2.1.2.246 T581, Regular expression substring function
V0282:
The specification states the following:
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Subclause 6.30, "<string value function>": <regular expression substring function> ::= SUBSTRING <left paren> <character value expression> SIMILAR <character value expression> ESCAPE <escape character> <right paren> ... Conformance Rules Without Feature T581, "Regular expression substring function", conforming SQL language shall not contain a <regular expression substring function>.
Microsoft SQL Server 2008 R2 and Microsoft SQL Server 2012 vary as follows:
Transact-SQL does not support this feature.