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import { QueryRunner } from "../query-runner/QueryRunner";
import { ColumnMetadata } from "../metadata/ColumnMetadata";
import { ObjectLiteral } from "../common/ObjectLiteral";
import { ColumnType } from "./types/ColumnTypes";
import { CteCapabilities } from "./types/CteCapabilities";
import { MappedColumnTypes } from "./types/MappedColumnTypes";
import { SchemaBuilder } from "../schema-builder/SchemaBuilder";
import { DataTypeDefaults } from "./types/DataTypeDefaults";
import { BaseDataSourceOptions } from "../data-source/BaseDataSourceOptions";
import { TableColumn } from "../schema-builder/table/TableColumn";
import { EntityMetadata } from "../metadata/EntityMetadata";
import { ReplicationMode } from "./types/ReplicationMode";
import { Table } from "../schema-builder/table/Table";
import { View } from "../schema-builder/view/View";
import { TableForeignKey } from "../schema-builder/table/TableForeignKey";
import { UpsertType } from "./types/UpsertType";
import { OnDeleteType } from "../metadata/types/OnDeleteType";
import { OnUpdateType } from "../metadata/types/OnUpdateType";
export type ReturningType = "insert" | "update" | "delete";
/**
* Driver organizes TypeORM communication with specific database management system.
*/
export interface Driver {
/**
* Connection options.
*/
options: BaseDataSourceOptions;
/**
* Database version/release. Often requires a SQL query to the DB, so it is not always set
*/
version?: string;
/**
* Database name used to perform all write queries.
*
* todo: probably move into query runner.
*/
database?: string;
/**
* Schema name used to perform all write queries.
*/
schema?: string;
/**
* Indicates if replication is enabled.
*/
isReplicated: boolean;
/**
* Indicates if tree tables are supported by this driver.
*/
treeSupport: boolean;
/**
* Represent transaction support by this driver
*/
transactionSupport: "simple" | "nested" | "none";
/**
* Gets list of supported column data types by a driver.
*/
supportedDataTypes: ColumnType[];
/**
* Returns type of upsert supported by driver if any
*/
supportedUpsertTypes: UpsertType[];
/**
* Returns list of supported onDelete types by driver
*/
supportedOnDeleteTypes?: OnDeleteType[];
/**
* Returns list of supported onUpdate types by driver
*/
supportedOnUpdateTypes?: OnUpdateType[];
/**
* Default values of length, precision and scale depends on column data type.
* Used in the cases when length/precision/scale is not specified by user.
*/
dataTypeDefaults: DataTypeDefaults;
/**
* Gets list of spatial column data types.
*/
spatialTypes: ColumnType[];
/**
* Gets list of column data types that support length by a driver.
*/
withLengthColumnTypes: ColumnType[];
/**
* Gets list of column data types that support precision by a driver.
*/
withPrecisionColumnTypes: ColumnType[];
/**
* Gets list of column data types that support scale by a driver.
*/
withScaleColumnTypes: ColumnType[];
/**
* Orm has special columns and we need to know what database column types should be for those types.
* Column types are driver dependant.
*/
mappedDataTypes: MappedColumnTypes;
/**
* The prefix used for the parameters
*/
parametersPrefix?: string;
/**
* Max length allowed by the DBMS for aliases (execution of queries).
*/
maxAliasLength?: number;
cteCapabilities: CteCapabilities;
/**
* Dummy table name
*/
dummyTableName?: string;
/**
* Performs connection to the database.
* Depend on driver type it may create a connection pool.
*/
connect(): Promise<void>;
/**
* Makes any action after connection (e.g. create extensions in Postgres driver).
*/
afterConnect(): Promise<void>;
/**
* Closes connection with database and releases all resources.
*/
disconnect(): Promise<void>;
/**
* Synchronizes database schema (creates tables, indices, etc).
*/
createSchemaBuilder(): SchemaBuilder;
/**
* Creates a query runner used for common queries.
*/
createQueryRunner(mode: ReplicationMode): QueryRunner;
/**
* Replaces parameters in the given sql with special escaping character
* and an array of parameter names to be passed to a query.
*/
escapeQueryWithParameters(sql: string, parameters: ObjectLiteral, nativeParameters: ObjectLiteral): [string, any[]];
/**
* Escapes a table name, column name or an alias.
*
* todo: probably escape should be able to handle dots in the names and automatically escape them
*/
escape(name: string): string;
/**
* Build full table name with database name, schema name and table name.
* E.g. myDB.mySchema.myTable
*/
buildTableName(tableName: string, schema?: string, database?: string): string;
/**
* Parse a target table name or other types and return a normalized table definition.
*/
parseTableName(target: EntityMetadata | Table | View | TableForeignKey | string): {
tableName: string;
schema?: string;
database?: string;
};
/**
* Prepares given value to a value to be persisted, based on its column type and metadata.
*/
preparePersistentValue(value: any, column: ColumnMetadata): any;
/**
* Prepares given value to a value to be persisted, based on its column type.
*/
prepareHydratedValue(value: any, column: ColumnMetadata): any;
/**
* Transforms type of the given column to a database column type.
*/
normalizeType(column: {
type?: ColumnType | string;
length?: number | string;
precision?: number | null;
scale?: number;
isArray?: boolean;
}): string;
/**
* Normalizes "default" value of the column.
*/
normalizeDefault(columnMetadata: ColumnMetadata): string | undefined;
/**
* Normalizes "isUnique" value of the column.
*/
normalizeIsUnique(column: ColumnMetadata): boolean;
/**
* Calculates column length taking into account the default length values.
*/
getColumnLength(column: ColumnMetadata): string;
/**
* Normalizes "default" value of the column.
*/
createFullType(column: TableColumn): string;
/**
* Obtains a new database connection to a master server.
* Used for replication.
* If replication is not setup then returns default connection's database connection.
*/
obtainMasterConnection(): Promise<any>;
/**
* Obtains a new database connection to a slave server.
* Used for replication.
* If replication is not setup then returns master (default) connection's database connection.
*/
obtainSlaveConnection(): Promise<any>;
/**
* Creates generated map of values generated or returned by database after INSERT query.
*/
createGeneratedMap(metadata: EntityMetadata, insertResult: any, entityIndex?: number, entityNum?: number): ObjectLiteral | undefined;
/**
* Differentiate columns of this table and columns from the given column metadatas columns
* and returns only changed.
*/
findChangedColumns(tableColumns: TableColumn[], columnMetadatas: ColumnMetadata[]): ColumnMetadata[];
/**
* Returns true if driver supports RETURNING / OUTPUT statement.
*/
isReturningSqlSupported(returningType: ReturningType): boolean;
/**
* Returns true if driver supports uuid values generation on its own.
*/
isUUIDGenerationSupported(): boolean;
/**
* Returns true if driver supports fulltext indices.
*/
isFullTextColumnTypeSupported(): boolean;
/**
* Creates an escaped parameter.
*/
createParameter(parameterName: string, index: number): string;
}