diff --git a/src/servers/src/http/prometheus_resp.rs b/src/servers/src/http/prometheus_resp.rs
index 94d57ed65b5e..0f9176cdf6ee 100644
--- a/src/servers/src/http/prometheus_resp.rs
+++ b/src/servers/src/http/prometheus_resp.rs
@@ -36,7 +36,7 @@ use super::header::{collect_plan_metrics, GREPTIME_DB_HEADER_METRICS};
 use super::prometheus::{
     PromData, PromQueryResult, PromSeriesMatrix, PromSeriesVector, PrometheusResponse,
 };
-use crate::error::{CollectRecordbatchSnafu, InternalSnafu, Result};
+use crate::error::{CollectRecordbatchSnafu, Result, UnexpectedResultSnafu};
 
 #[derive(Debug, Default, Serialize, Deserialize, JsonSchema, PartialEq)]
 pub struct PrometheusJsonResponse {
@@ -183,7 +183,17 @@ impl PrometheusJsonResponse {
                         timestamp_column_index = Some(i);
                     }
                 }
-                ConcreteDataType::Float64(_) => {
+                // Treat all value types as field
+                ConcreteDataType::Float32(_)
+                | ConcreteDataType::Float64(_)
+                | ConcreteDataType::Int8(_)
+                | ConcreteDataType::Int16(_)
+                | ConcreteDataType::Int32(_)
+                | ConcreteDataType::Int64(_)
+                | ConcreteDataType::UInt8(_)
+                | ConcreteDataType::UInt16(_)
+                | ConcreteDataType::UInt32(_)
+                | ConcreteDataType::UInt64(_) => {
                     if first_field_column_index.is_none() {
                         first_field_column_index = Some(i);
                     }
@@ -195,11 +205,11 @@ impl PrometheusJsonResponse {
             }
         }
 
-        let timestamp_column_index = timestamp_column_index.context(InternalSnafu {
-            err_msg: "no timestamp column found".to_string(),
+        let timestamp_column_index = timestamp_column_index.context(UnexpectedResultSnafu {
+            reason: "no timestamp column found".to_string(),
         })?;
-        let first_field_column_index = first_field_column_index.context(InternalSnafu {
-            err_msg: "no value column found".to_string(),
+        let first_field_column_index = first_field_column_index.context(UnexpectedResultSnafu {
+            reason: "no value column found".to_string(),
         })?;
 
         let metric_name = (METRIC_NAME.to_string(), metric_name);
@@ -226,8 +236,11 @@ impl PrometheusJsonResponse {
                 .as_any()
                 .downcast_ref::<TimestampMillisecondVector>()
                 .unwrap();
-            let field_column = batch
+            let casted_field_column = batch
                 .column(first_field_column_index)
+                .cast(&ConcreteDataType::float64_datatype())
+                .unwrap();
+            let field_column = casted_field_column
                 .as_any()
                 .downcast_ref::<Float64Vector>()
                 .unwrap();
diff --git a/tests-integration/tests/http.rs b/tests-integration/tests/http.rs
index bc8b458ee5d1..dfd51351fc6c 100644
--- a/tests-integration/tests/http.rs
+++ b/tests-integration/tests/http.rs
@@ -436,6 +436,12 @@ pub async fn test_prom_http_api(store_type: StorageType) {
         .send()
         .await;
     assert_eq!(res.status(), StatusCode::OK);
+    let res = client
+        .post("/v1/prometheus/api/v1/query_range?query=count(count(up))&start=1&end=100&step=5")
+        .header("Content-Type", "application/x-www-form-urlencoded")
+        .send()
+        .await;
+    assert_eq!(res.status(), StatusCode::OK);
 
     // labels
     let res = client