The parameter count methods in the PgSQL class have changed
- the function returns a unique list of $ parameters
The count is now done in the DB IO part where it counts over the unique array
Query hash is stored like the query for the current run one (reset on dbExec call).
The method to create the hash is renamed to dbBuildQueryHash instead of "Get".
The dbGetQueryHash function now just returns the last set query hash. There is a matching dbResetQueryHash for unsetting the query hash.
* Correct wrong comment lookup
* simplify regex by excluding comment and string blocks before
* simpler lookup for each type
* update checks for more tests for various special cases
In DB IO
* add a function to return all placeholders found in a query
* only numbered parameters are looked up
