wehub-resource-sync
116 lines
3.0 KiB
Go
Executable File
116 lines
3.0 KiB
Go
Executable File
// Copyright 2025 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 aggregate
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import (
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"github.com/dolthub/go-mysql-server/sql"
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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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// initBoolAggs registers the functions to the catalog.
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func initBoolAggs() {
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framework.RegisterAggregateFunction(boolAnd)
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framework.RegisterAggregateFunction(boolOr)
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}
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// boolAnd represents the PostgreSQL bool_and function.
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var boolAnd = framework.Func1Aggregate{
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Function1: framework.Function1{
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Name: "bool_and",
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Return: pgtypes.Bool,
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Parameters: [1]*pgtypes.DoltgresType{
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pgtypes.Bool,
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},
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Callable: func(ctx *sql.Context, paramsAndReturn [2]*pgtypes.DoltgresType, val1 any) (any, error) {
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return nil, nil
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},
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},
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NewAggBuffer: newBoolAndBuffer,
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}
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// boolOr represents the PostgreSQL bool_or function.
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var boolOr = framework.Func1Aggregate{
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Function1: framework.Function1{
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Name: "bool_or",
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Return: pgtypes.Bool,
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Parameters: [1]*pgtypes.DoltgresType{
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pgtypes.Bool,
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},
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Callable: func(ctx *sql.Context, paramsAndReturn [2]*pgtypes.DoltgresType, val1 any) (any, error) {
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return nil, nil
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},
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},
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NewAggBuffer: newBoolOrBuffer,
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}
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// boolAggBuffer is an aggregation buffer for boolean logic aggregates
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type boolAggBuffer struct {
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expr sql.Expression
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b bool
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sawOne bool
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isAnd bool
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}
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var _ sql.AggregationBuffer = (*boolAggBuffer)(nil)
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// newBoolAndBuffer creates a new aggregation buffer for the bool_and aggregate function.
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func newBoolAndBuffer(exprs []sql.Expression) (sql.AggregationBuffer, error) {
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return &boolAggBuffer{
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expr: exprs[0],
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b: true,
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isAnd: true,
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}, nil
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}
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// newBoolOrBuffer creates a new aggregation buffer for the bool_or aggregate function.
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func newBoolOrBuffer(exprs []sql.Expression) (sql.AggregationBuffer, error) {
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return &boolAggBuffer{
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expr: exprs[0],
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}, nil
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}
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// Dispose implements the sql.AggregationBuffer interface.
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func (a *boolAggBuffer) Dispose(ctx *sql.Context) {}
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// Eval implements the sql.AggregationBuffer interface.
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func (a *boolAggBuffer) Eval(context *sql.Context) (interface{}, error) {
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if !a.sawOne {
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return nil, nil
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}
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return a.b, nil
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}
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// Update implements the sql.AggregationBuffer interface.
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func (a *boolAggBuffer) Update(ctx *sql.Context, row sql.Row) error {
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eval, err := a.expr.Eval(ctx, row)
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if err != nil {
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return err
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}
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if eval == nil {
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return nil
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}
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a.sawOne = true
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if a.isAnd {
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a.b = a.b && eval.(bool)
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} else {
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a.b = a.b || eval.(bool)
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}
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return nil
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}
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