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[DRILL-5464] Fix JSON reader when it deals with empty file -
Drill - [issue]
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| ...An empty json file is the one without any json object. If we query an empty json file asking it to return column 'A', Drill's JSON record reader would return a batch with 0 row, ... |
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Switch between new parquet reader and old one -
Drill - [mail # dev]
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| ...That makes sense. We should only check the requested columns, not everycolumn in parquet file, to decide which parquet reader to use.On Wed, Sep 13, 2017 at 4:17 PM, Damien Profeta wrote:>... |
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[DRILL-5773] Project pushdown into a subquery with select * -
Drill - [issue]
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| ...If a subquery / table expression/ view has a `select *` and out query is requesting a subset of columns/fields, Drill currently does not do project pushdown into the subquery. As a result, t... |
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multiple logback.xml in the project -
Drill - [mail # dev]
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| ...Makes sense to simply logback.xml to 2 : one for distribution, another onefor unit test.I did not run into conflicts resulting from multiple logback.xml in thepast (possibly because I used I... |
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[DRILL-5480] Empty batch returning from HBase may cause SchemChangeException even when data does not have different schema -
Drill - [issue]
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| ...The following repo was provided by Hao Zhu.1. Create a Hbase table with 4 regionscreate 'myhbase', 'cf1','cf2', {SPLITS => ['a', 'b', 'c']}put 'myhbase','a','cf1:col1','somedata'put 'myhb... |
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[DRILL-5546] Schema change problems caused by empty batch -
Drill - [issue]
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| ...There have been a few JIRAs opened related to schema change failure caused by empty batch. This JIRA is opened as an umbrella for all those related JIRAS ( such as DRILL-4686, DRILL-4734, DR... |
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[DRILL-5768] Drill planer should not allow select * with group by clause -
Drill - [issue]
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| ...The following query should not be allowed in Drill planner.select * from cp.`tpch/nation.parquet` group by n_regionkey;+----+| * |+----+| 0 || 1 || 4 || 3 || 2 ... |
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Disable Lilith SOCKET connection by default. -
Drill - [mail # dev]
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| ...If you run the whole unit test suite, you do not have to open Lilith at thesame time. My experience is Lilith will significantly slow down unit testsuite running, and even fail testcases, as... |
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Best way to partition the data -
Drill - [mail # user]
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| ...If you have small cardinality for partitioning column, yet still end upwith 50k different small files, it's possible that you have many parallelwriter minor-fragment (threads). By defa... |
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Working on upgrade Drill Calcite version -
Drill - [mail # dev]
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| ...It's great to hear that someone is working on moving Drill on new Calciterelease! As someone who did similar job in last two rebase work, I couldsee that there would be many regressions to f... |
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