Re: [GENERAL] Trouble with text search select statement

2008-04-30 Thread Mont Rothstein 
Thank you.  I knew it had to be something simple.
Much appreciated.

-Mont

Re: [GENERAL] Trouble with text search select statement

2008-04-30 Thread Klint Gore 

Mont Rothstein wrote:
I am having trouble getting a multiple column text search select 
statement to work.


I've setup the following:

CREATE TABLE tstest (col1 text, col2 text);
INSERT INTO tstest (col1, col2) VALUES ('bird', 'moon');
CREATE INDEX tstest_ts_idx ON tstest USING gin(to_tsvector('english', 
coalesce(col1, '') || '' || coalesce(col2, '')));


I then execute what I believe is the correct select statement:

SELECT * FROM tstest WHERE to_tsvector('english', coalesce(col1, '') 
|| '' || coalesce(col2, '')) @@ to_tsquery('english', 'bird');


If I remove the second column from the to_tsvector in the select 
statement then it returns the row.


SELECT * FROM tstest WHERE to_tsvector('english', coalesce(col1, '')) 
@@ to_tsquery('english', 'bird');


I know I've missed something basic but I can't figure out what.

As a side note I don't understand the purpose of the || '' || between 
the columns in the to_tsvector.  I saw it in several examples.  I've 
tried both with and without it with no change.
'' isn't supposed to to be the empty string, it's supposed to be a 
quoted space.  to_tsvector separates on whitespace. So with the space, 
it will have the words bird and moon.Without the space, it will have the 
single word birdmoon.


klint.

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Klint Gore
Database Manager
Sheep CRC
A.G.B.U.
University of New England
Armidale NSW 2350

Ph: 02 6773 3789  
Fax: 02 6773 3266

EMail: [EMAIL PROTECTED]


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[GENERAL] Trouble with text search select statement

2008-04-30 Thread Mont Rothstein 
I am having trouble getting a multiple column text search select statement
to work.

I've setup the following:

CREATE TABLE tstest (col1 text, col2 text);
INSERT INTO tstest (col1, col2) VALUES ('bird', 'moon');
CREATE INDEX tstest_ts_idx ON tstest USING gin(to_tsvector('english',
coalesce(col1, '') || '' || coalesce(col2, '')));

I then execute what I believe is the correct select statement:

SELECT * FROM tstest WHERE to_tsvector('english', coalesce(col1, '') || ''
|| coalesce(col2, '')) @@ to_tsquery('english', 'bird');

If I remove the second column from the to_tsvector in the select statement
then it returns the row.

SELECT * FROM tstest WHERE to_tsvector('english', coalesce(col1, '')) @@
to_tsquery('english', 'bird');

I know I've missed something basic but I can't figure out what.

As a side note I don't understand the purpose of the || '' || between the
columns in the to_tsvector.  I saw it in several examples.  I've tried both
with and without it with no change.

Thanks in advance.

-Mont