vitess.io/vitess@v0.16.2/go/vt/vtgate/executor_stream_test.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package vtgate
    18  
    19  import (
    20  	"testing"
    21  	"time"
    22  
    23  	querypb "vitess.io/vitess/go/vt/proto/query"
    24  
    25  	"vitess.io/vitess/go/cache"
    26  	"vitess.io/vitess/go/vt/discovery"
    27  	topodatapb "vitess.io/vitess/go/vt/proto/topodata"
    28  
    29  	"context"
    30  
    31  	"github.com/stretchr/testify/require"
    32  
    33  	"vitess.io/vitess/go/sqltypes"
    34  	_ "vitess.io/vitess/go/vt/vtgate/vindexes"
    35  	"vitess.io/vitess/go/vt/vttablet/sandboxconn"
    36  )
    37  
    38  func TestStreamSQLUnsharded(t *testing.T) {
    39  	executor, _, _, _ := createExecutorEnv()
    40  	logChan := QueryLogger.Subscribe("Test")
    41  	defer QueryLogger.Unsubscribe(logChan)
    42  
    43  	sql := "stream * from user_msgs"
    44  	result, err := executorStreamMessages(executor, sql)
    45  	require.NoError(t, err)
    46  	wantResult := sandboxconn.StreamRowResult
    47  	if !result.Equal(wantResult) {
    48  		t.Errorf("result: %+v, want %+v", result, wantResult)
    49  	}
    50  }
    51  
    52  func TestStreamSQLSharded(t *testing.T) {
    53  	cell := "aa"
    54  	hc := discovery.NewFakeHealthCheck(nil)
    55  	s := createSandbox("TestExecutor")
    56  	s.VSchema = executorVSchema
    57  	getSandbox(KsTestUnsharded).VSchema = unshardedVSchema
    58  	serv := newSandboxForCells([]string{cell})
    59  	resolver := newTestResolver(hc, serv, cell)
    60  	shards := []string{"-20", "20-40", "40-60", "60-80", "80-a0", "a0-c0", "c0-e0", "e0-"}
    61  	for _, shard := range shards {
    62  		_ = hc.AddTestTablet(cell, shard, 1, "TestExecutor", shard, topodatapb.TabletType_PRIMARY, true, 1, nil)
    63  	}
    64  	executor := NewExecutor(context.Background(), serv, cell, resolver, false, false, testBufferSize, cache.DefaultConfig, nil, false, querypb.ExecuteOptions_V3)
    65  
    66  	sql := "stream * from sharded_user_msgs"
    67  	result, err := executorStreamMessages(executor, sql)
    68  	require.NoError(t, err)
    69  	wantResult := &sqltypes.Result{
    70  		Fields: sandboxconn.SingleRowResult.Fields,
    71  		Rows: [][]sqltypes.Value{
    72  			sandboxconn.StreamRowResult.Rows[0],
    73  			sandboxconn.StreamRowResult.Rows[0],
    74  			sandboxconn.StreamRowResult.Rows[0],
    75  			sandboxconn.StreamRowResult.Rows[0],
    76  			sandboxconn.StreamRowResult.Rows[0],
    77  			sandboxconn.StreamRowResult.Rows[0],
    78  			sandboxconn.StreamRowResult.Rows[0],
    79  			sandboxconn.StreamRowResult.Rows[0],
    80  		},
    81  	}
    82  	if !result.Equal(wantResult) {
    83  		t.Errorf("result: %+v, want %+v", result, wantResult)
    84  	}
    85  }
    86  
    87  func executorStreamMessages(executor *Executor, sql string) (qr *sqltypes.Result, err error) {
    88  	results := make(chan *sqltypes.Result, 100)
    89  	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
    90  	defer cancel()
    91  	err = executor.StreamExecute(
    92  		ctx,
    93  		"TestExecuteStream",
    94  		NewSafeSession(primarySession),
    95  		sql,
    96  		nil,
    97  		func(qr *sqltypes.Result) error {
    98  			results <- qr
    99  			return nil
   100  		},
   101  	)
   102  	close(results)
   103  	if err != nil {
   104  		return nil, err
   105  	}
   106  	first := true
   107  	for r := range results {
   108  		if first {
   109  			qr = &sqltypes.Result{Fields: r.Fields}
   110  			first = false
   111  		}
   112  		qr.Rows = append(qr.Rows, r.Rows...)
   113  	}
   114  	return qr, nil
   115  }