It seems that pgAccess has as much trouble as I have with arrays ...
and perhaps more since I can't even run the queries below in it.
Does anyone have information on those damned arrays ?
Here is the text of a message I have posted on NOVICE
without success up to now.
********************************
I'd like to make some selections on values in arrays.
I know I could use a more 'SQL-correct' way to achieve this.
(create another table, link it to the first one and so on.)
But I was playing with arrays and I was wondering ...
I give an exemple to make my question clear (I hope)
let's say I store some values in a 2 dim array :
create table myfunction ( id int4, name text, args
text[][]);
insert into myfunction values( 1, 'func1', '{{"key1", "value1"}, {"key2",
"value2"}}'); insert into myfunction values( 2, 'func2', '{{"key1", "value1"},
{"key2","value5"}, {"key3",
"value2"}}');
everything's OK.
I can store my values.
I can retrieve them : select args from myfunction where name = 'func1';
or select myfunction.args[1][2] where id = 2;
or even select myfunction.args[1:1][1:2] where id = 2;
with some trial & errors it works.
But I can't manage to look into myfunction.args,
I mean something like select name from myfunction where myfunction.args [][2] = 'value2';
or select name from myfunction where myfunction.args ~~ '%value2%';
if I don't know where is value2 in my array (if it exists).
Which operators can I use ?
How can I inspect an array-field ?
Any information on arrays would be welcome.
--
Spirou
Un club Linux pour les Carolos -->
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