/
insert.go
62 lines (52 loc) · 1.74 KB
/
insert.go
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// Copyright 2021 FerretDB 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 mysql
import (
"fmt"
"strings"
"github.com/FerretDB/FerretDB/internal/backends/mysql/metadata"
"github.com/FerretDB/FerretDB/internal/handler/sjson"
"github.com/FerretDB/FerretDB/internal/types"
"github.com/FerretDB/FerretDB/internal/util/lazyerrors"
)
// prepareInsertStatement returns a statement and arguments for inserting the given documents.
//
// If capped is true, it returns a statement and arguments for inserting record IDs and documents.
func prepareInsertStatement(schema, tableName string, capped bool, docs []*types.Document) (string, []any, error) {
var args []any
rows := make([]string, len(docs))
for i, doc := range docs {
b, err := sjson.Marshal(doc)
if err != nil {
return "", nil, lazyerrors.Error(err)
}
if capped {
rows[i] = "(?, ?)"
args = append(args, doc.RecordID(), string(b))
continue
}
rows[i] = "(?)"
args = append(args, string(b))
}
columns := metadata.DefaultColumn
if capped {
columns = strings.Join([]string{metadata.RecordIDColumn, metadata.DefaultColumn}, ", ")
}
return fmt.Sprintf(
`INSERT INTO %q.%q (%s) VALUES %s`,
schema, tableName,
columns,
strings.Join(rows, ", "),
), args, nil
}