278 lines
8 KiB
TypeScript
278 lines
8 KiB
TypeScript
import {
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DatasourceFieldTypes,
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Integration,
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Operation,
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QueryJson,
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QueryTypes,
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SqlQuery,
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} from "../definitions/datasource"
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import {
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getSqlQuery,
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buildExternalTableId,
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convertSqlType,
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finaliseExternalTables,
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SqlClients,
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} from "./utils"
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import { DatasourcePlus } from "./base/datasourcePlus"
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import { Table, TableSchema } from "../definitions/common"
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module MSSQLModule {
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const sqlServer = require("mssql")
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const Sql = require("./base/sql")
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interface MSSQLConfig {
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user: string
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password: string
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server: string
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port: number
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database: string
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encrypt?: boolean
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}
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const SCHEMA: Integration = {
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docs: "https://github.com/tediousjs/node-mssql",
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plus: true,
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description:
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"Microsoft SQL Server is a relational database management system developed by Microsoft. ",
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friendlyName: "MS SQL Server",
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datasource: {
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user: {
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type: DatasourceFieldTypes.STRING,
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required: true,
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default: "localhost",
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},
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password: {
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type: DatasourceFieldTypes.PASSWORD,
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required: true,
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},
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server: {
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type: DatasourceFieldTypes.STRING,
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default: "localhost",
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},
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port: {
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type: DatasourceFieldTypes.NUMBER,
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required: false,
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default: 1433,
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},
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database: {
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type: DatasourceFieldTypes.STRING,
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default: "root",
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},
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encrypt: {
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type: DatasourceFieldTypes.BOOLEAN,
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default: true,
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},
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},
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query: {
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create: {
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type: QueryTypes.SQL,
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},
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read: {
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type: QueryTypes.SQL,
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},
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update: {
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type: QueryTypes.SQL,
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},
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delete: {
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type: QueryTypes.SQL,
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},
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},
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}
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async function internalQuery(
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client: any,
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query: SqlQuery,
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operation: string | undefined = undefined
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) {
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const request = client.request()
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try {
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if (Array.isArray(query.bindings)) {
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let count = 0
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for (let binding of query.bindings) {
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request.input(`p${count++}`, binding)
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}
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}
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// this is a hack to get the inserted ID back,
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// no way to do this with Knex nicely
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const sql =
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operation === Operation.CREATE
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? `${query.sql}; SELECT SCOPE_IDENTITY() AS id;`
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: query.sql
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return await request.query(sql)
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} catch (err) {
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// @ts-ignore
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throw new Error(err)
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}
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}
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class SqlServerIntegration extends Sql implements DatasourcePlus {
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private readonly config: MSSQLConfig
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static pool: any
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public tables: Record<string, Table> = {}
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public schemaErrors: Record<string, string> = {}
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MASTER_TABLES = [
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"spt_fallback_db",
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"spt_fallback_dev",
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"spt_fallback_usg",
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"spt_monitor",
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"MSreplication_options",
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]
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TABLES_SQL =
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"SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'"
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getDefinitionSQL(tableName: string) {
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return `select *
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from INFORMATION_SCHEMA.COLUMNS
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where TABLE_NAME='${tableName}'`
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}
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getConstraintsSQL(tableName: string) {
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return `SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS TC
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INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS KU
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ON TC.CONSTRAINT_TYPE = 'PRIMARY KEY'
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AND TC.CONSTRAINT_NAME = KU.CONSTRAINT_NAME
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AND KU.table_name='${tableName}'
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ORDER BY
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KU.TABLE_NAME,
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KU.ORDINAL_POSITION;`
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}
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getAutoColumnsSQL(tableName: string) {
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return `SELECT
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COLUMNPROPERTY(OBJECT_ID(TABLE_SCHEMA+'.'+TABLE_NAME),COLUMN_NAME,'IsComputed')
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AS IS_COMPUTED,
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COLUMNPROPERTY(object_id(TABLE_SCHEMA+'.'+TABLE_NAME), COLUMN_NAME, 'IsIdentity')
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AS IS_IDENTITY,
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*
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_NAME='${tableName}'`
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}
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constructor(config: MSSQLConfig) {
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super(SqlClients.MS_SQL)
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this.config = config
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const clientCfg = {
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...this.config,
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options: {
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encrypt: this.config.encrypt,
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enableArithAbort: true,
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},
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}
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delete clientCfg.encrypt
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if (!this.pool) {
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this.pool = new sqlServer.ConnectionPool(clientCfg)
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}
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}
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async connect() {
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try {
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this.client = await this.pool.connect()
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} catch (err) {
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// @ts-ignore
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throw new Error(err)
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}
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}
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async runSQL(sql: string) {
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return (await internalQuery(this.client, getSqlQuery(sql))).recordset
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}
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/**
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* Fetches the tables from the sql server database and assigns them to the datasource.
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* @param {*} datasourceId - datasourceId to fetch
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* @param entities - the tables that are to be built
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*/
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async buildSchema(datasourceId: string, entities: Record<string, Table>) {
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await this.connect()
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let tableNames = await this.runSQL(this.TABLES_SQL)
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if (tableNames == null || !Array.isArray(tableNames)) {
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throw "Unable to get list of tables in database"
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}
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tableNames = tableNames
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.map((record: any) => record.TABLE_NAME)
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.filter((name: string) => this.MASTER_TABLES.indexOf(name) === -1)
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const tables: Record<string, Table> = {}
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for (let tableName of tableNames) {
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// get the column definition (type)
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const definition = await this.runSQL(this.getDefinitionSQL(tableName))
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// find primary key constraints
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const constraints = await this.runSQL(this.getConstraintsSQL(tableName))
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// find the computed and identity columns (auto columns)
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const columns = await this.runSQL(this.getAutoColumnsSQL(tableName))
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const primaryKeys = constraints
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.filter(
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(constraint: any) => constraint.CONSTRAINT_TYPE === "PRIMARY KEY"
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)
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.map((constraint: any) => constraint.COLUMN_NAME)
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const autoColumns = columns
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.filter((col: any) => col.IS_COMPUTED || col.IS_IDENTITY)
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.map((col: any) => col.COLUMN_NAME)
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let schema: TableSchema = {}
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for (let def of definition) {
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const name = def.COLUMN_NAME
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if (typeof name !== "string") {
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continue
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}
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const type: string = convertSqlType(def.DATA_TYPE)
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schema[name] = {
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autocolumn: !!autoColumns.find((col: string) => col === name),
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name: name,
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type,
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}
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}
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tables[tableName] = {
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_id: buildExternalTableId(datasourceId, tableName),
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primary: primaryKeys,
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name: tableName,
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schema,
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}
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}
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const final = finaliseExternalTables(tables, entities)
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this.tables = final.tables
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this.schemaErrors = final.errors
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}
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async read(query: SqlQuery | string) {
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await this.connect()
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const response = await internalQuery(this.client, getSqlQuery(query))
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return response.recordset
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}
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async create(query: SqlQuery | string) {
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await this.connect()
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const response = await internalQuery(this.client, getSqlQuery(query))
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return response.recordset || [{ created: true }]
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}
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async update(query: SqlQuery | string) {
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await this.connect()
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const response = await internalQuery(this.client, getSqlQuery(query))
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return response.recordset || [{ updated: true }]
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}
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async delete(query: SqlQuery | string) {
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await this.connect()
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const response = await internalQuery(this.client, getSqlQuery(query))
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return response.recordset || [{ deleted: true }]
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}
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async query(json: QueryJson) {
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await this.connect()
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const operation = this._operation(json)
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const queryFn = (query: any, op: string) =>
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internalQuery(this.client, query, op)
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const processFn = (result: any) =>
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result.recordset ? result.recordset : [{ [operation]: true }]
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return this.queryWithReturning(json, queryFn, processFn)
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}
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}
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module.exports = {
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schema: SCHEMA,
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integration: SqlServerIntegration,
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}
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}
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