Dynamic Quoted Value List Column

While working on an autosuggest custom tag, I am allowing the user to pass in either an array or a query. If a query, I need to loop through each column and add it to the possible suggestions. I cannot however get the dynamic column name to read without CF7.02 throwing an error. I have attached the snippet. The error received is: Invalid CFML construct found on line 98 at column 77.

ColdFusion was looking at the following text: [

Any help would be much appreciated.