feat(Postgres Node): Overhaul node

packages/nodes-base/nodes/Postgres/v2/actions/database/select.operation.ts

@@ -0,0 +1,134 @@
+import type { IExecuteFunctions } from 'n8n-core';
+import type { IDataObject, INodeExecutionData, INodeProperties } from 'n8n-workflow';
+
+import { updateDisplayOptions } from '../../../../../utils/utilities';
+
+import type {
+	PgpDatabase,
+	QueriesRunner,
+	QueryValues,
+	QueryWithValues,
+	SortRule,
+	WhereClause,
+} from '../../helpers/interfaces';
+
+import { addSortRules, addWhereClauses, replaceEmptyStringsByNulls } from '../../helpers/utils';
+
+import {
+	combineConditionsCollection,
+	optionsCollection,
+	sortFixedCollection,
+	whereFixedCollection,
+} from '../common.descriptions';
+
+const properties: INodeProperties[] = [
+	{
+		displayName: 'Return All',
+		name: 'returnAll',
+		type: 'boolean',
+		default: false,
+		description: 'Whether to return all results or only up to a given limit',
+		displayOptions: {
+			show: {
+				resource: ['event'],
+				operation: ['getAll'],
+			},
+		},
+	},
+	{
+		displayName: 'Limit',
+		name: 'limit',
+		type: 'number',
+		default: 50,
+		description: 'Max number of results to return',
+		typeOptions: {
+			minValue: 1,
+		},
+		displayOptions: {
+			show: {
+				returnAll: [false],
+			},
+		},
+	},
+	whereFixedCollection,
+	combineConditionsCollection,
+	sortFixedCollection,
+	optionsCollection,
+];
+
+const displayOptions = {
+	show: {
+		resource: ['database'],
+		operation: ['select'],
+	},
+	hide: {
+		table: [''],
+	},
+};
+
+export const description = updateDisplayOptions(displayOptions, properties);
+
+export async function execute(
+	this: IExecuteFunctions,
+	runQueries: QueriesRunner,
+	items: INodeExecutionData[],
+	nodeOptions: IDataObject,
+	_db?: PgpDatabase,
+): Promise<INodeExecutionData[]> {
+	items = replaceEmptyStringsByNulls(items, nodeOptions.replaceEmptyStrings as boolean);
+
+	const queries: QueryWithValues[] = [];
+
+	for (let i = 0; i < items.length; i++) {
+		const schema = this.getNodeParameter('schema', i, undefined, {
+			extractValue: true,
+		}) as string;
+
+		const table = this.getNodeParameter('table', i, undefined, {
+			extractValue: true,
+		}) as string;
+
+		let values: QueryValues = [schema, table];
+
+		const outputColumns = this.getNodeParameter('options.outputColumns', i, ['*']) as string[];
+
+		let query = '';
+
+		if (outputColumns.includes('*')) {
+			query = 'SELECT * FROM $1:name.$2:name';
+		} else {
+			values.push(outputColumns);
+			query = `SELECT $${values.length}:name FROM $1:name.$2:name`;
+		}
+
+		const whereClauses =
+			((this.getNodeParameter('where', i, []) as IDataObject).values as WhereClause[]) || [];
+
+		const combineConditions = this.getNodeParameter('combineConditions', i, 'AND') as string;
+
+		[query, values] = addWhereClauses(
+			this.getNode(),
+			i,
+			query,
+			whereClauses,
+			values,
+			combineConditions,
+		);
+
+		const sortRules =
+			((this.getNodeParameter('sort', i, []) as IDataObject).values as SortRule[]) || [];
+
+		[query, values] = addSortRules(query, sortRules, values);
+
+		const returnAll = this.getNodeParameter('returnAll', i, false);
+		if (!returnAll) {
+			const limit = this.getNodeParameter('limit', i, 50);
+			query += ` LIMIT ${limit}`;
+		}
+
+		const queryWithValues = { query, values };
+		queries.push(queryWithValues);
+	}
+
+	return runQueries(queries, items, nodeOptions);
+}