Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14240#discussion_r71646312
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/sources/PrunedScanSuite.scala ---
@@ -114,16 +114,15 @@ class PrunedScanSuite extends DataSourceTest with
SharedSQLContext {
testPruning("SELECT * FROM oneToTenPruned", "a", "b")
testPruning("SELECT a, b FROM oneToTenPruned", "a", "b")
testPruning("SELECT b, a FROM oneToTenPruned", "b", "a")
- testPruning("SELECT b, b FROM oneToTenPruned", "b")
+ testPruning("SELECT b, b FROM oneToTenPruned", "b", "b")
+ testPruning("SELECT b as alias_b, b FROM oneToTenPruned", "b")
--- End diff --
I like your point! Your concern is valid. We should be careful when making
an assumption on the external data source implementation! : )
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