Beispiel #1
0
// ShowColumns of a table.
// Privileges: None.
//   Notes: postgres does not have a SHOW COLUMNS statement.
//          mysql only returns columns you have privileges on.
func (p *planner) ShowColumns(n *parser.ShowColumns) (planNode, error) {
	desc, err := p.getTableDesc(n.Table)
	if err != nil {
		return nil, err
	}
	if desc == nil {
		return nil, sqlbase.NewUndefinedTableError(n.Table.String())
	}
	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Field", Typ: parser.TypeString},
			{Name: "Type", Typ: parser.TypeString},
			{Name: "Null", Typ: parser.TypeBool},
			{Name: "Default", Typ: parser.TypeString},
		},
	}
	for i, col := range desc.Columns {
		defaultExpr := parser.Datum(parser.DNull)
		if e := desc.Columns[i].DefaultExpr; e != nil {
			defaultExpr = parser.NewDString(*e)
		}
		v.rows = append(v.rows, []parser.Datum{
			parser.NewDString(desc.Columns[i].Name),
			parser.NewDString(col.Type.SQLString()),
			parser.MakeDBool(parser.DBool(desc.Columns[i].Nullable)),
			defaultExpr,
		})
	}
	return v, nil
}
Beispiel #2
0
// SetUIData is an endpoint that stores the given key/value pairs in the
// system.ui table. See GetUIData for more details on semantics.
func (s *adminServer) SetUIData(ctx context.Context, req *SetUIDataRequest) (*SetUIDataResponse, error) {
	if len(req.KeyValues) == 0 {
		return nil, grpc.Errorf(codes.InvalidArgument, "KeyValues cannot be empty")
	}

	session := sql.NewSession(sql.SessionArgs{User: s.getUser(req)}, s.server.sqlExecutor, nil)

	for key, val := range req.KeyValues {
		// Do an upsert of the key. We update each key in a separate transaction to
		// avoid long-running transactions and possible deadlocks.
		br := s.server.sqlExecutor.ExecuteStatements(ctx, session, "BEGIN;", nil)
		if err := s.checkQueryResults(br.ResultList, 1); err != nil {
			return nil, s.serverError(err)
		}

		// See if the key already exists.
		resp, err := s.getUIData(session, s.getUser(req), []string{key})
		if err != nil {
			return nil, s.serverError(err)
		}
		_, alreadyExists := resp.KeyValues[key]

		// INSERT or UPDATE as appropriate.
		if alreadyExists {
			query := "UPDATE system.ui SET value = $1, lastUpdated = NOW() WHERE key = $2; COMMIT;"
			params := []parser.Datum{
				parser.NewDString(string(val)), // $1
				parser.NewDString(key),         // $2
			}
			r := s.server.sqlExecutor.ExecuteStatements(ctx, session, query, params)
			if err := s.checkQueryResults(r.ResultList, 2); err != nil {
				return nil, s.serverError(err)
			}
			if a, e := r.ResultList[0].RowsAffected, 1; a != e {
				return nil, s.serverErrorf("rows affected %d != expected %d", a, e)
			}
		} else {
			query := "INSERT INTO system.ui (key, value, lastUpdated) VALUES ($1, $2, NOW()); COMMIT;"
			params := []parser.Datum{
				parser.NewDString(key),               // $1
				parser.NewDBytes(parser.DBytes(val)), // $2
			}
			r := s.server.sqlExecutor.ExecuteStatements(ctx, session, query, params)
			if err := s.checkQueryResults(r.ResultList, 2); err != nil {
				return nil, s.serverError(err)
			}
			if a, e := r.ResultList[0].RowsAffected, 1; a != e {
				return nil, s.serverErrorf("rows affected %d != expected %d", a, e)
			}
		}
	}

	return &SetUIDataResponse{}, nil
}
Beispiel #3
0
// ShowIndex returns all the indexes for a table.
// Privileges: Any privilege on table.
//   Notes: postgres does not have a SHOW INDEXES statement.
//          mysql requires some privilege for any column.
func (p *planner) ShowIndex(n *parser.ShowIndex) (planNode, error) {
	tn, err := n.Table.NormalizeWithDatabaseName(p.session.Database)
	if err != nil {
		return nil, err
	}

	desc, err := p.mustGetTableDesc(tn)
	if err != nil {
		return nil, err
	}
	if err := p.anyPrivilege(desc); err != nil {
		return nil, err
	}

	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Table", Typ: parser.TypeString},
			{Name: "Name", Typ: parser.TypeString},
			{Name: "Unique", Typ: parser.TypeBool},
			{Name: "Seq", Typ: parser.TypeInt},
			{Name: "Column", Typ: parser.TypeString},
			{Name: "Direction", Typ: parser.TypeString},
			{Name: "Storing", Typ: parser.TypeBool},
		},
	}

	appendRow := func(index sqlbase.IndexDescriptor, colName string, sequence int,
		direction string, isStored bool) {
		v.rows = append(v.rows, []parser.Datum{
			parser.NewDString(tn.Table()),
			parser.NewDString(index.Name),
			parser.MakeDBool(parser.DBool(index.Unique)),
			parser.NewDInt(parser.DInt(sequence)),
			parser.NewDString(colName),
			parser.NewDString(direction),
			parser.MakeDBool(parser.DBool(isStored)),
		})
	}

	for _, index := range append([]sqlbase.IndexDescriptor{desc.PrimaryIndex}, desc.Indexes...) {
		sequence := 1
		for i, col := range index.ColumnNames {
			appendRow(index, col, sequence, index.ColumnDirections[i].String(), false)
			sequence++
		}
		for _, col := range index.StoreColumnNames {
			appendRow(index, col, sequence, "N/A", true)
			sequence++
		}
	}
	return v, nil
}
Beispiel #4
0
// ShowTables returns all the tables.
// Privileges: None.
//   Notes: postgres does not have a SHOW TABLES statement.
//          mysql only returns tables you have privileges on.
func (p *planner) ShowTables(n *parser.ShowTables) (planNode, error) {
	// TODO(pmattis): This could be implemented as:
	//
	//   SELECT name FROM system.namespace
	//     WHERE parentID = (SELECT id FROM system.namespace
	//                       WHERE parentID = 0 AND name = <database>)

	name := n.Name
	if name == nil {
		if p.session.Database == "" {
			return nil, errNoDatabase
		}
		name = &parser.QualifiedName{Base: parser.Name(p.session.Database)}
	}
	dbDesc, err := p.getDatabaseDesc(string(name.Base))
	if err != nil {
		return nil, err
	}
	if dbDesc == nil {
		return nil, sqlbase.NewUndefinedDatabaseError(string(name.Base))
	}

	tableNames, err := p.getTableNames(dbDesc)
	if err != nil {
		return nil, err
	}
	v := &valuesNode{columns: []ResultColumn{{Name: "Table", Typ: parser.TypeString}}}
	for _, name := range tableNames {
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(name.Table())})
	}

	return v, nil
}
Beispiel #5
0
// queryNamespaceID queries for the ID of the namespace with the given name and
// parent ID.
func (s *adminServer) queryNamespaceID(
	session *sql.Session, parentID sqlbase.ID, name string,
) (sqlbase.ID, error) {
	const query = `SELECT id FROM system.namespace WHERE parentID = $1 AND name = $2`
	params := parser.NewPlaceholderInfo()
	params.SetValue(`1`, parser.NewDInt(parser.DInt(parentID)))
	params.SetValue(`2`, parser.NewDString(name))
	r := s.server.sqlExecutor.ExecuteStatements(session, query, params)
	if err := s.checkQueryResults(r.ResultList, 1); err != nil {
		return 0, err
	}

	result := r.ResultList[0]
	if len(result.Rows) == 0 {
		return 0, errors.Errorf("namespace %s with ParentID %d not found", name, parentID)
	}

	var id int64
	scanner := resultScanner{}
	err := scanner.ScanIndex(result.Rows[0], 0, &id)
	if err != nil {
		return 0, err
	}

	return sqlbase.ID(id), nil
}
Beispiel #6
0
// ShowTables returns all the tables.
// Privileges: None.
//   Notes: postgres does not have a SHOW TABLES statement.
//          mysql only returns tables you have privileges on.
func (p *planner) ShowTables(n *parser.ShowTables) (planNode, error) {
	// TODO(pmattis): This could be implemented as:
	//
	//   SELECT name FROM system.namespace
	//     WHERE parentID = (SELECT id FROM system.namespace
	//                       WHERE parentID = 0 AND name = <database>)
	name := p.session.Database
	if n.Database != "" {
		name = string(n.Database)
	}
	if name == "" {
		return nil, errNoDatabase
	}

	dbDesc, err := p.mustGetDatabaseDesc(name)
	if err != nil {
		return nil, err
	}

	tableNames, err := p.getTableNames(dbDesc)
	if err != nil {
		return nil, err
	}
	v := &valuesNode{columns: []ResultColumn{{Name: "Table", Typ: parser.TypeString}}}
	for _, name := range tableNames {
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(name.Table())})
	}

	return v, nil
}
Beispiel #7
0
// ShowGrants returns grant details for the specified objects and users.
// TODO(marc): implement no targets (meaning full scan).
// Privileges: None.
//   Notes: postgres does not have a SHOW GRANTS statement.
//          mysql only returns the user's privileges.
func (p *planner) ShowGrants(n *parser.ShowGrants) (planNode, error) {
	if n.Targets == nil {
		return nil, util.Errorf("TODO(marc): implement SHOW GRANT with no targets")
	}
	descriptors, err := p.getDescriptorsFromTargetList(*n.Targets)
	if err != nil {
		return nil, err
	}

	objectType := "Database"
	if n.Targets.Tables != nil {
		objectType = "Table"
	}

	v := &valuesNode{
		columns: []ResultColumn{
			{Name: objectType, Typ: parser.TypeString},
			{Name: "User", Typ: parser.TypeString},
			{Name: "Privileges", Typ: parser.TypeString},
		},
	}
	var wantedUsers map[string]struct{}
	if len(n.Grantees) != 0 {
		wantedUsers = make(map[string]struct{})
	}
	for _, u := range n.Grantees {
		wantedUsers[u] = struct{}{}
	}

	for _, descriptor := range descriptors {
		userPrivileges := descriptor.GetPrivileges().Show()
		for _, userPriv := range userPrivileges {
			if wantedUsers != nil {
				if _, ok := wantedUsers[userPriv.User]; !ok {
					continue
				}
			}
			v.rows = append(v.rows, []parser.Datum{
				parser.NewDString(descriptor.GetName()),
				parser.NewDString(userPriv.User),
				parser.NewDString(userPriv.Privileges),
			})
		}
	}
	return v, nil
}
Beispiel #8
0
// golangFillQueryArguments populates the placeholder map with
// types and values from an array of Go values.
// TODO: This does not support arguments of the SQL 'Date' type, as there is not
// an equivalent type in Go's standard library. It's not currently needed by any
// of our internal tables.
func golangFillQueryArguments(pinfo *parser.PlaceholderInfo, args []interface{}) {
	pinfo.Clear()

	for i, arg := range args {
		k := fmt.Sprint(i + 1)
		if arg == nil {
			pinfo.SetValue(k, parser.DNull)
			continue
		}

		// A type switch to handle a few explicit types with special semantics:
		// - Datums are passed along as is.
		// - Time datatypes get special representation in the database.
		var d parser.Datum
		switch t := arg.(type) {
		case parser.Datum:
			d = t
		case time.Time:
			d = parser.MakeDTimestamp(t, time.Microsecond)
		case time.Duration:
			d = &parser.DInterval{Duration: duration.Duration{Nanos: t.Nanoseconds()}}
		case *inf.Dec:
			dd := &parser.DDecimal{}
			dd.Set(t)
			d = dd
		}
		if d == nil {
			// Handle all types which have an underlying type that can be stored in the
			// database.
			// Note: if this reflection becomes a performance concern in the future,
			// commonly used types could be added explicitly into the type switch above
			// for a performance gain.
			val := reflect.ValueOf(arg)
			switch val.Kind() {
			case reflect.Bool:
				d = parser.MakeDBool(parser.DBool(val.Bool()))
			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
				d = parser.NewDInt(parser.DInt(val.Int()))
			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
				d = parser.NewDInt(parser.DInt(val.Uint()))
			case reflect.Float32, reflect.Float64:
				d = parser.NewDFloat(parser.DFloat(val.Float()))
			case reflect.String:
				d = parser.NewDString(val.String())
			case reflect.Slice:
				// Handle byte slices.
				if val.Type().Elem().Kind() == reflect.Uint8 {
					d = parser.NewDBytes(parser.DBytes(val.Bytes()))
				}
			}
			if d == nil {
				panic(fmt.Sprintf("unexpected type %T", arg))
			}
		}
		pinfo.SetValue(k, d)
	}
}
Beispiel #9
0
// Events is an endpoint that returns the latest event log entries, with the following
// optional URL parameters:
//
// type=STRING  returns events with this type (e.g. "create_table")
// targetID=INT returns events for that have this targetID
func (s *adminServer) Events(ctx context.Context, req *serverpb.EventsRequest) (*serverpb.EventsResponse, error) {
	args := sql.SessionArgs{User: s.getUser(req)}
	session := sql.NewSession(ctx, args, s.server.sqlExecutor, nil)

	// Execute the query.
	q := makeSQLQuery()
	q.Append("SELECT timestamp, eventType, targetID, reportingID, info, uniqueID ")
	q.Append("FROM system.eventlog ")
	q.Append("WHERE true ") // This simplifies the WHERE clause logic below.
	if len(req.Type) > 0 {
		q.Append("AND eventType = $ ", parser.NewDString(req.Type))
	}
	if req.TargetId > 0 {
		q.Append("AND targetID = $ ", parser.NewDInt(parser.DInt(req.TargetId)))
	}
	q.Append("ORDER BY timestamp DESC ")
	q.Append("LIMIT $", parser.NewDInt(parser.DInt(apiEventLimit)))
	if len(q.Errors()) > 0 {
		return nil, s.serverErrors(q.Errors())
	}
	r := s.server.sqlExecutor.ExecuteStatements(session, q.String(), q.QueryArguments())
	if err := s.checkQueryResults(r.ResultList, 1); err != nil {
		return nil, s.serverError(err)
	}

	// Marshal response.
	var resp serverpb.EventsResponse
	scanner := makeResultScanner(r.ResultList[0].Columns)
	for _, row := range r.ResultList[0].Rows {
		var event serverpb.EventsResponse_Event
		var ts time.Time
		if err := scanner.ScanIndex(row, 0, &ts); err != nil {
			return nil, err
		}
		event.Timestamp = serverpb.EventsResponse_Event_Timestamp{Sec: ts.Unix(), Nsec: uint32(ts.Nanosecond())}
		if err := scanner.ScanIndex(row, 1, &event.EventType); err != nil {
			return nil, err
		}
		if err := scanner.ScanIndex(row, 2, &event.TargetID); err != nil {
			return nil, err
		}
		if err := scanner.ScanIndex(row, 3, &event.ReportingID); err != nil {
			return nil, err
		}
		if err := scanner.ScanIndex(row, 4, &event.Info); err != nil {
			return nil, err
		}
		if err := scanner.ScanIndex(row, 5, &event.UniqueID); err != nil {
			return nil, err
		}

		resp.Events = append(resp.Events, event)
	}
	return &resp, nil
}
Beispiel #10
0
// Arg implements the parser.Args interface.
// TODO: This does not support arguments of the SQL 'Date' type, as there is not
// an equivalent type in Go's standard library. It's not currently needed by any
// of our internal tables.
func (gp golangParameters) Arg(name string) (parser.Datum, bool) {
	i, err := processPositionalArgument(name)
	if err != nil {
		return nil, false
	}
	if i < 1 || int(i) > len(gp) {
		return nil, false
	}
	arg := gp[i-1]
	if arg == nil {
		return parser.DNull, true
	}

	// A type switch to handle a few explicit types with special semantics.
	switch t := arg.(type) {
	// Datums are passed along as is.
	case parser.Datum:
		return t, true
	// Time datatypes get special representation in the database.
	case time.Time:
		return parser.MakeDTimestamp(t, time.Microsecond), true
	case time.Duration:
		return &parser.DInterval{Duration: duration.Duration{Nanos: t.Nanoseconds()}}, true
	case *inf.Dec:
		dd := &parser.DDecimal{}
		dd.Set(t)
		return dd, true
	}

	// Handle all types which have an underlying type that can be stored in the
	// database.
	// Note: if this reflection becomes a performance concern in the future,
	// commonly used types could be added explicitly into the type switch above
	// for a performance gain.
	val := reflect.ValueOf(arg)
	switch val.Kind() {
	case reflect.Bool:
		return parser.MakeDBool(parser.DBool(val.Bool())), true
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return parser.NewDInt(parser.DInt(val.Int())), true
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return parser.NewDInt(parser.DInt(val.Uint())), true
	case reflect.Float32, reflect.Float64:
		return parser.NewDFloat(parser.DFloat(val.Float())), true
	case reflect.String:
		return parser.NewDString(val.String()), true
	case reflect.Slice:
		// Handle byte slices.
		if val.Type().Elem().Kind() == reflect.Uint8 {
			return parser.NewDBytes(parser.DBytes(val.Bytes())), true
		}
	}

	panic(fmt.Sprintf("unexpected type %T", arg))
}
Beispiel #11
0
// Show a session-local variable name.
func (p *planner) Show(n *parser.Show) (planNode, error) {
	name := strings.ToUpper(n.Name)

	v := &valuesNode{columns: []ResultColumn{{Name: name, Typ: parser.TypeString}}}

	switch name {
	case `DATABASE`:
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(p.session.Database)})
	case `TIME ZONE`:
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(p.session.Location.String())})
	case `SYNTAX`:
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(parser.Syntax(p.session.Syntax).String())})
	case `DEFAULT_TRANSACTION_ISOLATION`:
		level := p.session.DefaultIsolationLevel.String()
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(level)})
	case `TRANSACTION ISOLATION LEVEL`:
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(p.txn.Proto.Isolation.String())})
	case `TRANSACTION PRIORITY`:
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(p.txn.UserPriority.String())})
	default:
		return nil, fmt.Errorf("unknown variable: %q", name)
	}

	return v, nil
}
Beispiel #12
0
// ShowColumns of a table.
// Privileges: Any privilege on table.
//   Notes: postgres does not have a SHOW COLUMNS statement.
//          mysql only returns columns you have privileges on.
func (p *planner) ShowColumns(n *parser.ShowColumns) (planNode, error) {
	tn, err := n.Table.NormalizeWithDatabaseName(p.session.Database)
	if err != nil {
		return nil, err
	}

	desc, err := p.mustGetTableDesc(tn)
	if err != nil {
		return nil, err
	}
	if err := p.anyPrivilege(desc); err != nil {
		return nil, err
	}

	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Field", Typ: parser.TypeString},
			{Name: "Type", Typ: parser.TypeString},
			{Name: "Null", Typ: parser.TypeBool},
			{Name: "Default", Typ: parser.TypeString},
		},
	}

	for i, col := range desc.Columns {
		defaultExpr := parser.DNull
		if e := desc.Columns[i].DefaultExpr; e != nil {
			defaultExpr = parser.NewDString(*e)
		}
		v.rows = append(v.rows, []parser.Datum{
			parser.NewDString(desc.Columns[i].Name),
			parser.NewDString(col.Type.SQLString()),
			parser.MakeDBool(parser.DBool(desc.Columns[i].Nullable)),
			defaultExpr,
		})
	}
	return v, nil
}
Beispiel #13
0
// ShowDatabases returns all the databases.
// Privileges: None.
//   Notes: postgres does not have a "show databases"
//          mysql has a "SHOW DATABASES" permission, but we have no system-level permissions.
func (p *planner) ShowDatabases(n *parser.ShowDatabases) (planNode, error) {
	// TODO(pmattis): This could be implemented as:
	//
	//   SELECT id FROM system.namespace WHERE parentID = 0

	prefix := sqlbase.MakeNameMetadataKey(keys.RootNamespaceID, "")
	sr, err := p.txn.Scan(prefix, prefix.PrefixEnd(), 0)
	if err != nil {
		return nil, err
	}
	v := &valuesNode{columns: []ResultColumn{{Name: "Database", Typ: parser.TypeString}}}
	for db := range virtualSchemaMap {
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(db)})
	}
	for _, row := range sr {
		_, name, err := encoding.DecodeUnsafeStringAscending(
			bytes.TrimPrefix(row.Key, prefix), nil)
		if err != nil {
			return nil, err
		}
		v.rows = append(v.rows, []parser.Datum{parser.NewDString(name)})
	}
	return v, nil
}
Beispiel #14
0
// getUIData returns the values and timestamps for the given UI keys. Keys
// that are not found will not be returned.
func (s *adminServer) getUIData(session *sql.Session, user string, keys []string) (*serverpb.GetUIDataResponse, error) {
	if len(keys) == 0 {
		return &serverpb.GetUIDataResponse{}, nil
	}

	// Query database.
	query := makeSQLQuery()
	query.Append("SELECT key, value, lastUpdated FROM system.ui WHERE key IN (")
	for i, key := range keys {
		if i != 0 {
			query.Append(",")
		}
		query.Append("$", parser.NewDString(key))
	}
	query.Append(");")
	if err := query.Errors(); err != nil {
		return nil, s.serverErrorf("error constructing query: %v", err)
	}
	r := s.server.sqlExecutor.ExecuteStatements(context.Background(),
		session, query.String(), query.QueryArguments())
	if err := s.checkQueryResults(r.ResultList, 1); err != nil {
		return nil, s.serverError(err)
	}

	// Marshal results.
	resp := serverpb.GetUIDataResponse{KeyValues: make(map[string]serverpb.GetUIDataResponse_Value)}
	for _, row := range r.ResultList[0].Rows {
		dKey, ok := row.Values[0].(*parser.DString)
		if !ok {
			return nil, s.serverErrorf("unexpected type for UI key: %T", row.Values[0])
		}
		dValue, ok := row.Values[1].(*parser.DBytes)
		if !ok {
			return nil, s.serverErrorf("unexpected type for UI value: %T", row.Values[1])
		}
		dLastUpdated, ok := row.Values[2].(*parser.DTimestamp)
		if !ok {
			return nil, s.serverErrorf("unexpected type for UI lastUpdated: %T", row.Values[2])
		}

		resp.KeyValues[string(*dKey)] = serverpb.GetUIDataResponse_Value{
			Value:       []byte(*dValue),
			LastUpdated: serverpb.GetUIDataResponse_Timestamp{Sec: dLastUpdated.Unix(), Nsec: uint32(dLastUpdated.Nanosecond())},
		}
	}
	return &resp, nil
}
Beispiel #15
0
// RandDatum generates a random Datum of the given type.
// If null is true, the datum can be DNull.
func RandDatum(rng *rand.Rand, typ ColumnType_Kind, null bool) parser.Datum {
	if null && rng.Intn(10) == 0 {
		return parser.DNull
	}
	switch typ {
	case ColumnType_BOOL:
		return parser.MakeDBool(rng.Intn(2) == 1)
	case ColumnType_INT:
		return parser.NewDInt(parser.DInt(rng.Int63()))
	case ColumnType_FLOAT:
		return parser.NewDFloat(parser.DFloat(rng.NormFloat64()))
	case ColumnType_DECIMAL:
		d := &parser.DDecimal{}
		d.Dec.SetScale(inf.Scale(rng.Intn(40) - 20))
		d.Dec.SetUnscaled(rng.Int63())
		return d
	case ColumnType_DATE:
		return parser.NewDDate(parser.DDate(rng.Intn(10000)))
	case ColumnType_TIMESTAMP:
		return &parser.DTimestamp{Time: time.Unix(rng.Int63n(1000000), rng.Int63n(1000000))}
	case ColumnType_INTERVAL:
		return &parser.DInterval{Duration: duration.Duration{Months: rng.Int63n(1000),
			Days:  rng.Int63n(1000),
			Nanos: rng.Int63n(1000000),
		}}
	case ColumnType_STRING:
		// Generate a random ASCII string.
		p := make([]byte, rng.Intn(10))
		for i := range p {
			p[i] = byte(1 + rng.Intn(127))
		}
		return parser.NewDString(string(p))
	case ColumnType_BYTES:
		p := make([]byte, rng.Intn(10))
		_, _ = rng.Read(p)
		return parser.NewDBytes(parser.DBytes(p))
	case ColumnType_TIMESTAMPTZ:
		return &parser.DTimestampTZ{Time: time.Unix(rng.Int63n(1000000), rng.Int63n(1000000))}
	default:
		panic(fmt.Sprintf("invalid type %s", typ))
	}
}
Beispiel #16
0
func makePrefixRange(prefix parser.DString, datum parser.TypedExpr, complete bool) parser.TypedExpr {
	if complete {
		return parser.NewTypedComparisonExpr(
			parser.EQ,
			datum,
			&prefix,
		)
	}
	if len(prefix) == 0 {
		return parser.MakeDBool(true)
	}
	return parser.NewTypedAndExpr(
		parser.NewTypedComparisonExpr(
			parser.GE,
			datum,
			&prefix,
		),
		parser.NewTypedComparisonExpr(
			parser.LT,
			datum,
			parser.NewDString(string(roachpb.Key(prefix).PrefixEnd())),
		),
	)
}
Beispiel #17
0
func dumpTable(w io.Writer, conn *sqlConn, origDBName, origTableName string) error {
	const limit = 100

	// Escape names since they can't be used in placeholders.
	dbname := parser.Name(origDBName).String()
	tablename := parser.Name(origTableName).String()

	if err := conn.Exec(fmt.Sprintf("SET DATABASE = %s", dbname), nil); err != nil {
		return err
	}

	// Fetch all table metadata in a transaction and its time to guarantee it
	// doesn't change between the various SHOW statements.
	if err := conn.Exec("BEGIN", nil); err != nil {
		return err
	}

	vals, err := conn.QueryRow("SELECT cluster_logical_timestamp()::int", nil)
	if err != nil {
		return err
	}
	clusterTSStart := vals[0].(int64)
	clusterTS := time.Unix(0, clusterTSStart).Format(time.RFC3339Nano)

	// Fetch table descriptor.
	vals, err = conn.QueryRow(`
		SELECT descriptor
		FROM system.descriptor
		JOIN system.namespace tables
			ON tables.id = descriptor.id
		JOIN system.namespace dbs
			ON dbs.id = tables.parentid
		WHERE tables.name = $1 AND dbs.name = $2`,
		[]driver.Value{origTableName, origDBName})
	if err == io.EOF {
		return errors.Errorf("unknown database or table %s.%s", origTableName, origDBName)
	} else if err != nil {
		return err
	}
	b := vals[0].([]byte)
	var desc sqlbase.Descriptor
	if err := proto.Unmarshal(b, &desc); err != nil {
		return err
	}
	table := desc.GetTable()
	if table == nil {
		return errors.New("internal error: expected table descriptor")
	}

	coltypes := make(map[string]string)
	for _, c := range table.Columns {
		coltypes[c.Name] = c.Type.SQLString()
	}

	primaryIndex := table.PrimaryIndex.Name
	index := table.PrimaryIndex.ColumnNames
	indexes := strings.Join(index, ", ")

	// Build the SELECT query.
	var sbuf bytes.Buffer
	fmt.Fprintf(&sbuf, "SELECT %s, * FROM %s@%s AS OF SYSTEM TIME '%s'", indexes, tablename, primaryIndex, clusterTS)

	var wbuf bytes.Buffer
	fmt.Fprintf(&wbuf, " WHERE ROW (%s) > ROW (", indexes)
	for i := range index {
		if i > 0 {
			wbuf.WriteString(", ")
		}
		fmt.Fprintf(&wbuf, "$%d", i+1)
	}
	wbuf.WriteString(")")
	// No WHERE clause first time, so add a place to inject it.
	fmt.Fprintf(&sbuf, "%%s ORDER BY %s LIMIT %d", indexes, limit)
	bs := sbuf.String()

	vals, err = conn.QueryRow(fmt.Sprintf("SHOW CREATE TABLE %s", tablename), nil)
	if err != nil {
		return err
	}
	create := vals[1].([]byte)
	if _, err := w.Write(create); err != nil {
		return err
	}
	if _, err := w.Write([]byte(";\n")); err != nil {
		return err
	}

	if err := conn.Exec("COMMIT", nil); err != nil {
		return err
	}

	// pk holds the last values of the fetched primary keys
	var pk []driver.Value
	q := fmt.Sprintf(bs, "")
	for {
		rows, err := conn.Query(q, pk)
		if err != nil {
			return err
		}
		cols := rows.Columns()
		pkcols := cols[:len(index)]
		cols = cols[len(index):]
		inserts := make([][]string, 0, limit)
		i := 0
		for i < limit {
			vals := make([]driver.Value, len(cols)+len(pkcols))
			if err := rows.Next(vals); err == io.EOF {
				break
			} else if err != nil {
				return err
			}
			if pk == nil {
				q = fmt.Sprintf(bs, wbuf.String())
			}
			pk = vals[:len(index)]
			vals = vals[len(index):]
			ivals := make([]string, len(vals))
			// Values need to be correctly encoded for INSERT statements in a text file.
			for si, sv := range vals {
				switch t := sv.(type) {
				case nil:
					ivals[si] = "NULL"
				case bool:
					ivals[si] = parser.MakeDBool(parser.DBool(t)).String()
				case int64:
					ivals[si] = parser.NewDInt(parser.DInt(t)).String()
				case float64:
					ivals[si] = parser.NewDFloat(parser.DFloat(t)).String()
				case []byte:
					switch ct := coltypes[cols[si]]; ct {
					case "INTERVAL":
						ivals[si] = fmt.Sprintf("'%s'", t)
					case "DECIMAL":
						ivals[si] = fmt.Sprintf("%s", t)
					default:
						// STRING and BYTES types can have optional length suffixes, so only examine
						// the prefix of the type.
						if strings.HasPrefix(coltypes[cols[si]], "STRING") {
							ivals[si] = parser.NewDString(string(t)).String()
						} else if strings.HasPrefix(coltypes[cols[si]], "BYTES") {
							ivals[si] = parser.NewDBytes(parser.DBytes(t)).String()
						} else {
							panic(errors.Errorf("unknown []byte type: %s, %v: %s", t, cols[si], coltypes[cols[si]]))
						}
					}
				case time.Time:
					var d parser.Datum
					ct := coltypes[cols[si]]
					switch ct {
					case "DATE":
						d = parser.NewDDateFromTime(t, time.UTC)
					case "TIMESTAMP":
						d = parser.MakeDTimestamp(t, time.Nanosecond)
					case "TIMESTAMP WITH TIME ZONE":
						d = parser.MakeDTimestampTZ(t, time.Nanosecond)
					default:
						panic(errors.Errorf("unknown timestamp type: %s, %v: %s", t, cols[si], coltypes[cols[si]]))
					}
					ivals[si] = fmt.Sprintf("'%s'", d)
				default:
					panic(errors.Errorf("unknown field type: %T (%s)", t, cols[si]))
				}
			}
			inserts = append(inserts, ivals)
			i++
		}
		for si, sv := range pk {
			b, ok := sv.([]byte)
			if ok && strings.HasPrefix(coltypes[pkcols[si]], "STRING") {
				// Primary key strings need to be converted to a go string, but not SQL
				// encoded since they aren't being written to a text file.
				pk[si] = string(b)
			}
		}
		if err := rows.Close(); err != nil {
			return err
		}
		if i == 0 {
			break
		}
		fmt.Fprintf(w, "\nINSERT INTO %s VALUES", tablename)
		for idx, values := range inserts {
			if idx > 0 {
				fmt.Fprint(w, ",")
			}
			fmt.Fprint(w, "\n\t(")
			for vi, v := range values {
				if vi > 0 {
					fmt.Fprint(w, ", ")
				}
				fmt.Fprint(w, v)
			}
			fmt.Fprint(w, ")")
		}
		fmt.Fprintln(w, ";")
		if i < limit {
			break
		}
	}
	return nil
}
func dStringOrNull(s *string) parser.Datum {
	if s == nil {
		return parser.DNull
	}
	return parser.NewDString(*s)
}
	"github.com/pkg/errors"
)

var informationSchema = virtualSchema{
	name: "information_schema",
	tables: []virtualSchemaTable{
		informationSchemaColumnsTable,
		informationSchemaTablesTable,
	},
}

var (
	// defString is used as the value for columns included in the sql standard
	// of information_schema that don't make sense for CockroachDB. This is
	// identical to the behavior of MySQL.
	defString = parser.NewDString("def")

	// information_schema was defined before the BOOLEAN data type was added to
	// the SQL specification. Because of this, boolean values are represented
	// as strings.
	yesString = parser.NewDString("YES")
	noString  = parser.NewDString("NO")
)

func yesOrNoDatum(b bool) parser.Datum {
	if b {
		return yesString
	}
	return noString
}
Beispiel #20
0
func TestValues(t *testing.T) {
	defer leaktest.AfterTest(t)()

	p := makePlanner()

	vInt := int64(5)
	vNum := 3.14159
	vStr := "two furs one cub"
	vBool := true

	unsupp := &parser.RangeCond{}

	intVal := func(v int64) *parser.NumVal {
		return &parser.NumVal{Value: constant.MakeInt64(v)}
	}
	floatVal := func(f float64) *parser.CastExpr {
		return &parser.CastExpr{
			Expr: &parser.NumVal{Value: constant.MakeFloat64(f)},
			Type: &parser.FloatColType{},
		}
	}
	asRow := func(datums ...parser.Datum) []parser.DTuple {
		return []parser.DTuple{datums}
	}

	makeValues := func(tuples ...*parser.Tuple) *parser.ValuesClause {
		return &parser.ValuesClause{Tuples: tuples}
	}
	makeTuple := func(exprs ...parser.Expr) *parser.Tuple {
		return &parser.Tuple{Exprs: exprs}
	}

	testCases := []struct {
		stmt *parser.ValuesClause
		rows []parser.DTuple
		ok   bool
	}{
		{
			makeValues(makeTuple(intVal(vInt))),
			asRow(parser.NewDInt(parser.DInt(vInt))),
			true,
		},
		{
			makeValues(makeTuple(intVal(vInt), intVal(vInt))),
			asRow(parser.NewDInt(parser.DInt(vInt)), parser.NewDInt(parser.DInt(vInt))),
			true,
		},
		{
			makeValues(makeTuple(floatVal(vNum))),
			asRow(parser.NewDFloat(parser.DFloat(vNum))),
			true,
		},
		{
			makeValues(makeTuple(parser.NewDString(vStr))),
			asRow(parser.NewDString(vStr)),
			true,
		},
		{
			makeValues(makeTuple(parser.NewDBytes(parser.DBytes(vStr)))),
			asRow(parser.NewDBytes(parser.DBytes(vStr))),
			true,
		},
		{
			makeValues(makeTuple(parser.MakeDBool(parser.DBool(vBool)))),
			asRow(parser.MakeDBool(parser.DBool(vBool))),
			true,
		},
		{
			makeValues(makeTuple(unsupp)),
			nil,
			false,
		},
	}

	for i, tc := range testCases {
		plan, err := func() (_ planNode, err error) {
			defer func() {
				if r := recover(); r != nil {
					err = errors.Errorf("%v", r)
				}
			}()
			return p.ValuesClause(tc.stmt, nil)
		}()
		if err == nil != tc.ok {
			t.Errorf("%d: error_expected=%t, but got error %v", i, tc.ok, err)
		}
		if plan != nil {
			if err := plan.expandPlan(); err != nil {
				t.Errorf("%d: unexpected error in expandPlan: %v", i, err)
				continue
			}
			if err := plan.Start(); err != nil {
				t.Errorf("%d: unexpected error in Start: %v", i, err)
				continue
			}
			var rows []parser.DTuple
			next, err := plan.Next()
			for ; next; next, err = plan.Next() {
				rows = append(rows, plan.Values())
			}
			if err != nil {
				t.Error(err)
				continue
			}
			if !reflect.DeepEqual(rows, tc.rows) {
				t.Errorf("%d: expected rows:\n%+v\nactual rows:\n%+v", i, tc.rows, rows)
			}
		}
	}
}
Beispiel #21
0
func dumpTable(w io.Writer, conn *sqlConn, origDBName, origTableName string) error {
	const limit = 100

	// Escape names since they can't be used in placeholders.
	dbname := parser.Name(origDBName).String()
	tablename := parser.Name(origTableName).String()

	if err := conn.Exec(fmt.Sprintf("SET DATABASE = %s", dbname), nil); err != nil {
		return err
	}

	// Fetch all table metadata in a transaction and its time to guarantee it
	// doesn't change between the various SHOW statements.
	if err := conn.Exec("BEGIN", nil); err != nil {
		return err
	}

	vals, err := conn.QueryRow("SELECT cluster_logical_timestamp()::int", nil)
	if err != nil {
		return err
	}
	clusterTSStart := vals[0].(int64)
	clusterTS := time.Unix(0, clusterTSStart).Format(time.RFC3339Nano)

	// A previous version of the code did a SELECT on system.descriptor. This
	// required the SELECT privilege to the descriptor table, which only root
	// has. Allowing non-root to do this would let users see other users' table
	// descriptors which is a problem in multi-tenancy.

	// Fetch column types.
	rows, err := conn.Query(fmt.Sprintf("SHOW COLUMNS FROM %s", tablename), nil)
	if err != nil {
		return err
	}
	vals = make([]driver.Value, 2)
	coltypes := make(map[string]string)
	for {
		if err := rows.Next(vals); err == io.EOF {
			break
		} else if err != nil {
			return err
		}
		name, ok := vals[0].(string)
		if !ok {
			return fmt.Errorf("unexpected value: %T", vals[1])

		}
		typ, ok := vals[1].(string)
		if !ok {
			return fmt.Errorf("unexpected value: %T", vals[4])

		}
		coltypes[name] = typ
	}
	if err := rows.Close(); err != nil {
		return err
	}

	// index holds the names, in order, of the primary key columns.
	var index []string
	// Primary index is always the first index returned by SHOW INDEX.
	rows, err = conn.Query(fmt.Sprintf("SHOW INDEX FROM %s", tablename), nil)
	if err != nil {
		return err
	}
	vals = make([]driver.Value, 5)
	var primaryIndex string
	// Find the primary index columns.
	for {
		if err := rows.Next(vals); err == io.EOF {
			break
		} else if err != nil {
			return err
		}
		b, ok := vals[1].(string)
		if !ok {
			return fmt.Errorf("unexpected value: %T", vals[1])
		}
		if primaryIndex == "" {
			primaryIndex = b
		} else if primaryIndex != b {
			break
		}
		b, ok = vals[4].(string)
		if !ok {
			return fmt.Errorf("unexpected value: %T", vals[4])
		}
		index = append(index, parser.Name(b).String())
	}
	if err := rows.Close(); err != nil {
		return err
	}
	if len(index) == 0 {
		return fmt.Errorf("no primary key index found")
	}
	indexes := strings.Join(index, ", ")

	// Build the SELECT query.
	var sbuf bytes.Buffer
	fmt.Fprintf(&sbuf, "SELECT %s, * FROM %s@%s AS OF SYSTEM TIME '%s'", indexes, tablename, primaryIndex, clusterTS)

	var wbuf bytes.Buffer
	fmt.Fprintf(&wbuf, " WHERE ROW (%s) > ROW (", indexes)
	for i := range index {
		if i > 0 {
			wbuf.WriteString(", ")
		}
		fmt.Fprintf(&wbuf, "$%d", i+1)
	}
	wbuf.WriteString(")")
	// No WHERE clause first time, so add a place to inject it.
	fmt.Fprintf(&sbuf, "%%s ORDER BY %s LIMIT %d", indexes, limit)
	bs := sbuf.String()

	vals, err = conn.QueryRow(fmt.Sprintf("SHOW CREATE TABLE %s", tablename), nil)
	if err != nil {
		return err
	}
	create := vals[1].(string)
	if _, err := w.Write([]byte(create)); err != nil {
		return err
	}
	if _, err := w.Write([]byte(";\n")); err != nil {
		return err
	}

	if err := conn.Exec("COMMIT", nil); err != nil {
		return err
	}

	// pk holds the last values of the fetched primary keys
	var pk []driver.Value
	q := fmt.Sprintf(bs, "")
	for {
		rows, err := conn.Query(q, pk)
		if err != nil {
			return err
		}
		cols := rows.Columns()
		pkcols := cols[:len(index)]
		cols = cols[len(index):]
		inserts := make([][]string, 0, limit)
		i := 0
		for i < limit {
			vals := make([]driver.Value, len(cols)+len(pkcols))
			if err := rows.Next(vals); err == io.EOF {
				break
			} else if err != nil {
				return err
			}
			if pk == nil {
				q = fmt.Sprintf(bs, wbuf.String())
			}
			pk = vals[:len(index)]
			vals = vals[len(index):]
			ivals := make([]string, len(vals))
			// Values need to be correctly encoded for INSERT statements in a text file.
			for si, sv := range vals {
				switch t := sv.(type) {
				case nil:
					ivals[si] = "NULL"
				case bool:
					ivals[si] = parser.MakeDBool(parser.DBool(t)).String()
				case int64:
					ivals[si] = parser.NewDInt(parser.DInt(t)).String()
				case float64:
					ivals[si] = parser.NewDFloat(parser.DFloat(t)).String()
				case string:
					ivals[si] = parser.NewDString(t).String()
				case []byte:
					switch ct := coltypes[cols[si]]; ct {
					case "INTERVAL":
						ivals[si] = fmt.Sprintf("'%s'", t)
					case "BYTES":
						ivals[si] = parser.NewDBytes(parser.DBytes(t)).String()
					default:
						// STRING and DECIMAL types can have optional length
						// suffixes, so only examine the prefix of the type.
						if strings.HasPrefix(coltypes[cols[si]], "STRING") {
							ivals[si] = parser.NewDString(string(t)).String()
						} else if strings.HasPrefix(coltypes[cols[si]], "DECIMAL") {
							ivals[si] = string(t)
						} else {
							panic(errors.Errorf("unknown []byte type: %s, %v: %s", t, cols[si], coltypes[cols[si]]))
						}
					}
				case time.Time:
					var d parser.Datum
					ct := coltypes[cols[si]]
					switch ct {
					case "DATE":
						d = parser.NewDDateFromTime(t, time.UTC)
					case "TIMESTAMP":
						d = parser.MakeDTimestamp(t, time.Nanosecond)
					case "TIMESTAMP WITH TIME ZONE":
						d = parser.MakeDTimestampTZ(t, time.Nanosecond)
					default:
						panic(errors.Errorf("unknown timestamp type: %s, %v: %s", t, cols[si], coltypes[cols[si]]))
					}
					ivals[si] = fmt.Sprintf("'%s'", d)
				default:
					panic(errors.Errorf("unknown field type: %T (%s)", t, cols[si]))
				}
			}
			inserts = append(inserts, ivals)
			i++
		}
		for si, sv := range pk {
			b, ok := sv.([]byte)
			if ok && strings.HasPrefix(coltypes[pkcols[si]], "STRING") {
				// Primary key strings need to be converted to a go string, but not SQL
				// encoded since they aren't being written to a text file.
				pk[si] = string(b)
			}
		}
		if err := rows.Close(); err != nil {
			return err
		}
		if i == 0 {
			break
		}
		fmt.Fprintf(w, "\nINSERT INTO %s VALUES", tablename)
		for idx, values := range inserts {
			if idx > 0 {
				fmt.Fprint(w, ",")
			}
			fmt.Fprint(w, "\n\t(")
			for vi, v := range values {
				if vi > 0 {
					fmt.Fprint(w, ", ")
				}
				fmt.Fprint(w, v)
			}
			fmt.Fprint(w, ")")
		}
		fmt.Fprintln(w, ";")
		if i < limit {
			break
		}
	}
	return nil
}
Beispiel #22
0
// ShowCreateTable returns a CREATE TABLE statement for the specified table in
// Traditional syntax.
// Privileges: None.
func (p *planner) ShowCreateTable(n *parser.ShowCreateTable) (planNode, error) {
	desc, err := p.getTableDesc(n.Table)
	if err != nil {
		return nil, err
	}
	if desc == nil {
		return nil, sqlbase.NewUndefinedTableError(n.Table.String())
	}
	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Table", Typ: parser.TypeString},
			{Name: "CreateTable", Typ: parser.TypeString},
		},
	}

	var buf bytes.Buffer
	fmt.Fprintf(&buf, "CREATE TABLE %s (", quoteNames(n.Table.String()))
	var primary string
	for i, col := range desc.VisibleColumns() {
		if i != 0 {
			buf.WriteString(",")
		}
		buf.WriteString("\n\t")
		fmt.Fprintf(&buf, "%s %s", quoteNames(col.Name), col.Type.SQLString())
		if col.Nullable {
			buf.WriteString(" NULL")
		} else {
			buf.WriteString(" NOT NULL")
		}
		if col.DefaultExpr != nil {
			fmt.Fprintf(&buf, " DEFAULT %s", *col.DefaultExpr)
		}
		if desc.PrimaryIndex.ColumnIDs[0] == col.ID {
			// Only set primary if the primary key is on a visible column (not rowid).
			primary = fmt.Sprintf(",\n\tCONSTRAINT %s PRIMARY KEY (%s)",
				quoteNames(desc.PrimaryIndex.Name),
				quoteNames(desc.PrimaryIndex.ColumnNames...),
			)
		}
	}
	buf.WriteString(primary)
	for _, idx := range desc.Indexes {
		var storing string
		if len(idx.StoreColumnNames) > 0 {
			storing = fmt.Sprintf(" STORING (%s)", quoteNames(idx.StoreColumnNames...))
		}
		fmt.Fprintf(&buf, ",\n\t%sINDEX %s (%s)%s",
			isUnique[idx.Unique],
			quoteNames(idx.Name),
			quoteNames(idx.ColumnNames...),
			storing,
		)
	}

	for _, e := range desc.Checks {
		fmt.Fprintf(&buf, ",\n\t")
		if len(e.Name) > 0 {
			fmt.Fprintf(&buf, "CONSTRAINT %s ", quoteNames(e.Name))
		}
		fmt.Fprintf(&buf, "CHECK (%s)", e.Expr)
	}

	buf.WriteString("\n)")
	v.rows = append(v.rows, []parser.Datum{
		parser.NewDString(n.Table.String()),
		parser.NewDString(buf.String()),
	})
	return v, nil
}
Beispiel #23
0
// ShowCreateTable returns a CREATE TABLE statement for the specified table in
// Traditional syntax.
// Privileges: None.
func (p *planner) ShowCreateTable(n *parser.ShowCreateTable) (planNode, error) {
	desc, err := p.mustGetTableDesc(n.Table)
	if err != nil {
		return nil, err
	}

	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Table", Typ: parser.TypeString},
			{Name: "CreateTable", Typ: parser.TypeString},
		},
	}

	var buf bytes.Buffer
	fmt.Fprintf(&buf, "CREATE TABLE %s (", quoteNames(n.Table.String()))
	var primary string
	for i, col := range desc.VisibleColumns() {
		if i != 0 {
			buf.WriteString(",")
		}
		buf.WriteString("\n\t")
		fmt.Fprintf(&buf, "%s %s", quoteNames(col.Name), col.Type.SQLString())
		if col.NullableConstraintName != "" {
			fmt.Fprintf(&buf, " CONSTRAINT %s", col.NullableConstraintName)
		}
		if col.Nullable {
			buf.WriteString(" NULL")
		} else {
			buf.WriteString(" NOT NULL")
		}
		if col.DefaultExpr != nil {
			if col.DefaultExprConstraintName != "" {
				fmt.Fprintf(&buf, " CONSTRAINT %s", col.DefaultExprConstraintName)
			}
			fmt.Fprintf(&buf, " DEFAULT %s", *col.DefaultExpr)
		}
		if desc.PrimaryIndex.ColumnIDs[0] == col.ID {
			// Only set primary if the primary key is on a visible column (not rowid).
			primary = fmt.Sprintf(",\n\tCONSTRAINT %s PRIMARY KEY (%s)",
				quoteNames(desc.PrimaryIndex.Name),
				quoteNames(desc.PrimaryIndex.ColumnNames...),
			)
		}
	}
	buf.WriteString(primary)
	for _, idx := range desc.Indexes {
		var storing string
		if len(idx.StoreColumnNames) > 0 {
			storing = fmt.Sprintf(" STORING (%s)", quoteNames(idx.StoreColumnNames...))
		}
		interleave, err := p.showCreateInterleave(&idx)
		if err != nil {
			return nil, err
		}
		fmt.Fprintf(&buf, ",\n\t%sINDEX %s (%s)%s%s",
			isUnique[idx.Unique],
			quoteNames(idx.Name),
			quoteNames(idx.ColumnNames...),
			storing,
			interleave,
		)
	}
	for _, fam := range desc.Families {
		activeColumnNames := make([]string, 0, len(fam.ColumnNames))
		for i, colID := range fam.ColumnIDs {
			if _, err := desc.FindActiveColumnByID(colID); err == nil {
				activeColumnNames = append(activeColumnNames, fam.ColumnNames[i])
			}
		}
		fmt.Fprintf(&buf, ",\n\tFAMILY %s (%s)",
			quoteNames(fam.Name),
			quoteNames(activeColumnNames...),
		)
	}

	for _, e := range desc.Checks {
		fmt.Fprintf(&buf, ",\n\t")
		if len(e.Name) > 0 {
			fmt.Fprintf(&buf, "CONSTRAINT %s ", quoteNames(e.Name))
		}
		fmt.Fprintf(&buf, "CHECK (%s)", e.Expr)
	}

	buf.WriteString("\n)")
	interleave, err := p.showCreateInterleave(&desc.PrimaryIndex)
	if err != nil {
		return nil, err
	}
	buf.WriteString(interleave)

	v.rows = append(v.rows, []parser.Datum{
		parser.NewDString(n.Table.String()),
		parser.NewDString(buf.String()),
	})
	return v, nil
}
Beispiel #24
0
// ShowConstraints returns all the constraints for a table.
// Privileges: None.
//   Notes: postgres does not have a SHOW CONSTRAINTS statement.
//          mysql requires some privilege for any column.
func (p *planner) ShowConstraints(n *parser.ShowConstraints) (planNode, error) {
	desc, err := p.mustGetTableDesc(n.Table)
	if err != nil {
		return nil, err
	}

	v := &valuesNode{
		columns: []ResultColumn{
			{Name: "Table", Typ: parser.TypeString},
			{Name: "Name", Typ: parser.TypeString},
			{Name: "Type", Typ: parser.TypeString},
			{Name: "Column(s)", Typ: parser.TypeString},
			{Name: "Details", Typ: parser.TypeString},
		},
	}

	appendRow := func(name, typ, columns, details string) {
		detailsDatum := parser.DNull
		if details != "" {
			detailsDatum = parser.NewDString(details)
		}
		columnsDatum := parser.DNull
		if columns != "" {
			columnsDatum = parser.NewDString(columns)
		}
		v.rows = append(v.rows, []parser.Datum{
			parser.NewDString(n.Table.Table()),
			parser.NewDString(name),
			parser.NewDString(typ),
			columnsDatum,
			detailsDatum,
		})
	}

	for _, index := range append([]sqlbase.IndexDescriptor{desc.PrimaryIndex}, desc.Indexes...) {
		if index.ID == desc.PrimaryIndex.ID {
			appendRow(index.Name, "PRIMARY KEY", fmt.Sprintf("%+v", index.ColumnNames), "")
		} else if index.Unique {
			appendRow(index.Name, "UNIQUE", fmt.Sprintf("%+v", index.ColumnNames), "")
		}
		if index.ForeignKey != nil {
			other, err := p.getTableLeaseByID(index.ForeignKey.Table)
			if err != nil {
				return nil, errors.Errorf("error resolving table %d referenced in foreign key",
					index.ForeignKey.Table)
			}
			otherIdx, err := other.FindIndexByID(index.ForeignKey.Index)
			if err != nil {
				return nil, errors.Errorf("error resolving index %d in table %s referenced in foreign key",
					index.ForeignKey.Index, other.Name)
			}
			appendRow(index.ForeignKey.Name, "FOREIGN KEY", fmt.Sprintf("%v", index.ColumnNames),
				fmt.Sprintf("%s.%v", other.Name, otherIdx.ColumnNames))
		}
	}
	for _, c := range desc.Checks {
		appendRow(c.Name, "CHECK", "", c.Expr)
	}

	for _, c := range desc.Columns {
		if c.DefaultExprConstraintName != "" {
			appendRow(c.DefaultExprConstraintName, "DEFAULT", c.Name, *c.DefaultExpr)
		}
		if c.NullableConstraintName != "" {
			if c.Nullable {
				appendRow(c.NullableConstraintName, "NULL", c.Name, "")
			} else {
				appendRow(c.NullableConstraintName, "NOT NULL", c.Name, "")
			}
		}
	}

	// Sort the results by constraint name.
	sort := &sortNode{
		ordering: sqlbase.ColumnOrdering{
			{ColIdx: 0, Direction: encoding.Ascending},
			{ColIdx: 1, Direction: encoding.Ascending},
		},
		columns: v.columns,
	}
	return &selectTopNode{source: v, sort: sort}, nil
}
Beispiel #25
0
// RowEnglishFn is a GenValueFn which returns an English representation of the
// row number, as a DString
func RowEnglishFn(row int) parser.Datum {
	return parser.NewDString(IntToEnglish(row))
}
Beispiel #26
0
// decodeOidDatum decodes bytes with specified Oid and format code into
// a datum.
func decodeOidDatum(id oid.Oid, code formatCode, b []byte) (parser.Datum, error) {
	var d parser.Datum
	switch id {
	case oid.T_bool:
		switch code {
		case formatText:
			v, err := strconv.ParseBool(string(b))
			if err != nil {
				return d, err
			}
			d = parser.MakeDBool(parser.DBool(v))
		case formatBinary:
			switch b[0] {
			case 0:
				d = parser.MakeDBool(false)
			case 1:
				d = parser.MakeDBool(true)
			default:
				return d, util.Errorf("unsupported binary bool: %q", b)
			}
		default:
			return d, util.Errorf("unsupported bool format code: %s", code)
		}
	case oid.T_int2:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int16
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, util.Errorf("unsupported int2 format code: %s", code)
		}
	case oid.T_int4:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int32
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, util.Errorf("unsupported int4 format code: %s", code)
		}
	case oid.T_int8:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int64
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, util.Errorf("unsupported int8 format code: %s", code)
		}
	case oid.T_float4:
		switch code {
		case formatText:
			f, err := strconv.ParseFloat(string(b), 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		case formatBinary:
			var f float32
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &f)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		default:
			return d, util.Errorf("unsupported float4 format code: %s", code)
		}
	case oid.T_float8:
		switch code {
		case formatText:
			f, err := strconv.ParseFloat(string(b), 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		case formatBinary:
			var f float64
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &f)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		default:
			return d, util.Errorf("unsupported float8 format code: %s", code)
		}
	case oid.T_numeric:
		switch code {
		case formatText:
			dd := &parser.DDecimal{}
			if _, ok := dd.SetString(string(b)); !ok {
				return nil, util.Errorf("could not parse string %q as decimal", b)
			}
			d = dd
		case formatBinary:
			r := bytes.NewReader(b)

			alloc := struct {
				pgNum pgNumeric
				i16   int16

				dd parser.DDecimal
			}{}

			for _, ptr := range []interface{}{
				&alloc.pgNum.ndigits,
				&alloc.pgNum.weight,
				&alloc.pgNum.sign,
				&alloc.pgNum.dscale,
			} {
				if err := binary.Read(r, binary.BigEndian, ptr); err != nil {
					return d, err
				}
			}

			decDigits := make([]byte, 0, alloc.pgNum.ndigits*pgDecDigits)
			for i := int16(0); i < alloc.pgNum.ndigits-1; i++ {
				if err := binary.Read(r, binary.BigEndian, &alloc.i16); err != nil {
					return d, err
				}
				decDigits = strconv.AppendUint(decDigits, uint64(alloc.i16), 10)
			}

			// The last digit may contain padding, which we need to deal with.
			if err := binary.Read(r, binary.BigEndian, &alloc.i16); err != nil {
				return d, err
			}
			dscale := (alloc.pgNum.ndigits - 1 - alloc.pgNum.weight) * pgDecDigits
			if overScale := dscale - alloc.pgNum.dscale; overScale > 0 {
				dscale -= overScale
				for i := int16(0); i < overScale; i++ {
					alloc.i16 /= 10
				}
			}
			decDigits = strconv.AppendUint(decDigits, uint64(alloc.i16), 10)
			alloc.dd.UnscaledBig().SetString(string(decDigits), 10)
			alloc.dd.SetScale(inf.Scale(dscale))

			switch alloc.pgNum.sign {
			case pgNumericPos:
			case pgNumericNeg:
				alloc.dd.Neg(&alloc.dd.Dec)
			default:
				return d, util.Errorf("unsupported numeric sign: %s", alloc.pgNum.sign)
			}

			d = &alloc.dd
		default:
			return d, util.Errorf("unsupported numeric format code: %s", code)
		}
	case oid.T_text, oid.T_varchar:
		switch code {
		case formatText, formatBinary:
			d = parser.NewDString(string(b))
		default:
			return d, util.Errorf("unsupported text format code: %s", code)
		}
	case oid.T_bytea:
		switch code {
		case formatText:
			// http://www.postgresql.org/docs/current/static/datatype-binary.html#AEN5667
			// Code cribbed from github.com/lib/pq.

			// We only support hex encoding.
			if len(b) >= 2 && bytes.Equal(b[:2], []byte("\\x")) {
				b = b[2:] // trim off leading "\\x"
				result := make([]byte, hex.DecodedLen(len(b)))
				_, err := hex.Decode(result, b)
				if err != nil {
					return d, err
				}
				d = parser.NewDBytes(parser.DBytes(result))
			} else {
				return d, util.Errorf("unsupported bytea encoding: %q", b)
			}
		case formatBinary:
			d = parser.NewDBytes(parser.DBytes(b))
		default:
			return d, util.Errorf("unsupported bytea format code: %s", code)
		}
	case oid.T_timestamp, oid.T_timestamptz:
		switch code {
		case formatText:
			ts, err := parseTs(string(b))
			if err != nil {
				return d, util.Errorf("could not parse string %q as timestamp", b)
			}
			d = parser.MakeDTimestamp(ts, time.Microsecond)
		default:
			return d, util.Errorf("unsupported timestamp format code: %s", code)
		}
	case oid.T_date:
		switch code {
		case formatText:
			ts, err := parseTs(string(b))
			if err != nil {
				return d, util.Errorf("could not parse string %q as date", b)
			}
			daysSinceEpoch := ts.Unix() / secondsInDay
			d = parser.NewDDate(parser.DDate(daysSinceEpoch))
		default:
			return d, util.Errorf("unsupported date format code: %s", code)
		}
	default:
		return d, util.Errorf("unsupported OID: %v", id)
	}
	return d, nil
}
Beispiel #27
0
// decodeOidDatum decodes bytes with specified Oid and format code into
// a datum.
func decodeOidDatum(id oid.Oid, code formatCode, b []byte) (parser.Datum, error) {
	var d parser.Datum
	switch id {
	case oid.T_bool:
		switch code {
		case formatText:
			v, err := strconv.ParseBool(string(b))
			if err != nil {
				return d, err
			}
			d = parser.MakeDBool(parser.DBool(v))
		default:
			return d, fmt.Errorf("unsupported bool format code: %d", code)
		}
	case oid.T_int2:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int16
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, fmt.Errorf("unsupported int2 format code: %d", code)
		}
	case oid.T_int4:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int32
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, fmt.Errorf("unsupported int4 format code: %d", code)
		}
	case oid.T_int8:
		switch code {
		case formatText:
			i, err := strconv.ParseInt(string(b), 10, 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		case formatBinary:
			var i int64
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &i)
			if err != nil {
				return d, err
			}
			d = parser.NewDInt(parser.DInt(i))
		default:
			return d, fmt.Errorf("unsupported int8 format code: %d", code)
		}
	case oid.T_float4:
		switch code {
		case formatText:
			f, err := strconv.ParseFloat(string(b), 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		case formatBinary:
			var f float32
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &f)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		default:
			return d, fmt.Errorf("unsupported float4 format code: %d", code)
		}
	case oid.T_float8:
		switch code {
		case formatText:
			f, err := strconv.ParseFloat(string(b), 64)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		case formatBinary:
			var f float64
			err := binary.Read(bytes.NewReader(b), binary.BigEndian, &f)
			if err != nil {
				return d, err
			}
			d = parser.NewDFloat(parser.DFloat(f))
		default:
			return d, fmt.Errorf("unsupported float8 format code: %d", code)
		}
	case oid.T_numeric:
		switch code {
		case formatText:
			dd := &parser.DDecimal{}
			if _, ok := dd.SetString(string(b)); !ok {
				return nil, fmt.Errorf("could not parse string %q as decimal", b)
			}
			d = dd
		default:
			return d, fmt.Errorf("unsupported numeric format code: %d", code)
		}
	case oid.T_text, oid.T_varchar:
		switch code {
		case formatText:
			d = parser.NewDString(string(b))
		default:
			return d, fmt.Errorf("unsupported text format code: %d", code)
		}
	case oid.T_bytea:
		switch code {
		case formatText:
			// http://www.postgresql.org/docs/current/static/datatype-binary.html#AEN5667
			// Code cribbed from github.com/lib/pq.

			// We only support hex encoding.
			if len(b) >= 2 && bytes.Equal(b[:2], []byte("\\x")) {
				b = b[2:] // trim off leading "\\x"
				result := make([]byte, hex.DecodedLen(len(b)))
				_, err := hex.Decode(result, b)
				if err != nil {
					return d, err
				}
				d = parser.NewDBytes(parser.DBytes(result))
			} else {
				return d, fmt.Errorf("unsupported bytea encoding: %q", b)
			}
		case formatBinary:
			d = parser.NewDBytes(parser.DBytes(b))
		default:
			return d, fmt.Errorf("unsupported bytea format code: %d", code)
		}
	case oid.T_timestamp, oid.T_timestamptz:
		switch code {
		case formatText:
			ts, err := parseTs(string(b))
			if err != nil {
				return d, fmt.Errorf("could not parse string %q as timestamp", b)
			}
			d = &parser.DTimestamp{Time: ts}
		case formatBinary:
			return d, fmt.Errorf("unsupported timestamp format code: %d", code)
		}
	case oid.T_date:
		switch code {
		case formatText:
			ts, err := parseTs(string(b))
			if err != nil {
				return d, fmt.Errorf("could not parse string %q as date", b)
			}
			daysSinceEpoch := ts.Unix() / secondsInDay
			d = parser.NewDDate(parser.DDate(daysSinceEpoch))
		case formatBinary:
			return d, fmt.Errorf("unsupported date format code: %d", code)
		}
	default:
		return d, fmt.Errorf("unsupported OID: %v", id)
	}
	return d, nil
}