| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "Rajesh Kumar Mallah(dot)" <mallah(at)trade-india(dot)com> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Difference between is true and = 't' in boolean feild. & bitmap |
| Date: | 2002-08-17 11:21:20 |
| Message-ID: | 200208171121.g7HBLKL18248@candle.pha.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-sql |
Rajesh Kumar Mallah. wrote:
>
>
> Any can anyone explain me why in a query of a boolean feild
> "is ture" does not indexes where as = 't' does? is "is true"
> not a more standard SQL than " = 't' ".
Not sure.
> Also is there any working implementation of BITMAP INDEXES in
> postgresql as found in ORACLE?
We have discussed them and see a few uses for them. See the TODO list
under Performance and there is a link to some emails discussing it.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
| From | Date | Subject | |
|---|---|---|---|
| Next Message | JOE | 2002-08-18 01:07:59 | Unexplained SQL behavior |
| Previous Message | Rajesh Kumar Mallah. | 2002-08-17 05:32:58 | Difference between is true and = 't' in boolean feild. & bitmap indexes |