is TRUE in case the exception is not NULL, i.e. the query failed
returns the DbUtils instance that was executed the query
returns the exception, if one happened, otherwise NULL
returns the maximum number of rows to retrieve. 0 means all.
returns the query that was executed
returns the resultset that was produced, can be null in case the query failed
whether a ResultSet was produced, e.g. DDL commands like delete, drop or update
do not produce one.