Copy almost all the counter_agg functions for gauge_agg.

extension/src/gauge_agg.rs

@@ -45,6 +45,10 @@ mod toolkit_experimental {
     }
 
     ron_inout_funcs!(GaugeSummary);
+
+    // hack to allow us to qualify names with "toolkit_experimental"
+    // so that pgx generates the correct SQL
+    pub(crate) use crate::accessors::toolkit_experimental::*;
 }
 
 use toolkit_experimental::*;
@@ -92,7 +96,7 @@ impl GaugeSummaryTransState {
         // TODO build method should check validity
         // check bounds only after we've combined all the points, so we aren't doing it all the time.
         if !summary.bounds_valid() {
-            panic!("counter bounds invalid")
+            panic!("Metric bounds invalid")
         }
         self.summary_buffer.push(summary.build());
     }
@@ -284,7 +288,7 @@ fn gauge_agg_final_inner(
                 Some(st) => {
                     // there are some edge cases that this should prevent, but I'm not sure it's necessary, we do check the bounds in the functions that use them.
                     if !st.bounds_valid() {
-                        panic!("counter bounds invalid")
+                        panic!("Metric bounds invalid")
                     }
                     Some(GaugeSummary::from(st))
                 }
@@ -362,39 +366,234 @@ extension_sql!(
     ],
 );
 
-#[pg_extern(
-    name = "delta",
-    strict,
-    immutable,
-    parallel_safe,
-    schema = "toolkit_experimental"
-)]
-fn gauge_agg_delta(summary: GaugeSummary) -> f64 {
+// TODO Reconsider using the same pg_type for counter and gauge aggregates to avoid duplicating all these functions.
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_delta(sketch: GaugeSummary, _accessor: toolkit_experimental::AccessorDelta) -> f64 {
+    delta(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn delta(summary: GaugeSummary) -> f64 {
     MetricSummary::from(summary).delta()
 }
 
-#[pg_extern(
-    name = "idelta_left",
-    strict,
-    immutable,
-    parallel_safe,
-    schema = "toolkit_experimental"
-)]
-fn gauge_agg_idelta_left(summary: GaugeSummary) -> f64 {
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_gauge_agg_rate(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorRate,
+) -> Option<f64> {
+    rate(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn rate(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).rate()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_time_delta(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorTimeDelta,
+) -> f64 {
+    time_delta(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn time_delta(summary: GaugeSummary) -> f64 {
+    MetricSummary::from(summary).time_delta()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_irate_left(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorIRateLeft,
+) -> Option<f64> {
+    irate_left(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn irate_left(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).irate_left()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_irate_right(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorIRateRight,
+) -> Option<f64> {
+    irate_right(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn irate_right(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).irate_right()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_idelta_left(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorIDeltaLeft,
+) -> f64 {
+    idelta_left(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn idelta_left(summary: GaugeSummary) -> f64 {
     MetricSummary::from(summary).idelta_left()
 }
 
-#[pg_extern(
-    name = "idelta_right",
-    strict,
-    immutable,
-    parallel_safe,
-    schema = "toolkit_experimental"
-)]
-fn gauge_agg_idelta_right(summary: GaugeSummary) -> f64 {
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_idelta_right(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorIDeltaRight,
+) -> f64 {
+    idelta_right(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn idelta_right(summary: GaugeSummary) -> f64 {
     MetricSummary::from(summary).idelta_right()
 }
 
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_with_bounds(
+    sketch: GaugeSummary,
+    accessor: toolkit_experimental::AccessorWithBounds,
+) -> GaugeSummary<'static> {
+    let mut builder = GaugeSummaryBuilder::from(MetricSummary::from(sketch));
+    builder.set_bounds(accessor.bounds());
+    builder.build().into()
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn with_bounds(summary: GaugeSummary, bounds: tstzrange) -> GaugeSummary {
+    // TODO dedup with previous by using apply_bounds
+    unsafe {
+        let ptr = bounds.0 as *mut pg_sys::varlena;
+        let mut builder = GaugeSummaryBuilder::from(MetricSummary::from(summary));
+        builder.set_bounds(get_range(ptr));
+        builder.build().into()
+    }
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_extrapolated_delta(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorExtrapolatedDelta,
+) -> Option<f64> {
+    extrapolated_delta(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn extrapolated_delta(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).prometheus_delta().unwrap()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_extrapolated_rate(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorExtrapolatedRate,
+) -> Option<f64> {
+    extrapolated_rate(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn extrapolated_rate(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).prometheus_rate().unwrap()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_num_elements(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorNumElements,
+) -> i64 {
+    num_elements(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn num_elements(summary: GaugeSummary) -> i64 {
+    MetricSummary::from(summary).stats.n as i64
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_num_changes(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorNumChanges,
+) -> i64 {
+    num_changes(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn num_changes(summary: GaugeSummary) -> i64 {
+    MetricSummary::from(summary).num_changes as i64
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_slope(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorSlope,
+) -> Option<f64> {
+    slope(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn slope(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).stats.slope()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_intercept(
+    sketch: GaugeSummary,
+    _accessor: toolkit_experimental::AccessorIntercept,
+) -> Option<f64> {
+    intercept(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn intercept(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).stats.intercept()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_corr(sketch: GaugeSummary, _accessor: toolkit_experimental::AccessorCorr) -> Option<f64> {
+    corr(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn corr(summary: GaugeSummary) -> Option<f64> {
+    MetricSummary::from(summary).stats.corr()
+}
+
+#[pg_operator(immutable, parallel_safe)]
+#[opname(->)]
+fn arrow_zero_time(
+    sketch: GaugeSummary,
+    __accessor: toolkit_experimental::AccessorZeroTime,
+) -> Option<crate::raw::TimestampTz> {
+    gauge_zero_time(sketch)
+}
+
+#[pg_extern(strict, immutable, parallel_safe, schema = "toolkit_experimental")]
+fn gauge_zero_time(summary: GaugeSummary) -> Option<crate::raw::TimestampTz> {
+    Some(((MetricSummary::from(summary).stats.x_intercept()? * 1_000_000.0) as i64).into())
+}
+
 impl From<GaugeSummary<'_>> for MetricSummary {
     fn from(pg: GaugeSummary<'_>) -> Self {
         Self {