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Bhathiya edited Abstract.tex
about 8 years ago
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You can get started by \textbf{double clicking} Query optimization is one of the most important steps in relational databases. Almost all the relational database systems such as MySQL, Postgres, Oracle DB, Apache Derbyconsist of query optimizers. Major challenge in query optimization is deciding optimum plan to execute join query. According to some researches that has been conducted related to this
text block problem, left-deep tree and
begin editing. You can also click bushy trees are two main approaches to solve the
\textbf{Text} button below problem[1]. Apache Derby is a relational database entirely written in java. Currently Apache Derby optimizer only consider left-deep tree in its query processing. Our approach is to
add new block elements. Or you can \textbf{drag and drop an image} right onto this text. Happy writing! implement bushy tree support for derby optimizer.However research has shown that constructing bushy tree execution plans is NP hard[2]. Therefore we are introducing heuristics that would minimize evaluations time significantly
