autophagy commented on code in PR #26121:
URL: https://github.com/apache/flink/pull/26121#discussion_r1959749951
##########
flink-python/pyflink/table/catalog.py:
##########
@@ -1391,3 +1398,418 @@ def of(catalog_name: str, configuration: Configuration,
comment: str = None):
j_catalog_descriptor =
gateway.jvm.org.apache.flink.table.catalog.CatalogDescriptor.of(
catalog_name, configuration._j_configuration, comment)
return CatalogDescriptor(j_catalog_descriptor)
+
+
+class Column(metaclass=ABCMeta):
Review Comment:
In Python, the `metaclass` argument defines how the underlying class should
be created. In this case we're using `ABCMeta` from the [Abstract Base Classes
](https://docs.python.org/3/library/abc.html) module, which in this context is
used to enforce abstract method implementation in subclasses and prevent
instantiation of the abstract class `Column` (trying to instantiate it with
`Column()` will return an error like `TypeError: Can't instantiate abstract
class Column without an implementation for abstract method 'with_comment'`,
etc). It's similar to defining a `abstract class` in Java.
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