\parse

Creates a prepared statement from the current query buffer, based on the name of a destination prepared-statement object. An empty string denotes the unnamed prepared statement.

Example:

SELECT $1 \parse stmt1

This command causes the extended query protocol to be used, unlike normal psql operation, which uses the simple query protocol. A Parse (F) message will be issued by this command so it can be useful to test the extended query protocol from psql. This command affects only the next query executed; all subsequent queries will use the simple query protocol by default.