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Re: text vs varchar
Posted by: Rick James
Date: April 30, 2016 11:51PM

"when fetching the data from InnoDB, the server will allocate space for all VARCHAR columns" -- Please elaborate.

Are you referring to what happens if a tmp table is needed because of the complexity of the SELECT? In which case, I thought it turned VARCHAR into CHAR, thereby leading to 257 or 767 bytes in the MEMORY temp table versus being forced to use MyISAM (which is slower).

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