ulysses-you commented on code in PR #5752:
URL: https://github.com/apache/incubator-gluten/pull/5752#discussion_r1602624507
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gluten-core/src/main/scala/org/apache/gluten/expression/ExpressionTransformer.scala:
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@@ -18,6 +18,15 @@ package org.apache.gluten.expression
import org.apache.gluten.substrait.expression.ExpressionNode
+import org.apache.spark.sql.catalyst.expressions.Expression
+import org.apache.spark.sql.types.DataType
+
trait ExpressionTransformer {
Review Comment:
Some expression transformer did not catch orginal expression. e.g.,
`BoundReferenceTransformer`, `AttributeReferenceTransformer`, etc. So I leave
it in this pr.
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