n8n/packages/nodes-base/nodes/Postgres/v2/actions/database/executeQuery.operation.ts

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import type { IExecuteFunctions } from 'n8n-core';
import type { IDataObject, INodeExecutionData, INodeProperties } from 'n8n-workflow';
import { NodeOperationError } from 'n8n-workflow';
import { updateDisplayOptions } from '../../../../../utils/utilities';
import type { PgpDatabase, QueriesRunner, QueryWithValues } from '../../helpers/interfaces';
import { replaceEmptyStringsByNulls } from '../../helpers/utils';
import { optionsCollection } from '../common.descriptions';
const properties: INodeProperties[] = [
{
displayName: 'Query',
name: 'query',
type: 'string',
default: '',
placeholder: 'e.g. SELECT id, name FROM product WHERE quantity > $1 AND price <= $2',
required: true,
description:
"The SQL query to execute. You can use n8n expressions and $1, $2, $3, etc to refer to the 'Query Parameters' set in options below.",
typeOptions: {
editor: 'sqlEditor',
sqlDialect: 'postgres',
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},
hint: 'Prefer using query parameters over n8n expressions to avoid SQL injection attacks',
},
{
displayName: `
To use query parameters in your SQL query, reference them as $1, $2, $3, etc in the corresponding order. <a href="https://docs.n8n.io/integrations/builtin/app-nodes/n8n-nodes-base.postgres/#use-query-parameters">More info</a>.
`,
name: 'notice',
type: 'notice',
default: '',
},
optionsCollection,
];
const displayOptions = {
show: {
resource: ['database'],
operation: ['executeQuery'],
},
};
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 query = this.getNodeParameter('query', i) as string;
let values: IDataObject[] = [];
let queryReplacement = this.getNodeParameter('options.queryReplacement', i, '');
if (typeof queryReplacement === 'string') {
queryReplacement = queryReplacement.split(',').map((entry) => entry.trim());
}
if (Array.isArray(queryReplacement)) {
values = queryReplacement as IDataObject[];
} else {
throw new NodeOperationError(
this.getNode(),
'Query Replacement must be a string of comma-separated values, or an array of values',
{ itemIndex: i },
);
}
queries.push({ query, values });
}
return runQueries(queries, items, nodeOptions);
}