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catalog.go
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catalog.go
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// Copyright 2021 Dolthub, Inc.
//
// Licensed 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
type Catalog interface {
// AllDatabases returns all databases known to this catalog
AllDatabases() []Database
// HasDB returns whether a db with the name given exists, case-insensitive
HasDB(db string) bool
// Database returns the database with the name given, case-insensitive, or an error if it doesn't exist
Database(db string) (Database, error)
// CreateDatabase creates a new database, or returns an error if the operation isn't supported or fails.
CreateDatabase(ctx *Context, dbName string) error
// RemoveDatabase removes the database named, or returns an error if the operation isn't supported or fails.
RemoveDatabase(ctx *Context, dbName string) error
// Table returns the table with the name given in the db with the name given
Table(ctx *Context, dbName, tableName string) (Table, Database, error)
// TableAsOf returns the table with the name given in the db with the name given, as of the given marker
TableAsOf(ctx *Context, dbName, tableName string, asOf interface{}) (Table, Database, error)
// Function returns the function with the name given, or sql.ErrFunctionNotFound if it doesn't exist
Function(name string) (Function, error)
// RegisterFunction registers the functions given, adding them to the built-in functions.
// Integrators with custom functions should typically use the FunctionProvider interface to register their functions.
RegisterFunction(fns ...Function)
// LockTable locks the table named
LockTable(ctx *Context, table string)
// UnlockTables unlocks all tables locked by the session id given
UnlockTables(ctx *Context, id uint32) error
}