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I found that there is not much info about "IS EMPTY" in nebula docs, i think it's used for variables which does not exist, and "IS NULL" is used for variables which exists but with invalid values.I am not sure if this understanding is correct, can someone help answer this?
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I found that there is not much info about "IS EMPTY" in nebula docs, i think it's used for variables which does not exist, and "IS NULL" is used for variables which exists but with invalid values.I am not sure if this understanding is correct, can someone help answer this?
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