Hi Tom,
Thanks for your suggestion.
I got it working:
CREATE OR REPLACE FUNCTION s.updatefunc1(BigInt[], BigInt[])
RETURNS void as $$
BEGIN
FOR i IN array_lower($1, 1) .. array_upper($1, 1)
LOOP
update s.t1
SET c3 = $2[i]
WHERE c2 = $1[i];
END LOOP;
END;
$$
LANGUAGE plpgsql;
Is there a better way to do it using : unnest.
Thanks
Shankha Banerjee
On Fri, Jul 1, 2016 at 10:59 AM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
> shankha <shankhabanerjee@xxxxxxxxx> writes:
>> PREPARE updatearrayplan(BigInt[], BigInt[]) AS
>> for i in size($1)
>> DO
>> update s.t1
>> SET c3 = $2[$i]
>> WHERE c2 = $1[$i]
>> END FOR
>
>> In this prepared statement I am just trying to explain the algorithm.
>> I do not know the exact syntax.
>
> You would need to write a plpgsql function in order to have a loop like
> that; there's no loops in bare SQL.
>
> regards, tom lane
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