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{Driver} from \"../Driver\";\nimport {ConnectionIsNotSetError} from \"../../error/ConnectionIsNotSetError\";\nimport {DriverPackageNotInstalledError} from \"../../error/DriverPackageNotInstalledError\";\nimport {DriverUtils} from \"../DriverUtils\";\nimport {MysqlQueryRunner} from \"./MysqlQueryRunner\";\nimport {ObjectLiteral} from \"../../common/ObjectLiteral\";\nimport {ColumnMetadata} from \"../../metadata/ColumnMetadata\";\nimport {DateUtils} from \"../../util/DateUtils\";\nimport {PlatformTools} from \"../../platform/PlatformTools\";\nimport {Connection} from \"../../connection/Connection\";\nimport {RdbmsSchemaBuilder} from \"../../schema-builder/RdbmsSchemaBuilder\";\nimport {MysqlConnectionOptions} from \"./MysqlConnectionOptions\";\nimport {MappedColumnTypes} from \"../types/MappedColumnTypes\";\nimport {ColumnType} from \"../types/ColumnTypes\";\nimport {DataTypeDefaults} from \"../types/DataTypeDefaults\";\nimport {TableColumn} from \"../../schema-builder/table/TableColumn\";\nimport {MysqlConnectionCredentialsOptions} from \"./MysqlConnectionCredentialsOptions\";\nimport {EntityMetadata} from \"../../metadata/EntityMetadata\";\nimport {OrmUtils} from \"../../util/OrmUtils\";\nimport {ApplyValueTransformers} from \"../../util/ApplyValueTransformers\";\n\n/**\n * Organizes communication with MySQL DBMS.\n */\nexport class MysqlDriver implements Driver {\n\n // -------------------------------------------------------------------------\n // Public Properties\n // -------------------------------------------------------------------------\n\n /**\n * Connection used by driver.\n */\n connection: Connection;\n\n /**\n * Mysql underlying library.\n */\n mysql: any;\n\n /**\n * Connection pool.\n * Used in non-replication mode.\n */\n pool: any;\n\n /**\n * Pool cluster used in replication mode.\n */\n poolCluster: any;\n\n // -------------------------------------------------------------------------\n // Public Implemented Properties\n // -------------------------------------------------------------------------\n\n /**\n * Connection options.\n */\n options: MysqlConnectionOptions;\n\n /**\n * Master database used to perform all write queries.\n */\n database?: string;\n\n /**\n * Indicates if replication is enabled.\n */\n isReplicated: boolean = false;\n\n /**\n * Indicates if tree tables are supported by this driver.\n */\n treeSupport = true;\n\n /**\n * Gets list of supported column data types by a driver.\n *\n * @see https://www.tutorialspoint.com/mysql/mysql-data-types.htm\n * @see https://dev.mysql.com/doc/refman/8.0/en/data-types.html\n */\n supportedDataTypes: ColumnType[] = [\n // numeric types\n \"bit\",\n \"int\",\n \"integer\", // synonym for int\n \"tinyint\",\n \"smallint\",\n \"mediumint\",\n \"bigint\",\n \"float\",\n \"double\",\n \"double precision\", // synonym for double\n \"real\", // synonym for double\n \"decimal\",\n \"dec\", // synonym for decimal\n \"numeric\", // synonym for decimal\n \"fixed\", // synonym for decimal\n \"bool\", // synonym for tinyint\n \"boolean\", // synonym for tinyint\n // date and time types\n \"date\",\n \"datetime\",\n \"timestamp\",\n \"time\",\n \"year\",\n // string types\n \"char\",\n \"nchar\", // synonym for national char\n \"national char\",\n \"varchar\",\n \"nvarchar\", // synonym for national varchar\n \"national varchar\",\n \"blob\",\n \"text\",\n \"tinyblob\",\n \"tinytext\",\n \"mediumblob\",\n \"mediumtext\",\n \"longblob\",\n \"longtext\",\n \"enum\",\n \"binary\",\n \"varbinary\",\n // json data type\n \"json\",\n // spatial data types\n \"geometry\",\n \"point\",\n \"linestring\",\n \"polygon\",\n \"multipoint\",\n \"multilinestring\",\n \"multipolygon\",\n \"geometrycollection\"\n ];\n\n /**\n * Gets list of spatial column data types.\n */\n spatialTypes: ColumnType[] = [\n \"geometry\",\n \"point\",\n \"linestring\",\n \"polygon\",\n \"multipoint\",\n \"multilinestring\",\n \"multipolygon\",\n \"geometrycollection\"\n ];\n\n /**\n * Gets list of column data types that support length by a driver.\n */\n withLengthColumnTypes: ColumnType[] = [\n \"char\",\n \"varchar\",\n \"nvarchar\",\n \"binary\",\n \"varbinary\"\n ];\n\n /**\n * Gets list of column data types that support length by a driver.\n */\n withWidthColumnTypes: ColumnType[] = [\n \"bit\",\n \"tinyint\",\n \"smallint\",\n \"mediumint\",\n \"int\",\n \"integer\",\n \"bigint\"\n ];\n\n /**\n * Gets list of column data types that support precision by a driver.\n */\n withPrecisionColumnTypes: ColumnType[] = [\n \"decimal\",\n \"dec\",\n \"numeric\",\n \"fixed\",\n \"float\",\n \"double\",\n \"double precision\",\n \"real\",\n \"time\",\n \"datetime\",\n \"timestamp\"\n ];\n\n /**\n * Gets list of column data types that supports scale by a driver.\n */\n withScaleColumnTypes: ColumnType[] = [\n \"decimal\",\n \"dec\",\n \"numeric\",\n \"fixed\",\n \"float\",\n \"double\",\n \"double precision\",\n \"real\"\n ];\n\n /**\n * Gets list of column data types that supports UNSIGNED and ZEROFILL attributes.\n */\n unsignedAndZerofillTypes: ColumnType[] = [\n \"int\",\n \"integer\",\n \"smallint\",\n \"tinyint\",\n \"mediumint\",\n \"bigint\",\n \"decimal\",\n \"dec\",\n \"numeric\",\n \"fixed\",\n \"float\",\n \"double\",\n \"double precision\",\n \"real\"\n ];\n\n /**\n * ORM has special columns and we need to know what database column types should be for those columns.\n * Column types are driver dependant.\n */\n mappedDataTypes: MappedColumnTypes = {\n createDate: \"datetime\",\n createDatePrecision: 6,\n createDateDefault: \"CURRENT_TIMESTAMP(6)\",\n updateDate: \"datetime\",\n updateDatePrecision: 6,\n updateDateDefault: \"CURRENT_TIMESTAMP(6)\",\n version: \"int\",\n treeLevel: \"int\",\n migrationId: \"int\",\n migrationName: \"varchar\",\n migrationTimestamp: \"bigint\",\n cacheId: \"int\",\n cacheIdentifier: \"varchar\",\n cacheTime: \"bigint\",\n cacheDuration: \"int\",\n cacheQuery: \"text\",\n cacheResult: \"text\",\n metadataType: \"varchar\",\n metadataDatabase: \"varchar\",\n metadataSchema: \"varchar\",\n metadataTable: \"varchar\",\n metadataName: \"varchar\",\n metadataValue: \"text\",\n };\n\n /**\n * Default values of length, precision and scale depends on column data type.\n * Used in the cases when length/precision/scale is not specified by user.\n */\n dataTypeDefaults: DataTypeDefaults = {\n \"varchar\": { length: 255 },\n \"nvarchar\": { length: 255 },\n \"national varchar\": { length: 255 },\n \"char\": { length: 1 },\n \"binary\": { length: 1 },\n \"varbinary\": { length: 255 },\n \"decimal\": { precision: 10, scale: 0 },\n \"dec\": { precision: 10, scale: 0 },\n \"numeric\": { precision: 10, scale: 0 },\n \"fixed\": { precision: 10, scale: 0 },\n \"float\": { precision: 12 },\n \"double\": { precision: 22 },\n \"time\": { precision: 0 },\n \"datetime\": { precision: 0 },\n \"timestamp\": { precision: 0 },\n \"bit\": { width: 1 },\n \"int\": { width: 11 },\n \"integer\": { width: 11 },\n \"tinyint\": { width: 4 },\n \"smallint\": { width: 6 },\n \"mediumint\": { width: 9 },\n \"bigint\": { width: 20 }\n };\n\n\n /**\n * Max length allowed by MySQL for aliases.\n * @see https://dev.mysql.com/doc/refman/5.5/en/identifiers.html\n */\n maxAliasLength = 63;\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(connection: Connection) {\n this.connection = connection;\n this.options = connection.options as MysqlConnectionOptions;\n this.isReplicated = this.options.replication ? true : false;\n\n // load mysql package\n this.loadDependencies();\n\n this.database = this.options.replication ? this.options.replication.master.database : this.options.database;\n\n // validate options to make sure everything is set\n // todo: revisit validation with replication in mind\n // if (!(this.options.host || (this.options.extra && this.options.extra.socketPath)) && !this.options.socketPath)\n // throw new DriverOptionNotSetError(\"socketPath and host\");\n // if (!this.options.username)\n // throw new DriverOptionNotSetError(\"username\");\n // if (!this.options.database)\n // throw new DriverOptionNotSetError(\"database\");\n // todo: check what is going on when connection is setup without database and how to connect to a database then?\n // todo: provide options to auto-create a database if it does not exist yet\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Performs connection to the database.\n */\n async connect(): Promise<void> {\n\n if (this.options.replication) {\n this.poolCluster = this.mysql.createPoolCluster(this.options.replication);\n this.options.replication.slaves.forEach((slave, index) => {\n this.poolCluster.add(\"SLAVE\" + index, this.createConnectionOptions(this.options, slave));\n });\n this.poolCluster.add(\"MASTER\", this.createConnectionOptions(this.options, this.options.replication.master));\n\n } else {\n this.pool = await this.createPool(this.createConnectionOptions(this.options, this.options));\n }\n }\n\n /**\n * Makes any action after connection (e.g. create extensions in Postgres driver).\n */\n afterConnect(): Promise<void> {\n return Promise.resolve();\n }\n\n /**\n * Closes connection with the database.\n */\n async disconnect(): Promise<void> {\n if (!this.poolCluster && !this.pool)\n return Promise.reject(new ConnectionIsNotSetError(\"mysql\"));\n\n if (this.poolCluster) {\n return new Promise<void>((ok, fail) => {\n this.poolCluster.end((err: any) => err ? fail(err) : ok());\n this.poolCluster = undefined;\n });\n }\n if (this.pool) {\n return new Promise<void>((ok, fail) => {\n this.pool.end((err: any) => {\n if (err) return fail(err);\n this.pool = undefined;\n ok();\n });\n });\n }\n }\n\n /**\n * Creates a schema builder used to build and sync a schema.\n */\n createSchemaBuilder() {\n return new RdbmsSchemaBuilder(this.connection);\n }\n\n /**\n * Creates a query runner used to execute database queries.\n */\n createQueryRunner(mode: \"master\"|\"slave\" = \"master\") {\n return new MysqlQueryRunner(this, mode);\n }\n\n /**\n * Replaces parameters in the given sql with special escaping character\n * and an array of parameter names to be passed to a query.\n */\n escapeQueryWithParameters(sql: string, parameters: ObjectLiteral, nativeParameters: ObjectLiteral): [string, any[]] {\n const escapedParameters: any[] = Object.keys(nativeParameters).map(key => nativeParameters[key]);\n if (!parameters || !Object.keys(parameters).length)\n return [sql, escapedParameters];\n\n const keys = Object.keys(parameters).map(parameter => \"(:(\\\\.\\\\.\\\\.)?\" + parameter + \"\\\\b)\").join(\"|\");\n sql = sql.replace(new RegExp(keys, \"g\"), (key: string) => {\n let value: any;\n if (key.substr(0, 4) === \":...\") {\n value = parameters[key.substr(4)];\n } else {\n value = parameters[key.substr(1)];\n }\n\n if (value instanceof Function) {\n return value();\n\n } else {\n escapedParameters.push(value);\n return \"?\";\n }\n }); // todo: make replace only in value statements, otherwise problems\n return [sql, escapedParameters];\n }\n\n /**\n * Escapes a column name.\n */\n escape(columnName: string): string {\n return \"`\" + columnName + \"`\";\n }\n\n /**\n * Build full table name with database name, schema name and table name.\n * E.g. \"myDB\".\"mySchema\".\"myTable\"\n */\n buildTableName(tableName: string, schema?: string, database?: string): string {\n return database ? `${database}.${tableName}` : tableName;\n }\n\n /**\n * Prepares given value to a value to be persisted, based on its column type and metadata.\n */\n preparePersistentValue(value: any, columnMetadata: ColumnMetadata): any {\n if (columnMetadata.transformer)\n value = ApplyValueTransformers.transformTo(columnMetadata.transformer, value);\n\n if (value === null || value === undefined)\n return value;\n\n if (columnMetadata.type === Boolean) {\n return value === true ? 1 : 0;\n\n } else if (columnMetadata.type === \"date\") {\n return DateUtils.mixedDateToDateString(value);\n\n } else if (columnMetadata.type === \"time\") {\n return DateUtils.mixedDateToTimeString(value);\n\n } else if (columnMetadata.type === \"json\") {\n return JSON.stringify(value);\n\n } else if (columnMetadata.type === \"timestamp\" || columnMetadata.type === \"datetime\" || columnMetadata.type === Date) {\n return DateUtils.mixedDateToDate(value);\n\n } else if (columnMetadata.type === \"simple-array\") {\n return DateUtils.simpleArrayToString(value);\n\n } else if (columnMetadata.type === \"simple-json\") {\n return DateUtils.simpleJsonToString(value);\n\n } else if (columnMetadata.type === \"enum\" || columnMetadata.type === \"simple-enum\") {\n return \"\" + value;\n }\n\n return value;\n }\n\n /**\n * Prepares given value to a value to be persisted, based on its column type or metadata.\n */\n prepareHydratedValue(value: any, columnMetadata: ColumnMetadata): any {\n if (value === null || value === undefined)\n return columnMetadata.transformer ? ApplyValueTransformers.transformFrom(columnMetadata.transformer, value) : value;\n\n if (columnMetadata.type === Boolean || columnMetadata.type === \"bool\" || columnMetadata.type === \"boolean\") {\n value = value ? true : false;\n\n } else if (columnMetadata.type === \"datetime\" || columnMetadata.type === Date) {\n value = DateUtils.normalizeHydratedDate(value);\n\n } else if (columnMetadata.type === \"date\") {\n value = DateUtils.mixedDateToDateString(value);\n\n } else if (columnMetadata.type === \"json\") {\n value = typeof value === \"string\" ? JSON.parse(value) : value;\n\n } else if (columnMetadata.type === \"time\") {\n value = DateUtils.mixedTimeToString(value);\n\n } else if (columnMetadata.type === \"simple-array\") {\n value = DateUtils.stringToSimpleArray(value);\n\n } else if (columnMetadata.type === \"simple-json\") {\n value = DateUtils.stringToSimpleJson(value);\n\n } else if ((columnMetadata.type === \"enum\" || columnMetadata.type === \"simple-enum\")\n && columnMetadata.enum\n && !isNaN(value)\n && columnMetadata.enum.indexOf(parseInt(value)) >= 0) {\n // convert to number if that exists in possible enum options\n value = parseInt(value);\n }\n\n if (columnMetadata.transformer)\n value = ApplyValueTransformers.transformFrom(columnMetadata.transformer, value);\n\n return value;\n }\n\n /**\n * Creates a database type from a given column metadata.\n */\n normalizeType(column: { type: ColumnType, length?: number|string, precision?: number|null, scale?: number }): string {\n if (column.type === Number || column.type === \"integer\") {\n return \"int\";\n\n } else if (column.type === String) {\n return \"varchar\";\n\n } else if (column.type === Date) {\n return \"datetime\";\n\n } else if ((column.type as any) === Buffer) {\n return \"blob\";\n\n } else if (column.type === Boolean) {\n return \"tinyint\";\n\n } else if (column.type === \"uuid\") {\n return \"varchar\";\n\n } else if (column.type === \"simple-array\" || column.type === \"simple-json\") {\n return \"text\";\n\n } else if (column.type === \"simple-enum\") {\n return \"enum\";\n\n } else if (column.type === \"double precision\" || column.type === \"real\") {\n return \"double\";\n\n } else if (column.type === \"dec\" || column.type === \"numeric\" || column.type === \"fixed\") {\n return \"decimal\";\n\n } else if (column.type === \"bool\" || column.type === \"boolean\") {\n return \"tinyint\";\n\n } else if (column.type === \"nvarchar\" || column.type === \"national varchar\") {\n return \"varchar\";\n\n } else if (column.type === \"nchar\" || column.type === \"national char\") {\n return \"char\";\n\n } else {\n return column.type as string || \"\";\n }\n }\n\n /**\n * Normalizes \"default\" value of the column.\n */\n normalizeDefault(columnMetadata: ColumnMetadata): string {\n const defaultValue = columnMetadata.default;\n\n if ((columnMetadata.type === \"enum\" || columnMetadata.type === \"simple-enum\") && defaultValue !== undefined) {\n return `'${defaultValue}'`;\n }\n\n if (typeof defaultValue === \"number\") {\n return \"\" + defaultValue;\n\n } else if (typeof defaultValue === \"boolean\") {\n return defaultValue === true ? \"1\" : \"0\";\n\n } else if (typeof defaultValue === \"function\") {\n return defaultValue();\n\n } else if (typeof defaultValue === \"string\") {\n return `'${defaultValue}'`;\n\n } else if (defaultValue === null) {\n return `null`;\n\n } else {\n return defaultValue;\n }\n }\n\n /**\n * Normalizes \"isUnique\" value of the column.\n */\n normalizeIsUnique(column: ColumnMetadata): boolean {\n return column.entityMetadata.indices.some(idx => idx.isUnique && idx.columns.length === 1 && idx.columns[0] === column);\n }\n\n /**\n * Returns default column lengths, which is required on column creation.\n */\n getColumnLength(column: ColumnMetadata|TableColumn): string {\n if (column.length)\n return column.length.toString();\n\n /**\n * fix https://github.com/typeorm/typeorm/issues/1139\n */\n if (column.generationStrategy === \"uuid\")\n return \"36\";\n\n switch (column.type) {\n case String:\n case \"varchar\":\n case \"nvarchar\":\n case \"national varchar\":\n return \"255\";\n case \"varbinary\":\n return \"255\";\n default:\n return \"\";\n }\n }\n\n /**\n * Creates column type definition including length, precision and scale\n */\n createFullType(column: TableColumn): string {\n let type = column.type;\n\n // used 'getColumnLength()' method, because MySQL requires column length for `varchar`, `nvarchar` and `varbinary` data types\n if (this.getColumnLength(column)) {\n type += `(${this.getColumnLength(column)})`;\n\n } else if (column.width) {\n type += `(${column.width})`;\n\n } else if (column.precision !== null && column.precision !== undefined && column.scale !== null && column.scale !== undefined) {\n type += `(${column.precision},${column.scale})`;\n\n } else if (column.precision !== null && column.precision !== undefined) {\n type += `(${column.precision})`;\n }\n\n if (column.isArray)\n type += \" array\";\n\n return type;\n }\n\n /**\n * Obtains a new database connection to a master server.\n * Used for replication.\n * If replication is not setup then returns default connection's database connection.\n */\n obtainMasterConnection(): Promise<any> {\n return new Promise<any>((ok, fail) => {\n if (this.poolCluster) {\n this.poolCluster.getConnection(\"MASTER\", (err: any, dbConnection: any) => {\n err ? fail(err) : ok(this.prepareDbConnection(dbConnection));\n });\n\n } else if (this.pool) {\n this.pool.getConnection((err: any, dbConnection: any) => {\n err ? fail(err) : ok(this.prepareDbConnection(dbConnection));\n });\n } else {\n fail(new Error(`Connection is not established with mysql database`));\n }\n });\n }\n\n /**\n * Obtains a new database connection to a slave server.\n * Used for replication.\n * If replication is not setup then returns master (default) connection's database connection.\n */\n obtainSlaveConnection(): Promise<any> {\n if (!this.poolCluster)\n return this.obtainMasterConnection();\n\n return new Promise<any>((ok, fail) => {\n this.poolCluster.getConnection(\"SLAVE*\", (err: any, dbConnection: any) => {\n err ? fail(err) : ok(dbConnection);\n });\n });\n }\n\n /**\n * Creates generated map of values generated or returned by database after INSERT query.\n */\n createGeneratedMap(metadata: EntityMetadata, insertResult: any) {\n const generatedMap = metadata.generatedColumns.reduce((map, generatedColumn) => {\n let value: any;\n if (generatedColumn.generationStrategy === \"increment\" && insertResult.insertId) {\n value = insertResult.insertId;\n // } else if (generatedColumn.generationStrategy === \"uuid\") {\n // console.log(\"getting db value:\", generatedColumn.databaseName);\n // value = generatedColumn.getEntityValue(uuidMap);\n }\n\n return OrmUtils.mergeDeep(map, generatedColumn.createValueMap(value));\n }, {} as ObjectLiteral);\n\n return Object.keys(generatedMap).length > 0 ? generatedMap : undefined;\n }\n\n /**\n * Differentiate columns of this table and columns from the given column metadatas columns\n * and returns only changed.\n */\n findChangedColumns(tableColumns: TableColumn[], columnMetadatas: ColumnMetadata[]): ColumnMetadata[] {\n return columnMetadatas.filter(columnMetadata => {\n const tableColumn = tableColumns.find(c => c.name === columnMetadata.databaseName);\n if (!tableColumn)\n return false; // we don't need new columns, we only need exist and changed\n\n // console.log(\"table:\", columnMetadata.entityMetadata.tableName);\n // console.log(\"name:\", tableColumn.name, columnMetadata.databaseName);\n // console.log(\"type:\", tableColumn.type, this.normalizeType(columnMetadata));\n // console.log(\"length:\", tableColumn.length, columnMetadata.length);\n // console.log(\"width:\", tableColumn.width, columnMetadata.width);\n // console.log(\"precision:\", tableColumn.precision, columnMetadata.precision);\n // console.log(\"scale:\", tableColumn.scale, columnMetadata.scale);\n // console.log(\"zerofill:\", tableColumn.zerofill, columnMetadata.zerofill);\n // console.log(\"unsigned:\", tableColumn.unsigned, columnMetadata.unsigned);\n // console.log(\"asExpression:\", tableColumn.asExpression, columnMetadata.asExpression);\n // console.log(\"generatedType:\", tableColumn.generatedType, columnMetadata.generatedType);\n // console.log(\"comment:\", tableColumn.comment, columnMetadata.comment);\n // console.log(\"default:\", tableColumn.default, columnMetadata.default);\n // console.log(\"enum:\", tableColumn.enum, columnMetadata.enum);\n // console.log(\"default changed:\", !this.compareDefaultValues(this.normalizeDefault(columnMetadata), tableColumn.default));\n // console.log(\"onUpdate:\", tableColumn.onUpdate, columnMetadata.onUpdate);\n // console.log(\"isPrimary:\", tableColumn.isPrimary, columnMetadata.isPrimary);\n // console.log(\"isNullable:\", tableColumn.isNullable, columnMetadata.isNullable);\n // console.log(\"isUnique:\", tableColumn.isUnique, this.normalizeIsUnique(columnMetadata));\n // console.log(\"isGenerated:\", tableColumn.isGenerated, columnMetadata.isGenerated);\n // console.log((columnMetadata.generationStrategy !== \"uuid\" && tableColumn.isGenerated !== columnMetadata.isGenerated));\n // console.log(\"==========================================\");\n\n let columnMetadataLength = columnMetadata.length;\n if (!columnMetadataLength && columnMetadata.generationStrategy === \"uuid\") { // fixing #3374\n columnMetadataLength = this.getColumnLength(columnMetadata);\n }\n\n return tableColumn.name !== columnMetadata.databaseName\n || tableColumn.type !== this.normalizeType(columnMetadata)\n || tableColumn.length !== columnMetadataLength\n || tableColumn.width !== columnMetadata.width\n || tableColumn.precision !== columnMetadata.precision\n || tableColumn.scale !== columnMetadata.scale\n || tableColumn.zerofill !== columnMetadata.zerofill\n || tableColumn.unsigned !== columnMetadata.unsigned\n || tableColumn.asExpression !== columnMetadata.asExpression\n || tableColumn.generatedType !== columnMetadata.generatedType\n // || tableColumn.comment !== columnMetadata.comment // todo\n || !this.compareDefaultValues(this.normalizeDefault(columnMetadata), tableColumn.default)\n || (tableColumn.enum && columnMetadata.enum && !OrmUtils.isArraysEqual(tableColumn.enum, columnMetadata.enum.map(val => val + \"\")))\n || tableColumn.onUpdate !== columnMetadata.onUpdate\n || tableColumn.isPrimary !== columnMetadata.isPrimary\n || tableColumn.isNullable !== columnMetadata.isNullable\n || tableColumn.isUnique !== this.normalizeIsUnique(columnMetadata)\n || (columnMetadata.generationStrategy !== \"uuid\" && tableColumn.isGenerated !== columnMetadata.isGenerated);\n });\n }\n\n /**\n * Returns true if driver supports RETURNING / OUTPUT statement.\n */\n isReturningSqlSupported(): boolean {\n return false;\n }\n\n /**\n * Returns true if driver supports uuid values generation on its own.\n */\n isUUIDGenerationSupported(): boolean {\n return false;\n }\n\n /**\n * Creates an escaped parameter.\n */\n createParameter(parameterName: string, index: number): string {\n return \"?\";\n }\n\n // -------------------------------------------------------------------------\n // Protected Methods\n // -------------------------------------------------------------------------\n\n /**\n * Loads all driver dependencies.\n */\n protected loadDependencies(): void {\n try {\n this.mysql = PlatformTools.load(\"mysql\"); // try to load first supported package\n /*\n * Some frameworks (such as Jest) may mess up Node's require cache and provide garbage for the 'mysql' module\n * if it was not installed. We check that the object we got actually contains something otherwise we treat\n * it as if the `require` call failed.\n *\n * @see https://github.com/typeorm/typeorm/issues/1373\n */\n if (Object.keys(this.mysql).length === 0) {\n throw new Error(\"'mysql' was found but it is empty. Falling back to 'mysql2'.\");\n }\n } catch (e) {\n try {\n this.mysql = PlatformTools.load(\"mysql2\"); // try to load second supported package\n\n } catch (e) {\n throw new DriverPackageNotInstalledError(\"Mysql\", \"mysql\");\n }\n }\n }\n\n /**\n * Creates a new connection pool for a given database credentials.\n */\n protected createConnectionOptions(options: MysqlConnectionOptions, credentials: MysqlConnectionCredentialsOptions): Promise<any> {\n\n credentials = Object.assign(credentials, DriverUtils.buildDriverOptions(credentials)); // todo: do it better way\n\n // build connection options for the driver\n return Object.assign({}, {\n charset: options.charset,\n timezone: options.timezone,\n connectTimeout: options.connectTimeout,\n insecureAuth: options.insecureAuth,\n supportBigNumbers: options.supportBigNumbers !== undefined ? options.supportBigNumbers : true,\n bigNumberStrings: options.bigNumberStrings !== undefined ? options.bigNumberStrings : true,\n dateStrings: options.dateStrings,\n debug: options.debug,\n trace: options.trace,\n multipleStatements: options.multipleStatements,\n flags: options.flags\n }, {\n host: credentials.host,\n user: credentials.username,\n password: credentials.password,\n database: credentials.database,\n port: credentials.port,\n ssl: options.ssl\n },\n options.acquireTimeout === undefined\n ? {}\n : { acquireTimeout: options.acquireTimeout },\n options.extra || {});\n }\n\n /**\n * Creates a new connection pool for a given database credentials.\n */\n protected createPool(connectionOptions: any): Promise<any> {\n\n // create a connection pool\n const pool = this.mysql.createPool(connectionOptions);\n\n // make sure connection is working fine\n return new Promise<void>((ok, fail) => {\n // (issue #610) we make first connection to database to make sure if connection credentials are wrong\n // we give error before calling any other method that creates actual query runner\n pool.getConnection((err: any, connection: any) => {\n if (err)\n return pool.end(() => fail(err));\n\n connection.release();\n ok(pool);\n });\n });\n }\n\n /**\n * Attaches all required base handlers to a database connection, such as the unhandled error handler.\n */\n private prepareDbConnection(connection: any): any {\n const { logger } = this.connection;\n /*\n Attaching an error handler to connection errors is essential, as, otherwise, errors raised will go unhandled and\n cause the hosting app to crash.\n */\n if (connection.listeners(\"error\").length === 0) {\n connection.on(\"error\", (error: any) => logger.log(\"warn\", `MySQL connection raised an error. ${error}`));\n }\n return connection;\n }\n\n /**\n * Checks if \"DEFAULT\" values in the column metadata and in the database are equal.\n */\n protected compareDefaultValues(columnMetadataValue: string, databaseValue: string): boolean {\n if (typeof columnMetadataValue === \"string\" && typeof databaseValue === \"string\") {\n // we need to cut out \"'\" because in mysql we can understand returned value is a string or a function\n // as result compare cannot understand if default is really changed or not\n columnMetadataValue = columnMetadataValue.replace(/^'+|'+$/g, \"\");\n databaseValue = databaseValue.replace(/^'+|'+$/g, \"\");\n }\n\n return columnMetadataValue === databaseValue;\n }\n\n}\n"],"sourceRoot":"../.."}
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