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https://issues.apache.org/jira/browse/HIVE-12839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15135471#comment-15135471
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Pengcheng Xiong commented on HIVE-12839:
----------------------------------------
[~ashutoshc], sure. The major change is in the HiveRelFieldTrimmer. I added a
new function
{code}
public TrimResult trimFields(
183 HiveSortLimit sort,
184 ImmutableBitSet fieldsUsed,
185 Set<RelDataTypeField> extraFields) {
{code}
which was copied and pasted from Calcite. It calls a function
{code}
sortLimit(cluster, relBuilder, offset, fetch, fields);
{code}
And inside sortLimit, I removed the line
{code}
return empty LogicalValues when offset == 0 && fetch == 0.
{code}
Thus, it will fall back to the processing logic in Calcite 1.5. I also added
some "TODO" in the comments. Thanks.
> Upgrade Hive to Calcite 1.6
> ---------------------------
>
> Key: HIVE-12839
> URL: https://issues.apache.org/jira/browse/HIVE-12839
> Project: Hive
> Issue Type: Improvement
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-12839.01.patch, HIVE-12839.02.patch,
> HIVE-12839.03.patch, HIVE-12839.04.patch
>
>
> CLEAR LIBRARY CACHE
> Upgrade Hive to Calcite 1.6.0-incubating.
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