fix(duckdb): clean up temp view junk when using memtables in `create_…

…table` (#9107)

QoL improvement for loading from in-memory data: no more temporary view
junk.

docs/tutorials/getting_started.qmd

@@ -30,7 +30,6 @@ con.create_table(
 You can now see the example dataset copied over to the database:
 
 ```{python}
-con = ibis.connect("duckdb://penguins.ddb")
 con.list_tables()
 ```
 

ibis/backends/duckdb/__init__.py

@@ -169,9 +169,12 @@ def create_table(
  if temp:
  properties.append(sge.TemporaryProperty())
 
+ temp_memtable_view = None
+
  if obj is not None:
  if not isinstance(obj, ir.Expr):
  table = ibis.memtable(obj)
+ temp_memtable_view = table.op().name
  else:
  table = obj
 
@@ -248,6 +251,9 @@ def create_table(
  ).sql(self.name)
  )
 
+ if temp_memtable_view is not None:
+ self.con.unregister(temp_memtable_view)
+
  return self.table(name, database=database)
 
  def _load_into_cache(self, name, expr):