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{ Driver, ReturningType } from \"../Driver\"\nimport { DriverPackageNotInstalledError } from \"../../error/DriverPackageNotInstalledError\"\nimport { SpannerQueryRunner } from \"./SpannerQueryRunner\"\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 { SpannerConnectionOptions } from \"./SpannerConnectionOptions\"\nimport { MappedColumnTypes } from \"../types/MappedColumnTypes\"\nimport { ColumnType } from \"../types/ColumnTypes\"\nimport { DataTypeDefaults } from \"../types/DataTypeDefaults\"\nimport { TableColumn } from \"../../schema-builder/table/TableColumn\"\nimport { EntityMetadata } from \"../../metadata/EntityMetadata\"\nimport { OrmUtils } from \"../../util/OrmUtils\"\nimport { ApplyValueTransformers } from \"../../util/ApplyValueTransformers\"\nimport { ReplicationMode } from \"../types/ReplicationMode\"\nimport { Table } from \"../../schema-builder/table/Table\"\nimport { View } from \"../../schema-builder/view/View\"\nimport { TableForeignKey } from \"../../schema-builder/table/TableForeignKey\"\nimport { CteCapabilities } from \"../types/CteCapabilities\"\nimport { UpsertType } from \"../types/UpsertType\"\n\n/**\n * Organizes communication with Spanner DBMS.\n */\nexport class SpannerDriver implements Driver {\n // -------------------------------------------------------------------------\n // Public Properties\n // -------------------------------------------------------------------------\n\n /**\n * Connection used by driver.\n */\n connection: Connection\n\n /**\n * Cloud Spanner underlying library.\n */\n spanner: any\n\n /**\n * Cloud Spanner instance.\n */\n instance: any\n\n /**\n * Cloud Spanner database.\n */\n instanceDatabase: any\n\n /**\n * Database name.\n */\n database?: string\n\n // -------------------------------------------------------------------------\n // Public Implemented Properties\n // -------------------------------------------------------------------------\n\n /**\n * Connection options.\n */\n options: SpannerConnectionOptions\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 * Represent transaction support by this driver\n */\n transactionSupport = \"none\" as const\n\n /**\n * Gets list of supported column data types by a driver.\n *\n * @see https://cloud.google.com/spanner/docs/reference/standard-sql/data-types\n */\n supportedDataTypes: ColumnType[] = [\n \"bool\",\n \"int64\",\n \"float64\",\n \"numeric\",\n \"string\",\n \"json\",\n \"bytes\",\n \"date\",\n \"timestamp\",\n \"array\",\n ]\n\n /**\n * Returns type of upsert supported by driver if any\n */\n supportedUpsertTypes: UpsertType[] = []\n\n /**\n * Gets list of spatial column data types.\n */\n spatialTypes: ColumnType[] = []\n\n /**\n * Gets list of column data types that support length by a driver.\n */\n withLengthColumnTypes: ColumnType[] = [\"string\", \"bytes\"]\n\n /**\n * Gets list of column data types that support length by a driver.\n */\n withWidthColumnTypes: ColumnType[] = []\n\n /**\n * Gets list of column data types that support precision by a driver.\n */\n withPrecisionColumnTypes: ColumnType[] = []\n\n /**\n * Gets list of column data types that supports scale by a driver.\n */\n withScaleColumnTypes: ColumnType[] = []\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: \"timestamp\",\n createDateDefault: \"\",\n updateDate: \"timestamp\",\n updateDateDefault: \"\",\n deleteDate: \"timestamp\",\n deleteDateNullable: true,\n version: \"int64\",\n treeLevel: \"int64\",\n migrationId: \"int64\",\n migrationName: \"string\",\n migrationTimestamp: \"int64\",\n cacheId: \"string\",\n cacheIdentifier: \"string\",\n cacheTime: \"int64\",\n cacheDuration: \"int64\",\n cacheQuery: \"string\",\n cacheResult: \"string\",\n metadataType: \"string\",\n metadataDatabase: \"string\",\n metadataSchema: \"string\",\n metadataTable: \"string\",\n metadataName: \"string\",\n metadataValue: \"string\",\n }\n\n /**\n * The prefix used for the parameters\n */\n parametersPrefix: string = \"@param\"\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\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 cteCapabilities: CteCapabilities = {\n enabled: true,\n }\n\n /**\n * Supported returning types\n */\n private readonly _isReturningSqlSupported: Record =\n {\n delete: false,\n insert: false,\n update: false,\n }\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(connection: Connection) {\n this.connection = connection\n this.options = connection.options as SpannerConnectionOptions\n this.isReplicated = this.options.replication ? true : false\n\n // load mysql package\n this.loadDependencies()\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Performs connection to the database.\n */\n async connect(): Promise {\n this.instance = this.spanner.instance(this.options.instanceId)\n this.instanceDatabase = this.instance.database(this.options.databaseId)\n }\n\n /**\n * Makes any action after connection (e.g. create extensions in Postgres driver).\n */\n afterConnect(): Promise {\n return Promise.resolve()\n }\n\n /**\n * Closes connection with the database.\n */\n async disconnect(): Promise {\n this.instanceDatabase.close()\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: ReplicationMode) {\n return new SpannerQueryRunner(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(\n sql: string,\n parameters: ObjectLiteral,\n nativeParameters: ObjectLiteral,\n ): [string, any[]] {\n const escapedParameters: any[] = Object.keys(nativeParameters).map(\n (key) => nativeParameters[key],\n )\n if (!parameters || !Object.keys(parameters).length)\n return [sql, escapedParameters]\n\n const parameterIndexMap = new Map()\n sql = sql.replace(\n /:(\\.\\.\\.)?([A-Za-z0-9_.]+)/g,\n (full, isArray: string, key: string): string => {\n if (!parameters.hasOwnProperty(key)) {\n return full\n }\n\n if (parameterIndexMap.has(key)) {\n return this.parametersPrefix + parameterIndexMap.get(key)\n }\n\n let value: any = parameters[key]\n\n if (value === null) {\n return full\n }\n\n if (isArray) {\n return value\n .map((v: any) => {\n escapedParameters.push(v)\n return this.createParameter(\n key,\n escapedParameters.length - 1,\n )\n })\n .join(\", \")\n }\n\n if (value instanceof Function) {\n return value()\n }\n\n escapedParameters.push(value)\n parameterIndexMap.set(key, escapedParameters.length - 1)\n return this.createParameter(key, escapedParameters.length - 1)\n },\n ) // todo: make replace only in value statements, otherwise problems\n\n sql = sql.replace(\n /([ ]+)?=([ ]+)?:(\\.\\.\\.)?([A-Za-z0-9_.]+)/g,\n (\n full,\n emptySpaceBefore: string,\n emptySpaceAfter: string,\n isArray: string,\n key: string,\n ): string => {\n if (!parameters.hasOwnProperty(key)) {\n return full\n }\n\n let value: any = parameters[key]\n if (value === null) {\n return \" IS NULL\"\n }\n\n return full\n },\n )\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(\n tableName: string,\n schema?: string,\n database?: string,\n ): string {\n let tablePath = [tableName]\n\n if (database) {\n tablePath.unshift(database)\n }\n\n return tablePath.join(\".\")\n }\n\n /**\n * Parse a target table name or other types and return a normalized table definition.\n */\n parseTableName(\n target: EntityMetadata | Table | View | TableForeignKey | string,\n ): { database?: string; schema?: string; tableName: string } {\n const driverDatabase = this.database\n const driverSchema = undefined\n\n if (target instanceof Table || target instanceof View) {\n const parsed = this.parseTableName(target.name)\n\n return {\n database: target.database || parsed.database || driverDatabase,\n schema: target.schema || parsed.schema || driverSchema,\n tableName: parsed.tableName,\n }\n }\n\n if (target instanceof TableForeignKey) {\n const parsed = this.parseTableName(target.referencedTableName)\n\n return {\n database:\n target.referencedDatabase ||\n parsed.database ||\n driverDatabase,\n schema:\n target.referencedSchema || parsed.schema || driverSchema,\n tableName: parsed.tableName,\n }\n }\n\n if (target instanceof EntityMetadata) {\n // EntityMetadata tableName is never a path\n\n return {\n database: target.database || driverDatabase,\n schema: target.schema || driverSchema,\n tableName: target.tableName,\n }\n }\n\n const parts = target.split(\".\")\n\n return {\n database:\n (parts.length > 1 ? parts[0] : undefined) || driverDatabase,\n schema: driverSchema,\n tableName: parts.length > 1 ? parts[1] : parts[0],\n }\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(\n columnMetadata.transformer,\n value,\n )\n\n if (value === null || value === undefined) return value\n\n if (columnMetadata.type === \"numeric\") {\n const lib = this.options.driver || PlatformTools.load(\"spanner\")\n return lib.Spanner.numeric(value)\n } else if (columnMetadata.type === \"date\") {\n return DateUtils.mixedDateToDateString(value)\n } else if (columnMetadata.type === \"json\") {\n return value\n } else if (\n columnMetadata.type === \"timestamp\" ||\n columnMetadata.type === Date\n ) {\n return DateUtils.mixedDateToDate(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\n ? ApplyValueTransformers.transformFrom(\n columnMetadata.transformer,\n value,\n )\n : value\n\n if (columnMetadata.type === Boolean || columnMetadata.type === \"bool\") {\n value = value ? true : false\n } else if (\n columnMetadata.type === \"timestamp\" ||\n columnMetadata.type === Date\n ) {\n value = new Date(value)\n } else if (columnMetadata.type === \"numeric\") {\n value = value.value\n } else if (columnMetadata.type === \"date\") {\n value = DateUtils.mixedDateToDateString(value)\n } else if (columnMetadata.type === \"json\") {\n value = typeof value === \"string\" ? JSON.parse(value) : value\n } else if (columnMetadata.type === Number) {\n // convert to number if number\n value = !isNaN(+value) ? parseInt(value) : value\n }\n\n if (columnMetadata.transformer)\n value = ApplyValueTransformers.transformFrom(\n columnMetadata.transformer,\n value,\n )\n\n return value\n }\n\n /**\n * Creates a database type from a given column metadata.\n */\n normalizeType(column: {\n type: ColumnType\n length?: number | string\n precision?: number | null\n scale?: number\n }): string {\n if (column.type === Number) {\n return \"int64\"\n } else if (column.type === String || column.type === \"uuid\") {\n return \"string\"\n } else if (column.type === Date) {\n return \"timestamp\"\n } else if ((column.type as any) === Buffer) {\n return \"bytes\"\n } else if (column.type === Boolean) {\n return \"bool\"\n } else {\n return (column.type as string) || \"\"\n }\n }\n\n /**\n * Normalizes \"default\" value of the column.\n *\n * Spanner does not support default values.\n */\n normalizeDefault(columnMetadata: ColumnMetadata): string | undefined {\n return columnMetadata.default === \"\"\n ? `\"${columnMetadata.default}\"`\n : `${columnMetadata.default}`\n }\n\n /**\n * Normalizes \"isUnique\" value of the column.\n */\n normalizeIsUnique(column: ColumnMetadata): boolean {\n return column.entityMetadata.indices.some(\n (idx) =>\n idx.isUnique &&\n idx.columns.length === 1 &&\n idx.columns[0] === column,\n )\n }\n\n /**\n * Returns default column lengths, which is required on column creation.\n */\n getColumnLength(column: ColumnMetadata | TableColumn): string {\n if (column.length) return column.length.toString()\n if (column.generationStrategy === \"uuid\") return \"36\"\n\n switch (column.type) {\n case String:\n case \"string\":\n case \"bytes\":\n return \"max\"\n default:\n return \"\"\n }\n }\n\n /**\n * Creates column type definition including length, precision and scale\n */\n createFullType(column: TableColumn): string {\n let type = column.type\n\n // used 'getColumnLength()' method, because Spanner requires column length for `string` and `bytes` data types\n if (this.getColumnLength(column)) {\n type += `(${this.getColumnLength(column)})`\n } else if (column.width) {\n type += `(${column.width})`\n } else if (\n column.precision !== null &&\n column.precision !== undefined &&\n column.scale !== null &&\n column.scale !== undefined\n ) {\n type += `(${column.precision},${column.scale})`\n } else if (\n column.precision !== null &&\n column.precision !== undefined\n ) {\n type += `(${column.precision})`\n }\n\n if (column.isArray) type = `array<${type}>`\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 {\n return this.instanceDatabase\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 {\n return this.instanceDatabase\n }\n\n /**\n * Creates generated map of values generated or returned by database after INSERT query.\n */\n createGeneratedMap(\n metadata: EntityMetadata,\n insertResult: any,\n entityIndex: number,\n ) {\n if (!insertResult) {\n return undefined\n }\n\n if (insertResult.insertId === undefined) {\n return Object.keys(insertResult).reduce((map, key) => {\n const column = metadata.findColumnWithDatabaseName(key)\n if (column) {\n OrmUtils.mergeDeep(\n map,\n column.createValueMap(insertResult[key]),\n )\n // OrmUtils.mergeDeep(map, column.createValueMap(this.prepareHydratedValue(insertResult[key], column))); // TODO: probably should be like there, but fails on enums, fix later\n }\n return map\n }, {} as ObjectLiteral)\n }\n\n const generatedMap = metadata.generatedColumns.reduce(\n (map, generatedColumn) => {\n let value: any\n if (\n generatedColumn.generationStrategy === \"increment\" &&\n insertResult.insertId\n ) {\n // NOTE: When multiple rows is inserted by a single INSERT statement,\n // `insertId` is the value generated for the first inserted row only.\n value = insertResult.insertId + entityIndex\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(\n map,\n generatedColumn.createValueMap(value),\n )\n },\n {} as ObjectLiteral,\n )\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(\n tableColumns: TableColumn[],\n columnMetadatas: ColumnMetadata[],\n ): ColumnMetadata[] {\n return columnMetadatas.filter((columnMetadata) => {\n const tableColumn = tableColumns.find(\n (c) => c.name === columnMetadata.databaseName,\n )\n if (!tableColumn) return false // we don't need new columns, we only need exist and changed\n\n const isColumnChanged =\n tableColumn.name !== columnMetadata.databaseName ||\n tableColumn.type !== this.normalizeType(columnMetadata) ||\n tableColumn.length !== this.getColumnLength(columnMetadata) ||\n tableColumn.asExpression !== columnMetadata.asExpression ||\n tableColumn.generatedType !== columnMetadata.generatedType ||\n tableColumn.isPrimary !== columnMetadata.isPrimary ||\n !this.compareNullableValues(columnMetadata, tableColumn) ||\n tableColumn.isUnique !== this.normalizeIsUnique(columnMetadata)\n\n // DEBUG SECTION\n // if (isColumnChanged) {\n // console.log(\"table:\", columnMetadata.entityMetadata.tableName)\n // console.log(\n // \"name:\",\n // tableColumn.name,\n // columnMetadata.databaseName,\n // )\n // console.log(\n // \"type:\",\n // tableColumn.type,\n // this.normalizeType(columnMetadata),\n // )\n // console.log(\n // \"length:\",\n // tableColumn.length,\n // this.getColumnLength(columnMetadata),\n // )\n // console.log(\n // \"asExpression:\",\n // tableColumn.asExpression,\n // columnMetadata.asExpression,\n // )\n // console.log(\n // \"generatedType:\",\n // tableColumn.generatedType,\n // columnMetadata.generatedType,\n // )\n // console.log(\n // \"isPrimary:\",\n // tableColumn.isPrimary,\n // columnMetadata.isPrimary,\n // )\n // console.log(\n // \"isNullable:\",\n // tableColumn.isNullable,\n // columnMetadata.isNullable,\n // )\n // console.log(\n // \"isUnique:\",\n // tableColumn.isUnique,\n // this.normalizeIsUnique(columnMetadata),\n // )\n // console.log(\"==========================================\")\n // }\n\n return isColumnChanged\n })\n }\n\n /**\n * Returns true if driver supports RETURNING / OUTPUT statement.\n */\n isReturningSqlSupported(returningType: ReturningType): boolean {\n return this._isReturningSqlSupported[returningType]\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 * Returns true if driver supports fulltext indices.\n */\n isFullTextColumnTypeSupported(): boolean {\n return false\n }\n\n /**\n * Creates an escaped parameter.\n */\n createParameter(parameterName: string, index: number): string {\n return this.parametersPrefix + index\n }\n\n // -------------------------------------------------------------------------\n // Protected Methods\n // -------------------------------------------------------------------------\n\n /**\n * Loads all driver dependencies.\n */\n protected loadDependencies(): void {\n try {\n const lib = this.options.driver || PlatformTools.load(\"spanner\")\n this.spanner = new lib.Spanner({\n projectId: this.options.projectId,\n })\n } catch (e) {\n console.error(e)\n throw new DriverPackageNotInstalledError(\n \"Spanner\",\n \"@google-cloud/spanner\",\n )\n }\n }\n\n compareNullableValues(\n columnMetadata: ColumnMetadata,\n tableColumn: TableColumn,\n ): boolean {\n // Spanner does not support NULL/NOT NULL expressions for generated columns\n if (columnMetadata.generatedType) {\n return true\n }\n\n return columnMetadata.isNullable === tableColumn.isNullable\n }\n\n /**\n * Checks if \"DEFAULT\" values in the column metadata and in the database are equal.\n */\n protected compareDefaultValues(\n columnMetadataValue: string | undefined,\n databaseValue: string | undefined,\n ): boolean {\n if (\n typeof columnMetadataValue === \"string\" &&\n typeof databaseValue === \"string\"\n ) {\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(/^'+|'+$/g, \"\")\n }\n\n return columnMetadataValue === databaseValue\n }\n\n /**\n * If parameter is a datetime function, e.g. \"CURRENT_TIMESTAMP\", normalizes it.\n * Otherwise returns original input.\n */\n protected normalizeDatetimeFunction(value?: string) {\n if (!value) return value\n\n // check if input is datetime function\n const isDatetimeFunction =\n value.toUpperCase().indexOf(\"CURRENT_TIMESTAMP\") !== -1 ||\n value.toUpperCase().indexOf(\"NOW\") !== -1\n\n if (isDatetimeFunction) {\n // extract precision, e.g. \"(3)\"\n const precision = value.match(/\\(\\d+\\)/)\n return precision\n ? `CURRENT_TIMESTAMP${precision[0]}`\n : \"CURRENT_TIMESTAMP\"\n } else {\n return value\n }\n }\n\n /**\n * Escapes a given comment.\n */\n protected escapeComment(comment?: string) {\n if (!comment) return comment\n\n comment = comment.replace(/\\u0000/g, \"\") // Null bytes aren't allowed in comments\n\n return comment\n }\n}\n"],"sourceRoot":"../.."}