prestodb/presto · error · SQLFeatureNotSupportedException

getNString

Error message

getNString

What it means

Sentinel method in PrestoResultSet: getNString (national character string retrieval) is not implemented by the Presto JDBC driver and always throws SQLFeatureNotSupportedException with the method name as the message.

Source

Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoResultSet.java:1398

    @Override
    public void updateSQLXML(int columnIndex, SQLXML xmlObject)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("updateSQLXML");
    }

    @Override
    public void updateSQLXML(String columnLabel, SQLXML xmlObject)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("updateSQLXML");
    }

    @Override
    public String getNString(int columnIndex)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("getNString");
    }

    @Override
    public String getNString(String columnLabel)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("getNString");
    }

    @Override
    public Reader getNCharacterStream(int columnIndex)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("getNCharacterStream");
    }

    @Override
    public Reader getNCharacterStream(String columnLabel)

View on GitHub (pinned to 55bb57d202)

Solutions

1. Use getString to read character columns, including NVARCHAR data
2. Convert encoding in application code if needed
3. Avoid N-string getters with the Presto driver

When it happens

Trigger: Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoResultSet.java:1398 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/12b174be2aad8fb2. Report an issue: GitHub.