feat(MySQL Node): Overhaul

packages/nodes-base/nodes/MySql/v2/methods/loadOptions.ts

@@ -0,0 +1,64 @@
+import type { IDataObject, ILoadOptionsFunctions, INodePropertyOptions } from 'n8n-workflow';
+import { createPool } from '../transport';
+
+import { Client } from 'ssh2';
+
+export async function getColumns(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+	const credentials = await this.getCredentials('mySql');
+	const nodeOptions = this.getNodeParameter('options', 0) as IDataObject;
+
+	let sshClient: Client | undefined = undefined;
+
+	if (credentials.sshTunnel) {
+		sshClient = new Client();
+	}
+	const pool = await createPool(credentials, nodeOptions, sshClient);
+
+	try {
+		const connection = await pool.getConnection();
+
+		const table = this.getNodeParameter('table', 0, {
+			extractValue: true,
+		}) as string;
+
+		const columns = (
+			await connection.query(
+				`SHOW COLUMNS FROM \`${table}\` FROM \`${credentials.database as string}\``,
+			)
+		)[0] as IDataObject[];
+
+		connection.release();
+
+		return (columns || []).map((column: IDataObject) => ({
+			name: column.Field as string,
+			value: column.Field as string,
+			// eslint-disable-next-line n8n-nodes-base/node-param-description-lowercase-first-char
+			description: `type: ${(column.Type as string).toUpperCase()}, nullable: ${
+				column.Null as string
+			}`,
+		}));
+	} catch (error) {
+		throw error;
+	} finally {
+		if (sshClient) {
+			sshClient.end();
+		}
+		await pool.end();
+	}
+}
+
+export async function getColumnsMultiOptions(
+	this: ILoadOptionsFunctions,
+): Promise<INodePropertyOptions[]> {
+	const returnData = await getColumns.call(this);
+	const returnAll = { name: '*', value: '*', description: 'All columns' };
+	return [returnAll, ...returnData];
+}
+
+export async function getColumnsWithoutColumnToMatchOn(
+	this: ILoadOptionsFunctions,
+): Promise<INodePropertyOptions[]> {
+	const columnToMatchOn = this.getNodeParameter('columnToMatchOn') as string;
+	const returnData = await getColumns.call(this);
+	return returnData.filter((column) => column.value !== columnToMatchOn);
+}