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https://issues.apache.org/jira/browse/TRAFODION-1423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14652463#comment-14652463
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ASF GitHub Bot commented on TRAFODION-1423:
-------------------------------------------
Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/37#discussion_r36128340
--- Diff: core/sql/optimizer/NATable.cpp ---
@@ -7596,6 +7617,19 @@ NABoolean NATable::getHbaseTableInfo(Int32&
hbtIndexLevels, Int32& hbtBlockSize
}
+NABoolean NATable::isSQLMXAlignedTable(char *objectName) const
+{
+ if (qualifiedName_.getText().compareTo(objectName, NAString::exact) == 0)
+ return getSQLMXAlignedTable();
+ else {
+ for (CollIndex i = 0; i < indexes_.entries(); i++) {
+ if
(indexes_[i]->getFileSetName().getQualifiedNameAsAnsiString().compareTo(objectName,
NAString::exact) == 0)
+ return indexes_[i]->isSqlmxAlignedRowFormat();
+ }
+ }
+ return getSQLMXAlignedTable();
--- End diff --
Should we ever get here? (If we do, is this an internal error?)
> Indexes on trafodion should be created in aligned row format by default
> -----------------------------------------------------------------------
>
> Key: TRAFODION-1423
> URL: https://issues.apache.org/jira/browse/TRAFODION-1423
> Project: Apache Trafodion
> Issue Type: Improvement
> Components: sql-cmp, sql-cmu
> Affects Versions: 2.0-incubating
> Reporter: Selvaganesan Govindarajan
> Assignee: Selvaganesan Govindarajan
>
> Currently indexes are created with the same row format as the table. However,
> indexes can be created in aligned row format independent of the table because
> the columns in the index table doesn't have any other column other than salt,
> index columns, and primary key of the table. These column values constitute
> the rowid. Index rows are always deleted and inserted and are never updated.
> Hence, it goes well to create index in aligned row format. In addition, index
> in aligned row format has the following advantages:
> - Reduced storage space for the index
> - Reduced block cache and memstore space at runtime
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