fix(duckdb): create a single table from Python data object

closes #11709

Author: mesejo

ibis/backends/duckdb/__init__.py

@@ -180,9 +180,11 @@ def create_table(
             catalog = "temp"
             database = "main"
 
+        in_memory = False
         if obj is not None:
             if not isinstance(obj, ir.Expr):
                 table = ibis.memtable(obj)
+                in_memory = True
             else:
                 table = obj
 
@@ -233,6 +235,13 @@ def create_table(
                 ).sql(dialect)
                 cur.execute(insert_stmt).fetchall()
 
+                if in_memory:
+                    cur.execute(
+                        sge.Drop(kind="VIEW", this=table.get_name(), exists=True).sql(
+                            dialect
+                        )
+                    )
+
             if overwrite:
                 cur.execute(
                     sge.Drop(kind="TABLE", this=final_table, exists=True).sql(dialect)

ibis/backends/duckdb/tests/test_client.py

@@ -468,6 +468,18 @@ def test_create_temp_table_in_nondefault_schema():
     con.con.execute(f"USE {database}")
     con.create_table("foo", {"id": [1, 2, 3]}, temp=True)
 
+    assert not con.list_tables(database=database) and not con.list_tables()
+    assert con.list_tables(database="main") == ["foo"]
+
+
+@pytest.mark.parametrize("temp", [False, True])
+def test_create_table_from_data(temp):
+    con = ibis.duckdb.connect()
+    con.create_table("foo", pd.DataFrame({"id": [1, 2, 3]}), temp=temp)
+
+    assert con.list_tables() == ["foo"]
+    assert con.con.execute("SHOW TABLES").fetchall() == [("foo",)]
+
 
 def test_create_table_with_quoted_columns():
     con = ibis.duckdb.connect()
@@ -476,6 +488,7 @@ def test_create_table_with_quoted_columns():
         {"group": ["G1"], "value": ["E1"], "id": [1], "date": [datetime(2025, 5, 13)]}
     )
     con.create_table(name, df, temp=True)
+    assert con.list_tables() == [name]
 
 
 def test_create_table_with_out_of_order_columns(con):