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Some news on the MySQL optimizer

Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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Some news on the MySQL optimizer | roylyseng.blogspot.com Reviews

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Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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1 select nation

2 semi join optimization

3 semi join execution strategies

4 firstmatch

5 duplicateweedout

6 materialization

7 loosescan

8 controlling semi join strategies

9 set optimizer switch='semijoin=on

10 semi join firstmatch strategy

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Some news on the MySQL optimizer | roylyseng.blogspot.com Reviews

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Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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Some news on the MySQL optimizer: Semi-join in MySQL 5.6

http://roylyseng.blogspot.com/2012/04/semi-join-in-mysql-56.html

Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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Some news on the MySQL optimizer: April 2012

http://roylyseng.blogspot.com/2012_04_01_archive.html

Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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Some news on the MySQL optimizer

Some news on the MySQL optimizer. Tuesday, 10 April 2012. Semi-join in MySQL 5.6. MySQL 5.6.5 Development Milestone Release has a whole new set of algorithms for processing subqueries. It is based on transforming a subquery into a semi-join operation. And then treating semi-join like another join operation throughout the optimizer. A subquery can be transformed to a semi-join if it matches these criteria:. The subquery is part of an IN or =ANY predicate. It cannot be e.g. NOT IN. SELECT * FROM nation.

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