cloud-fan commented on code in PR #38800:
URL: https://github.com/apache/spark/pull/38800#discussion_r1033281998
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connector/connect/src/main/protobuf/spark/connect/expressions.proto:
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@@ -40,37 +40,34 @@ message Expression {
message Literal {
oneof literal_type {
Review Comment:
In catalyst, `Literal` is consist of value and type. The benefit is, there
aren't many physical values (timestamp and timestamp ntz are both int64). When
we need to add a new data type with existing physical values (e.g. char are
varchar), we don't need to update `Literal`.
This is not a design decision made by this PR, so I won't block this PR for
this reason.
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