GH-3679: Allow TimestampType to annotate FLBA(12)#3680
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Rationale for this change
See parquet-format issue apache/parquet-format#600 and the linked proposal document for rationale
What changes are included in this PR?
This PR implements support for the
TimestampTypelogical type annotation onFIXED_LEN_BYTE_ARRAYphysical type values withtype_length=12(96 bits).Are these changes tested?
Yes, several test files are updated along with the source.
Are there any user-facing changes?
Users will be able to declare schemas with this physical/logical type combination. No API changes.
Closes #3679