fix(duckdb): always create temp tables in temp.main (#11092)

Co-authored-by: Phillip Cloud <[email protected]>

Author: NickCrews

ibis/backends/duckdb/__init__.py

@@ -155,6 +155,7 @@ def create_table(
         if temp:
             properties.append(sge.TemporaryProperty())
             catalog = "temp"
+            database = "main"
 
         if obj is not None:
             if not isinstance(obj, ir.Expr):

ibis/backends/duckdb/tests/test_client.py

@@ -465,3 +465,11 @@ def test_create_table_with_nulls(con, kwargs):
 
     with pytest.raises(com.IbisTypeError, match="NULL typed columns"):
         con.create_table(name, **kwargs)
+
+
+def test_create_temp_table_in_nondefault_schema():
+    con = ibis.duckdb.connect()
+    database = gen_name("nondefault_schema")
+    con.create_database(database)
+    con.con.execute(f"USE {database}")
+    con.create_table("foo", {"id": [1, 2, 3]}, temp=True)