xianyinxin opened a new pull request #25652: [SPARK-28950] FollowingUp of SPARK-28351: Change whereClause to be optional in DELETE URL: https://github.com/apache/spark/pull/25652 ### What changes were proposed in this pull request? This pr makes `whereClause` to be optional, in which case DELETE will delete all of the data of a table. This is a following-up of SPARK-28351. ### Why are the changes needed? An optional where clause in DELETE respects the SQL standard. ### Does this PR introduce any user-facing change? Yes. But since this is a non-released feature, this change does not have any end-user affects. ### How was this patch tested? New case is added.
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