Haisheng Yuan created CALCITE-4083:
--------------------------------------
Summary: RelTraitSet failed to canonize traits
Key: CALCITE-4083
URL: https://issues.apache.org/jira/browse/CALCITE-4083
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Haisheng Yuan
RelTraitSet#plus uses FlatLists and ImmutableList. They have different hash
algorithms, and they are all different classes from RelTraitSet. The
RelTraitSet equality requires the other object must be RelTraitSet too, and the
HashMap#get(key) uses key.equals() to check equality, instead of the other way.
In case we pass RelTraitSet as the search key to cache, but the cached entry
has key with FlatLists or ImmutableList, we may fail to find the cached
RelTraitSet. Due to this, using == to check traitSet equality may fail, even
they have same traits.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
