ydb Sql interface

go.mod

@@ -203,6 +203,8 @@ require (
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/subosito/gotenv v1.2.0 // indirect
 	github.com/tinylib/msgp v1.1.6 // indirect
+	github.com/yandex-cloud/ydb-go-sdk/v2 v2.12.0 // indirect
+	github.com/ydb-platform/ydb-go-genproto v0.0.0-20220203104745-929cf9c248bc // indirect
 	go.etcd.io/etcd/api/v3 v3.5.4 // indirect
 	go.etcd.io/etcd/client/pkg/v3 v3.5.4 // indirect
 	go.uber.org/atomic v1.9.0 // indirect

go.sum

@@ -375,6 +375,7 @@ github.com/gofrs/uuid v4.0.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRx
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
+github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=
 github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang-jwt/jwt/v4 v4.0.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
@@ -936,6 +937,11 @@ github.com/xdg-go/scram v1.1.0 h1:d70R37I0HrDLsafRrMBXyrD4lmQbCHE873t00Vr0gm0=
 github.com/xdg-go/scram v1.1.0/go.mod h1:1WAq6h33pAW+iRreB34OORO2Nf7qel3VV3fjBj+hCSs=
 github.com/xdg-go/stringprep v1.0.2 h1:6iq84/ryjjeRmMJwxutI51F2GIPlP5BfTvXHeYjyhBc=
 github.com/xdg-go/stringprep v1.0.2/go.mod h1:8F9zXuvzgwmyT5DUm4GUfZGDdT3W+LCvS6+da4O5kxM=
+github.com/yandex-cloud/go-genproto v0.0.0-20210809082946-a97da516c588/go.mod h1:HEUYX/p8966tMUHHT+TsS0hF/Ca/NYwqprC5WXSDMfE=
+github.com/yandex-cloud/ydb-go-sdk/v2 v2.12.0 h1:TjMLCV3Poata+0Nw+Oa/ztEFagFrochAkGg91PG49jk=
+github.com/yandex-cloud/ydb-go-sdk/v2 v2.12.0/go.mod h1:L09Rymwmcpp9QMCbfGAlMtJ4kLFFsbGjkP3qv58r2yY=
+github.com/ydb-platform/ydb-go-genproto v0.0.0-20220203104745-929cf9c248bc h1:xvTP0fhYNm+Ws+xC34jzF9EdorPUKkucJr0TyybqVSk=
+github.com/ydb-platform/ydb-go-genproto v0.0.0-20220203104745-929cf9c248bc/go.mod h1:cc138nptTn9eKptCQl/grxP6pBKpo/bnXDiOxuVZtps=
 github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d h1:splanxYIlg+5LfHAM6xpdFEAYOk8iySO56hMFq6uLyA=
 github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d/go.mod h1:rHwXgn7JulP+udvsHwJoVG1YGAP6VLg4y9I5dyZdqmA=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=

weed/filer/ydb/ydb_queries.go

@@ -0,0 +1,72 @@
+package ydb
+
+const (
+	createQuery = `
+		PRAGMA TablePathPrefix("%s");
+		CREATE TABLE file_meta (
+			dir_hash int64,
+			name Utf8,
+			directory Utf8,
+			meta String,
+			PRIMARY KEY (dir_hash, name)
+		);`
+
+	insertQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $name AS Utf8;
+		DECLARE $directory AS Utf8;
+		DECLARE $meta AS String;
+
+		UPSERT INTO file_meta
+			(dir_hash, name, directory, meta)
+		VALUES
+			($dir_hash, $name, $directory, $meta);`
+
+	updateQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $name AS Utf8;
+		DECLARE $directory AS Utf8;
+		DECLARE $meta AS String;
+
+		REPLACE INTO file_meta
+			(dir_hash, name, directory, meta)
+		VALUES
+			($dir_hash, $name, $directory, $meta)
+		COMMIT;`
+
+	deleteQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $name AS Utf8;
+
+		DELETE FROM file_meta 
+		WHERE dir_hash == $dir_hash AND name == $name;
+		COMMIT;`
+
+	findQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $name AS Utf8;
+		
+		SELECT meta
+		FROM file_meta
+		WHERE dir_hash == $dir_hash AND name == $name;`
+
+	deleteFolderChildrenQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $directory AS Utf8;
+
+		DELETE FROM file_meta 
+		WHERE dir_hash == $dir_hash AND directory == $directory;
+		COMMIT;`
+
+	ListDirectoryQuery = `
+		DECLARE $dir_hash int64;
+		DECLARE $directory AS Utf8;
+		DECLARE $start_name AS Utf8;
+		DECLARE $prefix AS Utf8;
+		DECLARE $limit AS int64;
+		
+		SELECT name, meta
+		FROM file_meta
+		WHERE dir_hash == $dir_hash AND directory == $directory and name %v $start_name and name LIKE '$prefix%'
+		ORDER BY name ASC LIMIT $limit;`
+)

weed/filer/ydb/ydb_store.go

@@ -4,11 +4,13 @@ import (
 	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/yandex-cloud/ydb-go-sdk/v2"
 	"github.com/yandex-cloud/ydb-go-sdk/v2/connect"
 	"github.com/yandex-cloud/ydb-go-sdk/v2/table"
+	"path"
 	"strings"
 	"time"
 )
@@ -24,53 +26,6 @@ var (
 	)
 )
 
-const (
-	createQuery = `
-		PRAGMA TablePathPrefix("%s");
-		CREATE TABLE file_meta (
-			dir_hash int64,
-			name Utf8,
-			directory Utf8,
-			meta String,
-			PRIMARY KEY (dir_hash, name)
-		);`
-	insertQuery = `
-		DECLARE $dir_hash int64;
-		DECLARE $name AS Utf8;
-		DECLARE $directory AS Utf8;
-		DECLARE $meta AS String;
-
-		UPSERT INTO file_meta
-			(dir_hash, name, directory, meta)
-		VALUES
-			($dir_hash, $name, $directory, $meta);`
-	updateQuery = `
-		DECLARE $dir_hash int64;
-		DECLARE $name AS Utf8;
-		DECLARE $directory AS Utf8;
-		DECLARE $meta AS String;
-
-		REPLACE INTO file_meta
-			(dir_hash, name, directory, meta)
-		VALUES
-			($dir_hash, $name, $directory, $meta)
-		COMMIT;`
-	deleteQuery = `
-		DECLARE $dir_hash int64;
-		DECLARE $name AS Utf8;
-
-		DELETE FROM file_meta 
-		WHERE dir_hash == $dir_hash AND name == $name;
-		COMMIT;`
-	findQuery = `
-		DECLARE $dir_hash int64;
-		DECLARE $name AS Utf8;
-		
-		SELECT meta
-		FROM file_meta
-		WHERE dir_hash == $dir_hash AND name == $name;`
-)
-
 type YdbStore struct {
 	SupportBucketTable bool
 	DB                 *connect.Connection
@@ -148,7 +103,7 @@ func (store *YdbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (e
 			if err != nil {
 				return err
 			}
-			_, res, err = stmt.Execute(ctx, rwTX, table.NewQueryParameters(
+			_, res, err = stmt.Execute(ctx, roTX, table.NewQueryParameters(
 				table.ValueParam("$dir_hash", ydb.Int64Value(util.HashStringToLong(dir))),
 				table.ValueParam("$name", ydb.UTF8Value(name))))
 			return err
@@ -157,6 +112,8 @@ func (store *YdbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (e
 	if err != nil {
 		return nil, err
 	}
+	defer res.Close()
+
 	for res.NextSet() {
 		for res.NextRow() {
 			res.SeekItem("meta")
@@ -188,32 +145,105 @@ func (store *YdbStore) DeleteEntry(ctx context.Context, fullpath util.FullPath)
 }
 
 func (store *YdbStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
-	return nil
+	dir, _ := fullpath.DirAndName()
+	return table.Retry(ctx, store.DB.Table().Pool(),
+		table.OperationFunc(func(ctx context.Context, s *table.Session) (err error) {
+			stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), deleteFolderChildrenQuery))
+			if err != nil {
+				return err
+			}
+			_, _, err = stmt.Execute(ctx, rwTX, table.NewQueryParameters(
+				table.ValueParam("$dir_hash", ydb.Int64Value(util.HashStringToLong(dir))),
+				table.ValueParam("$directory", ydb.UTF8Value(dir))))
+			return err
+		}),
+	)
 }
 
 func (store *YdbStore) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
-	//TODO implement me
+	return store.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, "", nil)
-	panic("implement me")
 }
 
 func (store *YdbStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
-	//TODO implement me
+	dir := string(dirPath)
-	panic("implement me")
+	var res *table.Result
+	startFileCompOp := ">"
+	if includeStartFile {
+		startFileCompOp = ">="
+	}
+	err = table.Retry(ctx, store.DB.Table().Pool(),
+		table.OperationFunc(func(ctx context.Context, s *table.Session) (err error) {
+			stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), fmt.Sprintf(ListDirectoryQuery, startFileCompOp)))
+			if err != nil {
+				return err
+			}
+			_, res, err = stmt.Execute(ctx, roTX, table.NewQueryParameters(
+				table.ValueParam("$dir_hash", ydb.Int64Value(util.HashStringToLong(dir))),
+				table.ValueParam("$directory", ydb.UTF8Value(dir)),
+				table.ValueParam("$start_name", ydb.UTF8Value(startFileName)),
+				table.ValueParam("$prefix", ydb.UTF8Value(prefix)),
+				table.ValueParam("$limit", ydb.Int64Value(limit)),
+			))
+			return err
+		}),
+	)
+	if err != nil {
+		return lastFileName, err
+	}
+	defer res.Close()
+
+	for res.NextSet() {
+		for res.NextRow() {
+			res.SeekItem("name")
+			name := res.UTF8()
+			res.SeekItem("meta")
+			data := res.String()
+			if res.Err() != nil {
+				glog.V(0).Infof("scan %s : %v", dirPath, err)
+				return lastFileName, fmt.Errorf("scan %s: %v", dirPath, err)
+			}
+			lastFileName = name
+
+			entry := &filer.Entry{
+				FullPath: util.NewFullPath(dir, name),
+			}
+			if err = entry.DecodeAttributesAndChunks(util.MaybeDecompressData(data)); err != nil {
+				glog.V(0).Infof("scan decode %s : %v", entry.FullPath, err)
+				return lastFileName, fmt.Errorf("scan decode %s : %v", entry.FullPath, err)
+			}
+
+			if !eachEntryFunc(entry) {
+				break
+			}
+		}
+	}
+	return lastFileName, nil
 }
 
 func (store *YdbStore) BeginTransaction(ctx context.Context) (context.Context, error) {
-	//TODO implement me
+	session, err := store.DB.Table().Pool().Create(ctx)
-	panic("implement me")
+	if err != nil {
+		return ctx, err
+	}
+	tx, err := session.BeginTransaction(ctx, table.TxSettings(table.WithSerializableReadWrite()))
+	if err != nil {
+		return ctx, err
+	}
+	return context.WithValue(ctx, "tx", tx), nil
 }
 
 func (store *YdbStore) CommitTransaction(ctx context.Context) error {
-	//TODO implement me
+	if tx, ok := ctx.Value("tx").(*table.Transaction); ok {
-	panic("implement me")
+		return tx.Commit(ctx)
+	}
+	return nil
 }
 
 func (store *YdbStore) RollbackTransaction(ctx context.Context) error {
-	//TODO implement me
+	if tx, ok := ctx.Value("tx").(*table.Transaction); ok {
-	panic("implement me")
+		return tx.Rollback(ctx)
+	}
+	return nil
 }
 
 func (store *YdbStore) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
@@ -232,8 +262,7 @@ func (store *YdbStore) KvDelete(ctx context.Context, key []byte) (err error) {
 }
 
 func (store *YdbStore) Shutdown() {
-	//TODO implement me
+	store.DB.Close()
-	panic("implement me")
 }
 
 func (store *YdbStore) getPrefix(dir string) string {
@@ -249,8 +278,5 @@ func (store *YdbStore) getPrefix(dir string) string {
 }
 
 func (store *YdbStore) withPragma(prefix, query string) string {
-	if store.tablePathPrefix != "" && store.tablePathPrefix != "/" {
+	return `PRAGMA TablePathPrefix("` + path.Join(store.tablePathPrefix, prefix) + `");` + query
-		prefix = store.tablePathPrefix + "/" + prefix
-	}
-	return `PRAGMA TablePathPrefix("` + prefix + `");` + query
 }