Date: Sun, 1 Mar 2020 10:17:48 +0000 (UTC)
From: Karen Goh <karenworld@yahoo.com>
To: pgsql-sql@lists.postgresql.org
Message-ID: <1063179739.1806448.1583057868061@mail.yahoo.com>
Subject: What is the right syntax for retrieving the last_insert_id() in
 Postgresql ?
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Hi,

I hope I am posting on the right forum.  I googled but I can't find any solution pertaining to my problem.

Could someone know what is the syntext for last_insert_id() in Postgresql for me to insert into my sql execute query?

public int getTutorById() {
		openConnection();
		int tutor_id = 0;
		try {
			Statement stmt3 = connection.createStatement();
			ResultSet rs = stmt3.executeQuery("SELECT last_insert_id() from xtutor");
			{
				while (rs.next()) {
					tutor_id = rs.getInt(1);							
				}
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return tutor_id;
	}

org.postgresql.util.PSQLException: ERROR: function last_insert_id() does not exist
  Hint: No function matches the given name and argument types. You might need to add explicit type casts.
  Position: 8
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2183)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:308)
	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)
	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)
	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:307)
	at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:293)
	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:270)
	at org.postgresql.jdbc.PgStatement.executeQuery(PgStatement.java:224)
	at daoMySql.tutorDAOImpl.getTutorById(tutorDAOImpl.java:202)
	at daoMySql.tutorDAOImpl.getAlltutors(tutorDAOImpl.java:161)
	at business.manager.getAlltutors(manager.java:99)

The generated id is successfully generated by JDBC.

The errors when I tested in out using PGAdmin4 is 

ERROR:  function last_insert_id() does not exist
LINE 1: SELECT last_insert_id() from xtutor;
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
SQL state: 42883
Character: 8

Postgresql 11, Windows 11

Thanks.