本文整理匯總了Golang中github.com/pingcap/tidb/meta.Meta.ListDatabases方法的典型用法代碼示例。如果您正苦於以下問題：Golang Meta.ListDatabases方法的具體用法？Golang Meta.ListDatabases怎麽用？Golang Meta.ListDatabases使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/pingcap/tidb/meta.Meta的用法示例。
在下文中一共展示了Meta.ListDatabases方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: getAllSchemasWithTablesFromMeta
func (do *Domain) getAllSchemasWithTablesFromMeta(m *meta.Meta) ([]*model.DBInfo, error) {
schemas, err := m.ListDatabases()
if err != nil {
return nil, errors.Trace(err)
}
for _, di := range schemas {
if di.State != model.StatePublic {
// schema is not public, can't be used outside.
continue
}
tables, err1 := m.ListTables(di.ID)
if err1 != nil {
err = err1
return nil, errors.Trace(err1)
}
di.Tables = make([]*model.TableInfo, 0, len(tables))
for _, tbl := range tables {
if tbl.State != model.StatePublic {
// schema is not public, can't be used outside.
continue
}
di.Tables = append(di.Tables, tbl)
}
}
return schemas, nil
}示例2: onCreateSchema
func (d *ddl) onCreateSchema(t *meta.Meta, job *model.Job) error {
schemaID := job.SchemaID
var name model.CIStr
if err := job.DecodeArgs(&name); err != nil {
// arg error, cancel this job.
job.State = model.JobCancelled
return errors.Trace(err)
}
dbInfo := &model.DBInfo{
ID: schemaID,
Name: name,
State: model.StateNone,
}
dbs, err := t.ListDatabases()
if err != nil {
return errors.Trace(err)
}
for _, db := range dbs {
if db.Name.L == name.L {
if db.ID != schemaID {
// database exists, can't create, we should cancel this job now.
job.State = model.JobCancelled
return errors.Trace(ErrExists)
}
dbInfo = db
}
}
_, err = t.GenSchemaVersion()
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StateNone:
// none -> public
job.SchemaState = model.StatePublic
dbInfo.State = model.StatePublic
err = t.CreateDatabase(dbInfo)
if err != nil {
return errors.Trace(err)
}
// finish this job
job.State = model.JobDone
return nil
default:
// we can't enter here.
return errors.Errorf("invalid db state %v", dbInfo.State)
}
}示例3: onCreateSchema
func (d *ddl) onCreateSchema(t *meta.Meta, job *model.Job) error {
schemaID := job.SchemaID
dbInfo := &model.DBInfo{}
if err := job.DecodeArgs(dbInfo); err != nil {
// arg error, cancel this job.
job.State = model.JobCancelled
return errors.Trace(err)
}
dbInfo.ID = schemaID
dbInfo.State = model.StateNone
dbs, err := t.ListDatabases()
if err != nil {
return errors.Trace(err)
}
for _, db := range dbs {
if db.Name.L == dbInfo.Name.L {
if db.ID != schemaID {
// database exists, can't create, we should cancel this job now.
job.State = model.JobCancelled
return errors.Trace(infoschema.ErrDatabaseExists)
}
dbInfo = db
}
}
ver, err := updateSchemaVersion(t, job)
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StateNone:
// none -> public
job.SchemaState = model.StatePublic
dbInfo.State = model.StatePublic
err = t.CreateDatabase(dbInfo)
if err != nil {
return errors.Trace(err)
}
// finish this job
job.State = model.JobDone
addDBHistoryInfo(job, ver, dbInfo)
return nil
default:
// we can't enter here.
return errors.Errorf("invalid db state %v", dbInfo.State)
}
}示例4: fetchAllSchemasWithTables
func (do *Domain) fetchAllSchemasWithTables(m *meta.Meta) ([]*model.DBInfo, error) {
allSchemas, err := m.ListDatabases()
if err != nil {
return nil, errors.Trace(err)
}
splittedSchemas := do.splitForConcurrentFetch(allSchemas)
doneCh := make(chan error, len(splittedSchemas))
for _, schemas := range splittedSchemas {
go do.fetchSchemasWithTables(schemas, m, doneCh)
}
for range splittedSchemas {
err = <-doneCh
if err != nil {
return nil, errors.Trace(err)
}
}
return allSchemas, nil
}