Apache calcite use cases

Apache calcite use cases. build (); In this case, we create an EnumerableSort on top of the input RelNode Moreover, to assess the performance of Calcite-based systems, we need to consider two distinct use cases. runtime. In Calcite SQL, you can quote identifiers (table names and column names). Spatial query on vanilla databases. This is a step-by-step tutorial that shows how to build and connect to Calcite. In general, the slight overhead of translating SQL on the Broker is the only minor performance penalty to using Druid SQL compared to native queries. Was expecting one of: "ABS" Aug 2, 2016 · Three use cases will be presented as lightning talks by individuals from 1) Sony about its social media NewsSuite app, 2) eHarmony on its matching service, and 3) Salesforce. fennel. public final class LogicalJoin extends Join. RelTraitSet, org. Lex. Apache Calcite is an open source framework for building databases and data management systems. Creates a ConstantExpression that has the Value property set to the specified value. COALESCE expression. In Calcite, matching identifiers to the name of the referenced object is case-sensitive. For example, if input rows have schema (INT f_int, VARCHAR f_string) and dates are in 'YYYYMMDD' (e. Details. Apache Calcite: One planner fits all. Interpreter. 0 and 1. Every row expression ( rex) in a SQL query is defined as a ‘RexNode’ internally which can be an identifier,a literal or Starting the 2. Currently used H2 based query execution engine has a number of critical limitations Which do not allow to execute an arbitrary query. This topic includes best practices and tools to help you Functionality and Features. Returns null if and only if literal is null. Type: Bug QueryRecord. of(RuleSet) and Planner. class) to convert the list of an enumerable that can be queried using the standard query operators. IntelliJ’s Gradle project importer should handle the rest. MongoDB. With a larger adoption comes a higher demand for SQL support that is comparable to RDBMS. You switched accounts on another tab or window. If SqlWriter. AutoCloseable. getString (), and restores the string into an equivalent RexLiteral. Linq4j. In particular it holds working state while the data flow graph is being assembled. Apache Calcite is a foundational software framework that provides query processing, optimization, and query language support to many popular open-source data processing systems such as Apache Hive, Apache Storm, Apache Flink, Druid, and MapD. One SQL to Rule Them All - an Efficient and Syntactically Idiomatic Approach to Management of Streams and Tables. Calcite’s ar-chitecture consists of a modular and extensible query optimizer convert. impl. SqlCaseOperator. 1) We want all GREEN nodes to be preceded by some node. Issues. public static final CalciteConnectionProperty SPARK. The ticket aims to show potential of a new, Calcite based, execution engine which may act not worse than current one on co-located queries, provide a boost for queries, using distributed joins, and A façade that covers Calcite's query planning process: parse SQL, validate the parse tree, convert the parse tree to a relational expression, and optimize the relational expression. 32. I am using SqlDDLParserImpl provided by Calcite Server for my use case. push (input). Also note that when if identifiers are quoted, Calcite retains their case (it does not convert to upper or lower case) and uses case-sensitive matching. The default log file location is a subdirectory under the result getTestlogRoot(), where the subdirectory name is based on the unqualified name of the test class. While debugging the application I can see that the ScalarFunctionImpl. Indeed, Calcite can be used either as part of a single system---as a tool to accelerate the construction of such a system---or for the more difficult task of combining several distinct systems---as a common layer. Relational (CockroachDB, TiDB, YugaByte) BigData/Analytics (Hive, Snowflake, Dremio, Clickhouse, Presto) NoSQL (DataStax*, Couchbase*) Start with building Calcite from the command line. , hold always true, every conjunction > x_i should imply atleast one of the conjunction y_j. Flink’s SQL support is based on Apache Calcite which implements the SQL standard. It Visitor that tells whether a node matching a particular description exists in a tree. > > We have checked in code for this in our fork of Apache Calcite provides a set of components to build query optimizers. public static Casing [] values() Returns an array containing the constants of this enum type, in the order they are declared. farrago. . sort (toCollation). ) calls in test cases. This is a somewhat "fat" interface which unions the attributes of many different type classes into one. First, it can add testXxx() methods, to test more functionality. Streaming SQL. However, it can be reused for different queries. (1, '2018') , then this works: Aug 23, 2015 · For X=>Y to be a tautology i. public class SqlCaseOperator extends SqlOperator. INSTANCE). See full list on calcite. implements java. At some point there will be similar config classes for system and statement properties. Contains the context for interpreting relational expressions. While developing this feature, we made extensive use of the PostGIS documentation and tests, and the H2GIS documentation, and consulted both as reference implementations when SqlWriter (Apache Calcite API) Package org. This method may be used to iterate over the constants as follows: for (Casing c : Casing. Thanks for the help we received from their community. Tutorial. “Old-school” databases (MySQL, Postgres, SQL Server, Oracle) “New” products. Release notes for all published versions are available on the history page. Redis. out. Make it easier to pass query plans over FFI boundaries, such as from Python to Rust Allow Apache Calcite query plans to be executed in DataFusion DataFusion-BigTable This crate implements Bigtable as a data source and physical executor for DataFusion queries. parser. Also, say yes when it asks if you want a new window. Presto, the cost is a vector of estimated CPU, memory, and network usage. These include: Standard SQL support: It provides a universal SQL interface, which supports both relational and non-relational databases. FROM "a table with spaces in the name". ParseException: Encountered """ at line 1, column 26. g. The intention is that tableRel is cheaper to evaluate and therefore if the query being optimized uses (or can be rewritten to use) queryRel as a sub-expression then it can be optimized by using tableRel instead. Mar 27, 2019 · In Calcite, matching identifiers to the name of the referenced object is case-sensitive. Returns a new relational expression with the specified hints hintList . Apache Calcite is a dynamic data management framework. Nov 29, 2023 · I tried calcite SQL parser on version 1. RelNode) will only be called once. rel: Sort($1 DESC) Project(name, empno) TableScan(EMP) fields: [0] collation: [1 DESC] } Jun 4, 2020 · Ignite SQL engine is used across hundreds of deployments who are accelerating relational databases or use Ignite as a system of records. Just want to check if the Apache Calcite can be used for the use case "Data Federation" (query with multiple databases). 31. Casting the strings to dates works as expected in general. ) See the ‘calcite’ branch What’s New? Exciting new or upcoming features for OLTP use cases Dec 4, 2023 · Then simply use the database connection to query some data, for example: rows := db. Coming 1 month after 1. All of these forms are normalized at parse time to a to a simple CASE statement like this: CASE. The semantics are clear, because we aim to produce the same results on a stream as if the same data were in a table. Use Cases # Apache Flink is an excellent choice to develop and run many different types of applications due to its extensive feature set. Apache Calcite, the cost is modelled as a scalar representing the number of rows being processed. All Known Implementing Classes: SqlPrettyWriter. The idea is I have a master query (5 tables) that has tables from one database (say Hive) and 3 tables from another database (say MySQL). We now discuss where the "composability" comes from. This release comes about two months after 1. create call returns a valid ScalarFunctionImpl object which is successfully added to the schema. A Polystore concept, either in its orthodox form, or in a more general interpretation is . transform(int, org. You'll want to start by creating an instance of SqlParser and parsing the query: SqlParser parser = SqlParser. org Apache Calcite. It contains many of the pieces that comprise a typical database management system, but omits some key functions: storage of data, algorithms to process data, and a repository for storing metadata. Calcite; CALCITE-1752; Use URLDecoder#decode to handle URLs acquired from getResource(. apache. In this tutorial, we demonstrate the main components of Calcite and how they interact with each other. Oct 25, 2019 · The hard part is, to modify a SQL, we may need to modify the optimized (final) RelNode, since before the stage the filters, sort, and so on may still not be pushed down. Log In. We would like to show you a description here but the site won’t allow us. Then, I came across Apache Arrow DataFusion, which seems like an evolution over Calcite. This method should be overridden by every logical node that supports hint. It allows one to use Jdbc strings as a common format for data. It provides a SQL parser, validator and optimizer. Uses SQL-like languages or builds SQL engine right now. If you have the chance to attend a meetup , or meet members of the community at a conference, that’s also great. MYSQL public static final Lex MYSQL Druid uses Apache Calcite to parse and plan SQL queries. Catalyst, the Apache Spark optimizer, the cost is a vector of the number of rows and the number of bytes. 36. int 12, short 12, double 3. Fast federated SQL with Apache Calcite. 3) We want to replace all GREEN nodes. This method accepts a string, as returned by the Jdbc method ResultSet. com on its time-series metrics engine. Using the sub-project Avatica we also have the ability to execute our optimized queries against external databases. Flink’s features include support for stream and batch processing, sophisticated state management, event-time processing semantics, and exactly-once consistency guarantees for state. EMPTY, DefaultConfigBuilder 3) Use composition for custom configurations, in other words, let custom rules have their own attributes, and one of the attributes could be default config. JavaCC parser generator and Freemaker template engine are used under the hood. In this talk, I will present query optimization capabilities of Apache Calcite, including cost-based and heuristic optimization drivers and an extensive library of optimization rules Feb 21, 2022 · You signed in with another tab or window. create(query) SqlNode parsed = parser. Reload to refresh your session. 21. If an element cannot be cast to type <TResult>, this method will throw a ClassCastException. For example, SELECT "a column". Join the developers list and send an email. When a query string is submitted, Apache Calcite parses it into an abstract syntax tree (AST). A SqlWriter is the target to construct a SQL statement from a parse tree. CalciteCatalogReader. config. "org. It deals with dialect differences; for example, Oracle quotes identifiers as "scott", while SQL Server quotes Dec 12, 2019 · SQL, short for Structured Query Language, is a de-facto standard language for querying relational (and many non-relational) database management systems (DBMS). Planner is NOT thread safe. public interface SqlWriter. A derived class can refine this test in two ways. For more information on Apache Calcite, please see the product Returns a list of one or more programs used during the course of query evaluation. values()) System. The common use case is when there is a single program created using Programs. sf. WHEN <when expression_0> THEN <then expression_0>. Apache Calcite boasts a robust set of features geared towards facilitating efficient data processing. RelRoot: {. 23. Description copied from class: SqlDialect. WHEN <when expression_1> THEN <then The default RelBuilder creates logical RelNode without coventions. This interface is an example of the abstract factory pattern . version : org. In the default dialect, you use double quotes. 24. Name of the schema that will become the default schema for connections to Calcite that use this model. It is not exactly a programming language, or at least not an ordinary one. Interface SqlWriter. RelDataType represents the type of a scalar expression or entire row returned from a relational expression. Start with building Calcite from the command line. Let us start by defining those nodes and their color. plan. You can write queries that combine streams and tables (or the history of a stream, which is basically an in-memory table). Any data, anywhere. Description copied from interface: Hintable. Parameters: castRowType - row type after cast. QueryRecord provides users a tremendous amount of power by leveraging an extremely well-known syntax (SQL) to route, filter, transform, and query data as it traverses the system. Visitor that throws Util. dif files corresponding to this test case are deleted, and a new, empty . Any existing . private Connection setup() throws SQLException { // Create a jdbc database & table final String db = TempDb. But you can parse the query, modify the optimized RelNode tree, and then unparse back to SQL. You'll want to first find a SqlSelect instance and Navigate the docs…. The consumer of this interface is responsible for calling reset () after each use of CalciteConnectionConfigImpl. Calcite does the rest, and provides a full SQL interface. unparse(org. Instead we represent this as. May 6, 2024 · The Apache Calcite PMC is pleased to announce Apache Calcite release 1. public RelBuilder convert( RelDataType castRowType, boolean rename) Creates a projection that converts the current relational expression's output to a desired row type. Apache Calcite: A Foundational Framework for Optimized Query Processing Over Heterogeneous Data Sources. Calcite intentionally stays out of the business of storing and processing data. > We wrote some set of simple heuristics to check if a conjunction of > atomic predicates implies another. The case of identifiers enclosed in double-quotes is preserved; unquoted identifiers are converted to upper-case; after which, identifiers are matched case-sensitively. Streaming SQL is easy to learn for anyone who knows regular SQL. But remember that unquoted identifiers are implicitly converted to upper case before matching, and if the object it refers to was created using an unquoted identifier for its name, then its name will have been converted to upper case also. Does the right thing for null, String, primitive values (e. validate. Named, built-in lexical policy. gradle. lang. Apache Phoenix; Apache Samza; Apache Storm; Apache Wayang; AthenaX; Cascading; Dremio; HerdDB; OmniSci; Qubole Quark; SQL-Gremlin; TBDS; Is your company or project powered by Calcite? Add it to this page and then use the “powered by Apache Calcite” logo (140 px or 240 px) on your site. fun. This release fixes CVE-2022-39135 , an XML External Entity (XEE) vulnerability that allows a SQL query to read the contents of files via the SQL functions EXISTS_NODE , EXTRACT_XML, XML_TRANSFORM or EXTRACT_VALUE. However, it appears to focus more on building query engines for tabular format files rather Dec 25, 2023 · Ignite has persistent cache snapshots and this feature is highly appreciated by Ignite users. Interface for reading connection properties within Calcite code. 0: jdbc:calcite:localhost> SELECT (CASE WHEN true or null then 1 else 0 end) from (VALUES(1)); 2016-12-06 17:12:47,622 [main] ERROR - org. net. ColoredRel(Color=[RED]) ColoredRel(Color=[GREEN]) LeafRel(Color=[BLUE]) We’ll showcase 3 different ways to manipulate this tree:-. A lexical policy describes how identifiers are quoted, whether they are converted to upper- or lower-case when they are read, and whether they are matched case-sensitively. Advanced optimization: Leveraging dynamic programming, it optimizes query plans SqlValidatorException when we use boolean AND, OR operators with null. For example, ArrayList does not implement Enumerable <F>, but you can invoke. Query("SELECT COUNT(*) FROM test") For more details, see the home page. adoptConvention (EnumerableConvention. Please create an issue on Calcite's JIRA and select avatica-go as the This paper is presenting the exploration of Apache Calcite as a foundation for the more general polystore concept, discussing architectural characteristics of the platform, its performance, implementation, and usability trade-offs, and the readiness of the technology to serve as a polystore foundation. 2) We want all GREEN nodes to always be followed by some node. Adapters → Apache Calcite is an open-source framework that allows you to build query engines, and query optimizers in particular, at a significantly lower engineering cost. 2. Connect to third-party data sources, browse metadata, and optimize by pushing the computation to the data. It is only for internal use during decorrelation. A threshold of 0 forces usage of an inline table in all cases; a threshold of Integer. Calcite-example-CSV is a fully functional adapter for Calcite that reads Jul 29, 2023 · I found Calcite quite interesting because it reuses relational algebra and optimization passes, and it supports various database backends through adapters like JDBC. Calcite’s OpenGIS implementation uses the JTS Topology Suite. calcite" % "calcite-babel" % "1. withSchemaPath ( List < String > schemaPath) Returns a catalog reader the same as this one but with a possibly different schema path. dialect, class: MssqlSqlDialect. Sep 29, 2021 · ColoredRel(Color=[GREEN]) LeafRel(Color=[BLUE]) We’ll showcase 3 different ways to manipulate this tree:-. The factory also provides methods for return type inference for arithmetic in cases where SQL 2003 is implementation defined or impractical. calcite. However, these days we see that many more companies are migrating to distributed databases that speak SQL natively. If specified, there must be a schema in this model with this name. INSTANCE. There is a method for every property. calcite:calcite-server:1. It was designed specifically to make expressing complex operations with data (such as joining, filtering Converts a Jdbc string into a RexLiteral. parseQuery() From there, you'll probably have the most success implementing the SqlVisitor interface. valueOf (12)), enums, classes, BigDecimal, BigInteger, classes that have a constructor with a parameter for each field org. XML Word Printable JSON. 14 and boolean false), boxed primitives (e. This page lists all the supported statements supported in Flink SQL for now: SELECT (Queries) CREATE TABLE, CATALOG, DATABASE, VIEW, FUNCTION DROP TABLE Dec 18, 2016 · 1. If false (the default), Calcite generates code that implements the Enumerable interface. It warrants its own node type just because we have a lot of methods to put somewhere. I want to parse a few DDL statements for my use case. @Jerry I'd suggest you ask a separate question for that. 0 I am able to parse the org. It defines methods for instantiating and combining SQL, Java, and collection types. Mar 21, 2022 · Potential Use Cases Replace custom DataFusion protobuf serialization. Sub-class should return a new copy of the relational expression. public interface CalciteConnectionConfig extends org. Sep 18, 2023 · 2) Provide default Config implementation along with Calcite. 0 I am able to parse the Background. Among others, it is worth highlighting the following. 13 version, Apache Ignite includes a new SQL engine based on the Apache Calcite framework. FoundOne if applied to an expression that contains a RexSubQuery. Specifies whether Spark should be used as the engine for processing that cannot be pushed to the source system. We do not use Github to file issues. log file is created. Optional, case-sensitive. It uses a simple adapter that makes a directory of CSV files appear to be a schema containing tables. Inelegant, but since our type system was defined before the advent of Java generics, it avoids a lot of typecasting. Go to File > Open… and open up Calcite’s root build. For instance DefaultConfig. > This also involves executing RexNode using RexImplExecutor. log and . println(c); Returns: an array containing the constants of this enum type, in the order they are declared. Can I execute master query on multiple database from one JDBC Client interface ? Represent your query in relational algebra, transform using planning rules, and optimize according to a cost model. declaration: package: org. Oct 18, 2018 · What seems to happen is Calcite adds some indirection when doing CASE. 2: create the method that take query as an input returns the SqlNode. SQL # This page describes the SQL language supported in Flink, including Data Definition Language (DDL), Data Manipulation Language (DML) and Query Language. It includes a SQL parser, an API for building expressions in relational algebra, and a query planning engine. Dump is consistent like a snapshot, which means all entries Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface. Adapters → Getting started. As a framework, Calcite does not store its own data or metadata, but instead allows external data and metadata to be accessed by means of Sep 29, 2021 · Example use case. The default implementation returns strings such as INTERVAL '1 2:3:4' DAY(4) TO SECOND(4). Visitor that collects all the top level SubQueries RexSubQuery in a projection list of a given Project. Apr 1, 2020 · Now lets coming how to parse the SQL query using Apache Calcite. In order to provide the Processor with the maximum amount of flexibility, it is configured with a Controller Service that is responsible We would like to show you a description here but the site won’t allow us. Making it pubic inner static (and making the “eval” method static as well) didn’t help. All Implemented Interfaces: Serializable, Comparable < Lex >, Constable. kts file. Some rules: JoinExtractFilterRule converts an inner join to a filter on top of a cartesian inner join . avatica. 0. FennelCartesianJoinRule implements a LogicalJoin as a cartesian product. But you could switch to use a different convention through adoptConvention(): final RelNode result = builder. Export. This is definitely doable with Calcite. Jun 13, 2017 · 7. Calcite is a community, so the first step to joining the project is to introduce yourself. Sep 10, 2022 · The Apache Calcite PMC is pleased to announce Apache Calcite release 1. e. Think of it as a toolkit for building databases: it has an industry-standard SQL parser, validator, highly customizable optimizer (with pluggable transformation rules and cost functions, relational algebra, and an extensive library of rules), but it has no preferred storage Description. This is not something which should be used in most cases (especially since the precision is arbitrary), but for IS [NOT] NULL, we don't really care about the type at all, so it's reasonable to use something that every other type can be cast to. It includes more than 80 resolved issues, comprising a lot of new features as well as performance improvements and bug-fixes. Converts an interval literal to a SQL string. Druid translates SQL statements into its native JSON-based query language . A tutorial of Apache Calcite for the BOSS'21 VLDB workshop. 0". The cache dump is essentially a file that contains all entries of a cache group at the time of dump creation. Lists of this size or greater will instead be converted to use a join against an inline table (LogicalValues) rather than a predicate. getUrl(); Connection c1 = DriverManager Aug 21, 2021 · Abstract: Apache Calcite is a dynamic data management framework. ConnectionConfig. This release introduces another way to make a copy of user data - a cache dump. SqlWriter, int, int). Apache Calcite is a dynamic data management framework, which mainly serves for mediating between applications, one or more data storage locations, and data processing engines. Integer. Alibaba’s MaxCompute big data Nov 16, 2021 · Apache Calcite is a dynamic data management framework. Alibaba MaxCompute. Moreover, Flink can be deployed on various resource providers such as YARN Calcite knows that the result must be sorted, but cannot represent its sort order as a collation, because empno is not a field in the result. rel. May 25, 2021 · Apache Calcite is an open source framework for building databases, and includes a SQL parser, relational algebra, and a highly extensible query optimizer. Overrides: unparseSqlIntervalLiteral in class SqlDialect. SQL Over Streams. I used double quote(") as literal quote string in spark sql expression, and set the parameter on my parser config, but it threw a sql parse exception: org. cast (list, Integer. 0 with 19 issues fixed by 17 Parameters: opTab - operator table to search typeFactory - Type factory funcName - name of function being invoked argTypes - argument types argNames - argument names, or null if call by position Calcite Integration for federated query (WIP) Interoperate and federate queries over other Apache Calcite adopters (Drill, Hive, Samza, Kylin) and any data source with Calcite driver support (Postgres, MySQL, etc. In this method you have to give the config like below: Any data, anywhere. SqlValidatorException: Illegal use of 'NULL' 2016-12-06 17:12:47,623 [main] ERROR - org. Feb 28, 2022 · In practical systems let’s see how cost is usually implemented. CalciteContextException: From line 1, column 27 RelDataTypeFactory is a factory for datatype descriptors. When IntelliJ asks if you want to open it as a project or a file, select project. You signed out in another tab or window. sql. An operator describing a CASE, NULLIF or. The desired row type and the row type to be converted must have the same number of fields. MAX_VALUE forces usage of OR in all cases Operand type-inference strategy where an unknown operand type is assumed to be VARCHAR(1024). isAlwaysUseParentheses() is true, we use parentheses even when they are not required by the precedence rules. An abstract base class for implementing tests against SqlValidator. May 24, 2017 · The SquareFunction is a regular class. 1: Add this plugin into your Dependencies or module where you have the database queries. public enum Lexextends Enum < Lex >. Sub-class of Join not targeted at any particular engine or calling convention. Suppose we have a simple tree like. Two new features will be discussed in detail by the engineers who developed them: ACID transactions in Phoenix through Apache Tephra A SqlCase is a node of a parse tree which represents a case statement. For the details of this algorithm, see SqlCall. SQL use cases: technology. lt iv pa ct tc zc bu yy vh lr