What is heap table in Mysql?

Answer 1

• Tables that are present in the memory are called as HEAP tables.

• When creating a HEAP table in MySql, user needs to specify the TYPE as HEAP.

• These tables are now more commonly known as memory tables.

• These memory tables never have values with data type like “BLOB” or “TEXT”. They use indexes which make them faster.

• They use a hashed index and are stored in the memory.

• This makes them very fast but if MYSQL crashes all data stored in them can be lost.

• It is very useful as a temporary table.

• The internal heap tables use 100% dynamic hashing without the overflow areas.

• They do not have a problem with delete and insert.

Answer 2

Tables that are present in the memory are called as HEAP tables.

• When creating a HEAP table in MySql, user needs to specify the TYPE as HEAP.

• These tables are now more commonly known as memory tables.

• These memory tables never have values with data type like “BLOB” or “TEXT”. They use indexes which make them faster.

• They use a hashed index and are stored in the memory.

• It is very useful as a temporary table.

• The internal heap tables use 100% dynamic hashing without the overflow areas.

• They do not have a problem with delete and insert.