fix!: remove range calendar as To option (#2940)

fix: remove range calendar as `To` option

Author: Taylor-lagrange

src/query/src/range_select/plan_rewrite.rs

@@ -132,14 +132,15 @@ fn parse_duration_expr(args: &[Expr], i: usize) -> DFResult<Duration> {
 /// Parse the `align to` clause and return a UTC timestamp with unit of millisecond,
 /// which is used as the basis for dividing time slot during the align operation.
 /// 1. NOW: align to current execute time
-/// 2. CALENDAR (as Default Option): align to timestamp `0`
 /// 2. Timestamp string: align to specific timestamp
+/// 3. leave empty (as Default Option): align to unix epoch 0
 fn parse_align_to(args: &[Expr], i: usize) -> DFResult<i64> {
     let s = parse_str_expr(args, i)?;
     let upper = s.to_uppercase();
     match upper.as_str() {
         "NOW" => return Ok(Timestamp::current_millis().value()),
-        "CALENDAR" | "" => return Ok(0),
+        // default align to unix epoch 0
+        "" => return Ok(0),
         _ => (),
     }
     Timestamp::from_str(s)
@@ -748,16 +749,10 @@ mod test {
         let args = vec![Expr::Literal(ScalarValue::Utf8(Some("NOW".into())))];
         let epsinon = parse_align_to(&args, 0).unwrap() - Timestamp::current_millis().value();
         assert!(epsinon.abs() < 100);
-        // test CALENDAR
-        let args = vec![
-            Expr::Literal(ScalarValue::Utf8(Some("".into()))),
-            Expr::Literal(ScalarValue::Utf8(Some("CALENDAR".into()))),
-        ];
-        assert!(
-            parse_align_to(&args, 0).unwrap() == parse_align_to(&args, 1).unwrap()
-                && parse_align_to(&args, 0).unwrap() == 0
-        );
-        // test CALENDAR
+        // test default
+        let args = vec![Expr::Literal(ScalarValue::Utf8(Some("".into())))];
+        assert!(parse_align_to(&args, 0).unwrap() == 0);
+        // test Timestamp
         let args = vec![Expr::Literal(ScalarValue::Utf8(Some(
             "1970-01-01T00:00:00+08:00".into(),
         )))];

tests/cases/standalone/common/range/to.result

@@ -29,17 +29,6 @@ SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' ORDER BY host, ts;
 | 1970-01-03T00:00:00 | host2 | 6                                |
 +---------------------+-------+----------------------------------+
 
-SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO CALENDAR ORDER BY host, ts;
-
-+---------------------+-------+----------------------------------+
-| ts                  | host  | MIN(host.val) RANGE 1d FILL NULL |
-+---------------------+-------+----------------------------------+
-| 1970-01-02T00:00:00 | host1 | 0                                |
-| 1970-01-03T00:00:00 | host1 | 2                                |
-| 1970-01-02T00:00:00 | host2 | 4                                |
-| 1970-01-03T00:00:00 | host2 | 6                                |
-+---------------------+-------+----------------------------------+
-
 SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO UNKNOWN ORDER BY host, ts;
 
 Error: 3000(PlanQuery), DataFusion error: Error during planning: Illegal `align to` argument `UNKNOWN` in range select query, can't be parse as NOW/CALENDAR/Timestamp, error: Failed to parse a string into Timestamp, raw string: UNKNOWN

tests/cases/standalone/common/range/to.sql

@@ -16,8 +16,6 @@ INSERT INTO TABLE host VALUES
 
 SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' ORDER BY host, ts;
 
-SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO CALENDAR ORDER BY host, ts;
-
 SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO UNKNOWN ORDER BY host, ts;
 
 SELECT ts, host, min(val) RANGE '1d' FROM host ALIGN '1d' TO '1900-01-01T00:00:00+01:00' ORDER BY host, ts;