[TD-1459] <fix>: fix compile error for release build type.

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")

src/client/src/tscSQLParser.c

@@ -5271,6 +5271,7 @@ static void doUpdateSqlFunctionForColPrj(SQueryInfo* pQueryInfo) {
       }
 
       assert(qualifiedCol);
+      qualifiedCol = qualifiedCol;
     }
   }
 }

src/client/src/tscUtil.c

@@ -1788,6 +1788,7 @@ static void doSetSqlExprAndResultFieldInfo(SQueryInfo* pQueryInfo, SQueryInfo* p
     }
 
     assert(matched);
+    matched = matched;
   }
 
   tscFieldInfoUpdateOffset(pNewQueryInfo);

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) {