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## What changes were proposed in this pull request? In Spark SQL, some expression may output safe format values, e.g. `CreateArray`, `CreateStruct`, `Cast`, etc. When we compare 2 values, we should be able to compare safe and unsafe formats. The `GreaterThan`, `LessThan`, etc. in Spark SQL already handles it, but the `EqualTo` doesn't. This PR fixes it. ## How was this patch tested? new unit test and regression test Author: Wenchen Fan <wenchen@databricks.com> Closes #15929 from cloud-fan/type-aware. |
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