I am not very keen on having utility script. But, "no side-effects without explicit ask by the end-user" is important.
~ Yogi On 13 January 2017 at 16:44, Priyanka Gugale <pri...@apache.org> wrote: > IMO it's okay to create table in java code. We should document it in > operator guide as well as put a log message when we create table. > And in case you don't have privileges, the operator should throw meaningful > message. > > -Priyanka > > On Fri, Jan 13, 2017 at 4:07 PM, Yogi Devendra <yogideven...@apache.org> > wrote: > > > My suggestions: > > > > 1. Have a separate utility script for creating this table. > > 2. Have README for the utility script > > 3. Mention about the utility script in the operator javadocs. > > 4. Mention about the utility script in the application README. > > 5. If at all, you wish to ease out the process; you can introduce flag > > like autoPopulateMetaTable. But. default value of this flag should to > be > > off. > > 6. I would prefer to avoid side-effects unless explicitly asked by the > > end user. > > 7. Relevant exceptions should be caught and should have a message > which > > can be understood by the end user. > > > > ~ Yogi > > > > On 13 January 2017 at 15:57, Hitesh Kapoor <hit...@datatorrent.com> > wrote: > > > > > Hi All, > > > > > > Currently to use JdbcPOJOInsertOutputOperator, user needs to create > > > "dt_meta" table to enforce > > > exactly-once processing semantic. If the user fails to create this > table > > > before launching the application an exception is thrown. > > > To handle this scenario we can automate the process of creating this > > table, > > > assuming the user has the appropriate privileges. The problem with this > > > approach is that it may not be a very good idea to modify user's > database > > > automatically , also if the user doesn't has the appropriate privileges > > it > > > will eventually throw an exception (however a different exception). > > > So I need your opinion if we should automate the creation of this > > internal > > > table (if it doesn't exists) or continue with the existing behaviour or > > > anything else. > > > > > > Regards, > > > Hitesh > > > > > >
