I'm experiencing a strange problem with postgresql 8.3.4.
I have the following table
datequeued timestamp default now()
every time a new tx is created in the table I need to check if it's the result of 2 previous transaction being aggregated:
I receive 2 tx with the following values:
securityid, portfolioid, tradedate, numshares, transactiontype, tradeprice
2, 1, '2008-12-08', 2, 'B', 15.23
2, 1, '2008-12-08', 6, 'B', 15.23
Later I'll receive another tx:
2, 1, '2008-12-08', 8, 'B', 15.23
This isn't a new trade but just the sum of the previous 2 it should be therefore ignored.
To create the tx in the table I use a function which receives all the values and runs the following query to check whether it's a sum of previous txs. (The tradedate is passed as a timestamp)
SELECT INTO vpsum sub1.possible_sum
SELECT tq.securityid, date_trunc('hour', tq.datequeued) AS split_tq_time, count(*) AS cnt,
sum(tq.numshares) as possible_sum, tq.transactiontype, tq.tradeprice, tq.portfolioid
FROM tx_queue AS tq
WHERE tq.securityid= 2
AND tq.tradeprice = 15.23
AND tq.portfolioid = 1
AND tq.tradedate = '2008-12-08 02:00:00'
AND tq.datequeued + interval '1 hour' <= now() -- tx received more than 1 hour ago
GROUP BY date_trunc('hour', tq.datequeued), tq.securityid, tq.portfolioid, tq.tradeprice, tq.transactiontype
) AS sub1
WHERE sub1.possible_sum = 8.0000000
ORDER BY sub1.split_tq_time DESC
If I run this query from the psql client it works just fine. From the function it doesn't return anything.
What I discovered is that for it to work from the function I need to explicitly cast the tradedate variable to DATE (ie '2008-12-08 02:00:00'::DATE - Note the field is of type date).
It would seem that the psql client casts the value automatically.
Any reason why this should be?
This inconsistent behaviour makes code much harder to debug.
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pgsql-sql by date
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