import { IExecuteFunctions } from 'n8n-core'; import { INodeExecutionData, INodeType, INodeTypeDescription, NodeOperationError, } from 'n8n-workflow'; import pgPromise from 'pg-promise'; import { pgInsert, pgQuery } from '../Postgres/Postgres.node.functions'; export class QuestDb implements INodeType { description: INodeTypeDescription = { displayName: 'QuestDB', name: 'questDb', // eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg icon: 'file:questdb.png', group: ['input'], version: 1, description: 'Get, add and update data in QuestDB', defaults: { name: 'QuestDB', }, inputs: ['main'], outputs: ['main'], credentials: [ { name: 'questDb', required: true, }, ], properties: [ { displayName: 'Operation', name: 'operation', type: 'options', noDataExpression: true, options: [ { name: 'Execute Query', value: 'executeQuery', description: 'Executes a SQL query', action: 'Execute a SQL query', }, { name: 'Insert', value: 'insert', description: 'Insert rows in database', action: 'Insert rows in database', }, ], default: 'insert', }, // ---------------------------------- // executeQuery // ---------------------------------- { displayName: 'Query', name: 'query', type: 'string', typeOptions: { alwaysOpenEditWindow: true, }, displayOptions: { show: { operation: ['executeQuery'], }, }, default: '', placeholder: 'SELECT id, name FROM product WHERE quantity > $1 AND price <= $2', required: true, description: 'The SQL query to execute. You can use n8n expressions or $1 and $2 in conjunction with query parameters.', }, // ---------------------------------- // insert // ---------------------------------- { displayName: 'Schema', name: 'schema', type: 'hidden', // Schema is used by pgInsert displayOptions: { show: { operation: ['insert'], }, }, default: '', description: 'Name of the schema the table belongs to', }, { displayName: 'Table', name: 'table', type: 'string', displayOptions: { show: { operation: ['insert'], }, }, default: '', required: true, description: 'Name of the table in which to insert data to', }, { displayName: 'Columns', name: 'columns', type: 'string', displayOptions: { show: { operation: ['insert'], }, }, default: '', placeholder: 'id,name,description', description: 'Comma-separated list of the properties which should used as columns for the new rows', }, { displayName: 'Return Fields', name: 'returnFields', type: 'string', displayOptions: { show: { operation: ['insert'], }, }, default: '*', description: 'Comma-separated list of the fields that the operation will return', }, // ---------------------------------- // additional fields // ---------------------------------- { displayName: 'Additional Fields', name: 'additionalFields', type: 'collection', placeholder: 'Add Field', default: {}, displayOptions: { show: { operation: ['executeQuery'], }, }, options: [ { displayName: 'Mode', name: 'mode', type: 'options', options: [ { name: 'Independently', value: 'independently', description: 'Execute each query independently', }, { name: 'Transaction', value: 'transaction', description: 'Executes all queries in a single transaction', }, ], default: 'independently', description: 'The way queries should be sent to database. Can be used in conjunction with Continue on Fail. See the docs for more examples.', }, { displayName: 'Query Parameters', name: 'queryParams', type: 'string', displayOptions: { show: { '/operation': ['executeQuery'], }, }, default: '', placeholder: 'quantity,price', description: 'Comma-separated list of properties which should be used as query parameters', }, ], }, { displayName: 'Additional Fields', name: 'additionalFields', type: 'hidden', default: {}, displayOptions: { show: { operation: ['insert'], }, }, }, ], }; async execute(this: IExecuteFunctions): Promise { const credentials = await this.getCredentials('questDb'); const pgp = pgPromise(); const config = { host: credentials.host as string, port: credentials.port as number, database: credentials.database as string, user: credentials.user as string, password: credentials.password as string, ssl: !['disable', undefined].includes(credentials.ssl as string | undefined), sslmode: (credentials.ssl as string) || 'disable', }; const db = pgp(config); let returnItems: INodeExecutionData[] = []; const items = this.getInputData(); const operation = this.getNodeParameter('operation', 0); if (operation === 'executeQuery') { // ---------------------------------- // executeQuery // ---------------------------------- const additionalFields = this.getNodeParameter('additionalFields', 0); const mode = (additionalFields.mode || 'independently') as string; const queryResult = await pgQuery( this.getNodeParameter, pgp, db, items, this.continueOnFail(), mode, ); returnItems = this.helpers.returnJsonArray(queryResult); } else if (operation === 'insert') { // ---------------------------------- // insert // ---------------------------------- // Transaction and multiple won't work properly with QuestDB. // So we send queries independently. await pgInsert(this.getNodeParameter, pgp, db, items, this.continueOnFail(), 'independently'); const returnFields = this.getNodeParameter('returnFields', 0) as string; const table = this.getNodeParameter('table', 0) as string; const insertData = await db.any('SELECT ${columns:name} from ${table:name}', { columns: returnFields .split(',') .map((value) => value.trim()) .filter((value) => !!value), table, }); returnItems = this.helpers.returnJsonArray(insertData); } else { pgp.end(); throw new NodeOperationError( this.getNode(), `The operation "${operation}" is not supported!`, ); } // Close the connection pgp.end(); return this.prepareOutputData(returnItems); } }