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https://issues.apache.org/jira/browse/PHOENIX-3534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16495775#comment-16495775
]
ASF GitHub Bot commented on PHOENIX-3534:
-----------------------------------------
Github user twdsilva commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/303#discussion_r191938764
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/coprocessor/MetaDataEndpointImpl.java
---
@@ -586,48 +573,336 @@ public void getTable(RpcController controller,
GetTableRequest request,
builder.setMutationTime(minNonZerodisableIndexTimestamp - 1);
}
}
-
- if (table.getTimeStamp() != tableTimeStamp) {
+ // the PTable of views and indexes on views might get updated
because a column is added to one of
+ // their parents (this won't change the timestamp)
+ if (table.getType()!=PTableType.TABLE || table.getTimeStamp()
!= tableTimeStamp) {
builder.setTable(PTableImpl.toProto(table));
}
done.run(builder.build());
- return;
} catch (Throwable t) {
logger.error("getTable failed", t);
ProtobufUtil.setControllerException(controller,
ServerUtil.createIOException(SchemaUtil.getTableName(schemaName, tableName),
t));
}
}
+ /**
+ * Used to add the columns present the ancestor hierarchy to the
PTable of the given view or
+ * view index
+ * @param table PTable of the view or view index
+ * @param skipAddingIndexes if true the returned PTable won't include
indexes
+ * @param skipAddingParentColumns if true the returned PTable won't
include columns derived from ancestor tables
+ */
+ private Pair<PTable, MetaDataProtos.MutationCode>
combineColumns(PTable table, long timestamp,
+ int clientVersion, boolean skipAddingIndexes, boolean
skipAddingParentColumns) throws SQLException, IOException {
+ boolean hasIndexId = table.getViewIndexId() != null;
+ if (table.getType() != PTableType.VIEW && !hasIndexId) {
--- End diff --
We only need to combine columns for a VIEW or an index on a VIEW. I will
add a comment for this.
> Support multi region SYSTEM.CATALOG table
> -----------------------------------------
>
> Key: PHOENIX-3534
> URL: https://issues.apache.org/jira/browse/PHOENIX-3534
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: Thomas D'Silva
> Priority: Major
> Attachments: PHOENIX-3534-wip.patch
>
>
> Currently Phoenix requires that the SYSTEM.CATALOG table is single region
> based on the server-side row locks being held for operations that impact a
> table and all of it's views. For example, adding/removing a column from a
> base table pushes this change to all views.
> As an alternative to making the SYSTEM.CATALOG transactional (PHOENIX-2431),
> when a new table is created we can do a lazy cleanup of any rows that may be
> left over from a failed DDL call (kudos to [~lhofhansl] for coming up with
> this idea). To implement this efficiently, we'd need to also do PHOENIX-2051
> so that we can efficiently find derived views.
> The implementation would rely on an optimistic concurrency model based on
> checking our sequence numbers for each table/view before/after updating. Each
> table/view row would be individually locked for their change (metadata for a
> view or table cannot span regions due to our split policy), with the sequence
> number being incremented under lock and then returned to the client.
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