Shouldn't be able to add an HCatFieldSchema with the same name as existing
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Key: HCATALOG-17
URL: https://issues.apache.org/jira/browse/HCATALOG-17
Project: HCatalog
Issue Type: Bug
Reporter: Jakob Homan
Assignee: Jakob Homan
(cloning from https://github.com/yahoo/howl/pull/6)
As noted in HowlSchema.java, one should not be able to append an a field schema
with the same name. The code says that this requires Comparable, which is not
correct, since we're not doing ordering. Technically, this requires a correct
equals, but since we don't want multiple fields with the same name in a schema
(particularly since we index it via the name in the accompanying map), the
correct check is just based on the name. This adds the check and throws a
HowlException if this occurs.
Unit test to verify is included.
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