BQ Sink is failing when Feature consists of only null values #853
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What this PR does / why we need it:
Schema can't be inferred when one of the features has only nulls in
FeatureRowBatch
that is used to compress FeatureRows while waiting for BQ job to load.This PR fixes NPE
Which issue(s) this PR fixes:
Fixes #
Does this PR introduce a user-facing change?: