seddonm1 opened a new pull request #778:
URL: https://github.com/apache/arrow-datafusion/pull/778
# Which issue does this PR close?
Closes #777.
# Rationale for this change
Currently the Logical Plan builder assumes that the join conditions fields
are provided in the same order as the tables are specified. This is different
behavior to how Postgres works which does not care about the order of the
tables listed in the condition. This PR aims to rectify this discrepancy.
# What changes are included in this PR?
This change allows the conditions to be reversed and will fail as previously
if neither relation contains the column. A lot of the tests in `sql.rs` have
been updated to test both conditions.
# Are there any user-facing changes?
This does not change public APIs, and should not be noticeable by any
current users.
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