/
msg_listindexes.go
124 lines (101 loc) · 3.26 KB
/
msg_listindexes.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 pg
import (
"context"
"errors"
"fmt"
"github.com/jackc/pgx/v5"
"github.com/FerretDB/FerretDB/internal/handlers/common"
"github.com/FerretDB/FerretDB/internal/handlers/commonerrors"
"github.com/FerretDB/FerretDB/internal/handlers/commonparams"
"github.com/FerretDB/FerretDB/internal/handlers/pg/pgdb"
"github.com/FerretDB/FerretDB/internal/types"
"github.com/FerretDB/FerretDB/internal/util/lazyerrors"
"github.com/FerretDB/FerretDB/internal/util/must"
"github.com/FerretDB/FerretDB/internal/wire"
)
// MsgListIndexes implements HandlerInterface.
func (h *Handler) MsgListIndexes(ctx context.Context, msg *wire.OpMsg) (*wire.OpMsg, error) {
dbPool, err := h.DBPool(ctx)
if err != nil {
return nil, lazyerrors.Error(err)
}
document, err := msg.Document()
if err != nil {
return nil, lazyerrors.Error(err)
}
common.Ignored(document, h.L, "comment", "cursor")
var db string
if db, err = common.GetRequiredParam[string](document, "$db"); err != nil {
return nil, err
}
var collectionParam any
if collectionParam, err = document.Get(document.Command()); err != nil {
return nil, err
}
collection, ok := collectionParam.(string)
if !ok {
return nil, commonerrors.NewCommandErrorMsgWithArgument(
commonerrors.ErrBadValue,
fmt.Sprintf("collection name has invalid type %s", commonparams.AliasFromType(collectionParam)),
document.Command(),
)
}
var indexes []pgdb.Index
err = dbPool.InTransactionRetry(ctx, func(tx pgx.Tx) error {
indexes, err = pgdb.Indexes(ctx, tx, db, collection)
return err
})
switch {
case err == nil:
// do nothing
case errors.Is(err, pgdb.ErrTableNotExist):
return nil, commonerrors.NewCommandErrorMsg(
commonerrors.ErrNamespaceNotFound,
fmt.Sprintf("ns does not exist: %s.%s", db, collection),
)
default:
return nil, lazyerrors.Error(err)
}
firstBatch := types.MakeArray(len(indexes))
for _, index := range indexes {
indexKey := must.NotFail(types.NewDocument())
for _, key := range index.Key {
indexKey.Set(key.Field, int32(key.Order))
}
indexDoc := must.NotFail(types.NewDocument(
"v", int32(2),
"key", indexKey,
"name", index.Name,
))
// only non-default unique indexes should have unique field in the response
if index.Unique != nil && *index.Unique && index.Name != "_id_" {
indexDoc.Set("unique", *index.Unique)
}
firstBatch.Append(indexDoc)
}
var reply wire.OpMsg
must.NoError(reply.SetSections(wire.OpMsgSection{
Documents: []*types.Document{must.NotFail(types.NewDocument(
"cursor", must.NotFail(types.NewDocument(
"id", int64(0),
"ns", fmt.Sprintf("%s.%s", db, collection),
"firstBatch", firstBatch,
)),
"ok", float64(1),
))},
}))
return &reply, nil
}