Exist doesn't work for NULL value

[HarrisChu]

(root@nebula) [nba]> match (n:player) WHERE not exists(n.name) return n
Empty set (time spent 7844/11330 us)

Wed, 07 Jul 2021 14:04:24 CST

(root@nebula) [nba]>
(root@nebula) [nba]>
(root@nebula) [nba]>
(root@nebula) [nba]> match (n:player) WHERE n.name is null return n
+--------------------------------------------+
| n                                          |
+--------------------------------------------+
| ("Null4" :player{age: -4, name: __NULL__}) |
+--------------------------------------------+
| ("Null3" :player{age: -3, name: __NULL__}) |
+--------------------------------------------+
| ("Null2" :player{age: -2, name: __NULL__}) |
+--------------------------------------------+
| ("Null1" :player{age: -1, name: __NULL__}) |
+--------------------------------------------+
Got 4 rows (time spent 6591/10193 us)

Wed, 07 Jul 2021 14:04:27 CST

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