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https://issues.apache.org/jira/browse/PHOENIX-3744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035742#comment-16035742
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Hudson commented on PHOENIX-3744:
---------------------------------
FAILURE: Integrated in Jenkins build Phoenix-master #1640 (See
[https://builds.apache.org/job/Phoenix-master/1640/])
PHOENIX-3744 Support snapshot scanners for MR-based Non-aggregate (jamestaylor:
rev faadb544857845d9520e34359c6db341ade1fe02)
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/iterate/BaseResultIterators.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/iterate/MapReduceParallelScanGrouper.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/coprocessor/BaseScannerRegionObserver.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/mapreduce/util/PhoenixConfigurationUtil.java
* (add)
phoenix-core/src/main/java/org/apache/phoenix/iterate/TableSnapshotResultIterator.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/coprocessor/ScanRegionObserver.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/iterate/ParallelScanGrouper.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/mapreduce/PhoenixRecordReader.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/iterate/DefaultParallelScanGrouper.java
* (add)
phoenix-core/src/main/java/org/apache/phoenix/iterate/SnapshotScanner.java
* (edit)
phoenix-core/src/main/java/org/apache/phoenix/mapreduce/util/PhoenixMapReduceUtil.java
* (add)
phoenix-core/src/main/java/org/apache/phoenix/iterate/RegionScannerFactory.java
* (add)
phoenix-core/src/it/java/org/apache/phoenix/end2end/TableSnapshotReadsMapReduceIT.java
* (add)
phoenix-core/src/main/java/org/apache/phoenix/iterate/NonAggregateRegionScannerFactory.java
* (edit) phoenix-core/src/main/java/org/apache/phoenix/util/IndexUtil.java
> Support snapshot scanners for MR-based queries
> ----------------------------------------------
>
> Key: PHOENIX-3744
> URL: https://issues.apache.org/jira/browse/PHOENIX-3744
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: Akshita Malhotra
> Attachments: PHOENIX-3744.patch, PHOENIX-3744.patch,
> PHOENIX-3744.patch
>
>
> HBase support scanning over snapshots, with a SnapshotScanner that accesses
> the region directly in HDFS. We should make sure that Phoenix can support
> that.
> Not sure how we'd want to decide when to run a query over a snapshot. Some
> ideas:
> - if there's an SCN set (i.e. the query is running at a point in time in the
> past)
> - if the memstore is empty
> - if the query is being run at a timestamp earlier than any memstore data
> - as a config option on the table
> - as a query hint
> - based on some kind of optimizer rule (i.e. based on estimated # of bytes
> that will be scanned)
> Phoenix typically runs a query at the timestamp at which it was compiled. Any
> data committed after this time should not be seen while a query is running.
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