avantgardnerio opened a new pull request, #2885:
URL: https://github.com/apache/arrow-datafusion/pull/2885
# Which issue does this PR close?
Closes #159 , #160, #163, #168, #171, #172, #175
# Rationale for this change
Getting the TPC-H queries to work allows Datafusion users and potential
users to compare standard benchmarks to decide if Datafusion is the correct
choice for their use case.
# What changes are included in this PR?
3 new query optimizers:
1. decorrelate_scalar_subquery
2. decorrelate_where_exists
3. decorrelate_where_in
# Are there any user-facing changes?
Correlated subqueries should work, but likely some will break or return
incorrect results (thus the "draft" status).
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