[
https://issues.apache.org/jira/browse/PHOENIX-3744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035636#comment-16035636
]
James Taylor edited comment on PHOENIX-3744 at 6/2/17 11:52 PM:
----------------------------------------------------------------
Would you mind attaching a patch that applies to 4.x-HBase-0.98 branch,
[~akshita.malhotra]?
Also, for 4.x-HBase-1.1 branch, I get the following compilation error. Would
you mind attaching a patch that'll work for that branch?
{code}
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on
project phoenix-core: Compilation failure: Compilation failure:
[ERROR]
/home/jtaylor/dev/apache/phoenix/phoenix-core/src/main/java/org/apache/phoenix/iterate/TableSnapshotResultIterator.java:[60,53]
incompatible types
[ERROR] required:
org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.RestoreMetaChanges
[ERROR] found: void
[ERROR]
/home/jtaylor/dev/apache/phoenix/phoenix-core/src/main/java/org/apache/phoenix/iterate/TableSnapshotResultIterator.java:[63,20]
cannot find symbol
[ERROR] symbol: method getTableDescriptor()
[ERROR] location: variable meta of type
org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.RestoreMetaChanges
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :phoenix-core
{code}
FYI, looks fine on master and 4.x-HBase-1.2 branches, so I've committed it
there.
was (Author: jamestaylor):
Would you mind attaching a patch that applies to 4.x-HBase-0.98 branch,
[~akshita.malhotra]?
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
