fix: correct date/time type format for postgresql

src/common/time/src/date.rs

@@ -71,6 +71,10 @@ impl Date {
     pub fn val(&self) -> i32 {
         self.0
     }
+
+    pub fn to_chrono_date(&self) -> Option<NaiveDate> {
+        NaiveDate::from_num_days_from_ce_opt(UNIX_EPOCH_FROM_CE + self.0)
+    }
 }
 
 #[cfg(test)]

src/common/time/src/datetime.rs

@@ -23,7 +23,7 @@ use crate::error::{Error, ParseDateStrSnafu, Result};
 
 const DATETIME_FORMAT: &str = "%F %T";
 
-/// [DateTime] represents the **seconds elapsed since "1970-01-01 00:00:00 UTC" (UNIX Epoch)**.  
+/// [DateTime] represents the **seconds elapsed since "1970-01-01 00:00:00 UTC" (UNIX Epoch)**.
 #[derive(
     Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Default, Serialize, Deserialize,
 )]
@@ -69,6 +69,10 @@ impl DateTime {
     pub fn val(&self) -> i64 {
         self.0
     }
+
+    pub fn to_chrono_datetime(&self) -> Option<NaiveDateTime> {
+        NaiveDateTime::from_timestamp_millis(self.0)
+    }
 }
 
 #[cfg(test)]

src/common/time/src/timestamp.rs

@@ -114,20 +114,23 @@ impl Timestamp {
     /// Format timestamp to ISO8601 string. If the timestamp exceeds what chrono timestamp can
     /// represent, this function simply print the timestamp unit and value in plain string.
     pub fn to_iso8601_string(&self) -> String {
-        let nano_factor = TimeUnit::Second.factor() / TimeUnit::Nanosecond.factor();
+        if let LocalResult::Single(datetime) = self.to_chrono_datetime() {
+            format!("{}", datetime.format("%Y-%m-%d %H:%M:%S%.f%z"))
+        } else {
+            format!("[Timestamp{}: {}]", self.unit, self.value)
+        }
+    }
 
+    pub fn to_chrono_datetime(&self) -> LocalResult<DateTime<Utc>> {
+        let nano_factor = TimeUnit::Second.factor() / TimeUnit::Nanosecond.factor();
         let (mut secs, mut nsecs) = self.split();
 
         if nsecs < 0 {
             secs -= 1;
             nsecs += nano_factor;
         }
 
-        if let LocalResult::Single(datetime) = Utc.timestamp_opt(secs, nsecs as u32) {
-            format!("{}", datetime.format("%Y-%m-%d %H:%M:%S%.f%z"))
-        } else {
-            format!("[Timestamp{}: {}]", self.unit, self.value)
-        }
+        Utc.timestamp_opt(secs, nsecs as u32)
     }
 }
 

src/servers/Cargo.toml

@@ -14,6 +14,7 @@ axum-macros = "0.3"
 base64 = "0.13"
 bytes = "1.2"
 catalog = { path = "../catalog" }
+chrono.workspace = true
 common-base = { path = "../common/base" }
 common-catalog = { path = "../common/catalog" }
 common-error = { path = "../common/error" }
@@ -40,6 +41,7 @@ openmetrics-parser = "0.4"
 opensrv-mysql = { git = "https://github.com/datafuselabs/opensrv", rev = "b44c9d1360da297b305abf33aecfa94888e1554c" }
 pgwire = "0.10"
 pin-project = "1.0"
+postgres-types = { version = "0.2", features = ["with-chrono-0_4"] }
 prost.workspace = true
 query = { path = "../query" }
 rand = "0.8"

src/servers/src/postgres/handler.rs

@@ -17,6 +17,7 @@ use std::sync::Arc;
 use std::time::Duration;
 
 use async_trait::async_trait;
+use chrono::LocalResult;
 use common_query::Output;
 use common_recordbatch::error::Result as RecordBatchResult;
 use common_recordbatch::RecordBatch;
@@ -171,9 +172,37 @@ fn encode_text_value(value: &Value, builder: &mut DataRowEncoder) -> PgWireResul
         Value::Float64(v) => builder.encode_text_format_field(Some(&v.0)),
         Value::String(v) => builder.encode_text_format_field(Some(&v.as_utf8())),
         Value::Binary(v) => builder.encode_text_format_field(Some(&hex::encode(v.deref()))),
-        Value::Date(v) => builder.encode_text_format_field(Some(&v.to_string())),
-        Value::DateTime(v) => builder.encode_text_format_field(Some(&v.to_string())),
-        Value::Timestamp(v) => builder.encode_text_format_field(Some(&v.to_iso8601_string())),
+        Value::Date(v) => {
+            if let Some(date) = v.to_chrono_date() {
+                builder.encode_text_format_field(Some(&date.format("%Y-%m-%d").to_string()))
+            } else {
+                Err(PgWireError::ApiError(Box::new(Error::Internal {
+                    err_msg: format!("Failed to convert date to postgres type {v:?}",),
+                })))
+            }
+        }
+        Value::DateTime(v) => {
+            if let Some(datetime) = v.to_chrono_datetime() {
+                builder.encode_text_format_field(Some(
+                    &datetime.format("%Y-%m-%d %H:%M:%S%.6f").to_string(),
+                ))
+            } else {
+                Err(PgWireError::ApiError(Box::new(Error::Internal {
+                    err_msg: format!("Failed to convert date to postgres type {v:?}",),
+                })))
+            }
+        }
+        Value::Timestamp(v) => {
+            if let LocalResult::Single(datetime) = v.to_chrono_datetime() {
+                builder.encode_text_format_field(Some(
+                    &datetime.format("%Y-%m-%d %H:%M:%S%.6f").to_string(),
+                ))
+            } else {
+                Err(PgWireError::ApiError(Box::new(Error::Internal {
+                    err_msg: format!("Failed to convert date to postgres type {v:?}",),
+                })))
+            }
+        }
         Value::List(_) => Err(PgWireError::ApiError(Box::new(Error::Internal {
             err_msg: format!(
                 "cannot write value {:?} in postgres protocol: unimplemented",
@@ -203,17 +232,32 @@ fn encode_binary_value(
         Value::Float64(v) => builder.encode_binary_format_field(&v.0, datatype),
         Value::String(v) => builder.encode_binary_format_field(&v.as_utf8(), datatype),
         Value::Binary(v) => builder.encode_binary_format_field(&v.deref(), datatype),
-        // TODO(sunng87): correct date/time types encoding
-        Value::Date(v) => builder.encode_binary_format_field(&v.to_string(), datatype),
-        Value::DateTime(v) => builder.encode_binary_format_field(&v.to_string(), datatype),
+        Value::Date(v) => {
+            if let Some(date) = v.to_chrono_date() {
+                builder.encode_binary_format_field(&date, datatype)
+            } else {
+                Err(PgWireError::ApiError(Box::new(Error::Internal {
+                    err_msg: format!("Failed to convert date to postgres type {v:?}",),
+                })))
+            }
+        }
+        Value::DateTime(v) => {
+            if let Some(datetime) = v.to_chrono_datetime() {
+                builder.encode_binary_format_field(&datetime, datatype)
+            } else {
+                Err(PgWireError::ApiError(Box::new(Error::Internal {
+                    err_msg: format!("Failed to convert datetime to postgres type {v:?}",),
+                })))
+            }
+        }
         Value::Timestamp(v) => {
             // convert timestamp to SystemTime
             if let Some(ts) = v.convert_to(TimeUnit::Microsecond) {
                 let sys_time = std::time::UNIX_EPOCH + Duration::from_micros(ts.value() as u64);
                 builder.encode_binary_format_field(&sys_time, datatype)
             } else {
                 Err(PgWireError::ApiError(Box::new(Error::Internal {
-                    err_msg: format!("Failed to conver timestamp to postgres type {v:?}",),
+                    err_msg: format!("Failed to convert timestamp to postgres type {v:?}",),
                 })))
             }
         }