Using the JDBC Driver - Apache Drill

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internal" href="/docs/summary/">Summary</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-social-media/">Analyzing Social Media</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-data-using-window-functions/">Analyzing Data Using Window Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/orchestrating-queries-with-airflow/">Orchestrating queries with Airflow</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Drill-on-YARN</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/drill-on-yarn-introduction/">Drill-on-YARN Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/creating-a-basic-drill-cluster/">Creating a Basic Drill Cluster</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/launch-drill-under-yarn/">Launch Drill Under YARN</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/configuration-reference/">Configuration Reference</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/drill-on-yarn-command-line-tool/">Drill-on-YARN Command-Line Tool</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-drill-on-yarn-web-ui/">Using the Drill-on-YARN Web UI</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/multiple-drill-clusters/">Multiple Drill Clusters</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/enabling-web-ui-security/">Enabling Web UI Security</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-a-release-note-issues/">Appendix A: Release Note Issues</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-b-drill-env-sh-settings/">Appendix B: drill-env.sh Settings</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-c-troubleshooting/">Appendix C: Troubleshooting</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/migrating-parquet-data/">Migrating Parquet Data</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/running-drill-on-docker/">Running Drill on Docker</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li> <li class="toctree-l3"><a class="reference 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> <li class="toctree-l2"><a class="reference internal" href="/docs/starting-the-web-ui/">Starting the Web UI</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/stopping-drill/">Stopping Drill</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/identifying-multiple-drill-versions-in-a-cluster/">Identifying Multiple Drill Versions in a Cluster</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Extended</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-in-distributed-mode-with-gcp-dataproc/">Installing Drill in Distributed Mode with GCP Dataproc</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);">Securing Drill</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/securing-drill-introduction/">Securing Drill Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/secure-communication-paths/">Secure Communication Paths</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/roles-and-privileges/">Roles and Privileges</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-inbound-impersonation/">Configuring Inbound Impersonation</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-user-security/">Configuring User Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-plain-security/">Configuring Plain Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-ssl-tls-for-encryption/">Configuring SSL/TLS for Encryption</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-libpam4j-as-the-pam-authenticator/">Using libpam4j as the PAM Authenticator</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-jpam-as-the-pam-authenticator/">Using jpam as the PAM Authenticator</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-htpasswd-file-authentication/">Configuring htpasswd file authentication</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-hashicorp-vault-authentication/">Configuring HashiCorp Vault authentication</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-kerberos-security/">Configuring Kerberos Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-drill-to-use-spnego-for-http-authentication/">Configuring Drill to use SPNEGO for HTTP Authentication</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-web-ui-and-rest-api-security/">Configuring Web UI and REST API Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-custom-acls-to-secure-znodes/">Configuring Custom ACLs to Secure znodes</a></li> </ul> <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 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> <li class="toctree-l3"><a class="reference internal" href="/docs/global-query-list/">Global Query List</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/ports-and-bind-addresses-used-by-drill/">Ports and Bind Addresses 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> <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-cgroups-to-control-cpu-usage/">Configuring cgroups to Control CPU Usage</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-basics/">Plugin Configuration Basics</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-storage-plugins/">Configuring Storage Plugins</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/storage-plugin-authentication-modes/">Storage plugin authentication modes</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/drill-default-input-format/">Drill Default Input Format</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/rdbms-storage-plugin/">RDBMS Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-storage-plugin/">MongoDB Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/s3-storage-plugin/">S3 Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/oci-os-storage-plugin/">OCI OS Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/opentsdb-storage-plugin/">OpenTSDB Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/kafka-storage-plugin/">Kafka Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/azure-blob-storage-plugin/">Azure Blob Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/druid-storage-plugin/">Druid Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/http-storage-plugin/">HTTP Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/elasticsearch-storage-plugin/">ElasticSearch Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/splunk-storage-plugin/">Splunk Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/cassandra-storage-plugin/">Cassandra Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/dropbox-storage-plugin/">Dropbox Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/google-sheets-storage-plugin/">Google Sheets Storage Plugin</a></li> </ul> <li class="toctree-l1 current_section "><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li> <ul class="current_section"> <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li> <li class="toctree-l2 current"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</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);">Installing the ODBC Driver</a></li> <ul style="display: none"> <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/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/logging-and-tracing/">Logging and Tracing</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</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 Drill Explorer</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</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-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-10-2/">Using Apache Drill with Tableau 10.2</a></li> <li class="toctree-l3"><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-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-information-builders-webfocus-with-apache-drill/">Using Information Builders’ WebFOCUS with Apache Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li> </ul> </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-avro-files/">Querying Avro Files</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> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</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 href="javascript: void(0);">Querying Indexes</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-indexes-introduction/">Querying Indexes Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/queries-that-qualify-for-index-based-query-plans/">Queries that Qualify for Index-Based Query Plans</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/types-of-indexes/">Types of Indexes</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/index-selection/">Index Selection</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/designing-indexes-for-your-queries/">Designing Indexes for Your Queries</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-index-planning/">Configuring Index Planning</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/verifying-index-use/">Verifying Index Use</a></li> </ul> <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"><a href="javascript: void(0);">Performance Tuning</a></li> <ul style="display: none"> <li class="toctree-l2"><a href="javascript: void(0);">Drill Metastore</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-metastore/">Using Drill Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drill-iceberg-metastore/">Drill Iceberg Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/rdbms-metastore/">RDBMS Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/mongo-metastore/">Mongo Metastore</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/asynchronous-parquet-reader/">Asynchronous Parquet Reader</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-filter-pushdown/">Parquet Filter Pushdown</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hive-metadata-caching/">Hive Metadata Caching</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/throttling/">Throttling</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="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> <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-metrics/">Monitoring Metrics</a></li> </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> <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</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/statistical/">Statistical</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/data-type-functions/">Data Type Functions</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> <li class="toctree-l3"><a class="reference internal" href="/docs/phonetic-functions/">Phonetic Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/string-distance-functions/">String Distance Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/cryptography-functions/">Cryptography Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sql-dialect-compatibility-functions/">SQL dialect compatibility functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/gis-functions/">GIS functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/time-series-analysis-functions/">Time Series Analysis Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/ip-networking-functions/">IP Networking functions</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="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</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> <li class="toctree-l3"><a class="reference internal" href="/docs/list-creation-functions/">COLLECT_LIST</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/analyze-table-refresh-metadata/">ANALYZE TABLE REFRESH METADATA</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/analyze-table-compute-statistics/">ANALYZE TABLE COMPUTE STATISTICS</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/refresh-table-metadata/">REFRESH TABLE METADATA</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</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-or-replace-schema/">CREATE OR REPLACE SCHEMA</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-temporary-table-as-cttas/">CREATE TEMPORARY TABLE AS (CTTAS)</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-function-using-jar/">CREATE FUNCTION USING JAR</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</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/describe/">DESCRIBE</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drop-function-using-jar/">DROP FUNCTION USING JAR</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</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/explain/">EXPLAIN</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/lateral-join/">LATERAL Join</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-list/">SELECT List</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/set-operators/">Set Operators</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</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> <li class="toctree-l3"><a class="reference internal" href="/docs/pivot-operators/">Pivot Operators</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/logfile-plugin/">Logfile Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/sequence-files/">Sequence Files</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/httpd-format-plugin/">HTTPD Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/image-metadata-format-plugin/">Image Metadata Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/syslog-format-plugin/">Syslog Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/ltsv-format-plugin/">LTSV Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/spss-format-plugin/">SPSS Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/esri-shapefile-format-plugin/">ESRI Shapefile Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/excel-format-plugin/">Excel Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hdf5-format-plugin/">HDF5 Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/ms-access-format-plugin/">Microsoft Access Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/xml-format-plugin/">XML Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/iceberg-format-plugin/">Iceberg Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/delta-lake-format-plugin/">Delta Lake Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/sas-format-plugin/">SAS Format Plugin</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/developing-a-simple-function/">Developing a Simple Function</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: 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 href="javascript: void(0);">Adding Custom Functions to Drill</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/adding-custom-functions-to-drill-introduction/">Adding Custom Functions to Drill Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/manually-adding-custom-functions-to-drill/">Manually Adding Custom Functions to Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/creating-custom-authenticators/">Creating Custom Authenticators</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/dynamic-udfs/">Dynamic UDFs</a></li> </ul> <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);">REST API</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/rest-api-introduction/">REST API Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/submitting-queries-from-the-rest-api-when-impersonation-is-enabled-and-authentication-is-disabled/">Submitting Queries from the REST API when Impersonation is Enabled and Authentication is Disabled</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/use-postman-to-run-sql-queries-on-drill-data-sources/">Use Postman to Run SQL Queries on Drill Data Sources</a></li> </ul> <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/useful-information-for-drill-developers/">Useful Information for Drill Developers</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 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href="/docs/odbc-jdbc-interfaces/">ODBC/JDBC Interfaces</a></li> <li>Using the JDBC Driver</li> </nav> <div class="main-content-wrapper"> <div class="main-content"> <a class="edit-link" href="https://github.com/apache/drill-site/blob/master/_docs/en/odbc-jdbc-interfaces/015-using-jdbc-driver.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a> <div class="int_title left"> <h1>Using the JDBC Driver</h1> </div>  <div class="int_text" align="left"> <p>This section explains how to install and use the JDBC driver for Apache Drill. To use the JDBC driver, you have to:</p> <ol> <li><a href="/docs/using-the-jdbc-driver/#prerequisites">Meet prerequisites</a>.</li> <li><a href="/docs/using-the-jdbc-driver/#getting-the-drill-jdbc-driver">Get the Drill JDBC Driver</a>.</li> <li>Put the Drill JDBC jar file on the classpath.</li> <li>Use a <a href="/docs/using-the-jdbc-driver/#using-the-jdbc-url-for-a-random-drillbit-connection">valid URL</a> in the JDBC connection string when you write application code or configure BI tools.</li> <li>Use the <a href="/docs/using-the-jdbc-driver/#using-the-drill-driver-class-name">name of the Drill driver class</a> in application code or in the configuration of client tools.</li> </ol> <p>Most client tools provide a UI where you can enter all of the required connection information, including the driver location, connection URL, and driver class name. For specific examples of client tool connections to Drill through JDBC, see <a href="/docs/using-jdbc-with-squirrel-on-windows">Using JDBC with SQuirreL</a> and <a href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Spotfire Server</a>.</p> <h2 id="prerequisites">Prerequisites</h2> <ul> <li>JRE 8 or JDK 8</li> <li><a href="/docs/install-drill/">A Drill installation</a></li> <li>Capability to resolve the actual host name of the Drill node(s) with the IP(s), as described in step 4 of <a href="/docs/configuring-jreport-with-drill/#step-1:-install-the-drill-jdbc-driver-with-jreport">Install the Drill JDBC Driver with JReport</a>.</li> </ul> <h2 id="getting-the-drill-jdbc-driver">Getting the Drill JDBC Driver</h2> <p>The Drill JDBC Driver <code class="language-plaintext highlighter-rouge">JAR</code> file must exist on a client machine so you can configure the driver for the application or third-party tool that you intend to use. Obtain the driver in one of the following ways:</p> <ul> <li> <p>Copy the <code class="language-plaintext highlighter-rouge">drill-jdbc-all</code> JAR file from the following Drill installation directory on a node where Drill is installed to a directory on your client machine: <code class="language-plaintext highlighter-rouge"><drill_installation_directory>/jars/jdbc-driver/drill-jdbc-all-<version>.jar</code></p> <p>Or</p> </li> <li> <p>Download a <a href="https://apache.osuosl.org/drill/">TAR file for the latest Drill release</a> to a location on your client machine, and extract the file. On Windows, you may need to use a decompression utility, such as <a href="http://www.7-zip.org/">7-zip</a>. The driver is extracted to the following directory: <code class="language-plaintext highlighter-rouge"><drill-installation_directory>/jars/jdbc-driver/drill-jdbc-all-<version>.jar</code></p> </li> </ul> <h2 id="using-the-jdbc-url-for-a-random-drillbit-connection">Using the JDBC URL for a Random Drillbit Connection</h2> <p>The format of the JDBC URL differs slightly, depending on the way you want to connect to the Drillbit: random, local, or direct. This section covers using the URL for a random or local connection. Using a URL to <a href="/docs/using-the-jdbc-driver/#using-the-jdbc-url-format-for-a-direct-drillbit-connection">directly connect to a Drillbit</a> is covered later. If you want ZooKeeper to randomly choose a Drillbit in the cluster, or if you want to connect to the local Drillbit, the format of the driver URL is:</p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:zk=<zk name>[:<port>][,<zk name2>[:<port>]... </code> <code class="language-plaintext highlighter-rouge"><directory>/<cluster ID>;[schema=<storage plugin>]</code></p> <p>where</p> <ul> <li><code class="language-plaintext highlighter-rouge">jdbc</code> is the connection type. Required.</li> <li><code class="language-plaintext highlighter-rouge">schema</code> is the name of a <a href="/docs/storage-plugin-registration">storage plugin</a> configuration to use as the default for queries. For example,<code class="language-plaintext highlighter-rouge">schema=hive</code>. Optional.</li> <li><code class="language-plaintext highlighter-rouge">zk name</code> specifies one or more ZooKeeper host names, or IP addresses. Use <code class="language-plaintext highlighter-rouge">local</code> instead of a host name or IP address to connect to the local Drillbit. Required.</li> <li><code class="language-plaintext highlighter-rouge">port</code> is the ZooKeeper port number. Port 2181 is the default. On a MapR cluster, the default is 5181. Optional.</li> <li><code class="language-plaintext highlighter-rouge">directory</code> is the Drill directory in ZooKeeper, which by default is <code class="language-plaintext highlighter-rouge">/drill</code>. Optional.</li> <li><code class="language-plaintext highlighter-rouge">cluster ID</code> is <code class="language-plaintext highlighter-rouge">drillbits1</code> by default. If the default has changed, <a href="/docs/using-the-jdbc-driver/#determining-the-cluster-id">determine the cluster ID</a> and use it. Optional.</li> </ul> <h3 id="determining-the-cluster-id">Determining the Cluster ID</h3> <p>To determine the cluster ID, check the following file:</p> <p><code class="language-plaintext highlighter-rouge"><drill-installation>/conf/drill-override.conf</code></p> <p>For example:</p> <p><code class="language-plaintext highlighter-rouge">... drill.exec: { cluster-id: "docs41cluster-drillbits", zk.connect: "centos23.lab:5181,centos28.lab:5181,centos29.lab:5181" } ...</code></p> <h3 id="url-examples">URL Examples</h3> <p><strong>Single-Node Installation</strong></p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:zk=maprdemo:5181</code></p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:zk=centos23.lab:2181/drill/docs41cluster-drillbits</code></p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:zk=10.10.100.56:2181/drill/drillbits1;schema=hive</code></p> <p><strong>Cluster Installation</strong></p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:zk=10.10.100.30:5181,10.10.100.31:5181,10.10.100.32:2181/drill/drillbits1;schema=hive</code></p> <h2 id="using-the-jdbc-url-format-for-a-direct-drillbit-connection">Using the JDBC URL Format for a Direct Drillbit Connection</h2> <p>If you want to connect directly to a Drillbit instead of using ZooKeeper to choose the Drillbit, replace <code class="language-plaintext highlighter-rouge">zk=<zk name></code> with <code class="language-plaintext highlighter-rouge">drillbit=<node name></code> as shown in the following URL:</p> <p><code class="language-plaintext highlighter-rouge">jdbc:drill:drillbit=<node name>[:<port>][,<node name2>[:<port>]... </code> <code class="language-plaintext highlighter-rouge"><directory>/<cluster ID>[schema=<storage plugin>]</code></p> <p>where</p> <p><code class="language-plaintext highlighter-rouge">drillbit=<node name></code> specifies one or more host names or IP addresses of cluster nodes running Drill.</p> <h3 id="the-tries-parameter">The <code class="language-plaintext highlighter-rouge">tries</code> Parameter</h3> <p>As of Drill 1.10, you can include the optional <code class="language-plaintext highlighter-rouge">tries=<value></code> parameter in the connection string, as shown in the following URL:</p> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jdbc:drill:drillbit=<node name>[:<port>][,<node name2>[:<port>]... <directory>/<cluster ID>;[schema=<storage plugin>];tries=5 </code></pre></div></div> <p>The “tries” option represents the maximum number of unique drillbits to which the client can try to establish a successful connection. The default value is 5. This option improves the fault tolerance in the Drill client when first trying to connect with a drillbit, which will then act as the Foreman (the node that drives the query).</p> <p>The order in which the client tries to connect to the drillbits may not occur in the order listed in the connection string. If the first try results in an authentication failure, the client does not attempt any additional tries. If the number of unique drillbits listed in the <code class="language-plaintext highlighter-rouge">drillbit</code> parameter is less than the “tries” value, the client tries to connect to each drillbit one time.</p> <p>For example, if there are three unique drillbits listed in the connection string, and the “tries” value is set to 5, the client can try to connect to each drillbit once, until a successful connection is made, as shown in the image below:</p> <p><img src="http://i.imgur.com/MJ9qChJ.png" alt="" /></p> <p>If the client cannot successfully connect to any of the drillbits, Drill returns a failure message.</p> <p>For definitions of other URL components, see <a href="/docs/using-the-jdbc-driver/#using-the-jdbc-url-for-a-random-drillbit-connection">Using the JDBC URL for a Random Drillbit Connection</a>.</p> <h2 id="using-the-drill-driver-class-name">Using the Drill Driver Class Name</h2> <p>The class name for the JDBC driver is <a href="/apidocs/org/apache/drill/jdbc/Driver.html">org.apache.drill.jdbc.Driver</a>. For details, see the Apache Drill JDBC Driver <a href="/apidocs/org/apache/drill/jdbc/package-summary.html">Javadoc</a>.</p> <p>Starting in Drill 1.16, the DrillStatement interface supports the setMaxRows method. The setMaxRows method sets a limit on the number of rows returned for a result set. The limit set is applied automatically at runtime. By default, there is no limit on the number of rows returned. See <a href="https://drill.apache.org/docs/planning-and-execution-options/#setting-an-auto-limit-on-the-number-of-rows-returned-for-result-sets">Setting an Auto Limit on the Number of Rows Returned for Result Sets</a>.</p> <p>Starting in 1.13, the DrillStatement interface supports the setQueryTimeout method. The setQueryTimeout method limits the amount of time that the JDBC driver allows a query to run before canceling the query. The setQueryTimeout method sets the number of seconds that the JDBC driver waits for a Statement object to execute before canceling it. By default, there is no limit on the amount of time allowed for a running statement to complete. When you configure a limit, an SQLTimeoutException is thrown if a statement exceeds the limit. A JDBC driver must apply this limit to the execute, executeQuery, and executeUpdate methods.</p> <h2 id="example-of-connecting-to-drill-programmatically">Example of Connecting to Drill Programmatically</h2> <p>The following sample code shows you how to use the class name in a snippet to connect to Drill using the Drill-Jdbc-all driver:</p> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Class.forName("org.apache.drill.jdbc.Driver"); Connection connection =DriverManager.getConnection("jdbc:drill:zk= node3.mynode.com:2181/drill/my_cluster_com-drillbits"); Statement st = connection.createStatement(); ResultSet rs = st.executeQuery("SELECT * from cp.`employee`"); while(rs.next()){ System.out.println(rs.getString(1)); } </code></pre></div></div> <h2 id="ensuring-the-completion-of-ctas-queries">Ensuring the completion of CTAS queries</h2> <p>When a JDBC client issues a CTAS (CREATE TABLE AS SELECT …) statement then Drill will return a record for each completed writer fragment containing the number of records that fragment wrote. These records are returned in the usual streaming fashion as writer fragments complete, their order being unknowable in advance. If the client application immediately closes its clientside JDBC resources after its call to Statement.executeQuery has returned as follows</p> <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Statement</span> <span class="n">ctasStatement</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="na">createStatement</span><span class="o">();</span> <span class="nc">ResultSet</span> <span class="n">ctasResults</span> <span class="o">=</span> <span class="n">ctasStatement</span><span class="o">.</span><span class="na">executeQuery</span><span class="o">(</span><span class="n">ctasQueryText</span><span class="o">);</span> <span class="n">ctasResults</span><span class="o">.</span><span class="na">close</span><span class="o">();</span> <span class="n">ctasStatement</span><span class="o">.</span><span class="na">close</span><span class="o">();</span> </code></pre></div></div> <p>then it may be that the CTAS statement is still executing, and that it is unintentionally cancelled before completing depending on luck with respect to timing.</p> <p>This unintended cancellation of the CTAS statement is usually benign if it spawned only one writer fragment, but if it spawned more than one then the chances increase that at least one writer will be interrupted before it has finished writing, resulting in incomplete or even corrupted output. Even the benign cases of such queries conclude in the CANCELLED state rather than the COMPLETED state resulting in misleading query logs and profiles.</p> <p>To have CTAS queries reliably run to completion the JDBC client should wait for all of the writer fragments to complete by scrolling through the returned ResultSet before closing it or the Statement that created it. Using try-with-resources syntax,</p> <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">try</span> <span class="o">(</span> <span class="nc">Statement</span> <span class="n">ctasStatement</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="na">createStatement</span><span class="o">();</span> <span class="nc">ResultSet</span> <span class="n">ctasResults</span> <span class="o">=</span> <span class="n">ctasStatement</span><span class="o">.</span><span class="na">executeQuery</span><span class="o">(</span><span class="n">ctasQueryText</span><span class="o">);</span> <span class="o">)</span> <span class="o">{</span> <span class="k">while</span> <span class="o">(</span><span class="n">ctasResults</span><span class="o">.</span><span class="na">next</span><span class="o">());</span> <span class="c1">// scroll through results to ensure that we wait for CTAS completion</span> <span class="o">}</span> </code></pre></div></div> <p>See also: the <code class="language-plaintext highlighter-rouge">exec.query.return_result_set_for_ddl</code> config option.</p> <div class="doc-nav"> <span class="previous-toc"><a href="/docs/interfaces-introduction/">← Interfaces Introduction</a></span><span class="next-toc"><a href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows →</a></span> </div> </div> </div> </div> </div> <p class="push"></p> <div id="footer" class="mw"> <div class="wrapper"> Copyright © 2012-2022 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. 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Using the JDBC Driver - Apache Drill