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https://issues.apache.org/jira/browse/HIVE-13112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15458509#comment-15458509
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Vimal Sharma commented on HIVE-13112:
-------------------------------------
I am using Hive version 2.1.0 and trying to get Column level lineage. However,
when I try to access the Dependency value in LineageInfo, it is coming as null.
Sample Code:
{code}
public static Map<ColumnName, List<HiveColumnLineageInfo>>
buildLineageMap(LineageInfo lInfo) {
for(Map.Entry<LineageInfo.DependencyKey, LineageInfo.Dependency> e :
lInfo.entrySet()) {
System.out.println("Col Lineage Key : " + e.getKey());
System.out.println("Col Lineage Value: " + e.getValue());
{code}
In the output, Key is set to destination column in a lineage but the Value
which should contain origin column information is null. How can I verify
whether the lineage information being set correctly in Hive Sessionstate.
> Expose Lineage information in case of CTAS
> ------------------------------------------
>
> Key: HIVE-13112
> URL: https://issues.apache.org/jira/browse/HIVE-13112
> Project: Hive
> Issue Type: Bug
> Components: lineage
> Reporter: Harish Butani
> Assignee: Harish Butani
> Fix For: 2.1.0
>
> Attachments: HIVE-13112.01.patch
>
>
> This is not happening because Lineage is being exposed by MoveTask which
> checks for a LoadTableDesc. In case of CTAS the table is created after the
> MoveTask.
> Proposed solution is to add a flag to CreateTableDesc to track a CTAS
> operation, and have the DDLTask expose the lineage if this flag is set.
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