GqlQuery - Allow binding of null

[sai-pullabhotla]

The GqlQuery.Builder's addBinding and setBinding methods allow binding of various data types, but not a null. Can the API be enhanced to allow binding of a null/NullValue instead of having to use different GqlSyntax based on the search string (null vs not null)?

[sai-pullabhotla]

Looking through the code, I found that when an empty array is passed, it is interpreted as a NullValue. However, since there are multiple addBinding/setBinding methods for each type, we cannot just use -

builder.addBinding()

That causes ambiguity to the compiler.

so, one could use

addBinding(new boolean[0]) or addBinding(new String[0]) to actually search for a null. This is not that intuitive. Perhaps, another method addNullBinding() and setNullBinding() might be a better option?

[yihanzhen]

This is added to our feature backlog: https://github.com/GoogleCloudPlatform/google-cloud-java/wiki/Feature-backlog . This issue will be closed but is linked in the backlog and can continue to be used for comment and discussion.