Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22124#discussion_r210799343
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
---
@@ -490,7 +490,8 @@ object DDLPreprocessingUtils {
case (expected, actual) =>
if (expected.dataType.sameType(actual.dataType) &&
expected.name == actual.name &&
- expected.metadata == actual.metadata) {
+ expected.metadata == actual.metadata &&
+ expected.exprId.id == actual.exprId.id) {
--- End diff --
why does this fix the problem?
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