feat: add unordered sql compilation

bigframes/core/__init__.py

@@ -100,7 +100,7 @@ def _compile_unordered(self) -> compiled.UnorderedIR:
     def shape(self) -> typing.Tuple[int, int]:
         """Returns dimensions as (length, width) tuple."""
         width = len(self._compile().columns)
-        count_expr = self._compile()._to_ibis_expr(ordering_mode="unordered").count()
+        count_expr = self._compile_unordered()._to_ibis_expr().count()
 
         # Support in-memory engines for hermetic unit tests.
         if not self.node.session:
@@ -161,13 +161,10 @@ def start_query(
 
     def cached(self, cluster_cols: typing.Sequence[str]) -> ArrayValue:
         """Write the ArrayValue to a session table and create a new block object that references it."""
-        compiled = self._compile()
-        ibis_expr = compiled._to_ibis_expr(
+        compiled_value = self._compile()
+        ibis_expr = compiled_value._to_ibis_expr(
             ordering_mode="unordered", expose_hidden_cols=True
         )
-        destination = self.session._ibis_to_session_table(
-            ibis_expr, cluster_cols=cluster_cols, api_name="cache"
-        )
         tmp_table = self.session._ibis_to_session_table(
             ibis_expr, cluster_cols=cluster_cols, api_name="cached"
         )

bigframes/core/compile/__init__.py

@@ -12,10 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from bigframes.core.compile.compiled import CompiledArrayValue
-from bigframes.core.compile.compiler import compile_ordered
+from bigframes.core.compile.compiled import OrderedIR, UnorderedIR
+from bigframes.core.compile.compiler import compile_ordered, compile_unordered
 
 __all__ = [
     "compile_ordered",
-    "CompiledArrayValue",
+    "compile_unordered",
+    "OrderedIR",
+    "UnorderedIR",
 ]