How do I use prepared statements in postgres?

Issue type:

[x] question [ ] bug report [ ] feature request [ ] documentation issue

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [x] postgres [ ] cockroachdb [ ] sqlite [ ] sqljs [ ] react-native [ ] expo

TypeORM version:

[x] latest [ ] @next [ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:

Hi, I want to use prepared statements in a project. Therefor I am creating an statement and later use this one. However I am getting an error that the parameters/name does not match.

queryRunner.query(
            `PREPARE MY_STATEMENT (text, text, timestamp with time zone, jsonb) as INSERT INTO DUMMY_TABLE (trip_id, vehicle_id, expiry_time, message) VALUES ($1, $2, $3, $4) ON CONFLICT (trip_id) DO UPDATE SET vehicle_id = $2, expiry_time = $3, message = $4`
        );

then in the code I am using the same queryRunner like this:

queryRunner.query("EXECUTE MY_STATEMENT ($1, $2, $3, $4)", ["tripId", "v-id", moment(), null]);

When I am running the code I am getting the following error:

error: Query failed. error: bind message supplies 4 parameters, but prepared statement "" requires 0 - EXECUTE MY_STATEMENT ($1, $2, $3, $4)
(node:58125) UnhandledPromiseRejectionWarning: QueryFailedError: bind message supplies 4 parameters, but prepared statement "" requires 0
    at new QueryFailedError (/node_modules/typeorm/error/QueryFailedError.js:11:28)
    at Query.callback (node_modules/typeorm/driver/postgres/PostgresQueryRunner.js:176:38)
    at Query.handleError (/node_modules/pg/lib/query.js:142:17)
    at Connection.connectedErrorMessageHandler (/node_modules/pg/lib/client.js:211:17)
    at Connection.emit (events.js:189:13)
    at Socket.<anonymous> (node_modules/pg/lib/connection.js:126:12)
    at Socket.emit (events.js:189:13)
    at addChunk (_stream_readable.js:284:12)
    at readableAddChunk (_stream_readable.js:265:11)
    at Socket.Readable.push (_stream_readable.js:220:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

I am using pg version 7.12.1

My server runs Postgres 10. Can someone please help me?

[jelnur]

const sql = 'SELECT * FROM table_name WHERE col_name = $1'; const result = await conn.manager.query(sql, [ param1 ]);

[imnotjames]

For stored procedures it gets weird. You’ll need to consult the postgres docs on this - we send everything over to postgres and it figures out what to do.

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For other questions, please check out the community slack or check TypeORM’s documentation page on other support avenues - cheers!