Hi all,

Is there a function similiar to Python's enumerate() [1] ? Searching
the docs didn't reveal any relevant builtin but I hope it's doable in
pgsql. Ideally I'd like a function that can be used as:

SELECT e.i, e.col1, e.col2
FROM enumerate(some_table, 'i') e
LIMIT 10

i   col1  col2
=========
0   ...     ...
1   ...     ...
...   ...     ...
9   ...     ...

Also ideally it should work on any rowset (e.g. nested select), not
just on concrete tables.

Thanks in advance,
George

[1] http://docs.python.org/library/functions.html#enumerate

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