Wondering if there's a way for postgres to return how
many elements are in a array as a single integer? For
instance, returning 10 (items in array) instead of
[-5:4]
Also, is there a way to return the position of an item
in a array?
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
