zeroshade commented on code in PR #246: URL: https://github.com/apache/iceberg-go/pull/246#discussion_r1934571592
########## catalog/sql/sql.go: ########## @@ -0,0 +1,721 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +package sql + +import ( + "context" + "database/sql" + "errors" + "fmt" + "maps" + "path" + "slices" + "strings" + "sync" + _ "unsafe" + + "github.com/apache/iceberg-go" + "github.com/apache/iceberg-go/catalog" + "github.com/apache/iceberg-go/catalog/internal" + "github.com/apache/iceberg-go/io" + "github.com/apache/iceberg-go/table" + "github.com/uptrace/bun" + "github.com/uptrace/bun/dialect/feature" + "github.com/uptrace/bun/dialect/mssqldialect" + "github.com/uptrace/bun/dialect/mysqldialect" + "github.com/uptrace/bun/dialect/oracledialect" + "github.com/uptrace/bun/dialect/pgdialect" + "github.com/uptrace/bun/dialect/sqlitedialect" + "github.com/uptrace/bun/extra/bundebug" + "github.com/uptrace/bun/schema" +) + +type SupportedDialect string + +const ( + Postgres SupportedDialect = "postgres" + MySQL SupportedDialect = "mysql" + SQLite SupportedDialect = "sqlite" + MSSQL SupportedDialect = "mssql" + Oracle SupportedDialect = "oracle" +) + +const ( + DialectKey = "sql.dialect" + DriverKey = "sql.driver" + initCatalogTablesKey = "init_catalog_tables" +) + +func init() { + catalog.Register("sql", catalog.RegistrarFunc(func(name string, p iceberg.Properties) (c catalog.Catalog, err error) { + driver, ok := p[DriverKey] + if !ok { + return nil, errors.New("must provide driver to pass to sql.Open") + } + + dialect := strings.ToLower(p[DialectKey]) + if dialect == "" { + return nil, errors.New("must provide sql dialect to use") + } + + uri := strings.TrimPrefix(p.Get("uri", ""), "sql://") + sqldb, err := sql.Open(driver, uri) + if err != nil { + return nil, err + } + + defer func() { + if r := recover(); r != nil { + err = fmt.Errorf("failed to create SQL catalog: %v", r) + } + }() + + return NewCatalog(p.Get(name, "sql"), sqldb, SupportedDialect(dialect), p) + })) +} + +var ( + _ catalog.Catalog = (*Catalog)(nil) +) + +var ( + minimalNamespaceProps = iceberg.Properties{"exists": "true"} + + dialects = map[SupportedDialect]schema.Dialect{} + dialectMx sync.Mutex +) + +func createDialect(d SupportedDialect) schema.Dialect { + switch d { + case Postgres: + return pgdialect.New() + case MySQL: + return mysqldialect.New() + case SQLite: + return sqlitedialect.New() + case MSSQL: + return mssqldialect.New() + case Oracle: + return oracledialect.New() + default: + panic("unsupported sql dialect") + } +} + +func getDialect(d SupportedDialect) schema.Dialect { + dialectMx.Lock() + defer dialectMx.Unlock() + ret, ok := dialects[d] + if !ok { + ret = createDialect(d) + dialects[d] = ret + } + return ret +} + +type sqlIcebergTable struct { + bun.BaseModel `bun:"table:iceberg_tables"` + + CatalogName string `bun:",pk"` + TableNamespace string `bun:",pk"` + TableName string `bun:",pk"` + MetadataLocation sql.NullString + PreviousMetadataLocation sql.NullString +} + +type sqlIcebergNamespaceProps struct { + bun.BaseModel `bun:"table:iceberg_namespace_properties"` + + CatalogName string `bun:",pk"` + Namespace string `bun:",pk"` + PropertyKey string `bun:",pk"` + PropertyValue sql.NullString +} + +func withReadTx[R any](ctx context.Context, db *bun.DB, fn func(context.Context, bun.Tx) (R, error)) (result R, err error) { + db.RunInTx(ctx, &sql.TxOptions{ReadOnly: true}, func(ctx context.Context, tx bun.Tx) error { + result, err = fn(ctx, tx) + return err + }) + return +} + +func withWriteTx(ctx context.Context, db *bun.DB, fn func(context.Context, bun.Tx) error) error { + return db.RunInTx(ctx, &sql.TxOptions{Isolation: sql.LevelLinearizable}, func(ctx context.Context, tx bun.Tx) error { Review Comment: It's what made the most sense to me, unless you think I should just use `LevelDefault` and let the underlying DB decide? -- This is an automated message from the Apache Git Service. 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