On 2020-Nov-24, Andy Fan wrote: > then we modified the copy/read/out functions for this node. In > _readFuncExpr, > we probably add something like
> [ ... ] > Then we will get a compatible issue if we create a view with the node in > the older version and access the view with the new binary. When nodes are modified, you have to increment CATALOG_VERSION_NO which makes the new code incompatible with a datadir previously created -- for precisely this reason.
