Josef Adersberger issues

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                                            Josef Adersberger

Allow NaN as value

see Apache Commons Math Double.NaN

Predicate pushdown for all ChronixRDD and ChronixSparkContext methods

Implement solr query abstraction & transparent predicate pushdown

- Solr query abstraction like in the AIR project (maybe reuse this) - Provide a builder to create time series specific solr queries including the Chronix-specific Solr extensions - Modify...

Implement Dataset with TimeSeries

... but a new TimeSeries POJO datatype has to be introduced before (see #3, #2)

Provide streaming access to time series data

also Solr supports streaming of data. We can use a full-stack streaming approach. But right now we should wait a little bit until the support of streaming in data frames...

Allow non-float values

Currently the time series values are of type float. Consider to allow other types like Strings for log processing or Currency for stock quotes.