New/group fetch and fetch optionals

[atm-irvine]

NEW|New group classic fetch and fetch optionals depending on conf

I've grouped classic fetch and fetch optionals to prevent doing multiple sql requests for the same result. For invoice and its lines. All of this depends on MAIN_DO_FETCH_IN_ONE_SQL_REQUEST conf.
Once this PR is merged, I'll do it for every document.

[hregis]

@eldy @atm-irvine the sql function "ST_AsWKT()" is not compatible with Postgresql no ?
the use of this sql function is also in "fetch_optionals()" function of commonobject.class.php" !

[atm-irvine]

@hregis This function is available if you activate an option on PostgreSQL, apparently. Since it was already in the core, I took the liberty of taking it.

[hregis]

@atm-irvine are you talking about PostGIS?

https://postgis.net/

If yes the name of the function is not the same :

https://postgis.net/docs/ST_AsEWKT.html

ST_AsEWKT Instead of ST_AsWKT

Maybe the better is to use ST_AsText

https://postgis.net/docs/ST_AsText.html

ST_AsWKT is an alias of ST_AsText with Mysql/MariaDB

And what happens if PostGIS can not be installed?

Thanks

[atm-irvine]

@eldy What do you think about that ?

[atm-irvine]

@hregis Tbh I don't know. I just took the code.. Eldy will tell us what to do

[hregis]

@eldy it's possible to check if PostGIS is enabled with "PostGIS_Version()"
https://postgis.net/docs/PostGIS_Version.html

maybe add a specific function in sql drivers for this to avoid errors ?