wehub-resource-sync
332 lines
12 KiB
Go
332 lines
12 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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"math"
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"strings"
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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/doltgresql/postgres/parser/duration"
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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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// initBinaryDivide registers the functions to the catalog.
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func initBinaryDivide() {
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, float4div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, float48div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, float8div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, float84div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int2div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int24div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int28div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int4div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int42div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int48div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int8div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int82div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, int84div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, interval_div)
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framework.RegisterBinaryFunction(framework.Operator_BinaryDivide, numeric_div)
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}
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// float4div_callable is the callable logic for the float4div function.
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func float4div_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(float32) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(float32) / val2.(float32), nil
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}
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// float4div represents the PostgreSQL function of the same name, taking the same parameters.
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var float4div = framework.Function2{
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Name: "float4div",
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Return: pgtypes.Float32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Float32, pgtypes.Float32},
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Strict: true,
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Callable: float4div_callable,
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}
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// float48div_callable is the callable logic for the float48div function.
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func float48div_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(float64) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return float64(val1.(float32)) / val2.(float64), nil
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}
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// float48div represents the PostgreSQL function of the same name, taking the same parameters.
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var float48div = framework.Function2{
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Name: "float48div",
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Return: pgtypes.Float64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Float32, pgtypes.Float64},
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Strict: true,
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Callable: float48div_callable,
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}
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// float8div_callable is the callable logic for the float8div function.
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func float8div_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(float64) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(float64) / val2.(float64), nil
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}
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// float8div represents the PostgreSQL function of the same name, taking the same parameters.
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var float8div = framework.Function2{
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Name: "float8div",
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Return: pgtypes.Float64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Float64, pgtypes.Float64},
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Strict: true,
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Callable: float8div_callable,
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}
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// float84div_callable is the callable logic for the float84div function.
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func float84div_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(float32) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(float64) / float64(val2.(float32)), nil
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}
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// float84div represents the PostgreSQL function of the same name, taking the same parameters.
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var float84div = framework.Function2{
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Name: "float84div",
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Return: pgtypes.Float64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Float64, pgtypes.Float32},
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Strict: true,
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Callable: float84div_callable,
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}
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// int2div_callable is the callable logic for the int2div function.
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func int2div_callable(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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// int2div represents the PostgreSQL function of the same name, taking the same parameters.
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var int2div = framework.Function2{
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Name: "int2div",
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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: int2div_callable,
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}
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// int24div_callable is the callable logic for the int24div function.
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func int24div_callable(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 int32(val1.(int16)) / val2.(int32), nil
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}
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// int24div represents the PostgreSQL function of the same name, taking the same parameters.
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var int24div = framework.Function2{
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Name: "int24div",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int16, pgtypes.Int32},
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Strict: true,
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Callable: int24div_callable,
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}
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// int28div_callable is the callable logic for the int28div function.
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func int28div_callable(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 int64(val1.(int16)) / val2.(int64), nil
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}
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// int28div represents the PostgreSQL function of the same name, taking the same parameters.
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var int28div = framework.Function2{
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Name: "int28div",
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Return: pgtypes.Int64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int16, pgtypes.Int64},
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Strict: true,
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Callable: int28div_callable,
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}
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// int4div_callable is the callable logic for the int4div function.
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func int4div_callable(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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// int4div represents the PostgreSQL function of the same name, taking the same parameters.
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var int4div = framework.Function2{
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Name: "int4div",
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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: int4div_callable,
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}
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// int42div_callable is the callable logic for the int42div function.
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func int42div_callable(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.(int32) / int32(val2.(int16)), nil
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}
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// int42div represents the PostgreSQL function of the same name, taking the same parameters.
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var int42div = framework.Function2{
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Name: "int42div",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int32, pgtypes.Int16},
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Strict: true,
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Callable: int42div_callable,
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}
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// int48div_callable is the callable logic for the int48div function.
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func int48div_callable(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 int64(val1.(int32)) / val2.(int64), nil
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}
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// int48div represents the PostgreSQL function of the same name, taking the same parameters.
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var int48div = framework.Function2{
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Name: "int48div",
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Return: pgtypes.Int64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int32, pgtypes.Int64},
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Strict: true,
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Callable: int48div_callable,
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}
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// int8div_callable is the callable logic for the int8div function.
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func int8div_callable(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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// int8div represents the PostgreSQL function of the same name, taking the same parameters.
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var int8div = framework.Function2{
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Name: "int8div",
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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: int8div_callable,
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}
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// int82div_callable is the callable logic for the int82div function.
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func int82div_callable(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.(int64) / int64(val2.(int16)), nil
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}
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// int82div represents the PostgreSQL function of the same name, taking the same parameters.
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var int82div = framework.Function2{
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Name: "int82div",
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Return: pgtypes.Int64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int64, pgtypes.Int16},
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Strict: true,
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Callable: int82div_callable,
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}
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// int84div_callable is the callable logic for the int84div function.
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func int84div_callable(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.(int64) / int64(val2.(int32)), nil
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}
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// int84div represents the PostgreSQL function of the same name, taking the same parameters.
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var int84div = framework.Function2{
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Name: "int84div",
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Return: pgtypes.Int64,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int64, pgtypes.Int32},
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Strict: true,
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Callable: int84div_callable,
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}
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// interval_div_callable is the callable logic for the interval_div function.
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func interval_div_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2.(float64) == 0 {
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return nil, errors.Errorf("division by zero")
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}
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return val1.(duration.Duration).DivFloat(val2.(float64)), nil
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}
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// interval_div represents the PostgreSQL function of the same name, taking the same parameters.
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var interval_div = framework.Function2{
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Name: "interval_div",
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Return: pgtypes.Interval,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Interval, pgtypes.Float64},
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Strict: true,
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Callable: interval_div_callable,
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}
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// numeric_div_callable is the callable logic for the numeric_div function.
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func numeric_div_callable(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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res := new(apd.Decimal)
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// enough precision to scale to at most 16 decimal places
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p := num1.NumDigits() + int64(math.Abs(float64(num1.Exponent))) + 16
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_, err := sql.DecimalCtx.WithPrecision(uint32(p)).Quo(res, num1, num2)
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if err != nil {
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return nil, err
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}
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// the exponent value depends on the number of digits before decimal places.
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parts := strings.Split(res.Text('f'), ".")
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whole := (len(parts[0]) + 4 - 1) / 4
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exp := int32(16 - (whole-1)*4)
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return sql.DecimalRound(res, exp)
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}
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// numeric_div represents the PostgreSQL function of the same name, taking the same parameters.
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var numeric_div = framework.Function2{
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Name: "numeric_div",
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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: numeric_div_callable,
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}
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