From a4d86275d2ec7560ec29253786b9a814b4758d83 Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Mon, 18 Jul 2022 15:06:21 +0800
Subject: [PATCH] feat(query): add first/last/last_row scalar version

---
 include/libs/scalar/scalar.h        | 1 +
 source/libs/function/src/builtins.c | 3 +++
 source/libs/scalar/src/sclfunc.c    | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/include/libs/scalar/scalar.h b/include/libs/scalar/scalar.h
index b667207684..5ab01159cf 100644
--- a/include/libs/scalar/scalar.h
+++ b/include/libs/scalar/scalar.h
@@ -119,6 +119,7 @@ int32_t stateDurationScalarFunction(SScalarParam *pInput, int32_t inputNum, SSca
 int32_t histogramScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t topScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 int32_t bottomScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
+int32_t firstLastScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index b6a351b4a6..c1741fe879 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -2231,6 +2231,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getFirstLastFuncEnv,
     .initFunc     = functionSetup,
     .processFunc  = lastRowFunction,
+    .sprocessFunc = firstLastScalarFunction,
     .finalizeFunc = firstLastFinalize
   },
   {
@@ -2251,6 +2252,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getFirstLastFuncEnv,
     .initFunc     = functionSetup,
     .processFunc  = firstFunction,
+    .sprocessFunc = firstLastScalarFunction,
     .finalizeFunc = firstLastFinalize,
     .pPartialFunc = "_first_partial",
     .pMergeFunc   = "_first_merge",
@@ -2286,6 +2288,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .getEnvFunc   = getFirstLastFuncEnv,
     .initFunc     = functionSetup,
     .processFunc  = lastFunction,
+    .sprocessFunc = firstLastScalarFunction,
     .finalizeFunc = firstLastFinalize,
     .pPartialFunc = "_last_partial",
     .pMergeFunc   = "_last_merge",
diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index 1cbaf9690e..cca1528800 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -2845,3 +2845,7 @@ int32_t topScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *
 int32_t bottomScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
   return selectScalarFunction(pInput, inputNum, pOutput);
 }
+
+int32_t firstLastScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
+  return selectScalarFunction(pInput, inputNum, pOutput);
+}