56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
// Copyright 2023 PingCAP, 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 resultset
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import "github.com/pingcap/tidb/pkg/util/chunk"
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// CursorResultSet extends the `ResultSet` to provide the ability to store an iterator
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type CursorResultSet interface {
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ResultSet
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StoreRowContainerReader(reader chunk.RowContainerReader)
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GetRowContainerReader() chunk.RowContainerReader
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}
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// WrapWithCursor wraps a ResultSet into a CursorResultSet
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func WrapWithCursor(rs ResultSet) CursorResultSet {
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return &tidbCursorResultSet{
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rs, nil,
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}
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}
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var _ CursorResultSet = &tidbCursorResultSet{}
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type tidbCursorResultSet struct {
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ResultSet
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reader chunk.RowContainerReader
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}
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func (tcrs *tidbCursorResultSet) StoreRowContainerReader(reader chunk.RowContainerReader) {
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tcrs.reader = reader
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}
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func (tcrs *tidbCursorResultSet) GetRowContainerReader() chunk.RowContainerReader {
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return tcrs.reader
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}
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// FetchNotifier represents notifier will be called in COM_FETCH.
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type FetchNotifier interface {
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// OnFetchReturned be called when COM_FETCH returns.
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// it will be used in server-side cursor.
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OnFetchReturned()
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}
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