64 lines
2.0 KiB
Go
64 lines
2.0 KiB
Go
// Copyright 2024 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 commontest
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import (
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"context"
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"fmt"
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"testing"
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"github.com/pingcap/tidb/pkg/parser/mysql"
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"github.com/pingcap/tidb/pkg/server/internal/resultset"
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"github.com/pingcap/tidb/pkg/server/tests/servertestkit"
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"github.com/stretchr/testify/require"
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)
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func TestLazyRowIterator(t *testing.T) {
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ts := servertestkit.CreateTidbTestSuite(t)
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qctx, err := ts.Tidbdrv.OpenCtx(uint64(0), 0, uint8(mysql.DefaultCollationID), "test", nil, nil)
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require.NoError(t, err)
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ctx := context.Background()
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_, err = Execute(ctx, qctx, "use test")
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require.NoError(t, err)
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_, err = Execute(ctx, qctx, "create table t (id int)")
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require.NoError(t, err)
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// insert 1000 rows
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for i := range 1000 {
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_, err = Execute(ctx, qctx, fmt.Sprintf("insert into t values (%d)", i))
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require.NoError(t, err)
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}
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for _, chkSize := range []struct{ initSize, maxSize int }{
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{1024, 1024}, {512, 512}, {256, 256}, {100, 100}} {
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rs, err := Execute(ctx, qctx, "select * from t")
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require.NoError(t, err)
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crs := resultset.WrapWithLazyCursor(rs, chkSize.initSize, chkSize.maxSize)
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iter := crs.GetRowIterator()
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for i := range 1000 {
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row := iter.Current(ctx)
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require.Equal(t, int64(i), row.GetInt64(0))
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row = iter.Next(ctx)
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if i+1 >= 1000 {
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require.True(t, row.IsEmpty())
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} else {
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require.Equal(t, int64(i+1), row.GetInt64(0))
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}
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}
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require.True(t, iter.Current(ctx).IsEmpty())
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iter.Close()
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}
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}
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