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Apache Druid v29.0 Documentation
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JDBC connector

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    • Apache Druid v31.0 Documentation
    • Apache Druid v30.0 Documentation
    • Apache Druid v29.0 Documentation
    • Apache Druid v28.0 Documentation
    • Apache Druid v27.0 Documentation
    • Apache Druid v26.0 Documentation
    • Apache Druid v25.0 Documentation
    • Apache Druid v24.0 Documentation
    • Apache Druid v0.23.0 Documentation
    • Apache Druid v0.22.1 Documentation
    • Apache Druid v0.22.0 Documentation
    • Apache Druid v0.21.1 Documentation
    • Apache Druid v0.21.0 Documentation
    • Apache Druid v0.20.2 Documentation
    • Apache Druid v0.20.1 Documentation
    • Apache Druid v0.20.0 Documentation
    • Apache Druid v0.19.0 Documentation
    • Apache Druid v0.18.1 Documentation
    • Apache Druid v0.18.0 Documentation
    • Apache Druid v0.17.1 Documentation
    • Getting started
      • Introduction to Apache Druid
      • Quickstart (local)
      • Single server deployment
      • Clustered deployment
    • Tutorials
      • Load files using SQL
      • Load from Apache Kafka
      • Load from Apache Hadoop
      • Query data
      • Aggregate data with rollup
      • Theta sketches
      • Configure data retention
      • Update existing data
      • Compact segments
      • Deleting data
      • Write an ingestion spec
      • Transform input data
      • Convert ingestion spec to SQL
      • Run with Docker
      • Kerberized HDFS deep storage
      • Get to know Query view
      • Unnesting arrays
      • Query from deep storage
      • JDBC connector
    • Design
      • Architecture
      • Services
        • Coordinator
        • Overlord
        • Broker
        • Router
        • Historical
        • MiddleManager
        • Peon
        • Indexer
      • Storage
      • Segments
      • Deep storage
      • Metadata storage
      • ZooKeeper
    • Ingestion
      • Overview
      • Ingestion concepts
        • Source input formats
        • Input sources
        • Schema model
        • Rollup
        • Partitioning
        • Task reference
      • SQL-based batch
        • SQL-based ingestion
        • Key concepts
        • Security
        • Examples
        • Reference
        • Known issues
      • Streaming
        • Streaming ingestion
        • Supervisor
        • Apache Kafka ingestion
        • Amazon Kinesis ingestion
      • Classic batch
        • JSON-based batch
        • Hadoop-based
      • Ingestion spec reference
      • Schema design tips
      • Concurrent append and replace
      • Troubleshooting FAQ
    • Data management
      • Overview
      • Data updates
      • Data deletion
      • Schema changes
      • Compaction
        • Automatic compaction
        • Manual compaction
    • Querying
      • Druid SQL
        • Overview and syntax
        • Tips for writing good queries
        • Query from deep storage
        • SQL data types
        • Operators
        • Scalar functions
        • Aggregation functions
        • Window functions
        • Array functions
        • Multi-value string functions
        • JSON functions
        • All functions
        • SQL query context
        • SQL metadata tables
        • SQL query translation
      • Native queries
      • Query processing
      • Query execution
      • Troubleshooting
      • Concepts
        • Datasources
        • Joins
        • Lookups
        • Multi-value dimensions
        • Arrays
        • Nested columns
        • Multitenancy
        • Query caching
        • Using query caching
        • Query context
      • Native query types
        • Timeseries
        • TopN
        • GroupBy
        • Scan
        • Search
        • TimeBoundary
        • SegmentMetadata
        • DatasourceMetadata
      • Native query components
        • Filters
        • Granularities
        • Dimensions
        • Aggregations
        • Post-aggregations
        • Expressions
        • Having filters (groupBy)
        • Sorting and limiting (groupBy)
        • Sorting (topN)
        • String comparators
        • Virtual columns
        • Spatial filters
    • API reference
      • Overview
      • HTTP APIs
        • Druid SQL
        • SQL-based ingestion
        • JSON querying
        • Tasks
        • Supervisors
        • Retention rules
        • Data management
        • Automatic compaction
        • Lookups
        • Service status
        • Dynamic configuration
        • Legacy metadata
      • Java APIs
        • SQL JDBC driver
    • Configuration
      • Configuration reference
      • Extensions
      • Logging
    • Operations
      • Web console
      • Java runtime
      • Durable storage
      • Security
        • Security overview
        • User authentication and authorization
        • LDAP auth
        • Password providers
        • Dynamic Config Providers
        • TLS support
      • Performance tuning
        • Basic cluster tuning
        • Segment size optimization
        • Mixed workloads
        • HTTP compression
        • Automated metadata cleanup
      • Monitoring
        • Request logging
        • Metrics
        • Alerts
      • High availability
      • Rolling updates
      • Using rules to drop and retain data
      • Migrate from firehose
      • Working with different versions of Apache Hadoop
      • Misc
        • dump-segment tool
        • reset-cluster tool
        • insert-segment-to-db tool
        • pull-deps tool
        • Deep storage migration
        • Export Metadata Tool
        • Metadata Migration
        • Content for build.sbt
    • Development
      • Developing on Druid
      • Creating extensions
      • JavaScript functionality
      • Build from source
      • Versioning
      • Contribute to Druid docs
      • Experimental features
    • Misc
      • Papers
    • Release info
      • Release notes
      • Upgrade notes
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