Zoltan Haindrich created HIVE-24830:
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Summary: Revise RowSchema mutability usage
Key: HIVE-24830
URL: https://issues.apache.org/jira/browse/HIVE-24830
Project: Hive
Issue Type: Bug
Reporter: Zoltan Haindrich
Assignee: Zoltan Haindrich
RowSchema is essentially a container class for a list of fields.
* it can be constructed from a "list"
* the list can be set
* the list can be accessed
none of the above methods try to protect the data inside; hence the following
could easily happen:
{code}
s=o1.getSchema();
col=s.getCol("favourite")
col.setInternalName("asd"); // will modify o1 schema
newSchema.add(col);
o2.setSchema(newSchema);
o2.getSchema().get("asd").setInternalName("xxx"); // will modify o1 and o2
schema
[...]
{code}
not sure how much of this is actually cruical; exploratory testrun revealed
some cases
https://github.com/apache/hive/pull/2019
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