Can I concatenate strings in jql?

[Wayne Walker]

I want to use this query:

 issueFunction in commented('by wwalker') and assignee != 'wwalker'

but I want to share it so it should use currentUser():

 issueFunction in commented('by' currentUser()) and assignee != currentUser()

but that doesnt' work and I can't find anything about string functions or concatenation in the manual ( https://confluence.atlassian.com/display/JIRA/Advanced+Searching - is there a straightforward JQL reference??)

[SanaS]

Sorry, it seems it's been requested but not implemented yet:

https://jamieechlin.atlassian.net/browse/GRV-250