Tom> As you point out, the ISO spec doesn't actually say that that
Tom> string literal has to be the external textual representation
Tom> ... but it's surely pretty bizarre that it's not a good
Tom> candidate to be the textual representation.
Yes, I'm convicned. Particularly after considering casts of strings
to intervals...
-roy
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
