I have a varchar field which is most commonly queried like "someField like '%abcd'". Realizing that it wouldn't be able to use an index for this type of query I created a reverse() function and an index using the function reverse(someField) so that the query would be performed as "reverse(someField
Stuart Bishop <[EMAIL PROTECTED]> writes:
> Here is a minimal test case that demonstrates the issue. Can anyone else
> reproduce these results? Of the four EXPLAIN ANALYZE SELECT statements at
> the end, the one that orders by a user created IMMUTABLE stored procedure is
> consistently slower than
Stuart Bishop wrote:
> I would like to understand what causes some of my indexes to be slower to
> use than others with PostgreSQL 8.1. On a particular table, I have an int4
> primary key, an indexed unique text 'name' column and a functional index of
> type text. The function (person_sort_key()) i
Tom Lane wrote:
> Stuart Bishop <[EMAIL PROTECTED]> writes:
>> I would like to understand what causes some of my indexes to be slower to
>> use than others with PostgreSQL 8.1.
>
> I was about to opine that it was all about different levels of
> correlation between the index order and physical tab
Stuart Bishop <[EMAIL PROTECTED]> writes:
> I would like to understand what causes some of my indexes to be slower to
> use than others with PostgreSQL 8.1.
I was about to opine that it was all about different levels of
correlation between the index order and physical table order ... but
your expe
On 10/20/06, Stuart Bishop <[EMAIL PROTECTED]> wrote:
I would like to understand what causes some of my indexes to be slower to
use than others with PostgreSQL 8.1. On a particular table, I have an int4
primary key, an indexed unique text 'name' column and a functional index of
type text. The fun
I would like to understand what causes some of my indexes to be slower to
use than others with PostgreSQL 8.1. On a particular table, I have an int4
primary key, an indexed unique text 'name' column and a functional index of
type text. The function (person_sort_key()) is declared IMMUTABLE and
RETU
