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| <a href="/docs/latest/distributed-computing/executor-service" |
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| class='' |
| >Executor Service</a> |
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| <li> |
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| <a href="/docs/latest/distributed-computing/map-reduce" |
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| class='' |
| >MapReduce API</a> |
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| <li> |
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| <a href="/docs/latest/distributed-computing/load-balancing" |
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| class='' |
| >Load Balancing</a> |
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| <li> |
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| <a href="/docs/latest/distributed-computing/fault-tolerance" |
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| class='' |
| >Fault Tolerance</a> |
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| <li> |
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| <a href="/docs/latest/distributed-computing/job-scheduling" |
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| class='' |
| >Job Scheduling</a> |
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| <a href="/docs/latest/collocated-computations" class='' >Colocating Computations with Data</a> |
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| <a href="/docs/latest/events/listening-to-events" |
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| class='' |
| >Enabling and Listenting to Events</a> |
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| <li> |
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| <a href="/docs/latest/events/events" |
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| <a href="/docs/latest/platform-cache" class='' >.NET Platform Cache</a> |
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| >CountDownLatch</a> |
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| <li><a href="/docs/latest//machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li> |
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| <li><a href="/docs/latest//machine-learning/clustering/introduction" class=''>Introduction</a></li> |
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| <li><a href="/docs/latest//machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li> |
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| <li><a href="/docs/latest//machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li> |
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| <li> |
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| <a href="/docs/latest/machine-learning/preprocessing" |
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| >Preprocessing</a> |
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| <li> |
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| <li><a href="/docs/latest//machine-learning/model-selection/introduction" class=''>Introduction</a></li> |
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| <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> |
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| <li><a href="/docs/latest//machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li> |
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| <li><a href="/docs/latest//machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li> |
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| <li> |
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| <a href="/docs/latest/machine-learning/multiclass-classification" |
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| class='' |
| >Multiclass Classification</a> |
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| <li> |
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| <li><a href="/docs/latest//machine-learning/ensemble-methods/introduction" class=''></a></li> |
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| <li><a href="/docs/latest//machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li> |
| |
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| <li><a href="/docs/latest//machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li> |
| |
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| <li><a href="/docs/latest//machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li> |
| |
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| <li> |
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| <a href="/docs/latest/machine-learning/recommendation-systems" |
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| class='' |
| >Recommendation Systems</a> |
| |
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| |
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| <li> |
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| <button |
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| <li><a href="/docs/latest//machine-learning/importing-model/introduction" class=''>Introduction</a></li> |
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| <li><a href="/docs/latest//machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li> |
| |
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| <li><a href="/docs/latest//machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li> |
| |
| </nav> |
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| </nav> |
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| <a href="/docs/latest/monitoring-metrics/intro" |
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| >Introduction</a> |
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| <li> |
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| <a href="/docs/latest/monitoring-metrics/cluster-id" |
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| <li><a href="/docs/latest//monitoring-metrics/configuring-metrics" class=''>Configuring Metrics</a></li> |
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| <li><a href="/docs/latest//monitoring-metrics/metrics" class=''>JMX Metrics</a></li> |
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| <li><a href="/docs/latest//security/tde" class=''>Introduction</a></li> |
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| <a href="/docs/latest/thin-clients/cpp-thin-client" |
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| >C++ Thin Client</a> |
| |
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| <li> |
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| <a href="/docs/latest/thin-clients/python-thin-client" |
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| class='' |
| >Python Thin Client</a> |
| |
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| <li> |
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| <a href="/docs/latest/thin-clients/php-thin-client" |
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| >PHP Thin Client</a> |
| |
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| <a href="/docs/latest/thin-clients/nodejs-thin-client" |
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| class='' |
| >Node.js Thin Client</a> |
| |
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| |
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| <li><a href="/docs/latest//binary-client-protocol/binary-client-protocol" class=''>Binary Client Protocol</a></li> |
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| |
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| <li><a href="/docs/latest//binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li> |
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| <li><a href="/docs/latest//binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li> |
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| <li><a href="/docs/latest//binary-client-protocol/cache-configuration" class=''>Cache Configuration</a></li> |
| |
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| <li> |
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| <a href="/docs/latest/SQL/ODBC/odbc-driver" |
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| class='' |
| >ODBC Driver</a> |
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| |
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| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/connection-string-dsn" |
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| class='' |
| >Connection String and DSN</a> |
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| |
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| <li> |
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| <a href="/docs/latest/SQL/ODBC/querying-modifying-data" |
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| class='' |
| >Querying and Modifying Data</a> |
| |
| </li> |
| |
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| <li> |
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| <a href="/docs/latest/SQL/ODBC/specification" |
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| class='' |
| >Specification</a> |
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| </li> |
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| |
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| <li> |
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| <a href="/docs/latest/SQL/ODBC/data-types" |
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| class='' |
| >Data Types</a> |
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| </li> |
| |
| |
| |
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| |
| <li> |
| |
| <a href="/docs/latest/SQL/ODBC/error-codes" |
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| class='' |
| >Error Codes</a> |
| |
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| |
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| <li> |
| |
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| <a href="/docs/latest/restapi" class='' >REST API</a> |
| |
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| <a href="/docs/latest/control-script" class='' >Control Script</a> |
| |
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| <a href="/docs/latest/plugins" class='' >Plugins</a> |
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| |
| <a href="/docs/latest/sqlline" class='' >SQLLine</a> |
| |
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| <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> |
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| <li> |
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| <a href="/docs/latest/ignite-for-spark/overview" |
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| class='' |
| >Overview</a> |
| |
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| |
| <li> |
| |
| <a href="/docs/latest/ignite-for-spark/ignitecontext-and-rdd" |
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| class='' |
| >IgniteContext and IgniteRDD</a> |
| |
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| <article data-swiftype-index='true'> |
| <a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/binary-client-protocol/sql-and-scan-queries.adoc" target="_blank">Edit</a> |
| |
| <h1>SQL and Scan Queries</h1> |
| |
| <div class="sect1"> |
| <h2 id="operation-codes">Operation codes</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Upon a successful handshake with an Ignite server node, a client can start performing various SQL and scan queries by sending a request (see request/response structure below) with a specific operation code:</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 66.6666%;"> |
| <col style="width: 33.3334%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Operation</th> |
| <th class="tableblock halign-left valign-top">OP_CODE</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SQL</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2002</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SQL_CURSOR_GET_PAGE</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2003</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SQL_FIELDS</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2004</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SQL_FIELDS_CURSOR_GET_PAGE</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2005</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SCAN</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2000</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_QUERY_SCAN_CURSOR_GET_PAGE</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">2001</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">OP_RESOURCE_CLOSE</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">0</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="paragraph"> |
| <p>Note that the above mentioned op_codes are part of the request header, as explained <a href="/docs/latest/binary-client-protocol/binary-client-protocol#standard-message-header">here</a>.</p> |
| </div> |
| <div class="admonitionblock note"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Note</div> |
| </td> |
| <td class="content"> |
| <h3 id="customs-methods-used-in-sample-code-snippets-implementation" class="discrete">Customs Methods Used in Sample Code Snippets Implementation</h3> |
| <div class="paragraph"> |
| <p>Some of the code snippets below use <code>readDataObject(…​)</code> introduced in <a href="/docs/latest/binary-client-protocol/binary-client-protocol#data-objects">this section</a> and little-endian versions of methods for reading and writing multiple-byte values that are covered in <a href="/docs/latest/binary-client-protocol/binary-client-protocol#data-objects">this example</a>.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_sql">OP_QUERY_SQL</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Executes an SQL query over data stored in the cluster. The query returns the whole record (key and value).</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cache ID: Java-style hash code of the cache name</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">byte</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Use 0. This field is deprecated and will be removed in the future.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">String</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name of a type or SQL table.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">String</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">SQL query string.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Query argument count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Query argument.</p> |
| <p class="tableblock">Repeat for as many times as the query argument count that is passed in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Distributed joins.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Local query.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Replicated only - Whether query contains only replicated tables or not.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor page size.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Timeout (miliseconds).</p> |
| <p class="tableblock">Timeout value should be non-negative. Zero value disables timeout.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="paragraph"> |
| <p>Response includes the first page of the result.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id. Can be closed with OP_RESOURSE_CLOSE.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Row count for the first page.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Key Data Object + Value Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Records in the form of key-value pairs.</p> |
| <p class="tableblock">Repeat for as many times as the row count obtained in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be fetched with OP_QUERY_SQL_CURSOR_GET_PAGE. |
| When true, query cursor is closed automatically.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">String</span> <span class="n">entityName</span> <span class="o">=</span> <span class="s">"Person"</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">entityNameLength</span> <span class="o">=</span> <span class="n">getStrLen</span><span class="o">(</span><span class="n">entityName</span><span class="o">);</span> <span class="c1">// UTF-8 bytes</span> |
| |
| <span class="nc">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"Select * from Person"</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">sqlLength</span> <span class="o">=</span> <span class="n">getStrLen</span><span class="o">(</span><span class="n">sql</span><span class="o">);</span> |
| |
| <span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">34</span> <span class="o">+</span> <span class="n">entityNameLength</span> <span class="o">+</span> <span class="n">sqlLength</span><span class="o">,</span> <span class="no">OP_QUERY_SQL</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Cache id</span> |
| <span class="nc">String</span> <span class="n">queryCacheName</span> <span class="o">=</span> <span class="s">"personCache"</span><span class="o">;</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="n">queryCacheName</span><span class="o">.</span><span class="na">hashCode</span><span class="o">(),</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Flag = none</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">0</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Query Entity</span> |
| <span class="n">writeString</span><span class="o">(</span><span class="n">entityName</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// SQL query</span> |
| <span class="n">writeString</span><span class="o">(</span><span class="n">sql</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Argument count</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">0</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Joins</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Local query</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Replicated</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// cursor page size</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Timeout</span> |
| <span class="n">writeLongLittleEndian</span><span class="o">(</span><span class="mi">5000</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">long</span> <span class="n">cursorId</span> <span class="o">=</span> <span class="n">readLongLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">rowCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Read entries (as user objects)</span> |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rowCount</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span> |
| <span class="nc">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| <span class="nc">Object</span> <span class="n">val</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"CacheEntry: "</span> <span class="o">+</span> <span class="n">key</span> <span class="o">+</span> <span class="s">", "</span> <span class="o">+</span> <span class="n">val</span><span class="o">);</span> |
| <span class="o">}</span> |
| |
| <span class="kt">boolean</span> <span class="n">moreResults</span> <span class="o">=</span> <span class="n">readBooleanLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_sql_cursor_get_page">OP_QUERY_SQL_CURSOR_GET_PAGE</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Retrieves the next SQL query cursor page by cursor id from OP_QUERY_SQL.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="paragraph"> |
| <p>Response format looks as follows:</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Row count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Key Data Object + Value Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Records in the form of key-value pairs.</p> |
| <p class="tableblock">Repeat for as many times as the row count obtained in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be fetched with OP_QUERY_SQL_CURSOR_GET_PAGE. |
| When true, query cursor is closed automatically.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">8</span><span class="o">,</span> <span class="no">OP_QUERY_SQL_CURSOR_GET_PAGE</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Cursor Id (received from Sql query operation)</span> |
| <span class="n">writeLongLittleEndian</span><span class="o">(</span><span class="n">cursorId</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">rowCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Read entries (as user objects)</span> |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rowCount</span><span class="o">;</span> <span class="n">i</span><span class="o">++){</span> |
| <span class="nc">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| <span class="nc">Object</span> <span class="n">val</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"CacheEntry: "</span> <span class="o">+</span> <span class="n">key</span> <span class="o">+</span> <span class="s">", "</span> <span class="o">+</span> <span class="n">val</span><span class="o">);</span> |
| <span class="o">}</span> |
| |
| <span class="kt">boolean</span> <span class="n">moreResults</span> <span class="o">=</span> <span class="n">readBooleanLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_sql_fields">OP_QUERY_SQL_FIELDS</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Performs SQL fields query.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cache ID: Java-style hash code of the cache name.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">byte</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Use 0. This field is deprecated and will be removed in the future.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">String</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Schema for the query; can be null, in which case default PUBLIC schema will be used.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Query cursor page size.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Max rows.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">String</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">SQL</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Argument count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Query argument.</p> |
| <p class="tableblock">Repeat for as many times as the query argument count that is passed in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">byte</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Statement type.</p> |
| <p class="tableblock">ANY = 0</p> |
| <p class="tableblock">SELECT = 1</p> |
| <p class="tableblock">UPDATE = 2</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Distributed joins</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Local query.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Replicated only - Whether query contains only replicated tables or not.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Enforce join order.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Collocated - Whether your data is co-located or not.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Lazy query execution.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Timeout (milliseconds).</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Include field names.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id. Can be closed with OP_RESOURCE_CLOSE.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Field (column) count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">String (optional)</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Needed only when IncludeFieldNames is true in the request.</p> |
| <p class="tableblock">Column name.</p> |
| <p class="tableblock">Repeat for as many times as the field count that is retrieved in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">First page row count. |
| Data Object Column (field) value. Repeat for as many times as the field count.</p> |
| <p class="tableblock">Repeat for as many times as the row count that is retrieved in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be retrieved with OP_QUERY_SQL_FIELDS_CURSOR_GET_PAGE.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"Select id, salary from Person"</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">sqlLength</span> <span class="o">=</span> <span class="n">sql</span><span class="o">.</span><span class="na">getBytes</span><span class="o">(</span><span class="s">"UTF-8"</span><span class="o">).</span><span class="na">length</span><span class="o">;</span> |
| |
| <span class="nc">String</span> <span class="n">sqlSchema</span> <span class="o">=</span> <span class="s">"PUBLIC"</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">sqlSchemaLength</span> <span class="o">=</span> <span class="n">sqlSchema</span><span class="o">.</span><span class="na">getBytes</span><span class="o">(</span><span class="s">"UTF-8"</span><span class="o">).</span><span class="na">length</span><span class="o">;</span> |
| |
| <span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">43</span> <span class="o">+</span> <span class="n">sqlLength</span> <span class="o">+</span> <span class="n">sqlSchemaLength</span><span class="o">,</span> <span class="no">OP_QUERY_SQL_FIELDS</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Cache id</span> |
| <span class="nc">String</span> <span class="n">queryCacheName</span> <span class="o">=</span> <span class="s">"personCache"</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">cacheId</span> <span class="o">=</span> <span class="n">queryCacheName</span><span class="o">.</span><span class="na">hashCode</span><span class="o">();</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="n">cacheId</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Flag = none</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">0</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Schema</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">9</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="n">sqlSchemaLength</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBytes</span><span class="o">(</span><span class="n">sqlSchema</span><span class="o">);</span> <span class="c1">//sqlSchemaLength</span> |
| |
| <span class="c1">// cursor page size</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Max Rows</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">5</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// SQL query</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">9</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="n">sqlLength</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBytes</span><span class="o">(</span><span class="n">sql</span><span class="o">);</span><span class="c1">//sqlLength</span> |
| |
| <span class="c1">// Argument count</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">0</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Statement type</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Joins</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Local query</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Replicated</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Enforce join order</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// collocated</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Lazy</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span> |
| |
| <span class="c1">// Timeout</span> |
| <span class="n">writeLongLittleEndian</span><span class="o">(</span><span class="mi">5000</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Replicated</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">long</span> <span class="n">cursorId</span> <span class="o">=</span> <span class="n">readLongLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">colCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">rowCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Read entries</span> |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rowCount</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span> |
| <span class="kt">long</span> <span class="n">id</span> <span class="o">=</span> <span class="o">(</span><span class="kt">long</span><span class="o">)</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| <span class="kt">int</span> <span class="n">salary</span> <span class="o">=</span> <span class="o">(</span><span class="kt">int</span><span class="o">)</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"Person id: "</span> <span class="o">+</span> <span class="n">id</span> <span class="o">+</span> <span class="s">"; Person Salary: "</span> <span class="o">+</span> <span class="n">salary</span><span class="o">);</span> |
| <span class="o">}</span> |
| |
| <span class="kt">boolean</span> <span class="n">moreResults</span> <span class="o">=</span> <span class="n">readBooleanLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_sql_fields_cursor_get_page">OP_QUERY_SQL_FIELDS_CURSOR_GET_PAGE</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Retrieves the next query result page by cursor id from OP_QUERY_SQL_FIELDS .</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id received from OP_QUERY_SQL_FIELDS</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Row count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Column (field) value. Repeat for as many times as the field count.</p> |
| <p class="tableblock">Repeat for as many times as the row count that is retrieved in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be retrieved with OP_QUERY_SQL_FIELDS_CURSOR_GET_PAGE</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">8</span><span class="o">,</span> <span class="no">QUERY_SQL_FIELDS_CURSOR_GET_PAGE</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Cursor Id</span> |
| <span class="n">writeLongLittleEndian</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">rowCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Read entries (as user objects)</span> |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rowCount</span><span class="o">;</span> <span class="n">i</span><span class="o">++){</span> |
| <span class="c1">// read data objects * column count.</span> |
| <span class="o">}</span> |
| |
| <span class="kt">boolean</span> <span class="n">moreResults</span> <span class="o">=</span> <span class="n">readBooleanLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_scan">OP_QUERY_SCAN</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Performs scan query.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cache ID: Java-style hash code of the cache name.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">byte</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Flag. Pass 0 for default, or 1 to keep the value in binary form.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Filter object. Can be null if you are not going to filter data on the cluster. The filter class has to be added to the classpath of the server nodes.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">byte</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Filter platform:</p> |
| <p class="tableblock">JAVA = 1</p> |
| <p class="tableblock">DOTNET = 2</p> |
| <p class="tableblock">CPP = 3</p> |
| <p class="tableblock">Pass this parameter only if filter object is not null.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor page size.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Number of partitions to query (negative to query entire cache).</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Local flag - whether this query should be executed on local node only.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">int</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Row count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Key Data Object + Value Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Records in the form of key-value pairs.</p> |
| <p class="tableblock">Repeat for as many times as the row count obtained in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be fetched with OP_QUERY_SCAN_CURSOR_GET_PAGE. |
| When true, query cursor is closed automatically.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">15</span><span class="o">,</span> <span class="no">OP_QUERY_SCAN</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Cache id</span> |
| <span class="nc">String</span> <span class="n">queryCacheName</span> <span class="o">=</span> <span class="s">"personCache"</span><span class="o">;</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="n">queryCacheName</span><span class="o">.</span><span class="na">hashCode</span><span class="o">(),</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// flags</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">0</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Filter Object</span> |
| <span class="n">writeByteLittleEndian</span><span class="o">(</span><span class="mi">101</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> <span class="c1">// null</span> |
| |
| <span class="c1">// Cursor page size</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Partition to query</span> |
| <span class="n">writeIntLittleEndian</span><span class="o">(-</span><span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// local flag</span> |
| <span class="n">out</span><span class="o">.</span><span class="na">writeBoolean</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">//Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Cursor id</span> |
| <span class="kt">long</span> <span class="n">cursorId</span> <span class="o">=</span> <span class="n">readLongLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="kt">int</span> <span class="n">rowCount</span> <span class="o">=</span> <span class="n">readIntLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="c1">// Read entries (as user objects)</span> |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rowCount</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span> |
| <span class="nc">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| <span class="nc">Object</span> <span class="n">val</span> <span class="o">=</span> <span class="n">readDataObject</span><span class="o">(</span><span class="n">in</span><span class="o">);</span> |
| |
| <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"CacheEntry: "</span> <span class="o">+</span> <span class="n">key</span> <span class="o">+</span> <span class="s">", "</span> <span class="o">+</span> <span class="n">val</span><span class="o">);</span> |
| <span class="o">}</span> |
| |
| <span class="kt">boolean</span> <span class="n">moreResults</span> <span class="o">=</span> <span class="n">readBooleanLittleEndian</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_query_scan_cursor_get_page">OP_QUERY_SCAN_CURSOR_GET_PAGE</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Fetches the next SQL query cursor page by cursor id that is obtained from OP_QUERY_SCAN.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Cursor id.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Row count.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Key Data Object + Value Data Object</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Records in the form of key-value pairs.</p> |
| <p class="tableblock">Repeat for as many times as the row count obtained in the previous parameter.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">bool</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Indicates whether more results are available to be fetched with OP_QUERY_SCAN_CURSOR_GET_PAGE. |
| When true, query cursor is closed automatically.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="op_resource_close">OP_RESOURCE_CLOSE</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Closes a resource, such as query cursor.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Request Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Request header.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">long</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Resource id.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 33.3333%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Response Type</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Header</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Response header</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <code-tabs><code-tab data-tab='Request'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">DataOutputStream</span> <span class="n">out</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataOutputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getOutputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Request header</span> |
| <span class="n">writeRequestHeader</span><span class="o">(</span><span class="mi">8</span><span class="o">,</span> <span class="no">OP_RESOURCE_CLOSE</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span> |
| |
| <span class="c1">// Resource id</span> |
| <span class="kt">long</span> <span class="n">cursorId</span> <span class="o">=</span> <span class="mi">1</span><span class="o">;</span> |
| <span class="n">writeLongLittleEndian</span><span class="o">(</span><span class="n">cursorId</span><span class="o">,</span> <span class="n">out</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab><code-tab data-tab='Response'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Read result</span> |
| <span class="nc">DataInputStream</span> <span class="n">in</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">DataInputStream</span><span class="o">(</span><span class="n">socket</span><span class="o">.</span><span class="na">getInputStream</span><span class="o">());</span> |
| |
| <span class="c1">// Response header</span> |
| <span class="n">readResponseHeader</span><span class="o">(</span><span class="n">in</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </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="#operation-codes">Operation codes</a></li> |
| <li><a href="#op_query_sql">OP_QUERY_SQL</a></li> |
| <li><a href="#op_query_sql_cursor_get_page">OP_QUERY_SQL_CURSOR_GET_PAGE</a></li> |
| <li><a href="#op_query_sql_fields">OP_QUERY_SQL_FIELDS</a></li> |
| <li><a href="#op_query_sql_fields_cursor_get_page">OP_QUERY_SQL_FIELDS_CURSOR_GET_PAGE</a></li> |
| <li><a href="#op_query_scan">OP_QUERY_SCAN</a></li> |
| <li><a href="#op_query_scan_cursor_get_page">OP_QUERY_SCAN_CURSOR_GET_PAGE</a></li> |
| <li><a href="#op_resource_close">OP_RESOURCE_CLOSE</a></li> |
| </ul> |
| |
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