From ed6eae4d5894295ecded05b828c6fd729b0a8e13 Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Thu, 26 May 2022 17:13:13 +0800
Subject: [PATCH] fix(query): fix elapsed function time_unit cannot be smaller
 than db precision

TD-16018
---
 source/libs/function/src/builtins.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 8914dca639..f5fa7b8855 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -318,6 +318,11 @@ static int32_t translateElapsed(SFunctionNode* pFunc, char* pErrBuf, int32_t len
     if (!IS_INTEGER_TYPE(paraType)) {
       return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
     }
+
+    if (pValue->datum.i == 0) {
+      return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
+                             "ELAPSED function time unit parameter should be greater than db precision");
+    }
   }
 
   pFunc->node.resType = (SDataType){.bytes = tDataTypes[TSDB_DATA_TYPE_DOUBLE].bytes, .type = TSDB_DATA_TYPE_DOUBLE};
-- 
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