feat: Use DuckDB for examples data in Docker development environment (#34831)

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Beto Dealmeida <roberto@dealmeida.net>

superset/db_engine_specs/duckdb.py

@@ -33,7 +33,7 @@ from sqlalchemy.engine.url import URL
 
 from superset.constants import TimeGrain
 from superset.databases.utils import make_url_safe
-from superset.db_engine_specs.base import BaseEngineSpec
+from superset.db_engine_specs.base import BaseEngineSpec, LimitMethod
 from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
 from superset.utils.core import GenericDataType, get_user_agent, QuerySource
 
@@ -261,6 +261,39 @@ class DuckDBEngineSpec(DuckDBParametersMixin, BaseEngineSpec):
             return f"""'{dttm.isoformat(sep=" ", timespec="microseconds")}'"""
         return None
 
+    @classmethod
+    def fetch_data(cls, cursor: Any, limit: int | None = None) -> list[tuple[Any, ...]]:
+        """
+        Override fetch_data to work around duckdb-engine cursor.description bug.
+
+        The duckdb-engine SQLAlchemy driver has a bug where cursor.description
+        becomes None after calling fetchall(), even though the native DuckDB cursor
+        preserves this information correctly.
+
+        See: https://github.com/Mause/duckdb_engine/issues/1322
+
+        This method captures the cursor description before fetchall() and restores
+        it afterward to prevent downstream processing failures.
+        """
+        # Capture description BEFORE fetchall() invalidates it
+        description = cursor.description
+
+        # Execute fetchall() (which will clear cursor.description in duckdb-engine)
+        if cls.arraysize:
+            cursor.arraysize = cls.arraysize
+        try:
+            if cls.limit_method == LimitMethod.FETCH_MANY and limit:
+                data = cursor.fetchmany(limit)
+            else:
+                data = cursor.fetchall()
+        except Exception as ex:
+            raise cls.get_dbapi_mapped_exception(ex) from ex
+
+        # Restore the captured description for downstream processing
+        cursor.description = description
+
+        return data
+
     @classmethod
     def get_table_names(
         cls, database: Database, inspector: Inspector, schema: str | None