snuyanzin commented on PR #24526:
URL: https://github.com/apache/flink/pull/24526#issuecomment-2124050180
so far I see this kind of trade-off
### multi-set semantics (with duplicates)
pros
1. It covers more cases as mentioned above
2. there is already implemented `array_except` with this semantic and it
would make sense to follow this way
P.S. earlier I wrote why I do not consider `array_union`
cons
1. there is only Snowflake from well known vendors who supports it
It would be great to see other opinions
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