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
>
>
>
>


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