enh crash_gen for 3.0 about [stream processing] , [data subscription] ,[delete data]

tests/pytest/crash_gen.sh

@@ -45,7 +45,7 @@ fi
 
 # Now getting ready to execute Python
 # The following is the default of our standard dev env (Ubuntu 20.04), modify/adjust at your own risk
-PYTHON_EXEC=python3.8
+PYTHON_EXEC=python3
 
 # First we need to set up a path for Python to find our own TAOS modules, so that "import" can work.
 # export PYTHONPATH=$(pwd)/../../src/connector/python:$(pwd)

tests/pytest/crash_gen/shared/db.py

@@ -26,9 +26,12 @@ class DbConn:
     TYPE_NATIVE = "native-c"
     TYPE_REST =   "rest-api"
     TYPE_INVALID = "invalid"
+    
+
 
     # class variables
     lastSqlFromThreads : dict[int, str] = {} # stored by thread id, obtained from threading.current_thread().ident%10000
+    spendThreads : dict[int, float] = {} # stored by thread id, obtained from threading.current_thread().ident%10000
 
     @classmethod
     def saveSqlForCurrentThread(cls, sql: str):
@@ -37,15 +40,36 @@ class DbConn:
         run into a dead-lock situation, we can pick out the deadlocked thread, and use 
         that information to find what what SQL statement is stuck.
         '''
+        
         th = threading.current_thread()        
         shortTid = th.native_id % 10000 #type: ignore
         cls.lastSqlFromThreads[shortTid] = sql # Save this for later
 
     @classmethod
-    def fetchSqlForThread(cls, shortTid : int) -> str :        
+    def fetchSqlForThread(cls, shortTid : int) -> str : 
+
+        print("=======================")
         if shortTid not in cls.lastSqlFromThreads:
             raise CrashGenError("No last-attempted-SQL found for thread id: {}".format(shortTid))
-        return cls.lastSqlFromThreads[shortTid]
+        return cls.lastSqlFromThreads[shortTid] 
+
+ 
+    @classmethod
+    def sql_exec_spend(cls, cost: float):
+        '''
+        Let us save the last SQL statement on a per-thread basis, so that when later we 
+        run into a dead-lock situation, we can pick out the deadlocked thread, and use 
+        that information to find what what SQL statement is stuck.
+        '''
+        th = threading.current_thread()        
+        shortTid = th.native_id % 10000 #type: ignore
+        cls.spendThreads[shortTid] = cost # Save this for later
+
+    @classmethod
+    def get_time_cost(cls) ->float:
+        th = threading.current_thread()        
+        shortTid = th.native_id % 10000 #type: ignore
+        return cls.spendThreads.get(shortTid)
 
     @classmethod
     def create(cls, connType, dbTarget):
@@ -61,6 +85,7 @@ class DbConn:
     def createNative(cls, dbTarget) -> DbConn:
         return cls.create(cls.TYPE_NATIVE, dbTarget)
 
+
     @classmethod
     def createRest(cls, dbTarget) -> DbConn:
         return cls.create(cls.TYPE_REST, dbTarget)
@@ -75,6 +100,7 @@ class DbConn:
         return "[DbConn: type={}, target={}]".format(self._type, self._dbTarget)
 
     def getLastSql(self):
+        
         return self._lastSql
 
     def open(self):
@@ -184,13 +210,19 @@ class DbConnRest(DbConn):
     def _doSql(self, sql):
         self._lastSql = sql # remember this, last SQL attempted
         self.saveSqlForCurrentThread(sql) # Save in global structure too. #TODO: combine with above
-        try:
+        time_cost = -1
+        time_start = time.time()
+        try:   
             r = requests.post(self._url, 
                 data = sql,
-                auth = HTTPBasicAuth('root', 'taosdata'))         
+                auth = HTTPBasicAuth('root', 'taosdata'))    
         except:
             print("REST API Failure (TODO: more info here)")
+            self.sql_exec_spend(-2)
             raise
+        finally:
+            time_cost = time.time()- time_start 
+            self.sql_exec_spend(time_cost)
         rj = r.json()
         # Sanity check for the "Json Result"
         if ('status' not in rj):
@@ -223,6 +255,8 @@ class DbConnRest(DbConn):
             "[SQL-REST] Execution Result, nRows = {}, SQL = {}".format(nRows, sql))
         return nRows
 
+    
+
     def query(self, sql):  # return rows affected
         return self.execute(sql)
 
@@ -336,6 +370,7 @@ class MyTDSql:
             raise
         return self.affectedRows
 
+
 class DbTarget:
     def __init__(self, cfgPath, hostAddr, port):
         self.cfgPath  = cfgPath
@@ -355,6 +390,7 @@ class DbConnNative(DbConn):
     # _connInfoDisplayed = False # TODO: find another way to display this
     totalConnections = 0 # Not private
     totalRequests = 0 
+    time_cost = -1
 
     def __init__(self, dbTarget):
         super().__init__(dbTarget)
@@ -413,8 +449,19 @@ class DbConnNative(DbConn):
                 "Cannot exec SQL unless db connection is open", CrashGenError.DB_CONNECTION_NOT_OPEN)
         Logging.debug("[SQL] Executing SQL: {}".format(sql))
         self._lastSql = sql
+        time_cost = -1
+        nRows = 0
+        time_start = time.time()
         self.saveSqlForCurrentThread(sql) # Save in global structure too. #TODO: combine with above
-        nRows = self._tdSql.execute(sql)
+        try:
+            nRows= self._tdSql.execute(sql)
+        except Exception as e:
+            self.sql_exec_spend(-2)
+        finally:
+            time_cost =  time.time() - time_start
+            self.sql_exec_spend(time_cost)
+
+        
         cls = self.__class__
         cls.totalRequests += 1
         Logging.debug(
@@ -494,4 +541,3 @@ class DbManager():
             self._dbConn.close()
             self._dbConn = None
             Logging.debug("DbManager closed DB connection...")
-