prestodb/presto · error · SQLException

No wrapper for

Error message

No wrapper for 

What it means

unwrap in PrestoStatement returns this when iface.isInstance(this) holds; otherwise this SQLException is thrown. It is the standard JDBC wrapper guard: it fires when the caller requests an interface (e.g. a vendor extension or optional JDBC feature) that PrestoStatement does not implement.

Source

Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoStatement.java:612

    }

    @Override
    public boolean isCloseOnCompletion()
            throws SQLException
    {
        checkOpen();
        return closeOnCompletion.get();
    }

    @SuppressWarnings("unchecked")
    @Override
    public <T> T unwrap(Class<T> iface)
            throws SQLException
    {
        if (isWrapperFor(iface)) {
            return (T) this;
        }
        throw new SQLException("No wrapper for " + iface);
    }

    @Override
    public boolean isWrapperFor(Class<?> iface)
            throws SQLException
    {
        return iface.isInstance(this);
    }

    public String getUpdateType()
            throws SQLException
    {
        checkOpen();
        return currentUpdateType.get();
    }

    public void partialCancel()
            throws SQLException

View on GitHub (pinned to 55bb57d202)

Solutions

1. Check isWrapperFor(iface) before calling unwrap
2. Only request interfaces actually implemented by PrestoStatement
3. Catch SQLException around unwrap when probing optional JDBC interfaces

When it happens

Trigger: Thrown at presto-jdbc/src/main/java/com/facebook/presto/jdbc/PrestoStatement.java:612 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/5fe83c55f8aa943e. Report an issue: GitHub.