Mroonga 4.04 has been released!
Mroonga 4.04 has been released!
- How to install: Install
- How to upgrade: Upgrade guide
Changes
This release supports inplace adding or dropping a column!
You can adding or dropping a column quickly.
Normal adding or dropping a column is slow because they uses the following sequence:
- Creates a new temporary table.
- The temporary table uses schema that is applied adding and/or dropping a column changes.
- Copies all data to the new temporary table from the existing table.
- Renamed the existing table.
- Renamed the new temporary table to the existing table.
- Removed the existing table.
"Copies all data" process in the sequence is slow. If the existing table has many data, it is very slow.
Inplace adding or dropping a column uses the following sequence:
- Adds or drops a column to the existing table.
The sequence doesn't have "copy" process. So it is fast.
Conclusion
See Release 4.04 - 2014/07/29 about detailed changes since 4.03.
Let's search by Mroonga!