uses the following sort and limiter operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Sort</td> +<td>A Sort operator is used to perform an ORDER BY and as an upstream operator for other operations that require sorted data such as Merge Join, Streaming Aggregate.</td> +</tr> +<tr> +<td>ExternalSort</td> +<td>The ExternalSort operator can potentially hold the entire dataset in memory. This operator will also start spooling to the disk in the case that there is memory pressure. In this case, the external sort will continue to try to use as much memory as available. In all cases, external sort will hold at least one record batch in memory for each record spill. Spills are currently sized based on the amount of memory available to the external sort operator.</td> +</tr> +<tr> +<td>TopN</td> +<td>A TopN operator is used to perform an ORDER BY with LIMIT.</td> +</tr> +<tr> +<td>Limit</td> +<td>A Limit operator is used to restrict the number of rows to a value specified by the LIMIT clause.</td> +</tr> +</tbody></table> + +<h2 id="projection-operators">Projection Operators</h2> + +<p>Drill uses the following projection operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Project</td> +<td>A Project operator projects columns and/or expressions involving columns and constants. This operator holds one incoming record batch plus any additional materialized projects for the same number of rows as the incoming record batch.</td> +</tr> +<tr> +<td>ExternalSort</td> +<td>The ExternalSort operator can potentially hold the entire dataset in memory. This operator will also start spooling to the disk in the case that there is memory pressure. In this case, the external sort will continue to try to use as much memory as available. In all cases, external sort will hold at least one record batch in memory for each record spill. Spills are currently sized based on the amount of memory available to the external sort operator.</td> +</tr> +<tr> +<td>TopN</td> +<td>A TopN operator is used to perform an ORDER BY with LIMIT.</td> +</tr> +<tr> +<td>Limit</td> +<td>A Limit operator is used to restrict the number of rows to a value specified by the LIMIT clause.</td> +</tr> +</tbody></table> + +<h2 id="filter-and-related-operators">Filter and Related Operators</h2> + +<p>Drill uses the following filter and related operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Filter</td> +<td>A Filter operator is used to evaluate the WHERE clause and HAVING clause predicates. These predicates may consist of join predicates as well as single table predicates. The join predicates are evaluated by a join operator and the remaining predicates are evaluated by the Filter operator. The amount of memory it consumes is slightly more than the size of one incoming record batch.</td> +</tr> +<tr> +<td>SelectionVectorRemover</td> +<td>A SelectionVectorRemover is used in conjunction with either a Sort or Filter operator. This operator maintains roughly twice the amount of memory as required by a single incoming record batch.</td> +</tr> +</tbody></table> + +<h2 id="set-operators">Set Operators</h2> + +<p>Drill uses the following set operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Union-All</td> +<td>A Union-All operator accepts rows from 2 input streams and produces a single output stream where the left input rows are emitted first followed by the right input rows. The column names of the output stream are inherited from the left input. The column types of the two child inputs must be compatible.</td> +</tr> +</tbody></table> + +<h2 id="scan-operators">Scan Operators</h2> + +<p>Drill uses the following scan operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>Scan</td> +<td>Performs a scan of the underlying table. The table may be in one of several formats, such as Parquet, Text, JSON, and so on. The Scan operator encapsulates the formats into one operator.</td> +</tr> +</tbody></table> + +<h2 id="receiver-operators">Receiver Operators</h2> + +<p>Drill uses the following receiver operators: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>UnorderedReceiver</td> +<td>The unordered receiver operator can hold up to 5 incoming record batches.</td> +</tr> +<tr> +<td>MergingReceiver</td> +<td>This operator holds up to 5 record batches for each incoming stream (generally either number of nodes or number of sending fragments, depending on use of muxxing).</td> +</tr> +</tbody></table> + +<h2 id="sender-operators">Sender Operators</h2> + +<p>Drill uses the following sender operators: </p> + +<table><thead> +<tr> +<th>PartitionSender</th> +<th></th> +</tr> +</thead><tbody> +<tr> +<td>The PartitionSender operator maintains a queue for each outbound destination. May be either the number of outbound minor fragments or the number of the nodes</td> +<td>depending on the use of muxxing operations. Each queue may store up to 3 record batches for each destination.</td> +</tr> +</tbody></table> + +<h2 id="file-writers">File Writers</h2> + +<p>Drill uses the following file writers: </p> + +<table><thead> +<tr> +<th>Operator</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>ParquetFileWriter</td> +<td>The ParquetFileWriter buffers approximately twice the default Parquet row group size in memory per minor fragment (default in Drill is 512mb).</td> +</tr> +</tbody></table> + + + + <div class="doc-nav"> + + <span class="previous-toc"><a href="/docs/query-profile-column-descriptions/">â Query Profile Column Descriptions</a></span><span class="next-toc"><a href="/docs/log-and-debug/">Log and Debug â</a></span> +</div> + + + </div> + </div> +</div> + + </div> + <p class="push"></p> +<div id="footer" class="mw"> +<div class="wrapper"> +Copyright © 2012-2014 The Apache Software Foundation, licensed under the Apache License, Version 2.0.<br> +Apache and the Apache feather logo are trademarks of The Apache Software Foundation. Other names appearing on the site may be trademarks of their respective owners.<br/><br/> +</div> +</div> + + <script> +(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ +(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), +m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) +})(window,document,'script','//www.google-analytics.com/analytics.js','ga'); + +ga('create', 'UA-53379651-1', 'auto'); +ga('send', 'pageview'); +</script> + +</body> +</html>
http://git-wip-us.apache.org/repos/asf/drill-site/blob/9833d32c/docs/planning-and-execution-options/index.html ---------------------------------------------------------------------- diff --git a/docs/planning-and-execution-options/index.html b/docs/planning-and-execution-options/index.html index 4738635..2fa53b7 100644 --- a/docs/planning-and-execution-options/index.html +++ b/docs/planning-and-execution-options/index.html @@ -70,6 +70,8 @@ <li><a href="/docs/develop-custom-functions/">Develop Custom Functions</a></li> + <li><a href="/docs/troubleshooting/">Troubleshooting</a></li> + <li><a href="/docs/developer-information/">Developer Information</a></li> <li><a href="/docs/release-notes/">Release Notes</a></li> @@ -82,8 +84,6 @@ <li><a href="/docs/project-bylaws/">Project Bylaws</a></li> - <li><a href="/docs/log-and-debug/">Log and Debug</a></li> - </ul> </li> <li class='nav'> @@ -150,6 +150,10 @@ + <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li> @@ -540,11 +544,41 @@ </ul> + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> + + </ul> + + </ul> - <li class="toctree-l1"><a class="reference internal" href="/docs/log-and-debug/">Log and Debug</a></li> + <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> @@ -759,6 +793,10 @@ + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> @@ -840,6 +878,10 @@ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + </ul> @@ -896,29 +938,6 @@ <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> - - <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> - - - </ul> - - </ul> </div> http://git-wip-us.apache.org/repos/asf/drill-site/blob/9833d32c/docs/plugin-configuration-introduction/index.html ---------------------------------------------------------------------- diff --git a/docs/plugin-configuration-introduction/index.html b/docs/plugin-configuration-introduction/index.html index 8c1e9fd..a428eef 100644 --- a/docs/plugin-configuration-introduction/index.html +++ b/docs/plugin-configuration-introduction/index.html @@ -70,6 +70,8 @@ <li><a href="/docs/develop-custom-functions/">Develop Custom Functions</a></li> + <li><a href="/docs/troubleshooting/">Troubleshooting</a></li> + <li><a href="/docs/developer-information/">Developer Information</a></li> <li><a href="/docs/release-notes/">Release Notes</a></li> @@ -82,8 +84,6 @@ <li><a href="/docs/project-bylaws/">Project Bylaws</a></li> - <li><a href="/docs/log-and-debug/">Log and Debug</a></li> - </ul> </li> <li class='nav'> @@ -150,6 +150,10 @@ + <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li> @@ -540,11 +544,41 @@ </ul> + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> + + </ul> + + </ul> - <li class="toctree-l1"><a class="reference internal" href="/docs/log-and-debug/">Log and Debug</a></li> + <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> @@ -759,6 +793,10 @@ + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> @@ -840,6 +878,10 @@ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + </ul> @@ -896,29 +938,6 @@ <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> - - <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> - - - </ul> - - </ul> </div> @@ -975,12 +994,12 @@ name. Names are case-sensitive.</li> <h2 id="storage-plugin-attributes">Storage Plugin Attributes</h2> -<p>The following diagram of the dfs storage plugin briefly describes options you configure in a typical storage plugin configuration:</p> - -<p><img src="/docs/img/connect-plugin.png" alt="dfs plugin"></p> +<p>The following graphic shows key attributes of a typical dfs storage plugin:<br> +<img src="/docs/img/connect-plugin.png" alt="dfs plugin"></p> -<p>The following table describes the attributes you configure for storage plugins in more detail than the diagram. </p> +<h2 id="list-of-attributes-and-definitions">List of Attributes and Definitions</h2> +<p>The following table describes the attributes you configure for storage plugins. <table> <tr> <th>Attribute</th> @@ -989,74 +1008,139 @@ name. Names are case-sensitive.</li> <th>Description</th> </tr> <tr> - <td>"type"</td> - <td>"file"<br>"hbase"<br>"hive"<br>"mongo"</td> + <td>"type"</td> + <td>"file"<br>"hbase"<br>"hive"<br>"mongo"</td> <td>yes</td> - <td>The storage plugin type name supported by Drill.</td> + <td>A valid storage plugin type name.</td> </tr> <tr> - <td>"enabled"</td> + <td>"enabled"</td> <td>true<br>false</td> <td>yes</td> - <td>The state of the storage plugin.</td> + <td>State of the storage plugin.</td> </tr> <tr> - <td>"connection"</td> - <td>"classpath:///"<br>"file:///"<br>"mongodb://localhost:27017/"<br>"maprfs:///"</td> + <td>"connection"</td> + <td>"classpath:///"<br>"file:///"<br>"mongodb://localhost:27017/"<br>"maprfs:///"</td> <td>implementation-dependent</td> - <td>The type of distributed file system. Drill can work with any distributed system, such as HDFS and S3, or files in your file system.</td> + <td>Type of distributed file system, such as HDFS, Amazon S3, or files in your file system.</td> </tr> <tr> - <td>"workspaces"</td> - <td>null<br>"logs"</td> + <td>"workspaces"</td> + <td>null<br>"logs"</td> <td>no</td> - <td>One or more unique workspace names, enclosed in double quotation marks. If a workspace is defined more than once, the latest one overrides the previous ones. Used with local or distributed file systems.</td> + <td>One or more unique workspace names. If a workspace name is used more than once, only the last definition is effective. </td> </tr> <tr> - <td>"workspaces". . . "location"</td> - <td>"location": "/"<br>"location": "/tmp"</td> + <td>"workspaces". . . "location"</td> + <td>"location": "/"<br>"location": "/tmp"</td> <td>no</td> - <td>The path to a directory on the file system.</td> + <td>Path to a directory on the file system.</td> </tr> <tr> - <td>"workspaces". . . "writable"</td> + <td>"workspaces". . . "writable"</td> <td>true<br>false</td> <td>no</td> - <td>One or more unique workspace names, enclosed in double quotation marks. If a workspace is defined more than once, the latest one overrides the previous ones. Not used with local or distributed file systems.</td> + <td>One or more unique workspace names. If defined more than once, the last workspace name overrides the others.</td> </tr> <tr> - <td>"workspaces". . . "defaultInputFormat"</td> - <td>null<br>"parquet"<br>"csv"<br>"json"</td> + <td>"workspaces". . . "defaultInputFormat"</td> + <td>null<br>"parquet"<br>"csv"<br>"json"</td> <td>no</td> - <td>The format of data Drill reads by default, regardless of extension. Parquet is the default.</td> + <td>Format for reading data, regardless of extension. Default = Parquet.</td> </tr> <tr> - <td>"formats"</td> - <td>"psv"<br>"csv"<br>"tsv"<br>"parquet"<br>"json"<br>"avro"<br>"maprdb" *</td> + <td>"formats"</td> + <td>"psv"<br>"csv"<br>"tsv"<br>"parquet"<br>"json"<br>"avro"<br>"maprdb" *</td> <td>yes</td> - <td>One or more file formats of data Drill can read. Drill can implicitly detect some file formats based on the file extension or the first few bits of data within the file, but you need to configure an option for others.</td> + <td>One or more valid file formats for reading. Drill implicitly detects formats of some files based on extension or bits of data in the file, others require configuration.</td> </tr> <tr> - <td>"formats" . . . "type"</td> - <td>"text"<br>"parquet"<br>"json"<br>"maprdb" *</td> + <td>"formats" . . . "type"</td> + <td>"text"<br>"parquet"<br>"json"<br>"maprdb" *</td> <td>yes</td> - <td>The type of the format specified. For example, you can define two formats, csv and psv, as type "Text", but having different delimiters. </td> + <td>Format type. You can define two formats, csv and psv, as type "Text", but having different delimiters. </td> </tr> <tr> - <td>formats . . . "extensions"</td> - <td>["csv"]</td> + <td>formats . . . "extensions"</td> + <td>["csv"]</td> <td>format-dependent</td> - <td>The extensions of the files that Drill can read.</td> + <td>Extensions of the files that Drill can read.</td> </tr> <tr> - <td>"formats" . . . "delimiter"</td> - <td>"\t"<br>","</td> + <td>"formats" . . . "delimiter"</td> + <td>"\t"<br>","</td> <td>format-dependent</td> - <td>The delimiter used to separate columns in text files such as CSV. Specify a non-printable delimiter in the storage plugin config by using the form \uXXXX, where XXXX is the four numeral hex ascii code for the character.</td> + <td>One or more characters that separate records in a delimited text file, such as CSV. Use a 4-digit hex ascii code syntax \uXXXX for a non-printable delimiter. </td> </tr> -</table> + <tr> + <td>"formats" . . . "fieldDelimiter"</td> + <td>","</td> + <td>no</td> + <td>A single character that separates each value in a column of a delimited text file.</td> + </tr> + <tr> + <td>"formats" . . . "quote"</td> + <td>"""</td> + <td>no</td> + <td>A single character that starts/ends a value in a delimited text file.</td> + </tr> + <tr> + <td>"formats" . . . "escape"</td> + <td>"`"</td> + <td>no</td> + <td>A single character that escapes the quote character.</td> + </tr> + <tr> + <td>"formats" . . . "comment"</td> + <td>"#"</td> + <td>no</td> + <td>The line decoration that starts a comment line in the delimited text file.</td> + </tr> + <tr> + <td>"formats" . . . "skipFirstLine"</td> + <td>true</td> + <td>no</td> + <td>To include or omits the header when reading a delimited text file. + </td> + </tr> +</table></p> + +<p>* Pertains only to distributed drill installations using the mapr-drill package. </p> + +<h2 id="using-the-formats">Using the Formats</h2> + +<p>You can use the following attributes when the <code>sys.options</code> property setting <code>exec.storage.enable_new_text_reader</code> is true (the default):</p> -<p>* Pertains only to distributed drill installations using the mapr-drill package.</p> +<ul> +<li>comment<br></li> +<li>escape<br></li> +<li>fieldDeliimiter<br></li> +<li>quote<br></li> +<li>skipFirstLine</li> +</ul> + +<p>The "formats" apply to all workspaces defined in a storage plugin. A typical use case defines separate storage plugins for different root directories to query the files stored below the directory. An alternative use case defines multiple formats within the same storage plugin and names target files using different extensions to match the formats.</p> + +<p>The following example of a storage plugin for reading CSV files with the new text reader includes two formats for reading files having either a <code>csv</code> or <code>csv2</code> extension. The text reader does include the first line of column names in the queries of <code>.csv</code> files but does not include it in queries of <code>.csv2</code> files. </p> +<div class="highlight"><pre><code class="language-text" data-lang="text">"csv": { + "type": "text", + "extensions": [ + "csv" + ], + "delimiter": "," +}, +"csv_with_header": { + "type": "text", + "extensions": [ + "csv2" + ], + "comment": "&", + "skipFirstLine": true, + "delimiter": "," +}, +</code></pre></div> +<h2 id="using-other-attributes">Using Other Attributes</h2> <p>The configuration of other attributes, such as <code>size.calculator.enabled</code> in the hbase plugin and <code>configProps</code> in the hive plugin, are implementation-dependent and beyond the scope of this document.</p> @@ -1067,7 +1151,7 @@ name. Names are case-sensitive.</li> </code></pre></div> <p>For example, using uppercase letters in the query after defining the storage plugin and workspace names using lowercase letters does not work. </p> -<h2 id="rest-api">REST API</h2> +<h2 id="storage-plugin-rest-api">Storage Plugin REST API</h2> <p>Drill provides a REST API that you can use to create a storage plugin. Use an HTTP POST and pass two properties:</p> http://git-wip-us.apache.org/repos/asf/drill-site/blob/9833d32c/docs/ports-used-by-drill/index.html ---------------------------------------------------------------------- diff --git a/docs/ports-used-by-drill/index.html b/docs/ports-used-by-drill/index.html index c1c6bc4..4ebdf30 100644 --- a/docs/ports-used-by-drill/index.html +++ b/docs/ports-used-by-drill/index.html @@ -70,6 +70,8 @@ <li><a href="/docs/develop-custom-functions/">Develop Custom Functions</a></li> + <li><a href="/docs/troubleshooting/">Troubleshooting</a></li> + <li><a href="/docs/developer-information/">Developer Information</a></li> <li><a href="/docs/release-notes/">Release Notes</a></li> @@ -82,8 +84,6 @@ <li><a href="/docs/project-bylaws/">Project Bylaws</a></li> - <li><a href="/docs/log-and-debug/">Log and Debug</a></li> - </ul> </li> <li class='nav'> @@ -150,6 +150,10 @@ + <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li> @@ -540,11 +544,41 @@ </ul> + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> + + </ul> + + </ul> - <li class="toctree-l1"><a class="reference internal" href="/docs/log-and-debug/">Log and Debug</a></li> + <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> @@ -759,6 +793,10 @@ + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> @@ -840,6 +878,10 @@ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + </ul> @@ -896,29 +938,6 @@ <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> - - <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> - - - </ul> - - </ul> </div> http://git-wip-us.apache.org/repos/asf/drill-site/blob/9833d32c/docs/progress-reports/index.html ---------------------------------------------------------------------- diff --git a/docs/progress-reports/index.html b/docs/progress-reports/index.html index 006db62..4767c45 100644 --- a/docs/progress-reports/index.html +++ b/docs/progress-reports/index.html @@ -70,6 +70,8 @@ <li><a href="/docs/develop-custom-functions/">Develop Custom Functions</a></li> + <li><a href="/docs/troubleshooting/">Troubleshooting</a></li> + <li><a href="/docs/developer-information/">Developer Information</a></li> <li><a href="/docs/release-notes/">Release Notes</a></li> @@ -82,8 +84,6 @@ <li><a href="/docs/project-bylaws/">Project Bylaws</a></li> - <li><a href="/docs/log-and-debug/">Log and Debug</a></li> - </ul> </li> <li class='nav'> @@ -150,6 +150,10 @@ + <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li> @@ -540,11 +544,41 @@ </ul> + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> + + </ul> + + </ul> - <li class="toctree-l1"><a class="reference internal" href="/docs/log-and-debug/">Log and Debug</a></li> + <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> @@ -759,6 +793,10 @@ + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> @@ -840,6 +878,10 @@ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + </ul> @@ -896,29 +938,6 @@ <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> - - <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> - - - </ul> - - </ul> </div> http://git-wip-us.apache.org/repos/asf/drill-site/blob/9833d32c/docs/project-bylaws/index.html ---------------------------------------------------------------------- diff --git a/docs/project-bylaws/index.html b/docs/project-bylaws/index.html index 3be9274..1655e33 100644 --- a/docs/project-bylaws/index.html +++ b/docs/project-bylaws/index.html @@ -70,6 +70,8 @@ <li><a href="/docs/develop-custom-functions/">Develop Custom Functions</a></li> + <li><a href="/docs/troubleshooting/">Troubleshooting</a></li> + <li><a href="/docs/developer-information/">Developer Information</a></li> <li><a href="/docs/release-notes/">Release Notes</a></li> @@ -82,8 +84,6 @@ <li><a href="/docs/project-bylaws/">Project Bylaws</a></li> - <li><a href="/docs/log-and-debug/">Log and Debug</a></li> - </ul> </li> <li class='nav'> @@ -150,6 +150,10 @@ + <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li> @@ -540,11 +544,41 @@ </ul> + + <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> + + </ul> + + </ul> - <li class="toctree-l1"><a class="reference internal" href="/docs/log-and-debug/">Log and Debug</a></li> + <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> + + + </ul> @@ -759,6 +793,10 @@ + <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> + + + <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> @@ -840,6 +878,10 @@ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + </ul> @@ -896,29 +938,6 @@ <li class="toctree-l1 current"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> - - <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="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> - - - - <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> - - - </ul> - - </ul> </div> @@ -1123,7 +1142,7 @@ project will be unavailable.</p> <div class="doc-nav"> - <span class="previous-toc"><a href="/docs/2014-q1-drill-report/">â 2014 Q1 Drill Report</a></span><span class="next-toc"><a href="/docs/log-and-debug/">Log and Debug â</a></span> + <span class="previous-toc"><a href="/docs/2014-q1-drill-report/">â 2014 Q1 Drill Report</a></span><span class="next-toc"></span> </div>
