This version updates the patch to CVS HEAD and has various fixes and refactoring, including proper docs. I refactored get_opclass_name() into lsyscache.c, but then realized that this means that lsyscache.c will depend on commands/indexcmds.c (for GetDefaultOpClass()), which is arguably improper, so I'm tempted to revert and just duplicate the syscache lookups in both ruleutils.c and parse_utilcmd.c
Yes, I too would vote for duplicating the lookups for the sake of simplicity.
Nikhil: why are both "options" and "inhreloptions" necessary in IndexStmt? Won't at least one be NULL?
Yes, in the CREATE..LIKE case, options will be NULL and in the normal CREATE..INDEX case inhreloptions will be NULL. Note that options is a List of DefElem entries, whereas inhreloptions is a char pointer.
The challenge was with converting the stored reloptions belonging to the parent index into some form which could be consumed by transformRelOptions(). It was difficult to convert it into a list of DefElem entries and hence I had to introduce inhreloptions.
