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  1. Calcite
  2. CALCITE-509

RelMdColumnUniqueness uses ImmutableBitSet.Builder twice, gets NullPointerException

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: None
        • Fix Version/s: 1.0.0-incubating
        • Component/s: None
        • Labels:

          Description

          RelMdColumnUniqueness.areColumnsUnique gets the following stack:

          ava.lang.NullPointerException
	at org.apache.calcite.util.ImmutableBitSet.countBits(ImmutableBitSet.java:280)
	at org.apache.calcite.util.ImmutableBitSet.access$600(ImmutableBitSet.java:36)
	at org.apache.calcite.util.ImmutableBitSet$Builder.cardinality(ImmutableBitSet.java:799)
	at org.apache.calcite.rel.metadata.RelMdColumnUniqueness.areColumnsUnique(RelMdColumnUniqueness.java:178)

          The cause is that it populates an ImmutableBitSet.Builder, calls build on it, then calls cardinality. That is not allowed – once build has been called the builder cannot be re-used, even for cardinality.

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            julianhyde Julian Hyde added a comment -

            Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/b1d22c7e.

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            julianhyde Julian Hyde added a comment - Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/b1d22c7e .
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            julianhyde Julian Hyde added a comment -

            Closing now that 1.0.0-incubating has been released.

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            julianhyde Julian Hyde added a comment - Closing now that 1.0.0-incubating has been released.

              People

              • Assignee:
                julianhyde Julian Hyde
                Reporter:
                julianhyde Julian Hyde
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                Dates

                • Created:
                  Updated:
                  Resolved:

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