2.1.2.240 T521, Named arguments in CALL statement

V0276:

The specification states the following:

 Subclause 10.4, "<routine invocation>":
  
 <named argument specification> ::=
 <SQL parameter name> <named argument assignment token>
 <named argument SQL argument>
  
 ...
  
 Conformance Rules:
  
 Without Feature T521, "Named arguments in CALL statement", conforming SQL language shall not contain a <named argument specification>.

Microsoft SQL Server 2008 R2 varies as follows:

This feature is absent from the [ISO/IEC9075-2:2008] standard.

Microsoft SQL Server 2012 varies as follows:

Transact-SQL does not support this feature.