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34112519c2
3 important changes: 1. FieldTypeInference had a bug when dealing with multiple datatypes for the same field where some (but not all) were in a wider-than-the-other relationship. Before: Some datatypes could be lost. String was wider than any other. After: Consistent behaviour. String is NOT wider than any other. 2. Choosing a datatype for a value from a ChoiceDataType: Before it chose the first compatible datatype as the basis of conversion. After change it tries to find the most suitable datatype. 3. Conversion of a value of avro union type: Before it chose the first compatible datatype as the basis of conversion. After change it tries to find the most suitable datatype. Change: In the RecordFieldType enum moved TIMESTAMP ahead of DATE. This closes #3724. Signed-off-by: Mark Payne <markap14@hotmail.com>