// GetZoneConfig returns the zone config for the object with 'id'.
func GetZoneConfig(cfg config.SystemConfig, id uint32) (config.ZoneConfig, bool, error) {
// Look in the zones table.
if zoneVal := cfg.GetValue(sqlbase.MakeZoneKey(sqlbase.ID(id))); zoneVal != nil {
var zone config.ZoneConfig
// We're done.
return zone, true, zoneVal.GetProto(&zone)
}
// No zone config for this ID. We need to figure out if it's a database
// or table. Lookup its descriptor.
if descVal := cfg.GetValue(sqlbase.MakeDescMetadataKey(sqlbase.ID(id))); descVal != nil {
// Determine whether this is a database or table.
var desc sqlbase.Descriptor
if err := descVal.GetProto(&desc); err != nil {
return config.ZoneConfig{}, false, err
}
if tableDesc := desc.GetTable(); tableDesc != nil {
// This is a table descriptor. Lookup its parent database zone config.
return GetZoneConfig(cfg, uint32(tableDesc.ParentID))
}
}
// Retrieve the default zone config, but only as long as that wasn't the ID
// we were trying to retrieve (avoid infinite recursion).
if id != keys.RootNamespaceID {
return GetZoneConfig(cfg, keys.RootNamespaceID)
}
// No descriptor or not a table.
return config.ZoneConfig{}, false, nil
}
// GetZoneConfig returns the zone config for the object with 'id'.
func GetZoneConfig(cfg config.SystemConfig, id uint32) (*config.ZoneConfig, error) {
// Look in the zones table.
if zoneVal := cfg.GetValue(MakeZoneKey(ID(id))); zoneVal != nil {
zone := &config.ZoneConfig{}
if err := zoneVal.GetProto(zone); err != nil {
return nil, err
}
// We're done.
return zone, nil
}
// No zone config for this ID. We need to figure out if it's a database
// or table. Lookup its descriptor.
if descVal := cfg.GetValue(MakeDescMetadataKey(ID(id))); descVal != nil {
// Determine whether this is a database or table.
desc := &Descriptor{}
if err := descVal.GetProto(desc); err != nil {
return nil, err
}
if tableDesc := desc.GetTable(); tableDesc != nil {
// This is a table descriptor. Lookup its parent database zone config.
return GetZoneConfig(cfg, uint32(tableDesc.ParentID))
}
}
// No descriptor or not a table. This table/db could have been deleted, just
// return the default config.
return config.DefaultZoneConfig, nil
}
// GetTableDesc returns the table descriptor for the table with 'id'.
// Returns nil if the descriptor is not present, or is present but is not a
// table.
func GetTableDesc(cfg config.SystemConfig, id sqlbase.ID) (*sqlbase.TableDescriptor, error) {
if descVal := cfg.GetValue(sqlbase.MakeDescMetadataKey(id)); descVal != nil {
desc := &sqlbase.Descriptor{}
if err := descVal.GetProto(desc); err != nil {
return nil, err
}
return desc.GetTable(), nil
}
return nil, nil
}
func isDeleted(tableID sqlbase.ID, cfg config.SystemConfig) bool {
descKey := sqlbase.MakeDescMetadataKey(tableID)
val := cfg.GetValue(descKey)
if val == nil {
return false
}
var descriptor sqlbase.Descriptor
if err := val.GetProto(&descriptor); err != nil {
panic("unable to unmarshal table descriptor")
}
table := descriptor.GetTable()
return table.Deleted()
}
func expectDescriptor(systemConfig config.SystemConfig, idKey roachpb.Key, desc *Descriptor) error {
descValue := systemConfig.GetValue(idKey)
if descValue == nil {
return errStaleMetadata
}
var cachedDesc Descriptor
if err := descValue.GetProto(&cachedDesc); err != nil {
return err
}
if !proto.Equal(&cachedDesc, desc) {
return errStaleMetadata
}
return nil
}
func expectDescriptorID(systemConfig config.SystemConfig, idKey roachpb.Key, id ID) error {
idValue := systemConfig.GetValue(idKey)
if idValue == nil {
return errStaleMetadata
}
cachedID, err := idValue.GetInt()
if err != nil {
return err
}
if ID(cachedID) != id {
return errStaleMetadata
}
return nil
}
func waitForConfigChange(t *testing.T, s *server.TestServer) (*config.SystemConfig, error) {
var foundDesc sql.DatabaseDescriptor
var cfg *config.SystemConfig
return cfg, util.IsTrueWithin(func() bool {
if cfg = s.Gossip().GetSystemConfig(); cfg != nil {
if val := cfg.GetValue(configDescKey); val != nil {
if err := val.GetProto(&foundDesc); err != nil {
t.Fatal(err)
}
return foundDesc.ID == configID
}
}
return false
}, 10*time.Second)
}
func TestGet(t *testing.T) {
defer leaktest.AfterTest(t)
emptyKeys := []proto.KeyValue{}
someKeys := []proto.KeyValue{
plainKV("a", "vala"),
plainKV("c", "valc"),
plainKV("d", "vald"),
}
testCases := []struct {
values []proto.KeyValue
key string
found bool
value string
}{
{emptyKeys, "a", false, ""},
{emptyKeys, "b", false, ""},
{emptyKeys, "c", false, ""},
{emptyKeys, "d", false, ""},
{emptyKeys, "e", false, ""},
{someKeys, "", false, ""},
{someKeys, "b", false, ""},
{someKeys, "e", false, ""},
{someKeys, "a0", false, ""},
{someKeys, "a", true, "vala"},
{someKeys, "c", true, "valc"},
{someKeys, "d", true, "vald"},
}
cfg := config.SystemConfig{}
for tcNum, tc := range testCases {
cfg.Values = tc.values
val, found := cfg.GetValue([]byte(tc.key))
if found != tc.found {
t.Errorf("#%d: expected found=%t", tcNum, tc.found)
continue
}
if string(val) != tc.value {
t.Errorf("#%d: expected value=%s, found %s", tcNum, tc.value, string(val))
}
}
}
// isRenamed tests if a descriptor is updated by gossip to the specified name
// and version.
func isRenamed(
tableID sqlbase.ID,
expectedName string,
expectedVersion sqlbase.DescriptorVersion,
cfg config.SystemConfig,
) bool {
descKey := sqlbase.MakeDescMetadataKey(tableID)
val := cfg.GetValue(descKey)
if val == nil {
return false
}
var descriptor sqlbase.Descriptor
if err := val.GetProto(&descriptor); err != nil {
panic("unable to unmarshal table descriptor")
}
table := descriptor.GetTable()
return table.Name == expectedName && table.Version == expectedVersion
}
func TestGet(t *testing.T) {
defer leaktest.AfterTest(t)
emptyKeys := []roachpb.KeyValue{}
someKeys := []roachpb.KeyValue{
plainKV("a", "vala"),
plainKV("c", "valc"),
plainKV("d", "vald"),
}
aVal := roachpb.MakeValueFromString("vala")
bVal := roachpb.MakeValueFromString("valc")
cVal := roachpb.MakeValueFromString("vald")
testCases := []struct {
values []roachpb.KeyValue
key string
value *roachpb.Value
}{
{emptyKeys, "a", nil},
{emptyKeys, "b", nil},
{emptyKeys, "c", nil},
{emptyKeys, "d", nil},
{emptyKeys, "e", nil},
{someKeys, "", nil},
{someKeys, "b", nil},
{someKeys, "e", nil},
{someKeys, "a0", nil},
{someKeys, "a", &aVal},
{someKeys, "c", &bVal},
{someKeys, "d", &cVal},
}
cfg := config.SystemConfig{}
for tcNum, tc := range testCases {
cfg.Values = tc.values
if val := cfg.GetValue([]byte(tc.key)); !proto.Equal(val, tc.value) {
t.Errorf("#%d: expected=%s, found=%s", tcNum, tc.value, val)
}
}
}
func waitForConfigChange(t *testing.T, s *testServer) *config.SystemConfig {
var foundDesc sql.Descriptor
var cfg *config.SystemConfig
util.SucceedsSoon(t, func() error {
if cfg = s.Gossip().GetSystemConfig(); cfg != nil {
if val := cfg.GetValue(configDescKey); val != nil {
if err := val.GetProto(&foundDesc); err != nil {
t.Fatal(err)
}
if id := foundDesc.GetDatabase().GetID(); id != configID {
return util.Errorf("expected database id %d; got %d", configID, id)
}
return nil
}
}
return util.Errorf("got nil system config")
})
return cfg
}
// GetZoneConfig returns the zone config for the object with 'id'.
func GetZoneConfig(cfg *config.SystemConfig, id uint32) (*config.ZoneConfig, error) {
// Look in the zones table.
if val, ok := cfg.GetValue(MakeZoneKey(ID(id))); ok {
zone := &config.ZoneConfig{}
if err := proto.Unmarshal(val, zone); err != nil {
return nil, err
}
// We're done.
return zone, nil
}
// No zone config for this ID. We need to figure out if it's a database
// or table. Lookup its descriptor.
rawDesc, ok := cfg.GetValue(MakeDescMetadataKey(ID(id)))
if !ok {
// No descriptor. This table/db could have been deleted,
// just return the default config.
return config.DefaultZoneConfig, nil
}
// Determine whether this is a database or table.
// TODO(marc): we need a better way of doing this. Options include:
// - add a type field on the descriptor table
// - separate descriptor tables for databases and tables
// - prebuild list of databases and tables in the system config
var dbDesc DatabaseDescriptor
if err := proto.Unmarshal(rawDesc, &dbDesc); err == nil {
// parses as a database: return default config.
return config.DefaultZoneConfig, nil
}
var tableDesc TableDescriptor
if err := proto.Unmarshal(rawDesc, &tableDesc); err != nil {
// does not parse as a table either: this means an entry in the
// descriptor table we're not familiar with.
return nil, util.Errorf("descriptor for object ID %d is not a table or database", id)
}
// This is a table descriptor. Lookup its parent database zone config.
return GetZoneConfig(cfg, uint32(tableDesc.ParentID))
}
func expectDeleted(systemConfig config.SystemConfig, key roachpb.Key) error {
if systemConfig.GetValue(key) != nil {
return errStaleMetadata
}
return nil
}
