Joshua D. Drake wrote:
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
The planner will not use the index listed
Joshua D. Drake [EMAIL PROTECTED] writes:
I guess where I got confused is:
http://www.postgresql.org/docs/8.1/static/indexes-multicolumn.html
And explicitly:
A multicolumn B-tree index can be used with query conditions that
involve any subset of the index's columns, but the index is
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
I guess where I got confused is:
http://www.postgresql.org/docs/8.1/static/indexes-multicolumn.html
And explicitly:
A multicolumn B-tree index can be used with query conditions that
involve any subset of the index's columns, but the
Joshua D. Drake [EMAIL PROTECTED] writes:
Tom Lane wrote:
That statement seems perfectly accurate to me.
Considering an index of a,b if I search for b I would expect that the
planner could use the index.
It can. Whether it will think that's a good idea is another question
entirely, and one
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
Um, the subject is CE, but the question is about an index ? Those are
separate issues.
The planner will not use the index listed above.
For what?
select adate from parent
Joshua D. Drake [EMAIL PROTECTED] writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
The planner will not use the index listed above.
For what?
regards, tom lane
---(end of
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
The planner will not use the index listed above.
For what?
select adate from parent where adate = '01-25-2007'
For
Joshua D. Drake [EMAIL PROTECTED] writes:
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
The planner will not use the index listed above.
For what?
select adate from
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Tom Lane wrote:
Joshua D. Drake [EMAIL PROTECTED] writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate '01-01-2007' AND adate '04-01-2007');
The planner will not use the index listed above.
For what?
select
