Apache Calcite Architecture and Benefits Overview

What is Apache Calcite?

Apache Calcite is an open source dynamic data management framework which is licensed by Apache software foundation and is written in Java programming language. Apache Calcite consists of many things that comprises a general database management system, but does not have the key features of it like storing the data and processing of that data, which is done by some specialized engines.

As Apache Calcite Architecture does not support storing and processing of the data, so this feature of Apache Calcite helps in mediating between the applications which are having more than one data storage locations and also using multiple data processing engines. Some of the processing engines which adopts Calcite are Apache Hive, Drill, Storm and Flink.

There are several Apache projects which uses Apache Calcite and those are –

Apache Calcite includes many components like Sql parser, Query optimizer, Sql generator, Sql validator and an API for building expressions in relational algebra.


Apache Calcite Benefits

Though Apache Calcite Architecture does not support storing and the processing of data, but it have sevaral features which maks it beneficial to use, and that are as follows –

Open Source Friendliness – Apache Calcite is an open source framework maintained by Apache Software Foundation. As it is written in Java which makes it easier to operate with many data processing engines that are also written in java or runs on JVM based environment, especially when talking about the Hadoop ecosystem.

Multiple Data Models – As Calcite supports query optimization and query execution but does not supports storing and processing of data, which makes it good for mediating between the applications having more than one data storage locations and also using multiple data processing engines.

Cross System Support – Here, cross system support means that Apache Calcite framework is able to run and optimize queries across several query processing systems or engines and database backends like Apache Spark, Hive, Flink, Drill and many others.

Support for SQL and its Extensions – As many systems does not provide their own query language and prefers the existing one like SQL. So, for those systems, Calcite provides supports for SQL dialects and extensions.

Reliability – Calcite is much reliable as it contains an extensive test suite which validates all the components of the system and also includes the query optimizer rules and the integration with the backend data sources.


How Apache Calcite Works?

In this before passing any querry, we have to tell the query planner that what schema and tables are currently available. So , the first step is to parse the model and should generate a schema object, and for this purpose a Calcite’s ModelHandler is used and for writing a model handler we have to write a dummy implementation of Calcite connection interface and use it to pass state to ModelHandler. After invoking the ModelHandler, from that dummy connection object we will get the schemaobject and use it with the query planner.


Apache Calcite Architecture

There are various components which comprises in Apache Calcite Architecture –

SQL query Parser and Validator – It translates the sql query to a tree of relational operators. As, it does not supports storing of data, so it provides a method to define a table schema and view external storage engines with the help of adapters.

  • Simple Planning Queries
  • Optimized Query

Although Calcite provides optimized SQL support to the systems which needs it, it also gives optimization support to the systems that already have their own language parsing and interpretation.


Challanges Faced by Query Optimizer

Some of the challenges facing in query optimization and making an efficient query are join optimization and the table size when using tables.As a join combines rows from two tables with the help of the values of the fields which are common in both. So, the order which is used to join the tables will impact on the data set size and will impact on the prerformance. So, one of the main advantage of query optimizer is the ability to find the best join order. The join order is not defined in the execution plan of the query.

The query optimizer considers two different type of trees and those are –

Left Deep Nodes

All the internal nodes of the left deep tree have atleast one leaf node as a child node.Althogh it is simple to implement but this technique does not gives an efficient results.In this technique we firstly joins the two tables and after that the resultant table is joined with the third table, and the resultant of that table gets joined with theanother one and so on untill the join operation gets performed.

Bushy Trees Nodes

In this a join operates on the result of two join. These trees also contains subtrees and their joins with other subtrees are more efficient than that of left deep. In this technique, if there exists four tables to be join, then we first apply join operation on the two tables, after that join is performed on another two tables are join and after getting the resultant table of both the join operations, the final join operation is performed in order to perform joi non all the tables.


Learn More About Database Management System

If you are looking for more information regarding databases, we recommend you to give a read to Cloud Native Databases Insight and Test and Behavior Driven Development with MySQL,MariaDB Database Blog


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Data warehouse"></span><input type="radio" id="wpforms-8104-field_21_4" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Cloud Data warehouse" tabindex="-1" required ><span class="wpforms-image-choices-label">Cloud Data warehouse</span></label></li><li class="choice-5 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8104-field_21_5" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/enterprise-data-strategy.png" alt="Enterprise Data Strategy" title="Enterprise Data Strategy"></span><input type="radio" id="wpforms-8104-field_21_5" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Enterprise Data Strategy" tabindex="-1" required ><span class="wpforms-image-choices-label">Enterprise Data Strategy</span></label></li></ul></div><div id="wpforms-8104-field_23-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="23"><div class="wpforms-clear wpforms-pagebreak-left"><button class="wpforms-page-button wpforms-page-next" data-action="next" data-page="1" data-formid="8104">Next</button></div></div></div><div class="wpforms-page wpforms-page-2 last " style="display:none;"><div id="wpforms-8104-field_25-container" class="wpforms-field wpforms-field-html form-popup-header-wrapper" data-field-id="25"><div id="wpforms-8104-field_25"><div class="form-popup-header"> <h2>Lets Discuss and Understand the Requirements</h2> </div></div></div><div id="wpforms-8104-field_20-container" class="wpforms-field wpforms-field-name col-12 col-sm-12 col-md-12 form-group" data-field-id="20"><label class="wpforms-field-label" for="wpforms-8104-field_20">Name <span class="wpforms-required-label">*</span></label><input type="text" id="wpforms-8104-field_20" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][20]" placeholder="Name" required></div><div id="wpforms-8104-field_2-container" class="wpforms-field wpforms-field-email col-12 col-sm-12 col-md-12 form-group" data-field-id="2"><label class="wpforms-field-label" for="wpforms-8104-field_2">Email <span class="wpforms-required-label">*</span></label><input type="email" id="wpforms-8104-field_2" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][2]" placeholder="Email" required></div><div id="wpforms-8104-field_3-container" class="wpforms-field wpforms-field-text col-12 col-sm-12 col-md-12 form-group" data-field-id="3"><label class="wpforms-field-label" for="wpforms-8104-field_3">Organization <span class="wpforms-required-label">*</span></label><input type="text" id="wpforms-8104-field_3" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][3]" placeholder="Organization" required></div><div id="wpforms-8104-field_11-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="11"><div class="wpforms-clear wpforms-pagebreak-left"></div></div></div></div><div class="wpforms-field wpforms-field-hp"><label for="wpforms-8104-field-hp" class="wpforms-field-label">Website</label><input type="text" name="wpforms[hp]" id="wpforms-8104-field-hp" class="wpforms-field-medium"></div><input type="hidden" name="wpforms[recaptcha]" value=""><div class="wpforms-submit-container" style="display:none;"><input type="hidden" name="wpforms[id]" value="8104"><input type="hidden" name="wpforms[author]" value="1"><input type="hidden" name="wpforms[post_id]" value="2524"><button type="submit" name="wpforms[submit]" class="wpforms-submit om-trigger-conversion mon-btn" id="wpforms-submit-8104" value="wpforms-submit" aria-live="assertive" data-alt-text="Submitting..." data-submit-text="Submit">Submit</button></div></form></div> <!-- .wpforms-container -->
[wpforms id="8095"]
<div class="wpforms-container wpforms-container-full optin-monster-forms" id="wpforms-8095"><form id="wpforms-form-8095" class="wpforms-validate wpforms-form" data-formid="8095" method="post" enctype="multipart/form-data" action="/insights/apache-calcite/"><noscript class="wpforms-error-noscript">Please enable JavaScript in your browser to complete this form.</noscript><div class="wpforms-page-indicator progress" data-indicator="progress" data-indicator-color="#72b239" data-scroll="1"><span class="wpforms-page-indicator-page-title" ></span><span class="wpforms-page-indicator-page-title-sep" style="display:none;"> - </span><span class="wpforms-page-indicator-steps">Step <span class="wpforms-page-indicator-steps-current">1</span> of 2</span><div class="wpforms-page-indicator-page-progress-wrap"><div class="wpforms-page-indicator-page-progress" style="width:50%;background-color:#72b239;"></div></div></div><div class="wpforms-field-container"><div class="wpforms-page wpforms-page-1 "><div id="wpforms-8095-field_10-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="10"></div><div id="wpforms-8095-field_24-container" class="wpforms-field wpforms-field-html form-popup-header-wrapper" data-field-id="24"><div id="wpforms-8095-field_24"><div class="form-popup-header"> <h2>RPA and Cognitive Automation</h2> <p>Making business processes smarter and more efficient</p> </div></div></div><div id="wpforms-8095-field_21-container" class="wpforms-field wpforms-field-radio custom-radio-btn-wrapper wpforms-list-3-columns" data-field-id="21"><label class="wpforms-field-label wpforms-label-hide" for="wpforms-8095-field_21">Sevices <span class="wpforms-required-label">*</span></label><ul id="wpforms-8095-field_21" class="wpforms-field-required wpforms-image-choices wpforms-image-choices-modern"><li class="choice-1 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8095-field_21_1" tabindex="0"><span 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class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/blueprism.png" alt=""></span><input type="radio" id="wpforms-8095-field_21_3" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Choice 3" tabindex="-1" required ><span class="wpforms-image-choices-label"></span></label></li><li class="choice-4 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8095-field_21_4" tabindex="0"><input type="radio" id="wpforms-8095-field_21_4" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Intelligent Automation" tabindex="-1" required ><span class="wpforms-image-choices-label">Intelligent Automation</span></label></li><li class="choice-5 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8095-field_21_5" tabindex="0"><input type="radio" id="wpforms-8095-field_21_5" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="RPA with AI" tabindex="-1" required ><span class="wpforms-image-choices-label">RPA with AI</span></label></li><li class="choice-6 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8095-field_21_6" tabindex="0"><input type="radio" id="wpforms-8095-field_21_6" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Open Source RPA Implementation" tabindex="-1" required ><span class="wpforms-image-choices-label">Open Source RPA Implementation</span></label></li></ul></div><div id="wpforms-8095-field_23-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="23"><div class="wpforms-clear wpforms-pagebreak-left"><button class="wpforms-page-button wpforms-page-next" data-action="next" data-page="1" data-formid="8095">Next</button></div></div></div><div class="wpforms-page wpforms-page-2 last " style="display:none;"><div id="wpforms-8095-field_25-container" class="wpforms-field wpforms-field-html form-popup-header-wrapper" data-field-id="25"><div id="wpforms-8095-field_25"><div class="form-popup-header"> <h2>Let Us Discuss and Understand the Requirement</h2> </div></div></div><div id="wpforms-8095-field_20-container" class="wpforms-field wpforms-field-name col-12 col-sm-12 col-md-12 form-group" data-field-id="20"><label class="wpforms-field-label" for="wpforms-8095-field_20">Name <span class="wpforms-required-label">*</span></label><input type="text" id="wpforms-8095-field_20" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][20]" placeholder="Name" required></div><div id="wpforms-8095-field_2-container" class="wpforms-field wpforms-field-email col-12 col-sm-12 col-md-12 form-group" data-field-id="2"><label class="wpforms-field-label" for="wpforms-8095-field_2">Email <span class="wpforms-required-label">*</span></label><input type="email" id="wpforms-8095-field_2" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][2]" placeholder="Email" required></div><div id="wpforms-8095-field_3-container" class="wpforms-field wpforms-field-text col-12 col-sm-12 col-md-12 form-group" data-field-id="3"><label class="wpforms-field-label" for="wpforms-8095-field_3">Organization <span class="wpforms-required-label">*</span></label><input type="text" id="wpforms-8095-field_3" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][3]" placeholder="Organization" required></div><div id="wpforms-8095-field_11-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="11"><div class="wpforms-clear wpforms-pagebreak-left"></div></div></div></div><div class="wpforms-field wpforms-field-hp"><label for="wpforms-8095-field-hp" class="wpforms-field-label">Comment</label><input type="text" name="wpforms[hp]" id="wpforms-8095-field-hp" class="wpforms-field-medium"></div><input type="hidden" name="wpforms[recaptcha]" value=""><div class="wpforms-submit-container" style="display:none;"><input type="hidden" name="wpforms[id]" value="8095"><input type="hidden" name="wpforms[author]" value="1"><input type="hidden" name="wpforms[post_id]" value="2524"><button type="submit" name="wpforms[submit]" class="wpforms-submit om-trigger-conversion mon-btn" id="wpforms-submit-8095" value="wpforms-submit" aria-live="assertive" data-alt-text="Submitting..." data-submit-text="Submit">Submit</button></div></form></div> <!-- .wpforms-container -->
[wpforms id="8085"]
<div class="wpforms-container wpforms-container-full optin-monster-forms" id="wpforms-8085"><form id="wpforms-form-8085" class="wpforms-validate wpforms-form" data-formid="8085" method="post" enctype="multipart/form-data" action="/insights/apache-calcite/"><noscript class="wpforms-error-noscript">Please enable JavaScript in your browser to complete this form.</noscript><div class="wpforms-page-indicator progress" data-indicator="progress" data-indicator-color="#72b239" data-scroll="1"><span class="wpforms-page-indicator-page-title" ></span><span class="wpforms-page-indicator-page-title-sep" style="display:none;"> - </span><span class="wpforms-page-indicator-steps">Step <span class="wpforms-page-indicator-steps-current">1</span> of 2</span><div class="wpforms-page-indicator-page-progress-wrap"><div class="wpforms-page-indicator-page-progress" style="width:50%;background-color:#72b239;"></div></div></div><div class="wpforms-field-container"><div class="wpforms-page wpforms-page-1 "><div id="wpforms-8085-field_10-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="10"></div><div id="wpforms-8085-field_24-container" class="wpforms-field wpforms-field-html form-popup-header-wrapper" data-field-id="24"><div id="wpforms-8085-field_24"><div class="form-popup-header"> <img src="https://www.xenonstack.com/images/wednesday-digitally-transform-popup-img.png" /> <h2>Digitally Transform <span>your Organization </span></h2> </div></div></div><div id="wpforms-8085-field_21-container" class="wpforms-field wpforms-field-radio custom-radio-btn-wrapper wpforms-list-2-columns" data-field-id="21"><label class="wpforms-field-label wpforms-label-hide" for="wpforms-8085-field_21">Sevices <span class="wpforms-required-label">*</span></label><ul id="wpforms-8085-field_21" class="wpforms-field-required wpforms-image-choices wpforms-image-choices-modern"><li class="choice-1 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_1" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/continous-delivery-e1594278564177.png" alt="Continous Delivery and DevSecOps" title="Continous Delivery and DevSecOps"></span><input type="radio" id="wpforms-8085-field_21_1" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Continous Delivery and DevSecOps" tabindex="-1" required ><span class="wpforms-image-choices-label">Continous Delivery and DevSecOps</span></label></li><li class="choice-2 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_2" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/robotic-process.png" alt="Robotic Process Automation" title="Robotic Process Automation"></span><input type="radio" id="wpforms-8085-field_21_2" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Robotic Process Automation" tabindex="-1" required ><span class="wpforms-image-choices-label">Robotic Process Automation</span></label></li><li class="choice-3 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_3" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/big-data-analytics.png" alt="Big Data Analytics" title="Big Data Analytics"></span><input type="radio" id="wpforms-8085-field_21_3" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Big Data Analytics" tabindex="-1" required ><span class="wpforms-image-choices-label">Big Data Analytics</span></label></li><li class="choice-4 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_4" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/cloud-security.png" alt="Cloud Security" title="Cloud Security"></span><input type="radio" id="wpforms-8085-field_21_4" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Cloud Security" tabindex="-1" required ><span class="wpforms-image-choices-label">Cloud Security</span></label></li><li class="choice-5 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_5" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/data-science-ai-e1594278553510.png" alt="Data Science and AI" title="Data Science and AI"></span><input type="radio" id="wpforms-8085-field_21_5" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Data Science and AI" tabindex="-1" required ><span class="wpforms-image-choices-label">Data Science and AI</span></label></li><li class="choice-6 depth-1 wpforms-image-choices-item"><label class="wpforms-field-label-inline" for="wpforms-8085-field_21_6" tabindex="0"><span class="wpforms-image-choices-image"><img src="https://www.xenonstack.com/wp-content/uploads/2020/07/cloud-migration-e1594278582638.png" alt="Cloud Migration" title="Cloud Migration"></span><input type="radio" id="wpforms-8085-field_21_6" class="wpforms-screen-reader-element" name="wpforms[fields][21]" value="Cloud Migration" tabindex="-1" required ><span class="wpforms-image-choices-label">Cloud Migration</span></label></li></ul></div><div id="wpforms-8085-field_23-container" class="wpforms-field wpforms-field-pagebreak" data-field-id="23"><div class="wpforms-clear wpforms-pagebreak-left"><button class="wpforms-page-button wpforms-page-next" data-action="next" data-page="1" data-formid="8085">Next</button></div></div></div><div class="wpforms-page wpforms-page-2 last " style="display:none;"><div id="wpforms-8085-field_25-container" class="wpforms-field wpforms-field-html form-popup-header-wrapper" data-field-id="25"><div id="wpforms-8085-field_25"><div class="form-popup-header"> <img src="https://www.xenonstack.com/images/wednesday-digitally-transform-popup-img.png" /> <div> <h2>How can we get in Touch</h2> <p>Fill the form and we will revert back to you soon.<p></div> </div></div></div><div id="wpforms-8085-field_20-container" class="wpforms-field wpforms-field-name col-12 col-sm-12 col-md-12 form-group" data-field-id="20"><label class="wpforms-field-label" for="wpforms-8085-field_20">Name <span class="wpforms-required-label">*</span></label><input type="text" id="wpforms-8085-field_20" class="wpforms-field-large wpforms-field-required" name="wpforms[fields][20]" placeholder="Name" required></div><div id="wpforms-8085-field_2-container" class="wpforms-field wpforms-field-email col-12 col-sm-12 col-md-12 form-group" data-field-id="2"><label class="wpforms-field-label" for="wpforms-8085-field_2">Email <span 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id="wpforms-8085-field-hp" class="wpforms-field-medium"></div><input type="hidden" name="wpforms[recaptcha]" value=""><div class="wpforms-submit-container" style="display:none;"><input type="hidden" name="wpforms[id]" value="8085"><input type="hidden" name="wpforms[author]" value="1"><input type="hidden" name="wpforms[post_id]" value="2524"><button type="submit" name="wpforms[submit]" class="wpforms-submit om-trigger-conversion mon-btn" id="wpforms-submit-8085" value="wpforms-submit" aria-live="assertive" data-alt-text="Submitting..." data-submit-text="Submit">Submit</button></div></form></div> <!-- .wpforms-container -->
[wpforms id="8051"]
<div class="wpforms-container wpforms-container-full optin-monster-forms" id="wpforms-8051"><form id="wpforms-form-8051" class="wpforms-validate wpforms-form" data-formid="8051" method="post" enctype="multipart/form-data" action="/insights/apache-calcite/"><noscript class="wpforms-error-noscript">Please enable JavaScript in your browser to complete this form.</noscript><div class="wpforms-page-indicator progress" data-indicator="progress" data-indicator-color="#72b239" data-scroll="1"><span class="wpforms-page-indicator-page-title" ></span><span class="wpforms-page-indicator-page-title-sep" style="display:none;"> - </span><span class="wpforms-page-indicator-steps">Step <span class="wpforms-page-indicator-steps-current">1</span> of 2</span><div class="wpforms-page-indicator-page-progress-wrap"><div class="wpforms-page-indicator-page-progress" style="width:50%;background-color:#72b239;"></div></div></div><div class="wpforms-field-container"><div class="wpforms-page wpforms-page-1 "><div 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