diff --git a/cmake/define.inc b/cmake/define.inc
index 28770be2545ed007320e2de6385de0783c3138ba..84df6f54055cff0b6fe7f1820d46958787ca3c46 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -100,7 +100,7 @@ IF (TD_LINUX)
   ENDIF ()
   
   SET(DEBUG_FLAGS "-O0 -DDEBUG")
-  SET(RELEASE_FLAGS "-O0")
+  SET(RELEASE_FLAGS "-O0 -Wno-unused-variable -Wunused-but-set-variable")
   
   IF (${COVER} MATCHES "true")
     MESSAGE(STATUS "Test coverage mode, add extra flags")
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index c248b08dddcfdfe2aaae406ea75e38720d7bbeea..f9f72f9174549818cf229e48cc4226ebb3410d00 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -5271,6 +5271,7 @@ static void doUpdateSqlFunctionForColPrj(SQueryInfo* pQueryInfo) {
       }
 
       assert(qualifiedCol);
+      qualifiedCol = qualifiedCol;
     }
   }
 }
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 80e3828c9d70bb70e89dfd43fa6cd32610b0c4cb..636fccd3a0860a85629dbf36282fd02c224ecfef 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1788,6 +1788,7 @@ static void doSetSqlExprAndResultFieldInfo(SQueryInfo* pQueryInfo, SQueryInfo* p
     }
 
     assert(matched);
+    matched = matched;
   }
 
   tscFieldInfoUpdateOffset(pNewQueryInfo);
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index d48d7d5ea104d98ee0877d9a411d6919023e4f3a..ed093e4143b4b7f1060759191013a2ca5be8402e 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -5463,6 +5463,7 @@ static int32_t getColumnIndexInSource(SQueryTableMsg *pQueryMsg, SSqlFuncMsg *pE
     }
   }
   assert(0);
+  return -1;
 }
 
 bool validateExprColumnInfo(SQueryTableMsg *pQueryMsg, SSqlFuncMsg *pExprMsg, SColumnInfo* pTagCols) {