diff --git a/source/libs/function/inc/builtinsimpl.h b/source/libs/function/inc/builtinsimpl.h
index 37f469f6448a64fc6a3768ae7757b96eed823611..cac86be91752575feba4dcb016eddd84564389d1 100644
--- a/source/libs/function/inc/builtinsimpl.h
+++ b/source/libs/function/inc/builtinsimpl.h
@@ -84,9 +84,9 @@ int32_t diffFunction(SqlFunctionCtx *pCtx);
 
 bool getFirstLastFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
 int32_t firstFunction(SqlFunctionCtx *pCtx);
-int32_t firstCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx);
 int32_t lastFunction(SqlFunctionCtx *pCtx);
-int32_t firstlastFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
+int32_t firstLastFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
+int32_t firstCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx);
 int32_t lastCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx);
 
 bool getTopBotFuncEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* pEnv);
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 39ba731784b8eb04606d4a8e9373e0ddcca1545d..c33d4b9b400fad73c2e6e7de81fc2151a8c689e0 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -1073,7 +1073,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getFirstLastFuncEnv,
     .initFunc     = functionSetup,
     .processFunc  = firstFunction,
-    .finalizeFunc = firstlastFinalize,
+    .finalizeFunc = firstLastFinalize,
     .combineFunc = firstCombine,
   },
   {
@@ -1084,7 +1084,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getFirstLastFuncEnv,
     .initFunc     = functionSetup,
     .processFunc  = lastFunction,
-    .finalizeFunc = firstlastFinalize,
+    .finalizeFunc = firstLastFinalize,
     .combineFunc  = lastCombine,
   },
   {
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 9a9e0776ce71b236ef3abe4b1fbeb69815d57904..3b453a8b1f19f5ab02e5f20489cf2281db9ec44b 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2227,7 +2227,7 @@ int32_t lastFunction(SqlFunctionCtx* pCtx) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t firstlastFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
+int32_t firstLastFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   int32_t          slotId = pCtx->pExpr->base.resSchema.slotId;
   SColumnInfoData* pCol = taosArrayGet(pBlock->pDataBlock, slotId);