wehub-resource-sync
105 lines
3.7 KiB
Go
105 lines
3.7 KiB
Go
// Copyright 2024 Dolthub, Inc.
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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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package binary
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import (
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"github.com/cockroachdb/apd/v3"
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"github.com/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/types"
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"github.com/dolthub/doltgresql/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// These functions can be gathered using the following query from a Postgres 15 instance:
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// SELECT * FROM pg_operator o WHERE o.oprname = '%' ORDER BY o.oprcode::varchar;
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// initBinaryMod registers the functions to the catalog.
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func initBinaryMod() {
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framework.RegisterBinaryFunction(framework.Operator_BinaryMod, int2mod)
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framework.RegisterBinaryFunction(framework.Operator_BinaryMod, int4mod)
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framework.RegisterBinaryFunction(framework.Operator_BinaryMod, int8mod)
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framework.RegisterBinaryFunction(framework.Operator_BinaryMod, numeric_mod)
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}
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// int2mod represents the PostgreSQL function of the same name, taking the same parameters.
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var int2mod = framework.Function2{
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Name: "int2mod",
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Return: pgtypes.Int16,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int16, pgtypes.Int16},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(int16) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(int16) % val2.(int16), nil
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},
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}
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// int4mod represents the PostgreSQL function of the same name, taking the same parameters.
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var int4mod = framework.Function2{
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Name: "int4mod",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int32, pgtypes.Int32},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(int32) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(int32) % val2.(int32), nil
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},
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}
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// int8mod represents the PostgreSQL function of the same name, taking the same parameters.
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var int8mod = framework.Function2{
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Name: "int8mod",
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Return: pgtypes.Int64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int64, pgtypes.Int64},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(int64) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(int64) % val2.(int64), nil
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},
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}
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// numeric_mod represents the PostgreSQL function of the same name, taking the same parameters.
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var numeric_mod = framework.Function2{
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Name: "numeric_mod",
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Return: pgtypes.Numeric,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Numeric, pgtypes.Numeric},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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num1 := val1.(*apd.Decimal)
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num2 := val2.(*apd.Decimal)
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if num1.Form == apd.NaN || num2.Form == apd.NaN ||
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(num1.Form == apd.Infinite && num2.Form == apd.Infinite) {
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return pgtypes.NumericNaN, nil
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}
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if num2.IsZero() {
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return nil, errors.Errorf("division by zero")
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}
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if num1.Form == apd.Infinite {
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return num1, nil
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}
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if num2.Form == apd.Infinite {
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return apd.New(0, 0), nil
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}
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return types.DecimalMod(num1, num2)
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},
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}
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