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BigQuery: Deprecate automatic schema conversion in load_table_from_dataframe() - #9176
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tswast
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Closes#9042.
This PR adds a deprecation warning if a schema cannot be autodetected in full, and a fallback to
to_parquetlogic is needed.How to test
Try loading data into a new table from a dataframe with at least one column whose dtype is "object" (e.g. a STRING column), and without providing an explicit schema in JobConfig. The
load_table_from_dataframe()method should issue a (pending) deprecation warning.