diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 673ba2a6f5fe7b8caddcb62143cab447b971beb0..f536d8d65bad0d5e0e45938ee1dc3a4e1e430b9f 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -112,7 +112,7 @@ int32_t tsMaxShellConns = 5000;
 char    tsDefaultDB[TSDB_DB_NAME_LEN] = {0};
 char    tsDefaultUser[64] = "root";
 char    tsDefaultPass[64] = "taosdata";
-int32_t tsMaxConnections = 50;
+int32_t tsMaxConnections = 5000;
 
 int32_t tsBalanceInterval = 300;  // seconds
 int32_t tsOfflineThreshold = 86400*100;   // seconds 10days
@@ -840,7 +840,7 @@ static void doInitGlobalConfig() {
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
   cfg.minValue = 1;
-  cfg.maxValue = 100;
+  cfg.maxValue = 100000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
diff --git a/src/connector/python/linux/python3/taos/cinterface.py b/src/connector/python/linux/python3/taos/cinterface.py
index 87540bf32602aa8cde98108c04fc159ad14c098b..be0226447d9b99451842d16b796fcbfbee7ccba6 100644
--- a/src/connector/python/linux/python3/taos/cinterface.py
+++ b/src/connector/python/linux/python3/taos/cinterface.py
@@ -150,6 +150,7 @@ class CTaosInterface(object):
     libtaos.taos_fetch_lengths.restype = ctypes.c_void_p
     libtaos.taos_free_result.restype = None
     libtaos.taos_errno.restype = ctypes.c_int
+    libtaos.taos_query.restype = ctypes.POINTER(ctypes.c_void_p)
 
     def __init__(self, config=None):
         '''