DatabaseAdapter

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Summary

Runtime contract implemented by concrete database adapters.

Signature

interface DatabaseAdapter {
  capabilities: AdapterCapabilities;
  dialect: string;
  acquireMigrationLock(): Promise<void>;
  beginTransaction(options: TransactionOptions): Promise<TransactionToken>;
  commitTransaction(token: TransactionToken): Promise<void>;
  compileSql(
    operation:
      | SelectOperation<AnyTable>
      | CountOperation<AnyTable>
      | ExistsOperation<AnyTable>
      | InsertOperation<AnyTable>
      | InsertManyOperation<AnyTable>
      | UpdateOperation<AnyTable>
      | DeleteOperation<AnyTable>
      | UpsertOperation<AnyTable>
      | RawOperation
      | CreateTableOperation
      | AlterTableOperation
      | RenameTableOperation
      | DropTableOperation
      | CreateIndexOperation
      | DropIndexOperation
      | RenameIndexOperation
      | AddForeignKeyOperation
      | DropForeignKeyOperation
      | AddCheckOperation
      | DropCheckOperation,
  ): SqlStatement[];
  createSavepoint(token: TransactionToken, name: string): Promise<void>;
  execute(request: DataManipulationRequest): Promise<DataManipulationResult>;
  hasColumn(
    table: TableRef,
    column: string,
    transaction: TransactionToken,
  ): Promise<boolean>;
  hasTable(table: TableRef, transaction: TransactionToken): Promise<boolean>;
  migrate(request: DataMigrationRequest): Promise<DataMigrationResult>;
  releaseMigrationLock(): Promise<void>;
  releaseSavepoint(token: TransactionToken, name: string): Promise<void>;
  rollbackToSavepoint(token: TransactionToken, name: string): Promise<void>;
  rollbackTransaction(token: TransactionToken): Promise<void>;
}

Properties

capabilities

Feature flags describing the adapter's supported behaviors.

dialect

Database dialect name exposed by the adapter.

Methods

acquireMigrationLock(): Promise

Acquires the adapter's migration lock when supported.

beginTransaction(options: TransactionOptions): Promise

Starts a new database transaction.

options

commitTransaction(token: TransactionToken): Promise

Commits an open transaction.

token

compileSql(operation: SelectOperation | CountOperation | ExistsOperation | InsertOperation | InsertManyOperation | UpdateOperation | DeleteOperation | UpsertOperation | RawOperation | CreateTableOperation | AlterTableOperation | RenameTableOperation | DropTableOperation | CreateIndexOperation | DropIndexOperation | RenameIndexOperation | AddForeignKeyOperation | DropForeignKeyOperation | AddCheckOperation | DropCheckOperation): SqlStatement[]

Compiles a data or migration operation into executable SQL statements.

operation

createSavepoint(token: TransactionToken, name: string): Promise

Creates a savepoint inside an open transaction.

token

name

execute(request: DataManipulationRequest): Promise

Executes a data-manipulation request.

request

hasColumn(table: TableRef, column: string, transaction: TransactionToken): Promise

Checks whether a column exists on a table.

table

column

transaction

hasTable(table: TableRef, transaction: TransactionToken): Promise

Checks whether a table exists.

table

transaction

migrate(request: DataMigrationRequest): Promise

Executes a migration request.

request

releaseMigrationLock(): Promise

Releases the adapter's migration lock when supported.

releaseSavepoint(token: TransactionToken, name: string): Promise

Releases a previously created savepoint.

token

name

rollbackToSavepoint(token: TransactionToken, name: string): Promise

Rolls back to a previously created savepoint.

token

name

rollbackTransaction(token: TransactionToken): Promise

Rolls back an open transaction.

token