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cotd.go
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cotd.go
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// Copyright 2024 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package functions
import (
"math"
"github.com/dolthub/doltgresql/server/functions/framework"
pgtypes "github.com/dolthub/doltgresql/server/types"
)
// initCotd registers the functions to the catalog.
func initCotd() {
framework.RegisterFunction(cotd_float64)
}
// cot_float64 represents the PostgreSQL function of the same name, taking the same parameters.
var cotd_float64 = framework.Function1{
Name: "cotd",
Return: pgtypes.Float64,
Parameters: []pgtypes.DoltgresType{pgtypes.Float64},
Callable: func(ctx framework.Context, val1Interface any) (any, error) {
if val1Interface == nil {
return nil, nil
}
val1 := toRadians(val1Interface.(float64))
if val1 == 0 {
return math.Inf(1), nil
}
return math.Cos(val1) / math.Sin(val1), nil
},
}