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Cleanup obsolete CHAR vs VARCHAR note

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Slam 2019-03-22 15:36:58 +02:00 committed by GitHub
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@ -901,8 +901,6 @@ Benchmarking and profiling might point you to the following optimizations.
##### Tighten up the schema ##### Tighten up the schema
* MySQL dumps to disk in contiguous blocks for fast access. * MySQL dumps to disk in contiguous blocks for fast access.
* Use `CHAR` instead of `VARCHAR` for fixed-length fields.
* `CHAR` effectively allows for fast, random access, whereas with `VARCHAR`, you must find the end of a string before moving onto the next one.
* Use `TEXT` for large blocks of text such as blog posts. `TEXT` also allows for boolean searches. Using a `TEXT` field results in storing a pointer on disk that is used to locate the text block. * Use `TEXT` for large blocks of text such as blog posts. `TEXT` also allows for boolean searches. Using a `TEXT` field results in storing a pointer on disk that is used to locate the text block.
* Use `INT` for larger numbers up to 2^32 or 4 billion. * Use `INT` for larger numbers up to 2^32 or 4 billion.
* Use `DECIMAL` for currency to avoid floating point representation errors. * Use `DECIMAL` for currency to avoid floating point representation errors.