prestodb/presto · error · SQLFeatureNotSupportedException

getNClob

Error message

getNClob

What it means

Sentinel accessor in PrestoResultSet: getNClob always throws SQLFeatureNotSupportedException with the method name as the message because national-character Lob reads are not implemented by the Presto JDBC driver.

Source

Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoResultSet.java:1356

    @Override
    public void updateNClob(int columnIndex, NClob nClob)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("updateNClob");
    }

    @Override
    public void updateNClob(String columnLabel, NClob nClob)
            throws SQLException
    {
        throw new SQLFeatureNotSupportedException("updateNClob");
    }

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

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

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

    @Override
    public SQLXML getSQLXML(String columnLabel)

View on GitHub (pinned to 55bb57d202)

Solutions

1. Read the column as a String via getString instead of getNClob
2. Cast/convert in application code if NClob-like semantics are required
3. Avoid NClob getters when using Presto result sets

When it happens

Trigger: Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoResultSet.java:1356 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/8bb5dfd03403ee2a. Report an issue: GitHub.