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alamb avatar alamb commented on August 25, 2024

This PR adds a test: #11017

# Could push the filter (column1 = 2) down below unnest
# https://github.com/apache/datafusion/issues/11016
query TT
explain select uc2, column1 from  (select unnest(column2) as uc2, column1 from v) where uc2 > 3 AND column1 = 2;
----
logical_plan
01)Projection: unnest(v.column2) AS uc2, v.column1
02)--Filter: unnest(v.column2) > Int64(3) AND v.column1 = Int64(2)
03)----Unnest: lists[unnest(v.column2)] structs[]
04)------Projection: v.column2 AS unnest(v.column2), v.column1
05)--------TableScan: v projection=[column1, column2]

The plan could look something like this

logical_plan
01)Projection: unnest(v.column2) AS uc2, v.column1
02)--Filter: unnest(v.column2) > Int64(3)
03)----Unnest: lists[unnest(v.column2)] structs[]
04)------Projection: v.column2 AS unnest(v.column2), v.column1
05)--------Filter: v.column1 = Int64(2)    <-- Note this filter is pushed down
06)----------TableScan: v projection=[column1, column2]

from arrow-datafusion.

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