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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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Subject Views Written By Posted
text vs varchar 798 hua kai 04/28/2016 08:36AM
Re: text vs varchar 407 Øystein Grøvlen 04/29/2016 12:41AM
Re: text vs varchar 413 Rick James 04/30/2016 11:51PM
Re: text vs varchar 448 Øystein Grøvlen 05/02/2016 04:37AM
Re: text vs varchar 386 hua kai 05/02/2016 09:14PM
Re: text vs varchar 385 Øystein Grøvlen 05/03/2016 02:19AM
Re: text vs varchar 604 hua kai 05/03/2016 04:12AM
Re: text vs varchar 371 hua kai 05/02/2016 08:02PM
Re: text vs varchar 489 Øystein Grøvlen 05/03/2016 02:25AM

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