On 29/12/12 10:19, Peter Eisentraut wrote:
On 12/28/12 11:22 AM, Pavel Stehule wrote:
I am not sure, but maybe is time to introduce ANSI SQL syntax for
functions' named parameters
It is defined in ANSI SQL 2011
CALL P (B => 1, A => 2)
instead PostgreSQL syntax CALL ( B := 1, A := 2)
I agree it's probably time.
* should we support both - probably yes
yes
* how long time we will support pg syntax? - 2..5..ever years
* when we mark pg syntax as obsolete?
* when we remove pg syntax?
The := syntax was introduced in 9.0, so it is by now well entrenched. I
don't think we should remove it at all any time soon.
As for documentation, just state how it is. The standard syntax is =>,
but because of $various_issues, older versions only support :=.
To be honest I prefer := as it looks neater than
=>, in part because I first saw that notation when I was learning ALGOL 60 and liked the justification they gave in the manual.
In fact I find
=> ugly and counter intuitive as I keep having the feeling that it points the wrong way, because
A => 2 suggests to me that you are setting '2' to the value of 'A' which is plain daft!
I am sure there are worse standardisation formats - but for some reason, I find this one disproportionately irritating! :-)
So I would much prefer to keep the old format, if at all possible.
Cheers,
Gavin
