wehub-resource-sync
52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
// 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 (
|
|
"io"
|
|
|
|
"github.com/dolthub/go-mysql-server/sql"
|
|
|
|
"github.com/dolthub/doltgresql/server/functions/framework"
|
|
pgtypes "github.com/dolthub/doltgresql/server/types"
|
|
)
|
|
|
|
// initUnnest registers the functions to the catalog.
|
|
func initUnnest() {
|
|
framework.RegisterFunction(unnest)
|
|
}
|
|
|
|
// unnest represents the PostgreSQL function of the same name, taking the same parameters.
|
|
var unnest = framework.Function1{
|
|
Name: "unnest",
|
|
Return: pgtypes.RowTypeWithReturnType(pgtypes.AnyElement),
|
|
Parameters: [1]*pgtypes.DoltgresType{pgtypes.AnyArray},
|
|
Strict: true,
|
|
SRF: true,
|
|
Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val1 any) (any, error) {
|
|
valArr := val1.([]interface{})
|
|
|
|
var i = 0
|
|
return pgtypes.NewSetReturningFunctionRowIter(func(ctx *sql.Context) (sql.Row, error) {
|
|
defer func() { i++ }()
|
|
|
|
if i >= len(valArr) {
|
|
return nil, io.EOF
|
|
}
|
|
return sql.Row{valArr[i]}, nil
|
|
}), nil
|
|
},
|
|
}
|