haizhou-zhao commented on code in PR #6621:
URL: https://github.com/apache/iceberg/pull/6621#discussion_r1084710334
##########
hive-metastore/src/main/java/org/apache/iceberg/hive/HiveTableOperations.java:
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@@ -494,6 +494,17 @@ private void setHmsTableParameters(
// remove any props from HMS that are no longer present in Iceberg table
props
obsoleteProps.forEach(parameters::remove);
+ // altering owner
+ if (metadata.properties().get(HiveCatalog.HMS_TABLE_OWNER) != null) {
+ tbl.setOwner(metadata.properties().get(HiveCatalog.HMS_TABLE_OWNER));
+ }
+
+ // dropping owner: instead of leaving the owner blank/null, the owner will
be
+ // default to whoever is making the current drop operation
+ if (obsoleteProps.contains(HiveCatalog.HMS_TABLE_OWNER)) {
Review Comment:
@gaborkaszab @szehon-ho I realized something: if we created table without
explicitly specifying an owner (relying on default owner), then we won't be
able to drop the table owner (flip from the default owner/current user to
null). Reason is when creating a table without owner specified, the owner
property is not tracked by Iceberg Metadata file (even though there is an owner
- the default owner). The later drop will just be a noop instead of setting
owner to null since it cannot detect this owner property disappeared.
So I guess we have two way forward:
1. We can totally ignore drop owner, so dropping owner of all table becomes
a noop
2. We can force creating table to always write the owner name to Iceberg
Metadata file, whether with owner specified or not (when not specified then the
default owner)
In anyway, the current implementation even after switched to set null is
wrong, it causes inconsistent behavior:
1. When invoking drop owner on a table created with owner specified, it will
set null
2. When invoking drop owner on a table created without owner specified, it
will be a noop
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