Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14240#discussion_r71562777
--- 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 --
When we do not return two columns, we will always have a `ProjectExec`
above the table scan:
```
*Project [b#222 AS alias_b#240, b#222]
+- InMemoryTableScan [b#222]
```
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