As the name suggests, a nested subprocedure allows us to write a function or procedure nested within another function or procedure. It means a function can have another function within it, just like its own variable. And, as this inner function is part of the outer function, it has no visibility outside the function that encloses it. Also, there is no catalog entry created for the nested function. Continue reading on PostgresRocks to see some examples of nested subprocedures >>
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