added monetdb connector

reconstruct/ast.py

@@ -248,6 +248,8 @@ class create_table(ast_node):
             columns.append(f'{c.name} {c.type.upper()}')
         self.sql += ', '.join(columns)
         self.sql += ')'
+        if self.context.use_columnstore:
+            self.sql += ' engine=ColumnStore'
     
 
         

reconstruct/storage.py

@@ -77,7 +77,8 @@ class Context:
         self.cols = []
         self.datasource = None
         self.udf_map = dict()
-    
+        self.use_columnstore = False
+        
     def emit(self, sql:str):
         self.sql += sql + ' '