Hi, without seeing the error and an example, it's hard to help.
Are you sure that xx is a string? You may need to convert it beforehand with CAST(xx AS VARCHAR) On Tue, Jan 5, 2021 at 3:12 AM <abc15...@163.com> wrote: > What can i do? > > 发自我的iPhone > -- Arvid Heise | Senior Java Developer <https://www.ververica.com/> Follow us @VervericaData -- Join Flink Forward <https://flink-forward.org/> - The Apache Flink Conference Stream Processing | Event Driven | Real Time -- Ververica GmbH | Invalidenstrasse 115, 10115 Berlin, Germany -- Ververica GmbH Registered at Amtsgericht Charlottenburg: HRB 158244 B Managing Directors: Timothy Alexander Steinert, Yip Park Tung Jason, Ji (Toni) Cheng
