Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/322#discussion_r22339914
--- Diff:
tajo-catalog/tajo-catalog-common/src/main/java/org/apache/tajo/catalog/Schema.java
---
@@ -199,6 +199,12 @@ private RuntimeException
throwAmbiguousFieldException(Collection<Integer> idList
}
public int getColumnId(String name) {
+ // if the same column exists, immediately return that column.
+ if (fieldsByQualifiedName.containsKey(name)) {
--- End diff --
The same condition is checked at Line 210.
Furthermore, the below line also checks whether the given name is qualified
or not.
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