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[KYLIN-3491] Improve the cube building process when using global dictionary - Kylin - [issue]
...By current cubing process, if the global dictionary is very large, since the raw data records are unsorted, it's hard to encode raw values into ids for the input of bitmap due to frequent sw...    Author: Zhong Yanghong , 2018-10-07, 14:40
[KYLIN-3489] Improve the efficiency of enumerating dictionary values - Kylin - [issue]
...Currently, to enumerate all of the values of a dictionary, we enumerate the ids first and then get the related values. The compute complexity is nlogn. We can achieve the compute complexity ...    Author: Zhong Yanghong , 2018-09-17, 00:59
[KYLIN-3480] Change the conformance of calcite from default to lenient - Kylin - [issue]
...By this change, Kylin can support GroupByOrdinal & SortByOrdinal group by 1,2,... order by 1,2,......    Author: Zhong Yanghong , 2018-09-17, 00:59
[KYLIN-3490] For single column queries, only dictionaries are enough - Kylin - [issue]
...A common use case for BI tools is as follows: Firstly, extract all of the values of a dimension column Then, select part of the values as filter condition.Previously query for the first step...    Author: Zhong Yanghong , 2018-09-17, 00:59
[KYLIN-2895] Refine query cache - Kylin - [issue]    Author: Zhong Yanghong , 2018-09-14, 03:54
[KYLIN-3359] Support sum(expression) if possible - Kylin - [issue]
...The expression can be as follows: a 1*col 1 + a 2*col 2 + ... + a n*col n + b, if sum(col 1),sum(col 2),...sum(col n) are defined case when filter 1 then expr 1 when filter 2 then expr ...    Author: Zhong Yanghong , 2018-09-14, 03:16
[KYLIN-2899] Enable segment level query cache - Kylin - [issue]    Author: Zhong Yanghong , 2018-09-14, 01:49
[KYLIN-3512] No need to enable when the query is related to count distinct of bitmap - Kylin - [issue]
...As we know, roaring bitmap will compress its contents. There's no need to use CompressionUtils.compress to compress again the results of each region, which is time consuming and whose compre...    Author: Zhong Yanghong , 2018-09-14, 01:30
[KYLIN-2973] Potential issue of not atomically update cube instance map - Kylin - [issue]
...P1        try {            getStore().putResource(cube.getResourcePath(), cube, CUBE_SERIALIZER);        } catch (Illega...    Author: Zhong Yanghong , 2018-09-14, 01:28
[KYLIN-3520] Deal with NULL values of measures for inmem cubing - Kylin - [issue]
...Previously NULL values will be dealt for dimensions during both layered cubing and inmem cubing. However, NULL values of measures only are dealt for layered cubing. NULL values of measures f...    Author: Zhong Yanghong , 2018-09-13, 02:21