disable calcite

Author: Devjiu

python/pyhdk/hdk.py

@@ -10,8 +10,9 @@
     ArrowStorage,
     DataMgr,
     SchemaMgr,
+    # MemoryLevel,
 )
-from pyhdk._sql import Calcite, RelAlgExecutor, ExecutionResult
+from pyhdk._sql import RelAlgExecutor, ExecutionResult
 from pyhdk._execute import Executor, ResultSetRegistry
 from pyhdk._builder import QueryBuilder, QueryExpr, QueryNode
 
@@ -2076,7 +2077,7 @@ def __init__(self, **kwargs):
         self._schema_mgr = SchemaMgr()
         self._schema_mgr.registerProvider(self._storage)
         self._schema_mgr.registerProvider(rs_registry)
-        self._calcite = Calcite(self._schema_mgr, self._config)
+        # self._calcite = Calcite(self._schema_mgr, self._config)
         self._executor = Executor(self._data_mgr, self._config)
         self._builder = QueryBuilder(self._schema_mgr, self._config, self)
 
@@ -2870,6 +2871,9 @@ def if_then_else(self, cond, true_val, false_val):
         """
         return self._builder.if_then_else(cond, true_val, false_val)
 
+    def clear_cache(self):
+        self._executor.clearMemory(self._data_mgr, 1)
+
 
 def init(**kwargs):
     if init._instance is None: