| <!DOCTYPE html> |
| |
| |
| |
| <html lang="en"> |
| <head> |
| <!-- Global site tag (gtag.js) - Google Analytics --> |
| <script async src="https://www.googletagmanager.com/gtag/js?id=UA-61232409-1"></script> |
| <script> |
| window.dataLayer = window.dataLayer || []; |
| function gtag(){dataLayer.push(arguments);} |
| gtag('js', new Date()); |
| |
| gtag('config', 'UA-61232409-1'); |
| </script> |
| |
| |
| |
| <meta charset="UTF-8"> |
| <meta name="ignite-version" content="2.9.0" /> |
| <title>Distributed Joins | Ignite Documentation</title> |
| |
| <link rel="canonical" href="/docs/latest/SQL/distributed-joins" /> |
| |
| |
| <link rel="stylesheet" href="/assets/css/styles.css?1600377057"> |
| <link rel="stylesheet" href="/assets/css/asciidoc-pygments.css"> |
| <link rel="shortcut icon" href="/favicon.ico"> |
| <meta name='viewport' content='width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0'> |
| |
| <script type="text/javascript" src="/assets/js/anchor.min.js?1600377057"></script> |
| |
| <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" /> |
| |
| |
| </head> |
| <body> |
| <header> |
| <!--#include virtual="/includes/promotion_banner.html" --> |
| <div class="container"> |
| <button type='button' class='menu' title='Docs menu'> |
| <img src="/assets/images/menu-icon.svg"/> |
| </button> |
| <div class='home'> |
| <a href="/" class='home' title='Apache Ignite home'> |
| <img src="/assets/images/apache_ignite_logo.svg" alt="Apache Ignite logo" width="103" > |
| </a> |
| </div> |
| |
| <nav> |
| |
| </nav> |
| |
| <select id="version-selector"> |
| <option value="2.9.0">2.9.0</option> |
| </select> |
| |
| <a href="https://github.com/apache/ignite" title='GitHub' class='github' target="_blank"> |
| <img src="/assets/images/github-gray.svg" alt="GitHub logo"> |
| </a> |
| |
| <form class='search'> |
| <button class="search-close" type='button'><img src='/assets/images/cancel.svg'></button> |
| <input type="search" placeholder="Search…" id="search-input"> |
| </form> |
| <button type='button' class='search-toggle'><img src='/assets/images/search.svg'></button> |
| <button type='button' class='top-nav-toggle'>⋮</button> |
| |
| |
| |
| </div> |
| </header> |
| |
| |
| <link rel="stylesheet" href="/assets/css/docs.css"> |
| <section class='page-docs'> |
| |
| |
| |
| |
| <nav class='left-nav' data-swiftype-index='false'> |
| |
| |
| <li> |
| |
| |
| <a href="/docs/latest/preface" class='' >Preface</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Quick Start Guides<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/java" |
| |
| class='' |
| >Java</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/dotnet" |
| |
| class='' |
| >.NET/C#</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/cpp" |
| |
| class='' |
| >C++</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/python" |
| |
| class='' |
| >Python</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/nodejs" |
| |
| class='' |
| >Node.JS</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/sql" |
| |
| class='' |
| >SQL</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/php" |
| |
| class='' |
| >PHP</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/quick-start/restapi" |
| |
| class='' |
| >REST API</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="/installation" class='group-toggle collapsed '>Installation<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/installation/installing-using-zip" |
| |
| class='' |
| >Installing Using ZIP Archive</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/installation/installing-using-docker" |
| |
| class='' |
| >Installing Using Docker</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/installation/deb-rpm" |
| |
| class='' |
| >Installing DEB or RPM package</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Kubernetes<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//installation/kubernetes/amazon-eks-deployment" class=''>Amazon EKS</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//installation/kubernetes/azure-deployment" class=''>Azure Kubernetes Service</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//installation/kubernetes/gke-deployment" class=''>Google Kubernetes Engine</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Setting Up<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/setup" |
| |
| class='' |
| >Setting Up Ignite for Java</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/setup-dotnet" |
| |
| class='' |
| >Setting Up Ignite for .NET/C#</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/understanding-configuration" class='' >Understanding Configuration</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/logging" class='' >Configuring Logging</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/starting-nodes" class='' >Starting and Stopping Nodes</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/clustering" |
| |
| class='' |
| >Overview</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/tcp-ip-discovery" |
| |
| class='' |
| >TCP/IP Discovery</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/zookeeper-discovery" |
| |
| class='' |
| >ZooKeeper Discovery</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/discovery-in-the-cloud" |
| |
| class='' |
| >Discovery in the Cloud</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/network-configuration" |
| |
| class='' |
| >Network Configuration</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/connect-client-nodes" |
| |
| class='' |
| >Connecting Client Nodes</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/clustering/running-client-nodes-behind-nat" |
| |
| class='' |
| >Running Client Nodes Behind NAT</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Data Modeling<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-modeling/data-modeling" |
| |
| class='' |
| >Introduction</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-modeling/data-partitioning" |
| |
| class='' |
| >Data Partitioning</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-modeling/affinity-collocation" |
| |
| class='' |
| >Affinity Colocation</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/memory-architecture" |
| |
| class='' |
| >Memory Architecture</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/memory-configuration/data-regions" |
| |
| class='' |
| >Configuring Data Regions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/memory-configuration/eviction-policies" |
| |
| class='' |
| >Eviction Policies</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/configuration-overview" |
| |
| class='' |
| >Cache Configuration</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/configuring-backups" |
| |
| class='' |
| >Configuring Partition Backups</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/atomicity-modes" |
| |
| class='' |
| >Atomicity Modes</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/expiry-policies" |
| |
| class='' |
| >Expiry Policy</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/on-heap-caching" |
| |
| class='' |
| >On-Heap Caching</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/configuring-caches/cache-groups" |
| |
| class='' |
| >Cache Groups</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/native-persistence" |
| |
| class='' |
| >Ignite Persistence</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/external-storage" |
| |
| class='' |
| >External Storage</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/swap" |
| |
| class='' |
| >Swapping</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/custom-cache-store" |
| |
| class='' |
| >Implementing Custom Cache Store</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/snapshots" |
| |
| class='' |
| >Cluster Snapshots</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/disk-compression" |
| |
| class='' |
| >Disk Compression</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/persistence/persistence-tuning" |
| |
| class='' |
| >Tuning Persistence</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/baseline-topology" class='' >Baseline Topology</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/cluster-states" class='' >Cluster States</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/data-rebalancing" class='' >Data Rebalancing</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/partition-loss-policy" class='' >Partition Loss Policy</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/deploying-user-code" class='' >Deploying User Code</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/peer-class-loading" class='' >Peer Class Loading</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/data-streaming" class='' >Data Streaming</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Using Key-Value Cache API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/key-value-api/basic-cache-operations" |
| |
| class='' |
| >Basic Cache Operations</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/key-value-api/binary-objects" |
| |
| class='' |
| >Working with Binary Objects</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/key-value-api/using-scan-queries" |
| |
| class='' |
| >Using Scan Queries</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/read-repair" |
| |
| class='' |
| >Read Repair</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/key-value-api/continuous-queries" class='' >Using Continuous Queries</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/key-value-api/transactions" class='' >Performing Transactions</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/sql-introduction" |
| |
| class='' |
| >Introduction</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/schemas" |
| |
| class='' |
| >Understanding Schemas</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/indexes" |
| |
| class='' |
| >Defining Indexes</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/sql-api" |
| |
| class='' |
| >Using SQL API</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/distributed-joins" |
| |
| class='' |
| >Distributed Joins</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/sql-transactions" |
| |
| class='' |
| >SQL Transactions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/custom-sql-func" |
| |
| class='' |
| >Custom SQL Functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/JDBC/jdbc-driver" |
| |
| class='' |
| >JDBC Driver</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/JDBC/jdbc-client-driver" |
| |
| class='' |
| >JDBC Client Driver</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/transactions/mvcc" |
| |
| class='' |
| >Multiversion Concurrency Control</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Distributed Computing<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/distributed-computing" |
| |
| class='' |
| >Distributed Computing API</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/cluster-groups" |
| |
| class='' |
| >Cluster Groups</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/executor-service" |
| |
| class='' |
| >Executor Service</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/map-reduce" |
| |
| class='' |
| >MapReduce API</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/load-balancing" |
| |
| class='' |
| >Load Balancing</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/fault-tolerance" |
| |
| class='' |
| >Fault Tolerance</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/distributed-computing/job-scheduling" |
| |
| class='' |
| >Job Scheduling</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/collocated-computations" class='' >Colocating Computations with Data</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Working with Events<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/events/listening-to-events" |
| |
| class='' |
| >Enabling and Listenting to Events</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/events/events" |
| |
| class='' |
| >Events</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/near-cache" class='' >Near Caches</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/platform-cache" class='' >.NET Platform Cache</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/services/services" class='' >Services</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Distributed Data Structures<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-structures/queue-and-set" |
| |
| class='' |
| >Queue and Set</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-structures/atomic-types" |
| |
| class='' |
| >Atomic Types</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-structures/countdownlatch" |
| |
| class='' |
| >CountDownLatch</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-structures/atomic-sequence" |
| |
| class='' |
| >Atomic Sequence</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/data-structures/semaphore" |
| |
| class='' |
| >Semaphore</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Machine Learning<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/machine-learning" |
| |
| class='' |
| >Machine Learning</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/partition-based-dataset" |
| |
| class='' |
| >Partition Based Dataset</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/updating-trained-models" |
| |
| class='' |
| >Updating Trained Models</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/introduction" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/regression/introduction" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/regression/linear-regression" class=''>Linear Regression</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/clustering/introduction" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/preprocessing" |
| |
| class='' |
| >Preprocessing</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Model Selection<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/model-selection/introduction" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/model-selection/evaluator" class=''>Evaluator</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/multiclass-classification" |
| |
| class='' |
| >Multiclass Classification</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/ensemble-methods/introduction" class=''></a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/machine-learning/recommendation-systems" |
| |
| class='' |
| >Recommendation Systems</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/importing-model/introduction" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Monitoring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/monitoring-metrics/intro" |
| |
| class='' |
| >Introduction</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/monitoring-metrics/cluster-id" |
| |
| class='' |
| >Cluster ID and Tag</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Metrics<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//monitoring-metrics/configuring-metrics" class=''>Configuring Metrics</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//monitoring-metrics/metrics" class=''>JMX Metrics</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>New Metrics System<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//monitoring-metrics/new-metrics-system" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//monitoring-metrics/new-metrics" class=''>Metrics</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/monitoring-metrics/system-views" |
| |
| class='' |
| >System Views</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/monitoring-metrics/tracing" |
| |
| class='' |
| >Tracing</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="/security" class='group-toggle collapsed '>Security<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/security/authentication" |
| |
| class='' |
| >Authentication</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/security/ssl-tls" |
| |
| class='' |
| >SSL/TLS</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Transparent Data Encryption<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//security/tde" class=''>Introduction</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//security/master-key-rotation" class=''>Master key rotation</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Thin Clients<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/getting-started-with-thin-clients" |
| |
| class='' |
| >Thin Clients Overview</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/java-thin-client" |
| |
| class='' |
| >Java Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/dotnet-thin-client" |
| |
| class='' |
| >.NET Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/cpp-thin-client" |
| |
| class='' |
| >C++ Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/python-thin-client" |
| |
| class='' |
| >Python Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/php-thin-client" |
| |
| class='' |
| >PHP Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/thin-clients/nodejs-thin-client" |
| |
| class='' |
| >Node.js Thin Client</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| |
| |
| <button |
| type='button' |
| class='collapsed '>Binary Client Protocol<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class="sub_pages collapsed"> |
| |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/binary-client-protocol" class=''>Binary Client Protocol</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/data-format" class=''>Data Format</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li> |
| |
| |
| |
| <li><a href="/docs/latest//binary-client-protocol/cache-configuration" class=''>Cache Configuration</a></li> |
| |
| </nav> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>ODBC Driver<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/odbc-driver" |
| |
| class='' |
| >ODBC Driver</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/connection-string-dsn" |
| |
| class='' |
| >Connection String and DSN</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/querying-modifying-data" |
| |
| class='' |
| >Querying and Modifying Data</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/specification" |
| |
| class='' |
| >Specification</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/data-types" |
| |
| class='' |
| >Data Types</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/error-codes" |
| |
| class='' |
| >Error Codes</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/restapi" class='' >REST API</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/control-script" class='' >Control Script</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/plugins" class='' >Plugins</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| <a href="/docs/latest/sqlline" class='' >SQLLine</a> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="" class='group-toggle collapsed '>Ignite for Spark<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/overview" |
| |
| class='' |
| >Overview</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/ignitecontext-and-rdd" |
| |
| class='' |
| >IgniteContext and IgniteRDD</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/ignite-dataframe" |
| |
| class='' |
| >Ignite DataFrame</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/installation" |
| |
| class='' |
| >Installation</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/spark-shell" |
| |
| class='' |
| >Test Ignite with Spark-shell</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/troubleshooting" |
| |
| class='' |
| >Troubleshooting</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| <li> |
| |
| |
| |
| |
| |
| |
| <button type='button' data-guide-url="/sql-reference/sql-reference-overview" class='group-toggle collapsed '>SQL Reference<img class="state-indicator" src="/assets/images/left-nav-arrow.svg"></button> |
| <nav class='nav-group collapsed'> |
| |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/sql-conformance" |
| |
| class='' |
| >SQL Conformance</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/ddl" |
| |
| class='' |
| >Data Definition Language (DDL)</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/dml" |
| |
| class='' |
| >Data Manipulation Language (DML)</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/transactions" |
| |
| class='' |
| >Transactions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/operational-commands" |
| |
| class='' |
| >Operational Commands</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/aggregate-functions" |
| |
| class='' |
| >Aggregate functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/numeric-functions" |
| |
| class='' |
| >Numeric Functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/string-functions" |
| |
| class='' |
| >String Functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/date-time-functions" |
| |
| class='' |
| >Data and Time Functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/system-functions" |
| |
| class='' |
| >System Functions</a> |
| |
| </li> |
| |
| |
| |
| |
| |
| <li> |
| |
| <a href="/docs/latest/sql-reference/data-types" |
| |
| class='' |
| >Data Types</a> |
| |
| </li> |
| |
| |
| |
| </nav> |
| |
| </li> |
| |
| </nav> |
| <div class="left-nav__overlay"></div> |
| |
| |
| <article data-swiftype-index='true'> |
| <a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/SQL/distributed-joins.adoc" target="_blank">Edit</a> |
| |
| <h1>Distributed Joins</h1> |
| |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>A distributed join is a SQL statement with a join clause that combines two or more partitioned tables. |
| If the tables are joined on the partitioning column (affinity key), the join is called a <em>colocated join</em>. Otherwise, it is called a <em>non-colocated join</em>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Colocated joins are more efficient because they can be effectively distributed between the cluster nodes.</p> |
| </div> |
| <div class="paragraph"> |
| <p>By default, Ignite treats each join query as if it is a colocated join and executes it accordingly (see the corresponding section below).</p> |
| </div> |
| <div class="admonitionblock warning"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Warning</div> |
| </td> |
| <td class="content"> |
| If your query is non-colocated, you have to enable the non-colocated mode of query execution by setting <code>SqlFieldsQuery.setDistributedJoins(true)</code>; otherwise, the results of the query execution may be incorrect. |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="admonitionblock caution"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Caution</div> |
| </td> |
| <td class="content"> |
| <div class="paragraph"> |
| <p>If you often join tables, we recommend that you partition your tables on the same column (on which you join the tables).</p> |
| </div> |
| <div class="paragraph"> |
| <p>Non-colocated joins should be reserved for cases when it’s impossible to use colocated joins.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="colocated-joins">Colocated Joins</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The following image illustrates the procedure of executing a colocated join. A colocated join (<code>Q</code>) is sent to all the nodes that store the data matching the query condition. Then the query is executed over the local data set on each node (<code>E(Q)</code>). The results (<code>R</code>) are aggregated on the node that initiated the query (the client node).</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="/docs/2.9.0/images/collocated_joins.png" alt="collocated joins"> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="non-colocated-joins">Non-colocated Joins</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>If you execute a query in a non-colocated mode, the SQL Engine executes the query locally on all the nodes that store the data matching the query condition. But because the data is not colocated, each node will request missing data (that is not present locally) from other nodes by sending either broadcast or unicast requests. This process is depicted on the image below.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="/docs/2.9.0/images/non_collocated_joins.png" alt="non collocated joins"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>If the join is done on the primary or affinity key, the nodes send unicast requests because in this case the nodes know the location of the missing data. Otherwise, nodes send broadcast requests. For performance reasons, both broadcast and unicast requests are aggregated into batches.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Enable the non-colocated mode of query execution by setting a JDBC/ODBC parameter or, if you use SQL API, by calling <code>SqlFieldsQuery.setDistributedJoins(true)</code>.</p> |
| </div> |
| <div class="admonitionblock warning"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Warning</div> |
| </td> |
| <td class="content"> |
| If you use a non-collocated join on a column from a <a href="/docs/latest/data-modeling/data-partitioning#replicated">replicated table</a>, the column must have an index. |
| Otherwise, you will get an exception. |
| </td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="hash-joins">Hash Joins</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>To boost performance of join queries, Ignite supports the <a href="https://en.wikipedia.org/wiki/Hash_join">hash join |
| algorithm</a>. |
| Hash joins can be more efficient than nested loop joins for many scenarios, except when the probe side of the join is very small. |
| However, hash joins can only be used with equi-joins, i.e. a type of join with equality comparison in the join-predicate.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To enforce the use of hash joins:</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>Use the <code>enforceJoinOrder</code> option:</p> |
| <code-tabs><code-tab data-tab='Java API'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">SqlFieldsQuery</span> <span class="n">query</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">SqlFieldsQuery</span><span class="o">(</span> |
| <span class="s">"SELECT * FROM TABLE_A, TABLE_B USE INDEX(HASH_JOIN_IDX)"</span> |
| <span class="o">+</span> <span class="s">" WHERE TABLE_A.column1 = TABLE_B.column2"</span><span class="o">).</span><span class="na">setEnforceJoinOrder</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='JDBC'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">Class</span><span class="o">.</span><span class="na">forName</span><span class="o">(</span><span class="s">"org.apache.ignite.IgniteJdbcThinDriver"</span><span class="o">);</span> |
| |
| <span class="c1">// Open the JDBC connection.</span> |
| <span class="nc">Connection</span> <span class="n">conn</span> <span class="o">=</span> <span class="nc">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="s">"jdbc:ignite:thin://127.0.0.1?enforceJoinOrder=true"</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='C#/.NET'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="csharp"><span class="kt">var</span> <span class="n">query</span> <span class="p">=</span> <span class="k">new</span> <span class="nf">SqlFieldsQuery</span><span class="p">(</span><span class="s">"SELECT * FROM TABLE_A, TABLE_B USE INDEX(HASH_JOIN_IDX) WHERE TABLE_A.column1 = TABLE_B.column2"</span><span class="p">)</span> |
| <span class="p">{</span> |
| <span class="n">EnforceJoinOrder</span> <span class="p">=</span> <span class="k">true</span> |
| <span class="p">};</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='C++'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="c++"><span class="n">SqlFieldsQuery</span> <span class="n">query</span> <span class="o">=</span> <span class="n">SqlFieldsQuery</span><span class="p">(</span><span class="s">"SELECT * FROM TABLE_A, TABLE_B USE INDEX(HASH_JOIN_IDX) WHERE TABLE_A.column1 = TABLE_B.column2"</span><span class="p">);</span> |
| <span class="n">query</span><span class="p">.</span><span class="n">SetEnforceJoinOrder</span><span class="p">(</span><span class="nb">true</span><span class="p">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </li> |
| <li> |
| <p>Specify <code>USE INDEX(HASH_JOIN_IDX)</code> on the table for which you want to create the hash-join index:</p> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="sql"><span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">TABLE_A</span><span class="p">,</span> <span class="n">TABLE_B</span> <span class="n">USE</span> <span class="k">INDEX</span><span class="p">(</span><span class="n">HASH_JOIN_IDX</span><span class="p">)</span> <span class="k">WHERE</span> <span class="n">TABLE_A</span><span class="p">.</span><span class="n">column1</span> <span class="o">=</span> <span class="n">TABLE_B</span><span class="p">.</span><span class="n">column2</span></code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </li> |
| </ol> |
| </div> |
| </div> |
| </div> |
| <div class="copyright"> |
| © 2020 The Apache Software Foundation.<br/> |
| Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation. |
| |
| </div> |
| |
| </article> |
| <nav class="right-nav" data-swiftype-index='false'> |
| <ul class="sectlevel1"> |
| <li><a href="#colocated-joins">Colocated Joins</a></li> |
| <li><a href="#non-colocated-joins">Non-colocated Joins</a></li> |
| <li><a href="#hash-joins">Hash Joins</a></li> |
| </ul> |
| |
| |
| <footer> |
| </footer> |
| |
| </nav> |
| |
| </section> |
| <script type='module' src='/assets/js/code-copy-to-clipboard.js' async crossorigin></script> |
| |
| <script> |
| // inits deep anchors -- needs to be done here because of https://www.bryanbraun.com/anchorjs/#dont-run-it-too-late |
| anchors.add('.page-docs h1, .page-docs h2, .page-docs h3:not(.discrete), .page-docs h4, .page-docs h5'); |
| anchors.options = { |
| placement: 'right', |
| visible: 'always' |
| }; |
| </script> |
| <!-- load google fonts async --> |
| <script type="text/javascript"> |
| WebFontConfig = { |
| google: { families: [ 'Open+Sans:300,400,600,700&display=swap' ] } |
| }; |
| (function() { |
| var wf = document.createElement('script'); |
| wf.src = 'https://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js'; |
| wf.type = 'text/javascript'; |
| wf.async = 'true'; |
| var s = document.getElementsByTagName('script')[0]; |
| s.parentNode.insertBefore(wf, s); |
| })(); </script> |
| <script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script> |
| <script> |
| docsearch({ |
| // Your apiKey and indexName will be given to you once |
| // we create your config |
| apiKey: '3eee686c0ebe39eff3baeb18c56fa5f8', |
| indexName: 'apache_ignite', |
| // Replace inputSelector with a CSS selector |
| // matching your search input |
| inputSelector: '#search-input', |
| // algoliaOptions: { 'facetFilters': ["version:$VERSION"] }, |
| |
| // Set debug to true to inspect the dropdown |
| debug: false, |
| }); |
| </script> |
| <script type='module' src='/assets/js/index.js?1600377057' async crossorigin></script> |
| <script type='module' src='/assets/js/versioning.js?1600377057' async crossorigin></script> |
| </body> |
| |
| </html> |
