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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// Author: Marc Berhault (marc@cockroachlabs.com)
package sqlbase
import (
"fmt"
"github.com/cockroachdb/cockroach/pkg/config"
"github.com/cockroachdb/cockroach/pkg/keys"
"github.com/cockroachdb/cockroach/pkg/roachpb"
"github.com/cockroachdb/cockroach/pkg/security"
"github.com/cockroachdb/cockroach/pkg/sql/privilege"
)
// sql CREATE commands and full schema for each system table.
// These strings are *not* used at runtime, but are checked by the
// `TestSystemTableLiterals` test that compares the table generated by
// evaluating the `CREATE TABLE` statement to the descriptor literal that is
// actually used at runtime.
// These system tables are part of the system config.
const (
NamespaceTableSchema = `
CREATE TABLE system.namespace (
"parentID" INT,
name STRING,
id INT,
PRIMARY KEY ("parentID", name)
);`
DescriptorTableSchema = `
CREATE TABLE system.descriptor (
id INT PRIMARY KEY,
descriptor BYTES
);`
UsersTableSchema = `
CREATE TABLE system.users (
username STRING PRIMARY KEY,
"hashedPassword" BYTES
);`
// Zone settings per DB/Table.
ZonesTableSchema = `
CREATE TABLE system.zones (
id INT PRIMARY KEY,
config BYTES
);`
SettingsTableSchema = `
CREATE TABLE system.settings (
name STRING NOT NULL PRIMARY KEY,
value STRING NOT NULL,
"lastUpdated" TIMESTAMP NOT NULL DEFAULT now(),
"valueType" STRING,
FAMILY (name, value, "lastUpdated", "valueType")
);`
)
// These system tables are not part of the system config.
const (
LeaseTableSchema = `
CREATE TABLE system.lease (
"descID" INT,
version INT,
"nodeID" INT,
expiration TIMESTAMP,
PRIMARY KEY ("descID", version, expiration, "nodeID")
);`
EventLogTableSchema = `
CREATE TABLE system.eventlog (
timestamp TIMESTAMP NOT NULL,
"eventType" STRING NOT NULL,
"targetID" INT NOT NULL,
"reportingID" INT NOT NULL,
info STRING,
"uniqueID" BYTES DEFAULT uuid_v4(),
PRIMARY KEY (timestamp, "uniqueID")
);`
// rangelog is currently envisioned as a wide table; many different event
// types can be recorded to the table.
RangeEventTableSchema = `
CREATE TABLE system.rangelog (
timestamp TIMESTAMP NOT NULL,
"rangeID" INT NOT NULL,
"storeID" INT NOT NULL,
"eventType" STRING NOT NULL,
"otherRangeID" INT,
info STRING,
"uniqueID" INT DEFAULT unique_rowid(),
PRIMARY KEY (timestamp, "uniqueID")
);`
UITableSchema = `
CREATE TABLE system.ui (
key STRING PRIMARY KEY,
value BYTES,
"lastUpdated" TIMESTAMP NOT NULL
);`
JobsTableSchema = `
CREATE TABLE system.jobs (
id INT DEFAULT unique_rowid() PRIMARY KEY,
status STRING NOT NULL,
created TIMESTAMP NOT NULL DEFAULT now(),
payload BYTES NOT NULL,
INDEX (status, created),
FAMILY (id, status, created, payload)
);`
)
func pk(name string) IndexDescriptor {
return IndexDescriptor{
Name: "primary",
ID: 1,
Unique: true,
ColumnNames: []string{name},
ColumnDirections: singleASC,
ColumnIDs: singleID1,
}
}
// SystemAllowedPrivileges describes the allowable privilege lists for each
// system object. The root user must have the privileges of exactly one of those
// privilege lists. No user may have more privileges than the root user.
//
// Some system objects were created with different privileges in previous
// versions of the system. These privileges are no longer "desired" but must
// still be "allowed," or this version and the previous version with different
// privileges will be unable to coexist in the same cluster because one version
// will think it has invalid table descriptors.
//
// The currently-desired privileges (i.e., the privileges with which the object
// will be created in fresh clusters) must be listed first in the mapped value,
// followed by previously-desirable but still allowable privileges in any order.
//
// If we supported backwards-incompatible migrations, pruning allowed privileges
// would require a two-step migration process. First, a new version that allows
// both must be deployed to all nodes, after which a a migration to upgrade from
// the old privileges to the new privileges can be run. Only then can a version
// that removes the old allowed versions be deployed. TODO(benesch): Once we
// support backwards-incompatible migrations, prune old allowed privileges.
var SystemAllowedPrivileges = map[ID]privilege.Lists{
keys.SystemDatabaseID: {privilege.ReadData},
keys.NamespaceTableID: {privilege.ReadData},
keys.DescriptorTableID: {privilege.ReadData},
keys.UsersTableID: {privilege.ReadWriteData},
keys.ZonesTableID: {privilege.ReadWriteData},
// We eventually want to migrate the table to appear read-only to force the
// the use of a validating, logging accessor, so we'll go ahead and tolerate
// read-only privs to make that migration possible later.
keys.SettingsTableID: {privilege.ReadWriteData, privilege.ReadData},
keys.LeaseTableID: {privilege.ReadWriteData, {privilege.ALL}},
keys.EventLogTableID: {privilege.ReadWriteData, {privilege.ALL}},
keys.RangeEventTableID: {privilege.ReadWriteData, {privilege.ALL}},
keys.UITableID: {privilege.ReadWriteData, {privilege.ALL}},
// IMPORTANT: CREATE|DROP|ALL privileges should always be denied or database
// users will be able to modify system tables' schemas at will. CREATE and
// DROP privileges are allowed on the above system tables for backwards
// compatibility reasons only!
keys.JobsTableID: {privilege.ReadWriteData},
}
// SystemDesiredPrivileges returns the desired privilege list (i.e., the
// privilege list with which the object should be created with in a fresh
// cluster) for a given system object ID. This function panics if id does not
// exist in the SystemAllowedPrivileges map and should only be used in contexts
// where id is guaranteed to exist.
func SystemDesiredPrivileges(id ID) privilege.List {
return SystemAllowedPrivileges[id][0]
}
// Helpers used to make some of the TableDescriptor literals below more concise.
var (
colTypeInt = ColumnType{Kind: ColumnType_INT}
colTypeString = ColumnType{Kind: ColumnType_STRING}
colTypeBytes = ColumnType{Kind: ColumnType_BYTES}
colTypeTimestamp = ColumnType{Kind: ColumnType_TIMESTAMP}
singleASC = []IndexDescriptor_Direction{IndexDescriptor_ASC}
singleID1 = []ColumnID{1}
)
// These system config TableDescriptor literals should match the descriptor
// that would be produced by evaluating one of the above `CREATE TABLE`
// statements. See the `TestSystemTableLiterals` which checks that they do
// indeed match, and has suggestions on writing and maintaining them.
var (
// SystemDB is the descriptor for the system database.
SystemDB = DatabaseDescriptor{
Name: "system",
ID: keys.SystemDatabaseID,
// Assign max privileges to root user.
Privileges: NewPrivilegeDescriptor(security.RootUser,
SystemDesiredPrivileges(keys.SystemDatabaseID)),
}
// NamespaceTable is the descriptor for the namespace table.
NamespaceTable = TableDescriptor{
Name: "namespace",
ID: keys.NamespaceTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "parentID", ID: 1, Type: colTypeInt},
{Name: "name", ID: 2, Type: colTypeString},
{Name: "id", ID: 3, Type: colTypeInt, Nullable: true},
},
NextColumnID: 4,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"parentID", "name"}, ColumnIDs: []ColumnID{1, 2}},
{Name: "fam_3_id", ID: 3, ColumnNames: []string{"id"}, ColumnIDs: []ColumnID{3}, DefaultColumnID: 3},
},
NextFamilyID: 4,
PrimaryIndex: IndexDescriptor{
Name: "primary",
ID: 1,
Unique: true,
ColumnNames: []string{"parentID", "name"},
ColumnDirections: []IndexDescriptor_Direction{IndexDescriptor_ASC, IndexDescriptor_ASC},
ColumnIDs: []ColumnID{1, 2},
},
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.NamespaceTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
// DescriptorTable is the descriptor for the descriptor table.
DescriptorTable = TableDescriptor{
Name: "descriptor",
ID: keys.DescriptorTableID,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.DescriptorTableID)),
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "id", ID: 1, Type: colTypeInt},
{Name: "descriptor", ID: 2, Type: colTypeBytes, Nullable: true},
},
NextColumnID: 3,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"id"}, ColumnIDs: singleID1},
{Name: "fam_2_descriptor", ID: 2, ColumnNames: []string{"descriptor"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
},
PrimaryIndex: pk("id"),
NextFamilyID: 3,
NextIndexID: 2,
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
// UsersTable is the descriptor for the users table.
UsersTable = TableDescriptor{
Name: "users",
ID: keys.UsersTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "username", ID: 1, Type: colTypeString},
{Name: "hashedPassword", ID: 2, Type: colTypeBytes, Nullable: true},
},
NextColumnID: 3,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"username"}, ColumnIDs: singleID1},
{Name: "fam_2_hashedPassword", ID: 2, ColumnNames: []string{"hashedPassword"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
},
PrimaryIndex: pk("username"),
NextFamilyID: 3,
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.UsersTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
// ZonesTable is the descriptor for the zones table.
ZonesTable = TableDescriptor{
Name: "zones",
ID: keys.ZonesTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "id", ID: 1, Type: colTypeInt},
{Name: "config", ID: 2, Type: colTypeBytes, Nullable: true},
},
NextColumnID: 3,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"id"}, ColumnIDs: singleID1},
{Name: "fam_2_config", ID: 2, ColumnNames: []string{"config"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
},
PrimaryIndex: pk("id"),
NextFamilyID: 3,
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.ZonesTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
// SettingsTable is the descriptor for the jobs table.
SettingsTable = TableDescriptor{
Name: "settings",
ID: keys.SettingsTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "name", ID: 1, Type: colTypeString},
{Name: "value", ID: 2, Type: colTypeString},
{Name: "lastUpdated", ID: 3, Type: colTypeTimestamp, DefaultExpr: &nowString},
{Name: "valueType", ID: 4, Type: colTypeString, Nullable: true},
},
NextColumnID: 5,
Families: []ColumnFamilyDescriptor{
{
Name: "fam_0_name_value_lastUpdated_valueType",
ID: 0,
ColumnNames: []string{"name", "value", "lastUpdated", "valueType"},
ColumnIDs: []ColumnID{1, 2, 3, 4},
},
},
NextFamilyID: 1,
PrimaryIndex: pk("name"),
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.SettingsTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
)
// These system TableDescriptor literals should match the descriptor that
// would be produced by evaluating one of the above `CREATE TABLE` statements
// for system tables that are not system config tables. See the
// `TestSystemTableLiterals` which checks that they do indeed match, and has
// suggestions on writing and maintaining them.
var (
// LeaseTable is the descriptor for the leases table.
LeaseTable = TableDescriptor{
Name: "lease",
ID: keys.LeaseTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "descID", ID: 1, Type: colTypeInt},
{Name: "version", ID: 2, Type: colTypeInt},
{Name: "nodeID", ID: 3, Type: colTypeInt},
{Name: "expiration", ID: 4, Type: colTypeTimestamp},
},
NextColumnID: 5,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"descID", "version", "nodeID", "expiration"}, ColumnIDs: []ColumnID{1, 2, 3, 4}},
},
PrimaryIndex: IndexDescriptor{
Name: "primary",
ID: 1,
Unique: true,
ColumnNames: []string{"descID", "version", "expiration", "nodeID"},
ColumnDirections: []IndexDescriptor_Direction{IndexDescriptor_ASC, IndexDescriptor_ASC, IndexDescriptor_ASC, IndexDescriptor_ASC},
ColumnIDs: []ColumnID{1, 2, 4, 3},
},
NextFamilyID: 1,
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.LeaseTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
uuidV4String = "uuid_v4()"
// EventLogTable is the descriptor for the event log table.
EventLogTable = TableDescriptor{
Name: "eventlog",
ID: keys.EventLogTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "timestamp", ID: 1, Type: colTypeTimestamp},
{Name: "eventType", ID: 2, Type: colTypeString},
{Name: "targetID", ID: 3, Type: colTypeInt},
{Name: "reportingID", ID: 4, Type: colTypeInt},
{Name: "info", ID: 5, Type: colTypeString, Nullable: true},
{Name: "uniqueID", ID: 6, Type: colTypeBytes, DefaultExpr: &uuidV4String},
},
NextColumnID: 7,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"timestamp", "uniqueID"}, ColumnIDs: []ColumnID{1, 6}},
{Name: "fam_2_eventType", ID: 2, ColumnNames: []string{"eventType"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
{Name: "fam_3_targetID", ID: 3, ColumnNames: []string{"targetID"}, ColumnIDs: []ColumnID{3}, DefaultColumnID: 3},
{Name: "fam_4_reportingID", ID: 4, ColumnNames: []string{"reportingID"}, ColumnIDs: []ColumnID{4}, DefaultColumnID: 4},
{Name: "fam_5_info", ID: 5, ColumnNames: []string{"info"}, ColumnIDs: []ColumnID{5}, DefaultColumnID: 5},
},
PrimaryIndex: IndexDescriptor{
Name: "primary",
ID: 1,
Unique: true,
ColumnNames: []string{"timestamp", "uniqueID"},
ColumnDirections: []IndexDescriptor_Direction{IndexDescriptor_ASC, IndexDescriptor_ASC},
ColumnIDs: []ColumnID{1, 6},
},
NextFamilyID: 6,
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.EventLogTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
uniqueRowIDString = "unique_rowid()"
// RangeEventTable is the descriptor for the range log table.
RangeEventTable = TableDescriptor{
Name: "rangelog",
ID: keys.RangeEventTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "timestamp", ID: 1, Type: colTypeTimestamp},
{Name: "rangeID", ID: 2, Type: colTypeInt},
{Name: "storeID", ID: 3, Type: colTypeInt},
{Name: "eventType", ID: 4, Type: colTypeString},
{Name: "otherRangeID", ID: 5, Type: colTypeInt, Nullable: true},
{Name: "info", ID: 6, Type: colTypeString, Nullable: true},
{Name: "uniqueID", ID: 7, Type: colTypeInt, DefaultExpr: &uniqueRowIDString},
},
NextColumnID: 8,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"timestamp", "uniqueID"}, ColumnIDs: []ColumnID{1, 7}},
{Name: "fam_2_rangeID", ID: 2, ColumnNames: []string{"rangeID"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
{Name: "fam_3_storeID", ID: 3, ColumnNames: []string{"storeID"}, ColumnIDs: []ColumnID{3}, DefaultColumnID: 3},
{Name: "fam_4_eventType", ID: 4, ColumnNames: []string{"eventType"}, ColumnIDs: []ColumnID{4}, DefaultColumnID: 4},
{Name: "fam_5_otherRangeID", ID: 5, ColumnNames: []string{"otherRangeID"}, ColumnIDs: []ColumnID{5}, DefaultColumnID: 5},
{Name: "fam_6_info", ID: 6, ColumnNames: []string{"info"}, ColumnIDs: []ColumnID{6}, DefaultColumnID: 6},
},
PrimaryIndex: IndexDescriptor{
Name: "primary",
ID: 1,
Unique: true,
ColumnNames: []string{"timestamp", "uniqueID"},
ColumnDirections: []IndexDescriptor_Direction{IndexDescriptor_ASC, IndexDescriptor_ASC},
ColumnIDs: []ColumnID{1, 7},
},
NextFamilyID: 7,
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.RangeEventTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
// UITable is the descriptor for the ui table.
UITable = TableDescriptor{
Name: "ui",
ID: keys.UITableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "key", ID: 1, Type: colTypeString},
{Name: "value", ID: 2, Type: colTypeBytes, Nullable: true},
{Name: "lastUpdated", ID: 3, Type: ColumnType{Kind: ColumnType_TIMESTAMP}},
},
NextColumnID: 4,
Families: []ColumnFamilyDescriptor{
{Name: "primary", ID: 0, ColumnNames: []string{"key"}, ColumnIDs: singleID1},
{Name: "fam_2_value", ID: 2, ColumnNames: []string{"value"}, ColumnIDs: []ColumnID{2}, DefaultColumnID: 2},
{Name: "fam_3_lastUpdated", ID: 3, ColumnNames: []string{"lastUpdated"}, ColumnIDs: []ColumnID{3}, DefaultColumnID: 3},
},
NextFamilyID: 4,
PrimaryIndex: pk("key"),
NextIndexID: 2,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.UITableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
nowString = "now()"
// JobsTable is the descriptor for the jobs table.
JobsTable = TableDescriptor{
Name: "jobs",
ID: keys.JobsTableID,
ParentID: 1,
Version: 1,
Columns: []ColumnDescriptor{
{Name: "id", ID: 1, Type: colTypeInt, DefaultExpr: &uniqueRowIDString},
{Name: "status", ID: 2, Type: colTypeString},
{Name: "created", ID: 3, Type: colTypeTimestamp, DefaultExpr: &nowString},
{Name: "payload", ID: 4, Type: colTypeBytes},
},
NextColumnID: 5,
Families: []ColumnFamilyDescriptor{
{
Name: "fam_0_id_status_created_payload",
ID: 0,
ColumnNames: []string{"id", "status", "created", "payload"},
ColumnIDs: []ColumnID{1, 2, 3, 4},
},
},
NextFamilyID: 1,
PrimaryIndex: pk("id"),
Indexes: []IndexDescriptor{
{
Name: "jobs_status_created_idx",
ID: 2,
Unique: false,
ColumnNames: []string{"status", "created"},
ColumnDirections: []IndexDescriptor_Direction{IndexDescriptor_ASC, IndexDescriptor_ASC},
ColumnIDs: []ColumnID{2, 3},
ExtraColumnIDs: []ColumnID{1},
},
},
NextIndexID: 3,
Privileges: NewPrivilegeDescriptor(security.RootUser, SystemDesiredPrivileges(keys.JobsTableID)),
FormatVersion: InterleavedFormatVersion,
NextMutationID: 1,
}
)
// Create the key/value pair for the default zone config entry.
func createDefaultZoneConfig() roachpb.KeyValue {
zoneConfig := config.DefaultZoneConfig()
value := roachpb.Value{}
if err := value.SetProto(&zoneConfig); err != nil {
panic(fmt.Sprintf("could not marshal DefaultZoneConfig: %s", err))
}
return roachpb.KeyValue{
Key: MakeZoneKey(keys.RootNamespaceID),
Value: value,
}
}
// addSystemDatabaseToSchema populates the supplied MetadataSchema with the
// System database and its tables. The descriptors for these objects exist
// statically in this file, but a MetadataSchema can be used to persist these
// descriptors to the cockroach store.
func addSystemDatabaseToSchema(target *MetadataSchema) {
// Add system database.
target.AddConfigDescriptor(keys.RootNamespaceID, &SystemDB)
// Add system config tables.
target.AddConfigDescriptor(keys.SystemDatabaseID, &NamespaceTable)
target.AddConfigDescriptor(keys.SystemDatabaseID, &DescriptorTable)
target.AddConfigDescriptor(keys.SystemDatabaseID, &UsersTable)
target.AddConfigDescriptor(keys.SystemDatabaseID, &ZonesTable)
// Add all the other system tables.
target.AddDescriptor(keys.SystemDatabaseID, &LeaseTable)
target.AddDescriptor(keys.SystemDatabaseID, &EventLogTable)
target.AddDescriptor(keys.SystemDatabaseID, &RangeEventTable)
target.AddDescriptor(keys.SystemDatabaseID, &UITable)
// NOTE(benesch): Installation of the jobs table is intentionally omitted
// here; it's added via a migration in both fresh clusters and existing
// clusters. After an upgrade window of a yet-to-be-decided length has passed,
// we'll remove the migration and add the code to install the jobs table here
// in the same release. This ensures there's only ever one code path
// responsible for creating the table. Please follow a similar scheme for any
// new system tables you create.
target.otherKV = append(target.otherKV, createDefaultZoneConfig())
}
// IsSystemConfigID returns whether this ID is for a system config object.
func IsSystemConfigID(id ID) bool {
return id > 0 && id <= keys.MaxSystemConfigDescID
}
// IsReservedID returns whether this ID is for any system object.
func IsReservedID(id ID) bool {
return id > 0 && id <= keys.MaxReservedDescID
}
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