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sqlsmith.go
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sqlsmith.go
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// Copyright 2019 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
package main
import (
"context"
"fmt"
"math/rand"
"os"
"path/filepath"
"strings"
"time"
"github.com/cockroachdb/cockroach/pkg/internal/sqlsmith"
"github.com/cockroachdb/cockroach/pkg/util/randutil"
)
func registerSQLSmith(r *testRegistry) {
setups := map[string]sqlsmith.Setup{
"empty": sqlsmith.Setups["empty"],
"seed": sqlsmith.Setups["seed"],
"rand-tables": sqlsmith.Setups["rand-tables"],
"tpch-sf1": func(r *rand.Rand) string {
return `RESTORE TABLE tpch.* FROM 'gs://cockroach-fixtures/workload/tpch/scalefactor=1/backup' WITH into_db = 'defaultdb';`
},
"tpcc": func(r *rand.Rand) string {
const version = "version=2.1.0,fks=true,interleaved=false,seed=1,warehouses=1"
var sb strings.Builder
for _, t := range []string{
"customer",
"district",
"history",
"item",
"new_order",
"order",
"order_line",
"stock",
"warehouse",
} {
fmt.Fprintf(&sb, "RESTORE TABLE tpcc.%s FROM 'gs://cockroach-fixtures/workload/tpcc/%[2]s/%[1]s' WITH into_db = 'defaultdb';\n", t, version)
}
return sb.String()
},
}
settings := map[string]sqlsmith.SettingFunc{
"default": sqlsmith.Settings["default"],
"no-mutations": sqlsmith.Settings["no-mutations"],
"no-ddl": sqlsmith.Settings["no-ddl"],
}
runSQLSmith := func(ctx context.Context, t *test, c *cluster, setupName, settingName string) {
// Set up a statement logger for easy reproduction. We only
// want to log successful statements and statements that
// produced a final error or panic.
smithLog, err := os.Create(filepath.Join(t.artifactsDir, "sqlsmith.log"))
if err != nil {
t.Fatalf("could not create sqlsmith.log: %v", err)
}
defer smithLog.Close()
logStmt := func(stmt string) {
stmt = strings.TrimSpace(stmt)
if stmt == "" {
return
}
fmt.Fprint(smithLog, stmt)
if !strings.HasSuffix(stmt, ";") {
fmt.Fprint(smithLog, ";")
}
fmt.Fprint(smithLog, "\n\n")
}
rng, seed := randutil.NewPseudoRand()
c.l.Printf("seed: %d", seed)
c.Put(ctx, cockroach, "./cockroach")
c.Start(ctx, t)
setupFunc, ok := setups[setupName]
if !ok {
t.Fatalf("unknown setup %s", setupName)
}
settingFunc, ok := settings[settingName]
if !ok {
t.Fatalf("unknown setting %s", settingName)
}
setup := setupFunc(rng)
setting := settingFunc(rng)
conn := c.Conn(ctx, 1)
t.Status("executing setup")
c.l.Printf("setup:\n%s", setup)
if _, err := conn.Exec(setup); err != nil {
t.Fatal(err)
} else {
logStmt(setup)
}
stmt := "SET experimental_enable_primary_key_changes = true;"
if _, err := conn.Exec(stmt); err != nil {
t.Fatal(err)
} else {
logStmt(stmt)
}
const timeout = time.Minute
setStmtTimeout := fmt.Sprintf("SET statement_timeout='%s';", timeout.String())
t.Status("setting statement_timeout")
c.l.Printf("statement timeout:\n%s", setStmtTimeout)
if _, err := conn.Exec(setStmtTimeout); err != nil {
t.Fatal(err)
}
logStmt(setStmtTimeout)
smither, err := sqlsmith.NewSmither(conn, rng, setting.Options...)
if err != nil {
t.Fatal(err)
}
t.Status("smithing")
until := time.After(t.spec.Timeout / 2)
done := ctx.Done()
for i := 1; ; i++ {
if i%10000 == 0 {
t.Status("smithing: ", i, " statements completed")
}
select {
case <-done:
return
case <-until:
return
default:
}
stmt := smither.Generate()
err := func() error {
done := make(chan error, 1)
go func(context.Context) {
// At the moment, CockroachDB doesn't support pgwire query
// cancellation which is needed for correct handling of context
// cancellation, so instead of using a context with timeout, we opt
// in for using CRDB's 'statement_timeout'.
// TODO(yuzefovich): once #41335 is implemented, go back to using a
// context with timeout.
_, err := conn.Exec(stmt)
if err == nil {
logStmt(stmt)
}
done <- err
}(ctx)
select {
case <-time.After(timeout * 2):
// SQLSmith generates queries that either perform full table scans of
// large tables or backup/restore operations that timeout. These
// should not cause an issue to be raised, as they most likely are
// just timing out.
c.l.Printf("query timed out, but did not cancel execution:\n%s;", stmt)
return nil
case err := <-done:
return err
}
}()
if err != nil {
es := err.Error()
if strings.Contains(es, "internal error") {
logStmt(stmt)
t.Fatalf("error: %s\nstmt:\n%s;", err, stmt)
} else if strings.Contains(es, "communication error") {
// A communication error can be because
// a non-gateway node has crashed.
logStmt(stmt)
t.Fatalf("error: %s\nstmt:\n%s;", err, stmt)
}
// Ignore other errors because they happen so
// frequently (due to sqlsmith not crafting
// executable queries 100% of the time) and are
// never interesting.
}
// Ping the gateway to make sure it didn't crash.
if err := conn.PingContext(ctx); err != nil {
logStmt(stmt)
t.Fatalf("ping: %v\nprevious sql:\n%s;", err, stmt)
}
}
}
register := func(setup, setting string) {
r.Add(testSpec{
Name: fmt.Sprintf("sqlsmith/setup=%s/setting=%s", setup, setting),
// NB: sqlsmith failures should never block a release.
Owner: OwnerSQLExec,
Cluster: makeClusterSpec(4),
MinVersion: "v20.1.0",
Timeout: time.Minute * 20,
Run: func(ctx context.Context, t *test, c *cluster) {
runSQLSmith(ctx, t, c, setup, setting)
},
})
}
for setup := range setups {
for setting := range settings {
register(setup, setting)
}
}
setups["seed-vec"] = sqlsmith.Setups["seed-vec"]
settings["ddl-nodrop"] = sqlsmith.Settings["ddl-nodrop"]
settings["vec"] = sqlsmith.SettingVectorize
register("seed-vec", "vec")
register("tpcc", "ddl-nodrop")
}