Re: [HACKERS] functional indexes

Added to open 6.4 bugs list.

> With the current snapshot, there seems to be problem with functional indexes.
> Example:
>
> CREATE TABLE timelog (loginname text, site varchar(16), start_time datetime,
> elapsed timespan);
> CREATE FUNCTION datetime_day (datetime ) RETURNS float8 AS 'select
> date_part(''day'', $1)' LANGUAGE 'SQL';
> INSERT INTO timelog values ('abc','varna','Thu 01 Jan 23:23:34 1998 EET','@ 10
> mins');
> INSERT INTO timelog values ('abc','sofia','Thu 01 Jan 23:23:34 1998 EET','@ 2
> hours 10 mins');
>
> $ psql test
> Welcome to the POSTGRESQL interactive sql monitor:
> Please read the file COPYRIGHT for copyright terms of POSTGRESQL
>
> type \? for help on slash commands
> type \q to quit
> type \g or terminate with semicolon to execute query
> You are currently connected to the database: test
>
> test=> create index timelog_date_idx on timelog (datetime_day(start_time));
> ERROR: DefineIndex: (null) class not found
> test=>
>
> Also, using date_part() directly in the index definition:
>
> test=> create index timelog_date_idx on timelog (datetime_part('day',
> start_time));
> ERROR: parser: parse error at or near "'"
>
>
> Can something be done about this before 6.4 is released?
>
> Daniel
>
>
>
>

--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026