Query Rewrite: What is MySQL Doing To My Queries?

The Impact of Query Rewrite on MySQL Query Optimization When processing a query, every relational database vendor takes a number of similar steps to parse, validate, and optimize a query. MySQL does the following: Validates the query syntax — does it use valid...
Why I Avoid Database Hints: a followup

Why I Avoid Database Hints: a followup

In an earlier blog post about database hints, I gave a number of reasons why I dont like to use hints in SQL queries. Today I wanted to follow up to share one situation where I think hints are OK, even necessary. As described very well in an article in an article by...

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