Обсуждение: Indexed Views

You simply index the underlying table.

Sean



On 2/15/06 10:35 AM, "Ketema Harris" <ketema@gmail.com> wrote:

> Does postgreSQL have the ability to index a view?  Or index a computed
column
> such as an aggregate?

Thanks

Dear group,
 I wrote a function to return the number of records
that has this query term associated with.

Something is going wrong. Looking forward some help to
correct this function.
Could some one help if this function is correct way,
or please suggest other way please.

Thanks
srini

SQL query and result:
test=# select distinct seq_name from sequence, go_seq,
gos where gos.go_term = 'protein binding' AND
gos.gos_id = go_seq.gos_id AND go_seq.seq_id =
sequence.seq_id ;
   seq_name
---------------
 A2M
 AATF
 ABCD1
 ABCD2
 ABCD3
.......
.......
 ZP3
 ZRANB1
 ZW10
 ZYX
(3862 rows)

===================================================
Function:
CREATE FUNCTION fetch_count_fterm(term) RETURNS char
AS '
DECLARE
        referrer_keys1 RECORD;
        fterm ALIAS FOR $1;
        mcounts integer;
BEGIN
        referrer_keys1 IN SELECT distinct seq_name
from sequence,go_seq,gos where gos.go_term = fterm AND
gos.gos_id = go_seq.gos_id AND go_seq.seq_id =
sequence.seq_id
       mcounts := select count(*) from referrer_keys1
        return mcounts;
END;
' LANGUAGE plpgsql;

test=# \i fetch_Fterm.sql
psql:fetch_Fterm.sql:11: ERROR:  type term does not
exist
test=#



Could some one help if this function is correct way,
or please suggest other way please.

Thanks



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On 2/15/06 12:41 PM, "Srinivas Iyyer" <srini_iyyer_bio@yahoo.com> wrote:

> Dear group,
>  I wrote a function to return the number of records
> that has this query term associated with.
>
> Something is going wrong. Looking forward some help to
> correct this function.
> Could some one help if this function is correct way,
> or please suggest other way please.
>
> Thanks
> srini
>
> SQL query and result:
> test=# select distinct seq_name from sequence, go_seq,
> gos where gos.go_term = 'protein binding' AND
> gos.gos_id = go_seq.gos_id AND go_seq.seq_id =
> sequence.seq_id ;
>    seq_name
> ---------------
>  A2M
>  AATF
>  ABCD1
>  ABCD2
>  ABCD3
> .......
> .......
>  ZP3
>  ZRANB1
>  ZW10
>  ZYX
> (3862 rows)
>
> ===================================================
> Function:
> CREATE FUNCTION fetch_count_fterm(term) RETURNS char
                                    ^^^^

Should be a data type (like "TEXT").
> AS '
> DECLARE
>         referrer_keys1 RECORD;
>         fterm ALIAS FOR $1;
>         mcounts integer;
> BEGIN
>         referrer_keys1 IN SELECT distinct seq_name
> from sequence,go_seq,gos where gos.go_term = fterm AND
> gos.gos_id = go_seq.gos_id AND go_seq.seq_id =
> sequence.seq_id
>        mcounts := select count(*) from referrer_keys1
>         return mcounts;
> END;
> ' LANGUAGE plpgsql;
>
> test=# \i fetch_Fterm.sql
> psql:fetch_Fterm.sql:11: ERROR:  type term does not
> exist
> test=#
>
>
>
> Could some one help if this function is correct way,
> or please suggest other way please.
>
> Thanks
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match