I have a query which bugs me:

select espclo_ouverture.*, espclo_ouverture_local.desclocal, espclo_ouverture_type.descforme  
from {oj espclo_ouverture  
	left outer join espclo_ouverture_local  
		on espclo_ouverture.idlocal = espclo_ouverture_local.idlocal  
	left outer join espclo_ouverture_type  
		on espclo_ouverture.idforme = espclo_ouverture_type.idforme}
where espclo_ouverture.idespclo = 32  order by espclo_ouverture.noouvert

That query actually runs fine, but I don't understand what the {oj does! I wrote that query but I don't remember putting that there. If I remove just the "oj", leaving the curly braces I get "Syntax error or access violation". It can't be just a typo because the curly braces close just before the WHERE clause. If I remove all that (plus the closing brace), the query still runs fine, as I expected.

I can't find anything in Books Online about this.