Julian Hyde created CALCITE-460:
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Summary: Add ImmutableBitSet and replace uses of BitSet
Key: CALCITE-460
URL: https://issues.apache.org/jira/browse/CALCITE-460
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Calcite makes heavy use of bit sets. java.util.BitSet has a convenient API but
(a) is mutable, (b) uses quite a lot of memory, (c) is not iterable.
Propose to implement ImmutableBitSet, which addresses those deficiencies.
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