Travis Crawford created HIVE-3279:
-------------------------------------
Summary: Table schema not being copied to Partitions with no
columns
Key: HIVE-3279
URL: https://issues.apache.org/jira/browse/HIVE-3279
Project: Hive
Issue Type: Bug
Reporter: Travis Crawford
Assignee: Travis Crawford
Hive has a feature where {{Partition}}'s without any defined columns use the
{{Table}} schema. This happens in
{{[Partition.initialize|https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/metadata/Partition.java#L167}}
{code}
// set default if columns are not set
if (tPartition.getSd().getCols() == null) {
if (table.getCols() != null) {
tPartition.getSd().setCols(table.getCols());
}
}
{code}
There's an issue though, because
{{[Table.getEmptyTable|https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/metadata/Table.java#L121]}}
initializes cols to an empty array, which of course is not null, causing the
above feature to not work as expected.
I'm not sure of the fix - is there a case where cols can indeed be null? I
think the best thing to do here is:
{code}
- if (tPartition.getSd().getCols() == null) {
+ if (tPartition.getSd().getCols() == null ||
tPartition.getSd().getCols().size() == 0) {
{code}
Thoughts?
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