Home > DeveloperSection > Interviews > What are HEAP tables in MySQL?

Posted on    February-10-2014 12:01 AM

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Sumit Kesarwani

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Posted on    February-10-2014 1:00 AM

HEAP tables are in-memory. They are usually used for high-speed temporary storage.

No TEXT or BLOB fields are allowed within HEAP tables.

You can only use the comparison operators = and ‹=›.

HEAP tables do not support AUTO_INCREMENT.

Indexes must be NOT NULL.

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