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103 lines
3.3 KiB
Rust
103 lines
3.3 KiB
Rust
// Copyright 2023 Greptime Team
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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mod argmax;
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mod argmin;
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mod diff;
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mod mean;
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mod polyval;
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mod scipy_stats_norm_cdf;
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mod scipy_stats_norm_pdf;
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use std::sync::Arc;
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pub use argmax::ArgmaxAccumulatorCreator;
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pub use argmin::ArgminAccumulatorCreator;
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use common_query::logical_plan::AggregateFunctionCreatorRef;
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pub use diff::DiffAccumulatorCreator;
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pub use mean::MeanAccumulatorCreator;
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pub use polyval::PolyvalAccumulatorCreator;
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pub use scipy_stats_norm_cdf::ScipyStatsNormCdfAccumulatorCreator;
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pub use scipy_stats_norm_pdf::ScipyStatsNormPdfAccumulatorCreator;
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use crate::function_registry::FunctionRegistry;
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/// A function creates `AggregateFunctionCreator`.
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/// "Aggregator" *is* AggregatorFunction. Since the later one is long, we named an short alias for it.
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/// The two names might be used interchangeably.
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type AggregatorCreatorFunction = Arc<dyn Fn() -> AggregateFunctionCreatorRef + Send + Sync>;
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/// `AggregateFunctionMeta` dynamically creates AggregateFunctionCreator.
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#[derive(Clone)]
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pub struct AggregateFunctionMeta {
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name: String,
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args_count: u8,
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creator: AggregatorCreatorFunction,
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}
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pub type AggregateFunctionMetaRef = Arc<AggregateFunctionMeta>;
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impl AggregateFunctionMeta {
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pub fn new(name: &str, args_count: u8, creator: AggregatorCreatorFunction) -> Self {
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Self {
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name: name.to_string(),
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args_count,
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creator,
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}
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}
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pub fn name(&self) -> String {
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self.name.to_string()
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}
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pub fn args_count(&self) -> u8 {
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self.args_count
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}
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pub fn create(&self) -> AggregateFunctionCreatorRef {
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(self.creator)()
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}
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}
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pub(crate) struct AggregateFunctions;
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impl AggregateFunctions {
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pub fn register(registry: &FunctionRegistry) {
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macro_rules! register_aggr_func {
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($name :expr, $arg_count :expr, $creator :ty) => {
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registry.register_aggregate_function(Arc::new(AggregateFunctionMeta::new(
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$name,
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$arg_count,
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Arc::new(|| Arc::new(<$creator>::default())),
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)));
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};
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}
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register_aggr_func!("diff", 1, DiffAccumulatorCreator);
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register_aggr_func!("mean", 1, MeanAccumulatorCreator);
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register_aggr_func!("polyval", 2, PolyvalAccumulatorCreator);
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register_aggr_func!("argmax", 1, ArgmaxAccumulatorCreator);
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register_aggr_func!("argmin", 1, ArgminAccumulatorCreator);
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register_aggr_func!("scipystatsnormcdf", 2, ScipyStatsNormCdfAccumulatorCreator);
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register_aggr_func!("scipystatsnormpdf", 2, ScipyStatsNormPdfAccumulatorCreator);
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#[cfg(feature = "geo")]
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register_aggr_func!(
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"json_encode_path",
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3,
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super::geo::encoding::JsonPathEncodeFunctionCreator
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);
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}
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}
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