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2. Apache Calcite - Wikipedia

   en.wikipedia.org/wiki/Apache_Calcite

   Free and open-source software portal; Apache Calcite is an open source framework for building databases and data management systems. It includes a SQL parser, an API for building expressions in relational algebra, and a query planning engine.

3. Query optimization - Wikipedia

   en.wikipedia.org/wiki/Query_optimization

   The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans. [1] Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization ...

4. Query plan - Wikipedia

   en.wikipedia.org/wiki/Query_plan

   Some query tools can generate embedded hints in the query, for use by the optimizer. Some databases - like Oracle - provide a plan table for query tuning. This plan table will return the cost and time for executing a query. Oracle offers two optimization approaches: CBO or Cost Based Optimization; RBO or Rule Based Optimization

5. Trino (SQL query engine) - Wikipedia

   en.wikipedia.org/wiki/Trino_(SQL_query_engine)

   Trino is an open-source distributed SQL query engine designed to query large data sets distributed over one or more heterogeneous data sources. [1] Trino can query data lakes that contain a variety of file formats such as simple row-oriented CSV and JSON data files to more performant open column-oriented data file formats like ORC or Parquet [2] [3] residing on different storage systems like ...

6. Query rewriting - Wikipedia

   en.wikipedia.org/wiki/Query_Rewriting

   Query rewriting is a typically automatic transformation that takes a set of database tables, views, and/or queries, usually indices, often gathered data and query statistics, and other metadata, and yields a set of different queries, which produce the same results but execute with better performance (for example, faster, or with lower memory use). [1]

7. Toad (software) - Wikipedia

   en.wikipedia.org/wiki/Toad_(software)

   Toad is a database management toolset from Quest Software for managing relational and non-relational databases using SQL aimed at database developers, database administrators, and data analysts. The Toad toolset runs against Oracle, SQL Server, IBM DB2 (LUW & z/OS), SAP and MySQL. A Toad product for data preparation supports many data platforms.

8. Relational calculus - Wikipedia

   en.wikipedia.org/wiki/Relational_calculus

   Query optimization consists in determining from a query the most efficient manner (or manners) to execute it. Query optimization can be formalized as translating a relational calculus expression delivering an answer A into efficient relational algebraic expressions delivering the same answer A.

9. Presto (SQL query engine) - Wikipedia

   en.wikipedia.org/wiki/Presto_(SQL_query_engine)

   Presto (including PrestoDB, and PrestoSQL which was re-branded to Trino) is a distributed query engine for big data using the SQL query language. Its architecture allows users to query data sources such as Hadoop, Cassandra, Kafka, AWS S3, Alluxio, MySQL, MongoDB and Teradata, [1] and allows use of multiple data sources within a query.