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Parameter placeholders in JDBC are defined using ? not $1 - but you don't need any parameter placeholders for the UPDATE part to begin with, because you can reference the values using the excluded keyword. String query= "INSERT INTO " + this.table+ " VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) " + "ON CONFLICT (uid) DO UPDATE SET " + "(id, rt, rid, ls, chn, ...


I have working code with Statement stmt = conn.createStatement(); stmt.execute("set search_path to '" + schema + "'");


"openJDK" is not listed within the Supported Configuration documents. Use Oracle JDK.


It looks like your lock function or key needs to take into account who set and who can release the lock (i.e. an owner). Perhaps by using a randomly generated ID. With a specific lock owner each thread has to verify that they are the owner when they set a lock and when they release a lock.

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