The following bug has been logged on the website:
Bug reference: 9227
Logged by: Joshua Yanovski
Email address: pythonesque(at)gmail(dot)com
PostgreSQL version: 9.3.2
Operating system: Ubuntu 12.0.4
Description:
# SELECT ROW (1) OVERLAPS ROW (2);
ERROR: XX000: unrecognized node type: 656
LOCATION: transformExprRecurse, parse_expr.c:359
I'm not sure why this even parses, as it's not documented to do so. I do
notice, however, that in makeOverlaps in gram.y creates a recursive list
when largs or args has only one argument, which seems wrong to me.