ydb Sql interface

2 files changed, 163 insertions, 65 deletions

diff --git a/weed/filer/ydb/ydb_queries.go b/weed/filer/ydb/ydb_queries.go
new file mode 100644
index 000000000..57b282a7a
--- /dev/null
+++ b/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;`
+)
diff --git a/weed/filer/ydb/ydb_store.go b/weed/filer/ydb/ydb_store.go
index 7278c6301..48017bf6f 100644
--- a/weed/filer/ydb/ydb_store.go
+++ b/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
-	panic("implement me")
+	return store.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, "", nil)
 }
 
 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
-	panic("implement me")
+	dir := string(dirPath)
+	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
-	panic("implement me")
+	session, err := store.DB.Table().Pool().Create(ctx)
+	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
-	panic("implement me")
+	if tx, ok := ctx.Value("tx").(*table.Transaction); ok {
+		return tx.Commit(ctx)
+	}
+	return nil
 }
 
 func (store *YdbStore) RollbackTransaction(ctx context.Context) error {
-	//TODO implement me
-	panic("implement me")
+	if tx, ok := ctx.Value("tx").(*table.Transaction); ok {
+		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
-	panic("implement me")
+	store.DB.Close()
 }
 
 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 != "/" {
-		prefix = store.tablePathPrefix + "/" + prefix
-	}
-	return `PRAGMA TablePathPrefix("` + prefix + `");` + query
+	return `PRAGMA TablePathPrefix("` + path.Join(store.tablePathPrefix, prefix) + `");` + query
 }