Using mariadb nodeJS connector with multiple queries - node.js

Question

I've got a server running Node.js connecting to a MariaDb database. I'm using the Node.js connector and it's working fine for single queries. However, when I try to do multiple queries it's throwing this error:
{ Error: (conn=8439, no: 1064, SQLState: 42000) You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 2' at line 1
sql: SELECT 1; SELECT 2; - parameters:[]
at Object.module.exports.createError (\node_modules\mariadb\lib\misc\errors.js:55:10)
at Packet.readError (\node_modules\mariadb\lib\io\packet.js:506:19)
at Query.readResponsePacket (\node_modules\mariadb\lib\cmd\resultset.js:47:28)
at PacketInputStream.receivePacket (\node_modules\mariadb\lib\io\packet-input-stream.js:73:9)
at PacketInputStream.onData (\node_modules\mariadb\lib\io\packet-input-stream.js:129:20)
at Socket.emit (events.js:182:13)
at addChunk (_stream_readable.js:283:12)
at readableAddChunk (_stream_readable.js:264:11)
at Socket.Readable.push (_stream_readable.js:219:10)
at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)
fatal: false,
errno: 1064,
sqlState: '42000',
code: 'ER_PARSE_ERROR' }
The current test code I'm using is:
conn = await pool.getConnection({multipleStatements: true});
conn.query({
multipleStatements: true,
sql: "SELECT 1; SELECT 2;"
}).then((data: any) => {
console.log(data);
conn.end();
});
The documentation suggests multipleStatements is an option, but looking through the GitHub Repo, the only places I've found it is under lib/config/connection-options.js and the GitHub documentation. I also noticed the batch option but that seems to be specifically for a load of inserts.
Is there a way to use the mariadb-connector-nodejs to run multiple queries in a single query call? If so, what else could I be doing wrong that only multi-statement queries are not working?
Versions:
- MariaDb: 10.1.34-MariaDB
- Node.js: v10.14.2
- mariadb-connector-nodejs: mariadb#2.0.2-rc

Answer 1

multipleStatements is the good option, but as #rolandstarke indicate, that is a connection option.
When using creating pool, you indicate pool + connection options, since pool will handle connection creation. see related documentation
Example:
const mariadb = require("mariadb");
const pool = mariadb.createPool({ multipleStatements: true });
pool.query("select 1; select 2")
.then(results => {
//select 1 results
console.log(results[0]); //{ '1': 1 }
//select 2 results
console.log(results[1]); //{ '2': 2 }
})
.catch(err => {
//handle error
});