bkietz commented on code in PR #39019:
URL: https://github.com/apache/arrow/pull/39019#discussion_r1428033919
##########
dev/archery/archery/integration/datagen.py:
##########
@@ -927,6 +927,85 @@ class LargeListColumn(_BaseListColumn, _LargeOffsetsMixin):
pass
+class ListViewField(Field):
+
+ def __init__(self, name, value_field, *, nullable=True,
+ metadata=None):
+ super().__init__(name, nullable=nullable,
+ metadata=metadata)
+ self.value_field = value_field
+
+ @property
+ def column_class(self):
+ return ListViewColumn
+
+ def _get_type(self):
+ return OrderedDict([
+ ('name', 'listview')
+ ])
+
+ def _get_children(self):
+ return [self.value_field.get_json()]
+
+ def generate_column(self, size, name=None):
+ MAX_LIST_SIZE = 4
+
+ is_valid = self._make_is_valid(size)
+ offsets = []
+ sizes = np.random.randint(0, MAX_LIST_SIZE + 1, size=size)
+ offset = 0
+ for s in sizes:
+ offsets.append(offset)
+ offset += int(s)
Review Comment:
https://github.com/apache/arrow/pull/39019/commits/03a12f9cf50dbb92184afd815a73454b138ce713
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