[Bug] Fix bug that the min/max function has an error in handling string null values #5189
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…ng null values. null should be ignored in min/max function. And if there is no data, null should be return.
EmmyMiao87
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Jan 26, 2021
…ng null values. (apache#5189) null should be ignored in min/max function. And if there is no data, null should be return. Co-authored-by: morningman <chenmingyu@baidu.com>
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Proposed changes
null should be ignored in min/max function.
And if there is no data, null should be return.
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