separate connection for testsql

app.py

@@ -88,15 +88,17 @@ eg\n select * from schema.table limit 20\n\n"""
   return sql, disclaimerOutputStripping
 
 def testSQL(sql):
-  global dbEngine, queryHelper
+  global dbCreds, queryHelper
+  dbEngine2 = DbEngine(dbCreds)
 
   sql, disclaimerOutputStripping = preProcessSQL(sql=sql)
   if not isDataQuery(sql):
     return "Sorry not allowed to run. As the query modifies the data."
   try:
-    dbEngine.connect()
-    conn = dbEngine.getConnection()
+    dbEngine2.connect()
+    conn = dbEngine2.getConnection()
     df = pd.read_sql_query(sql, con=conn)       
+    dbEngine2.disconnect()
     return disclaimerOutputStripping + str(pd.DataFrame(df))
   except Exception as e:
       errorMessage = {"function":"testSQL","error":str(e), "userInput":sql}
@@ -106,6 +108,7 @@ def testSQL(sql):
       # modifiedSql = queryHelper.modifySqlQueryEnteredByUser(prompt)
       # logMessage = {"function":"queryHelper.modifySqlQueryEnteredByUser", "sqlQuery":sql, "modifiedSQLQuery":modifiedSql}
       # saveLog(logMessage, 'info')
+      dbEngine2.disconnect()
       return f"The query you entered throws some error. Here is the error. Please try different query\n {str(e)}"