Github user viirya commented on the issue:
https://github.com/apache/spark/pull/18968
I'd moved the original check to `CheckAnalysis`. The valid IN subquery
should have equal size value expressions and subquery output. If not, we should
throw user-facing error.
To prevent possible issue brought by optimization rules, the additional
check is put in `resolved`. This is not user-facing error. I think we can rely
the newly proposed structural integrity check to detect this.
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