本文整理匯總了Golang中github.com/cockroachdb/cockroach/sql.TableDescriptor類的典型用法代碼示例。如果您正苦於以下問題：Golang TableDescriptor類的具體用法？Golang TableDescriptor怎麽用？Golang TableDescriptor使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了TableDescriptor類的3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: TestAllocateIDs
func TestAllocateIDs(t *testing.T) {
defer leaktest.AfterTest(t)
desc := sql.TableDescriptor{
ID: keys.MaxReservedDescID + 2,
ParentID: keys.MaxReservedDescID + 1,
Name: "foo",
Columns: []sql.ColumnDescriptor{
{Name: "a"},
{Name: "b"},
{Name: "c"},
},
PrimaryIndex: sql.IndexDescriptor{Name: "c", ColumnNames: []string{"a", "b"}},
Indexes: []sql.IndexDescriptor{
{Name: "d", ColumnNames: []string{"b", "a"}},
{Name: "e", ColumnNames: []string{"b"}},
},
Privileges: sql.NewDefaultPrivilegeDescriptor(),
}
if err := desc.AllocateIDs(); err != nil {
t.Fatal(err)
}
expected := sql.TableDescriptor{
ID: keys.MaxReservedDescID + 2,
ParentID: keys.MaxReservedDescID + 1,
Version: 1,
Name: "foo",
Columns: []sql.ColumnDescriptor{
{ID: 1, Name: "a"},
{ID: 2, Name: "b"},
{ID: 3, Name: "c"},
},
PrimaryIndex: sql.IndexDescriptor{
ID: 1, Name: "c", ColumnIDs: []sql.ColumnID{1, 2}, ColumnNames: []string{"a", "b"}},
Indexes: []sql.IndexDescriptor{
{ID: 2, Name: "d", ColumnIDs: []sql.ColumnID{2, 1}, ColumnNames: []string{"b", "a"}},
{ID: 3, Name: "e", ColumnIDs: []sql.ColumnID{2}, ColumnNames: []string{"b"},
ImplicitColumnIDs: []sql.ColumnID{1}},
},
Privileges: sql.NewDefaultPrivilegeDescriptor(),
NextColumnID: 4,
NextIndexID: 4,
}
if !reflect.DeepEqual(expected, desc) {
a, _ := json.MarshalIndent(expected, "", " ")
b, _ := json.MarshalIndent(desc, "", " ")
t.Fatalf("expected %s, but found %s", a, b)
}
if err := desc.AllocateIDs(); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(expected, desc) {
a, _ := json.MarshalIndent(expected, "", " ")
b, _ := json.MarshalIndent(desc, "", " ")
t.Fatalf("expected %s, but found %s", a, b)
}
}示例2: TestAllocateIDs
func TestAllocateIDs(t *testing.T) {
defer leaktest.AfterTest(t)
desc := sql.TableDescriptor{
ID: sql.MaxReservedDescID + 1,
Name: "foo",
Columns: []sql.ColumnDescriptor{
{Name: "a"},
{Name: "b"},
},
PrimaryIndex: sql.IndexDescriptor{Name: "c", ColumnNames: []string{"a"}},
Indexes: []sql.IndexDescriptor{
{Name: "d", ColumnNames: []string{"b", "a"}},
},
Privileges: sql.NewDefaultDatabasePrivilegeDescriptor(),
}
if err := desc.AllocateIDs(); err != nil {
t.Fatal(err)
}
expected := sql.TableDescriptor{
ID: sql.MaxReservedDescID + 1,
Name: "foo",
Columns: []sql.ColumnDescriptor{
{ID: 1, Name: "a"},
{ID: 2, Name: "b"},
},
PrimaryIndex: sql.IndexDescriptor{ID: 1, Name: "c", ColumnIDs: []sql.ColumnID{1}, ColumnNames: []string{"a"}},
Indexes: []sql.IndexDescriptor{
{ID: 2, Name: "d", ColumnIDs: []sql.ColumnID{2, 1}, ColumnNames: []string{"b", "a"}},
},
Privileges: sql.NewDefaultDatabasePrivilegeDescriptor(),
NextColumnID: 3,
NextIndexID: 3,
}
if !reflect.DeepEqual(expected, desc) {
t.Fatalf("expected %+v, but found %+v", expected, desc)
}
}示例3: TestDropIndex
func TestDropIndex(t *testing.T) {
defer leaktest.AfterTest(t)
s, sqlDB, kvDB := setup(t)
defer cleanup(s, sqlDB)
if _, err := sqlDB.Exec(`
CREATE DATABASE t;
CREATE TABLE t.kv (k CHAR PRIMARY KEY, v CHAR);
CREATE INDEX foo on t.kv (v);
INSERT INTO t.kv VALUES ('c', 'e'), ('a', 'c'), ('b', 'd');
`); err != nil {
t.Fatal(err)
}
nameKey := sql.MakeNameMetadataKey(keys.MaxReservedDescID+1, "kv")
gr, err := kvDB.Get(nameKey)
if err != nil {
t.Fatal(err)
}
if !gr.Exists() {
t.Fatalf("Name entry %q does not exist", nameKey)
}
descKey := sql.MakeDescMetadataKey(sql.ID(gr.ValueInt()))
desc := sql.TableDescriptor{}
if err := kvDB.GetProto(descKey, &desc); err != nil {
t.Fatal(err)
}
i, err := desc.FindIndexByName("foo")
if err != nil {
t.Fatal(err)
}
indexPrefix := sql.MakeIndexKeyPrefix(desc.ID, desc.Indexes[i].ID)
indexStartKey := roachpb.Key(indexPrefix)
indexEndKey := indexStartKey.PrefixEnd()
if kvs, err := kvDB.Scan(indexStartKey, indexEndKey, 0); err != nil {
t.Fatal(err)
} else if l := 3; len(kvs) != l {
t.Fatalf("expected %d key value pairs, but got %d", l, len(kvs))
}
if _, err := sqlDB.Exec(`DROP INDEX t.kv[email protected]`); err != nil {
t.Fatal(err)
}
if kvs, err := kvDB.Scan(indexStartKey, indexEndKey, 0); err != nil {
t.Fatal(err)
} else if l := 0; len(kvs) != l {
t.Fatalf("expected %d key value pairs, but got %d", l, len(kvs))
}
if err := kvDB.GetProto(descKey, &desc); err != nil {
t.Fatal(err)
} else {
if _, err := desc.FindIndexByName("foo"); err == nil {
t.Fatalf("table descriptor still contains index after index is dropped")
}
if err != nil {
t.Fatal(err)
}
}
}