[HACKERS] validating foreign tables

[Andrew Dunstan]

The API for FDW validators doesn't appear to have any way that the 
validator function can check that the defined foreign table shape 
matches the FDW options sanely. Maybe it's a chicken and egg problem, 
but there seems to be something missing, unless I'm mistaken. We'll have 
the info when we come to make plan estimates, but that seems like the 
wrong place to be doing this sort of validation. Can we extend the 
validator API somehow to make this possible?

cheers
andrew


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