Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/3338#discussion_r101977849
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/ExpressionReductionTest.scala
---
@@ -155,15 +155,15 @@ class ExpressionReductionTest extends TableTestBase {
"DataSetCalc",
batchTableNode(0),
term("select",
- "13 AS _c0",
+ "CAST(13) AS _c0",
--- End diff --
Do you know why there are so many unnecessary casts? Is it because of the
different nullability?
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