Anders Sundelin created AVRO-2075:
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Summary: Allow SchemaCompatibility to report possibly lossy
conversions
Key: AVRO-2075
URL: https://issues.apache.org/jira/browse/AVRO-2075
Project: Avro
Issue Type: Improvement
Affects Versions: 1.8.2, 1.7.7
Environment: Java
Reporter: Anders Sundelin
Priority: Minor
It is stated in the Avro spec that int and long values are promotable to floats
and doubles.
However, numeric promotions to floats are lossy (losing precision), as is long
promotion to double.
It is suggested that the SchemaCompatibility class is updated to be able to
flag conversions that have the possibility to be lossy as errors. The attached
patch does just that, by adding a new boolean flag (allowDataLoss), preserving
backwards compatibility by defaulting this flag to true.
Testcases illustrating the problem has been added to the unit test class
TestReadingWritingDataInEvolvedSchemas
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