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[MySQL 5.7 Reference] Typo in 9.8.2 EXPLAIN Output Format
Posted by: Wang Robin
Date: April 04, 2017 03:21AM

I found a type when reading 9.8.2 EXPLAIN Output Format of [MySQL 5.7 Reference].

Here's how the reference describes the "key_len" column of the explain output.

"The key_len column indicates the length of the key that MySQL decided to use. The value of key_len enables you to determine how many parts of a multiple-part key MySQL actually uses. If the key column says NULL, the len_len column also says NULL."

I believe the "len_len column" in the last sentence of the above paragraph is a typo and should be "key_len column".

Hope it will be corrected for MySQL 5.7/8.0 reference.

Robin Wang

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[MySQL 5.7 Reference] Typo in 9.8.2 EXPLAIN Output Format
April 04, 2017 03:21AM

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