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Enable automatic type deduction for columns built from lists of dataframes. #386

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Summary:
Enable type inference functions to automatically deduce the row types when a
column is built from a list of dataframe objects without supplying the "dtype"
parameter.

REMARKS:

  1. The same issue occurs when supplying a list of columns as input rather than
    a list of dataframes. This will be addressed in a subsequent commit once this
    diff is reviewed.

  2. The "ta.velox_rt.list_column_cpu.ListColumnCpu" import is placed in an awkward
    location because of a circular import issue.

Reviewed By: OswinC

Differential Revision: D37240169

…rames.

Summary:
Enable type inference functions to automatically deduce the row types when a
column is built from a list of dataframe objects without supplying the "dtype"
parameter.

REMARKS:
1. The same issue occurs when supplying a list of columns as input rather than
a list of dataframes. This will be addressed in a subsequent commit once this
diff is reviewed.

2. The "ta.velox_rt.list_column_cpu.ListColumnCpu" import is placed in an awkward
location because of a circular import issue.

Reviewed By: OswinC

Differential Revision: D37240169

fbshipit-source-id: 29e6156de8ed178af655d6380677b08f8bb63da0
@facebook-github-bot facebook-github-bot added CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. fb-exported labels Jun 17, 2022
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This pull request was exported from Phabricator. Differential Revision: D37240169

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