feat(Postgres Node): Overhaul node

packages/nodes-base/nodes/Postgres/v2/methods/listSearch.ts

@@ -0,0 +1,47 @@
+import type { ILoadOptionsFunctions, INodeListSearchResult } from 'n8n-workflow';
+import type { ConnectionsData } from '../helpers/interfaces';
+import { Connections } from '../transport';
+
+export async function schemaSearch(this: ILoadOptionsFunctions): Promise<INodeListSearchResult> {
+	const credentials = await this.getCredentials('postgres');
+
+	const { db } = (await Connections.getInstance(credentials)) as ConnectionsData;
+
+	try {
+		const response = await db.any('SELECT schema_name FROM information_schema.schemata');
+
+		return {
+			results: response.map((schema) => ({
+				name: schema.schema_name as string,
+				value: schema.schema_name as string,
+			})),
+		};
+	} catch (error) {
+		throw error;
+	}
+}
+export async function tableSearch(this: ILoadOptionsFunctions): Promise<INodeListSearchResult> {
+	const credentials = await this.getCredentials('postgres');
+
+	const { db } = (await Connections.getInstance(credentials)) as ConnectionsData;
+
+	const schema = this.getNodeParameter('schema', 0, {
+		extractValue: true,
+	}) as string;
+
+	try {
+		const response = await db.any(
+			'SELECT table_name FROM information_schema.tables WHERE table_schema=$1',
+			[schema],
+		);
+
+		return {
+			results: response.map((table) => ({
+				name: table.table_name as string,
+				value: table.table_name as string,
+			})),
+		};
+	} catch (error) {
+		throw error;
+	}
+}