manuzhang commented on code in PR #15814:
URL: https://github.com/apache/iceberg/pull/15814#discussion_r3056024752
##########
docs/docs/flink-ddl.md:
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@@ -45,6 +45,23 @@ The following properties can be set if using the Hive
catalog:
* `hive-conf-dir`: Path to a directory containing a `hive-site.xml`
configuration file which will be used to provide custom Hive configuration
values. The value of `hive.metastore.warehouse.dir` from
`<hive-conf-dir>/hive-site.xml` (or hive configure file from classpath) will be
overwritten with the `warehouse` value if setting both `hive-conf-dir` and
`warehouse` when creating iceberg catalog.
* `hadoop-conf-dir`: Path to a directory containing `core-site.xml` and
`hdfs-site.xml` configuration files which will be used to provide custom Hadoop
configuration values.
+!!! warning "Hive Catalog Limitation"
+ The Hive Metastore validates schema changes by comparing column types
**positionally**
+ (`hive.metastore.disallow.incompatible.col.type.changes`, default `true`).
When using a Hive catalog,
+ schema evolution operations that change column positions — such as
dropping a non-last column or
+ reordering columns — may fail regardless of which engine performs the
change (Spark, Flink Java API, etc.).
+
+ To work around this, disable the Hive Metastore (HMS) schema compatibility
check by setting
Review Comment:
```suggestion
To work around this, disable the HMS schema compatibility check by
setting
```
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