Druid 0.17.0 Version : After upgrade not able to query null values using search query insensitive contains

Hi,

I want to query using null value as filter but in druid 0.17.0 version i am facing some issues

For Query 1 using “value”: null

I get all result

For Query 2 using “value”: “null” :

I get values having null as substring, but not actual null values

For Query 3 using “value”: “”, :

I get all values

Can someone help in this ?

PS : We have null value for this dimensions, can get those values without using filters.