typeorm
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Data-Mapper ORM for TypeScript and ES2023+. Supports MySQL/MariaDB, PostgreSQL, MS SQL Server, Oracle, SAP HANA, SQLite, MongoDB databases.
880 lines • 32.9 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AuroraMysqlDriver = void 0;
const error_1 = require("../../error");
const PlatformTools_1 = require("../../platform/PlatformTools");
const RdbmsSchemaBuilder_1 = require("../../schema-builder/RdbmsSchemaBuilder");
const ApplyValueTransformers_1 = require("../../util/ApplyValueTransformers");
const DateUtils_1 = require("../../util/DateUtils");
const InstanceChecker_1 = require("../../util/InstanceChecker");
const OrmUtils_1 = require("../../util/OrmUtils");
const DriverUtils_1 = require("../DriverUtils");
const AuroraMysqlQueryRunner_1 = require("./AuroraMysqlQueryRunner");
/**
* Organizes communication with MySQL DBMS.
*/
class AuroraMysqlDriver {
// -------------------------------------------------------------------------
// Static Properties
// -------------------------------------------------------------------------
/**
* Aurora MySQL cannot honor per-transaction isolation levels over the RDS
* Data API: BeginTransaction accepts no isolation parameter, the API is
* stateless so a preceding `SET TRANSACTION` has no guaranteed connection
* affinity to the subsequent BeginTransaction, multi-statement SQL is
* rejected, and MySQL disallows `SET TRANSACTION` inside an active
* transaction (error 1568). See the transactions documentation for links.
*/
static { this.supportedIsolationLevels = []; }
/**
* DataSource used by the driver.
*
* @deprecated since 1.0.0. Use {@link dataSource} instance instead.
*/
get connection() {
return this.dataSource;
}
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(dataSource) {
/**
* Isolation levels supported by this driver.
*/
this.supportedIsolationLevels = AuroraMysqlDriver.supportedIsolationLevels;
/**
* Indicates if replication is enabled.
*/
this.isReplicated = false;
/**
* Indicates if tree tables are supported by this driver.
*/
this.treeSupport = true;
/**
* Represent transaction support by this driver
*/
this.transactionSupport = "nested";
/**
* Gets list of supported column data types by a driver.
*
* @see https://www.tutorialspoint.com/mysql/mysql-data-types.htm
* @see https://dev.mysql.com/doc/refman/8.0/en/data-types.html
*/
this.supportedDataTypes = [
// numeric types
"bit",
"int",
"integer", // synonym for int
"tinyint",
"smallint",
"mediumint",
"bigint",
"float",
"double",
"double precision", // synonym for double
"real", // synonym for double
"decimal",
"dec", // synonym for decimal
"numeric", // synonym for decimal
"fixed", // synonym for decimal
"bool", // synonym for tinyint
"boolean", // synonym for tinyint
// date and time types
"date",
"datetime",
"timestamp",
"time",
"year",
// string types
"char",
"nchar", // synonym for national char
"national char",
"varchar",
"nvarchar", // synonym for national varchar
"national varchar",
"blob",
"text",
"tinyblob",
"tinytext",
"mediumblob",
"mediumtext",
"longblob",
"longtext",
"enum",
"set",
"binary",
"varbinary",
// json data type
"json",
// spatial data types
"geometry",
"point",
"linestring",
"polygon",
"multipoint",
"multilinestring",
"multipolygon",
"geometrycollection",
];
/**
* Returns type of upsert supported by driver if any
*/
this.supportedUpsertTypes = ["on-duplicate-key-update"];
/**
* Gets list of spatial column data types.
*/
this.spatialTypes = [
"geometry",
"point",
"linestring",
"polygon",
"multipoint",
"multilinestring",
"multipolygon",
"geometrycollection",
];
/**
* Gets list of column data types that support length by a driver.
*/
this.withLengthColumnTypes = [
"char",
"varchar",
"nvarchar",
"binary",
"varbinary",
];
/**
* Gets list of column data types that support precision by a driver.
*/
this.withPrecisionColumnTypes = [
"decimal",
"dec",
"numeric",
"fixed",
"float",
"double",
"double precision",
"real",
"time",
"datetime",
"timestamp",
];
/**
* Gets list of column data types that supports scale by a driver.
*/
this.withScaleColumnTypes = [
"decimal",
"dec",
"numeric",
"fixed",
"float",
"double",
"double precision",
"real",
];
/**
* ORM has special columns and we need to know what database column types should be for those columns.
* Column types are driver dependant.
*/
this.mappedDataTypes = {
createDate: "datetime",
createDatePrecision: 6,
createDateDefault: "CURRENT_TIMESTAMP(6)",
updateDate: "datetime",
updateDatePrecision: 6,
updateDateDefault: "CURRENT_TIMESTAMP(6)",
deleteDate: "datetime",
deleteDatePrecision: 6,
deleteDateNullable: true,
version: "int",
treeLevel: "int",
migrationId: "int",
migrationName: "varchar",
migrationTimestamp: "bigint",
cacheId: "int",
cacheIdentifier: "varchar",
cacheTime: "bigint",
cacheDuration: "int",
cacheQuery: "text",
cacheResult: "text",
metadataType: "varchar",
metadataDatabase: "varchar",
metadataSchema: "varchar",
metadataTable: "varchar",
metadataName: "varchar",
metadataValue: "text",
};
/**
* 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.
*/
this.dataTypeDefaults = {
varchar: { length: 255 },
nvarchar: { length: 255 },
"national varchar": { length: 255 },
char: { length: 1 },
binary: { length: 1 },
varbinary: { length: 255 },
decimal: { precision: 10, scale: 0 },
dec: { precision: 10, scale: 0 },
numeric: { precision: 10, scale: 0 },
fixed: { precision: 10, scale: 0 },
float: { precision: 12 },
double: { precision: 22 },
time: { precision: 0 },
datetime: { precision: 0 },
timestamp: { precision: 0 },
};
/**
* Max length allowed by MySQL for aliases.
*
* @see https://dev.mysql.com/doc/refman/5.5/en/identifiers.html
*/
this.maxAliasLength = 63;
this.cteCapabilities = {
enabled: false,
};
this.dataSource = dataSource;
this.options = dataSource.options;
// load mysql package
this.loadDependencies();
this.client = new this.DataApiDriver(this.options.region, this.options.secretArn, this.options.resourceArn, this.options.database, (query, parameters) => this.dataSource.logger.logQuery(query, parameters), this.options.serviceConfigOptions, this.options.formatOptions);
this.database = DriverUtils_1.DriverUtils.buildDriverOptions(this.options).database;
// validate options to make sure everything is set
// todo: revisit validation with replication in mind
// if (!(this.options.host || (this.options.extra && this.options.extra.socketPath)) && !this.options.socketPath)
// throw new DriverOptionNotSetError("socketPath and host");
// if (!this.options.username)
// throw new DriverOptionNotSetError("username");
// if (!this.options.database)
// throw new DriverOptionNotSetError("database");
// todo: check what is going on when connection is setup without database and how to connect to a database then?
// todo: provide options to auto-create a database if it does not exist yet
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Performs connection to the database.
*/
async connect() {
if (!this.database) {
const queryRunner = this.createQueryRunner("master");
this.database = await queryRunner.getCurrentDatabase();
await queryRunner.release();
}
}
/**
* Makes any action after connection (e.g. create extensions in Postgres driver).
*/
afterConnect() {
return Promise.resolve();
}
/**
* Closes connection with the database.
*/
async disconnect() { }
/**
* Creates a schema builder used to build and sync a schema.
*/
createSchemaBuilder() {
return new RdbmsSchemaBuilder_1.RdbmsSchemaBuilder(this.dataSource);
}
/**
* Creates a query runner used to execute database queries.
*
* @param mode
*/
createQueryRunner(mode) {
return new AuroraMysqlQueryRunner_1.AuroraMysqlQueryRunner(this, new this.DataApiDriver(this.options.region, this.options.secretArn, this.options.resourceArn, this.options.database, (query, parameters) => this.dataSource.logger.logQuery(query, parameters), this.options.serviceConfigOptions, this.options.formatOptions));
}
/**
* Replaces parameters in the given sql with special escaping character
* and an array of parameter names to be passed to a query.
*
* @param sql
* @param parameters
*/
escapeQueryWithParameters(sql, parameters) {
const escapedParameters = [];
if (!parameters || !Object.keys(parameters).length)
return [sql, escapedParameters];
sql = sql.replaceAll(/:(\.\.\.)?([A-Za-z0-9_.]+)/g, (full, isArray, key) => {
if (!parameters.hasOwnProperty(key)) {
return full;
}
const value = parameters[key];
if (isArray) {
return value
.map((v) => {
escapedParameters.push(v);
return this.createParameter(key, escapedParameters.length - 1);
})
.join(", ");
}
if (typeof value === "function") {
return value();
}
escapedParameters.push(value);
return this.createParameter(key, escapedParameters.length - 1);
}); // todo: make replace only in value statements, otherwise problems
return [sql, escapedParameters];
}
/**
* Escapes a column name.
*
* @param columnName
*/
escape(columnName) {
return "`" + columnName.replaceAll("`", "``") + "`";
}
/**
* Build full table name with database name, schema name and table name.
* E.g. myDB.mySchema.myTable
*
* @param tableName
* @param schema
* @param database
*/
buildTableName(tableName, schema, database) {
const tablePath = [tableName];
if (database) {
tablePath.unshift(database);
}
return tablePath.join(".");
}
/**
* Parse a target table name or other types and return a normalized table definition.
*
* @param target
*/
parseTableName(target) {
const driverDatabase = this.database;
const driverSchema = undefined;
if (InstanceChecker_1.InstanceChecker.isTable(target) || InstanceChecker_1.InstanceChecker.isView(target)) {
const parsed = this.parseTableName(target.name);
return {
database: target.database ?? parsed.database ?? driverDatabase,
schema: target.schema ?? parsed.schema ?? driverSchema,
tableName: parsed.tableName,
};
}
if (InstanceChecker_1.InstanceChecker.isTableForeignKey(target)) {
const parsed = this.parseTableName(target.referencedTableName);
return {
database: target.referencedDatabase ??
parsed.database ??
driverDatabase,
schema: target.referencedSchema ?? parsed.schema ?? driverSchema,
tableName: parsed.tableName,
};
}
if (InstanceChecker_1.InstanceChecker.isEntityMetadata(target)) {
// EntityMetadata tableName is never a path
return {
database: target.database ?? driverDatabase,
schema: target.schema ?? driverSchema,
tableName: target.tableName,
};
}
const parts = target.split(".");
return {
database: (parts.length > 1 ? parts[0] : undefined) ?? driverDatabase,
schema: driverSchema,
tableName: parts.length > 1 ? parts[1] : parts[0],
};
}
/**
* Prepares given value to a value to be persisted, based on its column type and metadata.
*
* @param value
* @param columnMetadata
*/
preparePersistentValue(value, columnMetadata) {
if (columnMetadata.transformer)
value = ApplyValueTransformers_1.ApplyValueTransformers.transformTo(columnMetadata.transformer, value);
if (this.options.formatOptions?.castParameters !== false) {
return this.client.preparePersistentValue(value, columnMetadata);
}
if (value === null || value === undefined)
return value;
if (columnMetadata.type === Boolean) {
return value === true ? 1 : 0;
}
else if (columnMetadata.type === "date") {
return DateUtils_1.DateUtils.mixedDateToDateString(value, {
utc: columnMetadata.utc,
});
}
else if (columnMetadata.type === "time") {
return DateUtils_1.DateUtils.mixedDateToTimeString(value);
}
else if (columnMetadata.type === "json") {
return JSON.stringify(value);
}
else if (columnMetadata.type === "timestamp" ||
columnMetadata.type === "datetime" ||
columnMetadata.type === Date) {
return DateUtils_1.DateUtils.mixedDateToDate(value);
}
else if (columnMetadata.type === "simple-array" ||
columnMetadata.type === "set") {
return DateUtils_1.DateUtils.simpleArrayToString(value);
}
else if (columnMetadata.type === "simple-json") {
return DateUtils_1.DateUtils.simpleJsonToString(value);
}
else if (columnMetadata.type === "enum" ||
columnMetadata.type === "simple-enum") {
return "" + value;
}
return value;
}
/**
* Prepares given value to a value to be persisted, based on its column type or metadata.
*
* @param value
* @param columnMetadata
*/
prepareHydratedValue(value, columnMetadata) {
if (value === null || value === undefined)
return columnMetadata.transformer
? ApplyValueTransformers_1.ApplyValueTransformers.transformFrom(columnMetadata.transformer, value)
: value;
if (this.options.formatOptions?.castParameters !== false) {
return this.client.prepareHydratedValue(value, columnMetadata);
}
if (columnMetadata.type === Boolean ||
columnMetadata.type === "bool" ||
columnMetadata.type === "boolean") {
value = value ? true : false;
}
else if (columnMetadata.type === "datetime" ||
columnMetadata.type === Date) {
value = DateUtils_1.DateUtils.normalizeHydratedDate(value);
}
else if (columnMetadata.type === "date") {
value = DateUtils_1.DateUtils.mixedDateToDateString(value, {
utc: columnMetadata.utc,
});
}
else if (columnMetadata.type === "json") {
value = typeof value === "string" ? JSON.parse(value) : value;
}
else if (columnMetadata.type === "time") {
value = DateUtils_1.DateUtils.mixedTimeToString(value);
}
else if (columnMetadata.type === "simple-array" ||
columnMetadata.type === "set") {
value = DateUtils_1.DateUtils.stringToSimpleArray(value);
}
else if (columnMetadata.type === "simple-json") {
value = DateUtils_1.DateUtils.stringToSimpleJson(value);
}
else if ((columnMetadata.type === "enum" ||
columnMetadata.type === "simple-enum") &&
columnMetadata.enum &&
!isNaN(value) &&
columnMetadata.enum.indexOf(parseInt(value)) >= 0) {
// convert to number if that exists in possible enum options
value = parseInt(value);
}
else if (columnMetadata.type === Number) {
// convert to number if number
value = !isNaN(+value) ? parseInt(value) : value;
}
if (columnMetadata.transformer)
value = ApplyValueTransformers_1.ApplyValueTransformers.transformFrom(columnMetadata.transformer, value);
return value;
}
/**
* Creates a database type from a given column metadata.
*
* @param column
* @param column.type
* @param column.length
* @param column.precision
* @param column.scale
*/
normalizeType(column) {
if (column.type === Number || column.type === "integer") {
return "int";
}
else if (column.type === String) {
return "varchar";
}
else if (column.type === Date) {
return "datetime";
}
else if (
// (column.type as any) === Uint8Array ||
// (typeof Buffer !== "undefined" && (column.type as any) === Buffer)
typeof column.type === "function" &&
column.type.prototype instanceof Uint8Array) {
return "blob";
}
else if (column.type === Boolean) {
return "tinyint";
}
else if (column.type === "uuid") {
return "varchar";
}
else if (column.type === "simple-array" ||
column.type === "simple-json") {
return "text";
}
else if (column.type === "simple-enum") {
return "enum";
}
else if (column.type === "double precision" ||
column.type === "real") {
return "double";
}
else if (column.type === "dec" ||
column.type === "numeric" ||
column.type === "fixed") {
return "decimal";
}
else if (column.type === "bool" || column.type === "boolean") {
return "tinyint";
}
else if (column.type === "nvarchar" ||
column.type === "national varchar") {
return "varchar";
}
else if (column.type === "nchar" || column.type === "national char") {
return "char";
}
else {
return column.type || "";
}
}
/**
* Normalizes "default" value of the column.
*
* @param columnMetadata
*/
normalizeDefault(columnMetadata) {
const defaultValue = columnMetadata.default;
if (defaultValue === null) {
return undefined;
}
if ((columnMetadata.type === "enum" ||
columnMetadata.type === "simple-enum") &&
defaultValue !== undefined) {
return `'${defaultValue}'`;
}
if (columnMetadata.type === "set" && defaultValue !== undefined) {
return `'${DateUtils_1.DateUtils.simpleArrayToString(defaultValue)}'`;
}
if (typeof defaultValue === "number") {
return `${defaultValue}`;
}
if (typeof defaultValue === "boolean") {
return defaultValue ? "1" : "0";
}
if (typeof defaultValue === "function") {
return defaultValue();
}
if (typeof defaultValue === "string") {
return `'${defaultValue}'`;
}
if (defaultValue === undefined) {
return undefined;
}
return `${defaultValue}`;
}
/**
* Normalizes "isUnique" value of the column.
*
* @param column
*/
normalizeIsUnique(column) {
return column.entityMetadata.indices.some((idx) => idx.isUnique &&
idx.columns.length === 1 &&
idx.columns[0] === column);
}
/**
* Returns default column lengths, which is required on column creation.
*
* @param column
*/
getColumnLength(column) {
if (column.length)
return column.length.toString();
/**
* fix https://github.com/typeorm/typeorm/issues/1139
*/
if (column.generationStrategy === "uuid")
return "36";
switch (column.type) {
case String:
case "varchar":
case "nvarchar":
case "national varchar":
return "255";
case "varbinary":
return "255";
default:
return "";
}
}
/**
* Creates column type definition including length, precision and scale
*
* @param column
*/
createFullType(column) {
let type = column.type;
// used 'getColumnLength()' method, because MySQL requires column length for `varchar`, `nvarchar` and `varbinary` data types
if (this.getColumnLength(column)) {
type += `(${this.getColumnLength(column)})`;
}
else if (column.precision !== null &&
column.precision !== undefined &&
column.scale !== null &&
column.scale !== undefined) {
type += `(${column.precision},${column.scale})`;
}
else if (column.precision !== null &&
column.precision !== undefined) {
type += `(${column.precision})`;
}
if (column.isArray)
type += " array";
return type;
}
/**
* 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() {
return new Promise((ok, fail) => {
if (this.poolCluster) {
this.poolCluster.getConnection("MASTER", (err, dbConnection) => {
if (err) {
fail(err);
}
else {
ok(this.prepareDbConnection(dbConnection));
}
});
}
else if (this.pool) {
this.pool.getConnection((err, dbConnection) => {
if (err) {
fail(err);
}
else {
ok(this.prepareDbConnection(dbConnection));
}
});
}
else {
fail(new error_1.TypeORMError(`Connection is not established with mysql database`));
}
});
}
/**
* 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() {
if (!this.poolCluster)
return this.obtainMasterConnection();
return new Promise((ok, fail) => {
this.poolCluster.getConnection("SLAVE*", (err, dbConnection) => {
if (err) {
fail(err);
}
else {
ok(this.prepareDbConnection(dbConnection));
}
});
});
}
/**
* Creates generated map of values generated or returned by database after INSERT query.
*
* @param metadata
* @param insertResult
* @param entityIndex
*/
createGeneratedMap(metadata, insertResult, entityIndex) {
const generatedMap = metadata.generatedColumns.reduce((map, generatedColumn) => {
let value;
if (generatedColumn.generationStrategy === "increment" &&
insertResult.insertId) {
// NOTE: When multiple rows is inserted by a single INSERT statement,
// `insertId` is the value generated for the first inserted row only.
value = insertResult.insertId + entityIndex;
// } else if (generatedColumn.generationStrategy === "uuid") {
// console.log("getting db value:", generatedColumn.databaseName);
// value = generatedColumn.getEntityValue(uuidMap);
}
return OrmUtils_1.OrmUtils.mergeDeep(map, generatedColumn.createValueMap(value));
}, {});
return Object.keys(generatedMap).length > 0 ? generatedMap : undefined;
}
/**
* Differentiate columns of this table and columns from the given column metadatas columns
* and returns only changed.
*
* @param tableColumns
* @param columnMetadatas
*/
findChangedColumns(tableColumns, columnMetadatas) {
return columnMetadatas.filter((columnMetadata) => {
const tableColumn = tableColumns.find((c) => c.name === columnMetadata.databaseName);
if (!tableColumn)
return false; // we don't need new columns, we only need exist and changed
let columnMetadataLength = columnMetadata.length;
if (!columnMetadataLength &&
columnMetadata.generationStrategy === "uuid") {
// fixing #3374
columnMetadataLength = this.getColumnLength(columnMetadata);
}
return (tableColumn.name !== columnMetadata.databaseName ||
tableColumn.type !== this.normalizeType(columnMetadata) ||
tableColumn.length !== columnMetadataLength ||
tableColumn.precision !== columnMetadata.precision ||
tableColumn.scale !== columnMetadata.scale ||
tableColumn.unsigned !== columnMetadata.unsigned ||
tableColumn.asExpression !== columnMetadata.asExpression ||
tableColumn.generatedType !== columnMetadata.generatedType ||
tableColumn.comment !==
this.escapeComment(columnMetadata.comment) ||
!this.compareDefaultValues(this.normalizeDefault(columnMetadata), tableColumn.default) ||
!!(tableColumn.enum &&
columnMetadata.enum &&
!OrmUtils_1.OrmUtils.isArraysEqual(tableColumn.enum, columnMetadata.enum.map((val) => val + ""))) ||
tableColumn.onUpdate !== columnMetadata.onUpdate ||
tableColumn.isPrimary !== columnMetadata.isPrimary ||
tableColumn.isNullable !== columnMetadata.isNullable ||
tableColumn.isUnique !==
this.normalizeIsUnique(columnMetadata) ||
(columnMetadata.generationStrategy !== "uuid" &&
tableColumn.isGenerated !== columnMetadata.isGenerated));
});
}
/**
* Returns true if driver supports RETURNING / OUTPUT statement.
*/
isReturningSqlSupported() {
return false;
}
/**
* Returns true if driver supports uuid values generation on its own.
*/
isUUIDGenerationSupported() {
return false;
}
/**
* Returns true if driver supports fulltext indices.
*/
isFullTextColumnTypeSupported() {
return true;
}
/**
* Creates an escaped parameter.
*
* @param parameterName
* @param index
*/
createParameter(parameterName, index) {
return "?";
}
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Loads all driver dependencies.
*/
loadDependencies() {
const DataApiDriver = this.options.driver ??
PlatformTools_1.PlatformTools.load("typeorm-aurora-data-api-driver");
this.DataApiDriver = DataApiDriver;
// Driver uses rollup for publishing, which has issues when using typeorm in combination with webpack
// See https://github.com/webpack/webpack/issues/4742#issuecomment-295556787
this.DataApiDriver = this.DataApiDriver.default ?? this.DataApiDriver;
}
/**
* Creates a new connection pool for a given database credentials.
*
* @param options
* @param credentials
*/
createConnectionOptions(options, credentials) {
credentials = Object.assign({}, credentials, DriverUtils_1.DriverUtils.buildDriverOptions(credentials)); // todo: do it better way
// build connection options for the driver
return Object.assign({}, {
resourceArn: options.resourceArn,
secretArn: options.secretArn,
database: options.database,
region: options.region,
type: options.type,
}, {
host: credentials.host,
user: credentials.username,
password: credentials.password,
database: credentials.database,
port: credentials.port,
ssl: options.ssl,
}, options.extra ?? {});
}
/**
* Creates a new connection pool for a given database credentials.
*
* @param connectionOptions
*/
async createPool(connectionOptions) {
return {};
}
/**
* Attaches all required base handlers to a database connection, such as the unhandled error handler.
*
* @param connection
*/
prepareDbConnection(connection) {
const { logger } = this.dataSource;
/**
* Attaching an error handler to connection errors is essential, as, otherwise, errors raised will go unhandled and
* cause the hosting app to crash.
*/
if (connection.listeners("error").length === 0) {
connection.on("error", (error) => logger.log("warn", `MySQL connection raised an error. ${error}`));
}
return connection;
}
/**
* Checks if "DEFAULT" values in the column metadata and in the database are equal.
*
* @param columnMetadataValue
* @param databaseValue
*/
compareDefaultValues(columnMetadataValue, databaseValue) {
if (typeof columnMetadataValue === "string" &&
typeof databaseValue === "string") {
// we need to cut out "'" because in mysql we can understand returned value is a string or a function
// as result compare cannot understand if default is really changed or not
columnMetadataValue = columnMetadataValue.replaceAll(/^'+|'+$/g, "");
databaseValue = databaseValue.replaceAll(/^'+|'+$/g, "");
}
return columnMetadataValue === databaseValue;
}
/**
* Escapes a given comment.
*
* @param comment
*/
escapeComment(comment) {
if (!comment)
return comment;
comment = comment.replaceAll("\u0000", ""); // Null bytes aren't allowed in comments
return comment;
}
}
exports.AuroraMysqlDriver = AuroraMysqlDriver;
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