EmmyMiao87 opened a new issue #6225:
URL: https://github.com/apache/incubator-doris/issues/6225
# background
The current JoinReorder algorithm mainly sorts according to the star
model, and only considers the query association relationship between the table
and the table.
His problem is:
1. Only applicable to user data whose data model is a star model, data
of other models cannot be sorted.
2. Regardless of the cost consumption of the table, it is impossible to
determine the size of the join table relationship, and the real query
optimization ability is weak.
3. It is not possible to avoid possible time-consuming joins such as
cross joins by sorting.
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