[AURON #2130] Implement native function of weekofyear

Signed-off-by: weimingdiit <weimingdiit@gmail.com>

Author: weimingdiit

native-engine/datafusion-ext-functions/src/lib.rs

@@ -75,6 +75,7 @@ pub fn create_auron_ext_function(
         "Spark_Month" => Arc::new(spark_dates::spark_month),
         "Spark_Day" => Arc::new(spark_dates::spark_day),
         "Spark_DayOfWeek" => Arc::new(spark_dates::spark_dayofweek),
+        "Spark_WeekOfYear" => Arc::new(spark_dates::spark_weekofyear),
         "Spark_Quarter" => Arc::new(spark_dates::spark_quarter),
         "Spark_Hour" => Arc::new(spark_dates::spark_hour),
         "Spark_Minute" => Arc::new(spark_dates::spark_minute),

native-engine/datafusion-ext-functions/src/spark_dates.rs

@@ -20,7 +20,7 @@ use arrow::{
     compute::{DatePart, date_part},
     datatypes::{DataType, TimeUnit},
 };
-use chrono::{TimeZone, Utc, prelude::*};
+use chrono::{Duration, TimeZone, Utc, prelude::*};
 use chrono_tz::Tz;
 use datafusion::{
     common::{Result, ScalarValue},
@@ -72,6 +72,78 @@ pub fn spark_dayofweek(args: &[ColumnarValue]) -> Result<ColumnarValue> {
     Ok(ColumnarValue::Array(Arc::new(dayofweek)))
 }
 
+/// `spark_weekofyear(date/timestamp/compatible-string[, timezone])`
+///
+/// Matches Spark's `weekofyear()` semantics:
+/// ISO week numbering, with Monday as the first day of the week,
+/// and week 1 defined as the first week with more than 3 days.
+///
+/// For `Timestamp` inputs, this function interprets epoch milliseconds in the
+/// provided timezone (if any) before deriving the calendar date and ISO week.
+/// If no timezone is provided, `UTC` is used by default. For `Date` and
+/// compatible string inputs, the behavior is unchanged: the value is cast to
+/// `Date32` and the ISO week is computed from the resulting date.
+pub fn spark_weekofyear(args: &[ColumnarValue]) -> Result<ColumnarValue> {
+    // First argument as an Arrow array (date/timestamp/string, etc.)
+    let array = args[0].clone().into_array(1)?;
+
+    // Determine timezone (for timestamp inputs). Default to UTC to match
+    // existing behavior when no timezone is provided.
+    let default_tz = chrono_tz::UTC;
+    let tz: Tz = if args.len() > 1 {
+        match &args[1] {
+            ColumnarValue::Scalar(ScalarValue::Utf8(Some(s)))
+            | ColumnarValue::Scalar(ScalarValue::LargeUtf8(Some(s))) => {
+                s.parse::<Tz>().unwrap_or(default_tz)
+            }
+            _ => default_tz,
+        }
+    } else {
+        default_tz
+    };
+
+    match array.data_type() {
+        // Timestamp inputs: localize epoch milliseconds before computing ISO week
+        DataType::Timestamp(TimeUnit::Millisecond, _) => {
+            let ts_arr = array
+                .as_any()
+                .downcast_ref::<TimestampMillisecondArray>()
+                .expect("internal cast to TimestampMillisecondArray must succeed");
+
+            let weekofyear = Int32Array::from_iter(ts_arr.iter().map(|opt_ms| {
+                opt_ms.map(|ms| {
+                    // Localize epoch milliseconds to the chosen timezone, then
+                    // derive the ISO week number from the resulting date.
+                    let dt = tz.timestamp_millis(ms);
+                    dt.date_naive().iso_week().week() as i32
+                })
+            }));
+
+            Ok(ColumnarValue::Array(Arc::new(weekofyear)))
+        }
+        // Non-timestamp inputs: preserve existing Date32-based behavior
+        _ => {
+            let input = cast(&array, &DataType::Date32)?;
+            let input = input
+                .as_any()
+                .downcast_ref::<Date32Array>()
+                .expect("internal cast to Date32 must succeed");
+
+            let epoch =
+                NaiveDate::from_ymd_opt(1970, 1, 1).expect("1970-01-01 must be a valid date");
+            let weekofyear = Int32Array::from_iter(input.iter().map(|opt_days| {
+                opt_days.and_then(|days| {
+                    epoch
+                        .checked_add_signed(Duration::days(days as i64))
+                        .map(|date| date.iso_week().week() as i32)
+                })
+            }));
+
+            Ok(ColumnarValue::Array(Arc::new(weekofyear)))
+        }
+    }
+}
+
 /// `spark_quarter(date/timestamp/compatible-string)`
 ///
 /// Simulates Spark's `quarter()` function.
@@ -307,6 +379,29 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn test_spark_weekofyear() -> Result<()> {
+        let input = Arc::new(Date32Array::from(vec![
+            Some(0),
+            Some(4017),
+            Some(16801),
+            Some(17167),
+            Some(14455),
+            None,
+        ]));
+        let args = vec![ColumnarValue::Array(input)];
+        let expected_ret: ArrayRef = Arc::new(Int32Array::from(vec![
+            Some(1),
+            Some(1),
+            Some(53),
+            Some(52),
+            Some(31),
+            None,
+        ]));
+        assert_eq!(&spark_weekofyear(&args)?.into_array(1)?, &expected_ret);
+        Ok(())
+    }
+
     #[test]
     fn test_spark_quarter_basic() -> Result<()> {
         // Date32 days relative to 1970-01-01:

spark-extension-shims-spark/src/test/scala/org/apache/auron/AuronFunctionSuite.scala

@@ -164,6 +164,35 @@ class AuronFunctionSuite extends AuronQueryTest with BaseAuronSQLSuite {
     }
   }
 
+  test("weekofyear function") {
+    withSQLConf("spark.sql.session.timeZone" -> "America/Los_Angeles") {
+      withTable("t1") {
+        sql(
+          "create table t1(c1 date, c2 date, c3 date, c4 date, c5 timestamp, c6 string) using parquet")
+        sql("""insert into t1 values (
+            |  date'2009-07-30',
+            |  date'1980-12-31',
+            |  date'2016-01-01',
+            |  date'2017-01-01',
+            |  timestamp'2016-01-03 23:30:00',
+            |  '2016-01-01'
+            |)""".stripMargin)
+
+        val query =
+          """select
+            |  weekofyear(c1),
+            |  weekofyear(c2),
+            |  weekofyear(c3),
+            |  weekofyear(c4),
+            |  weekofyear(c5),
+            |  weekofyear(c6)
+            |from t1
+            |""".stripMargin
+        checkSparkAnswerAndOperator(query)
+      }
+    }
+  }
+
   test("round function with varying scales for intPi") {
     withTable("t2") {
       sql("CREATE TABLE t2 (c1 INT) USING parquet")

spark-extension/src/main/scala/org/apache/spark/sql/auron/NativeConverters.scala

@@ -940,6 +940,9 @@ object NativeConverters extends Logging {
       case DayOfMonth(child) => buildExtScalarFunction("Spark_Day", child :: Nil, IntegerType)
       case DayOfWeek(child) =>
         buildExtScalarFunction("Spark_DayOfWeek", child :: Nil, IntegerType)
+      case WeekOfYear(child) =>
+        buildExtScalarFunction("Spark_WeekOfYear", child :: Nil, IntegerType)
+
       case Quarter(child) => buildExtScalarFunction("Spark_Quarter", child :: Nil, IntegerType)
 
       case e: Levenshtein =>