Register more string functions (NH-3193)

Author: hazzik

src/NHibernate/Dialect/MsSqlCeDialect.cs

@@ -54,6 +54,14 @@ public MsSqlCeDialect()
 RegisterFunction("year", new SQLFunctionTemplate(NHibernateUtil.Int32, "datepart(year, ?1)"));
 
 RegisterFunction("length", new StandardSQLFunction("len", NHibernateUtil.Int32));
+RegisterFunction("locate", new StandardSQLFunction("charindex", NHibernateUtil.Int32));
+RegisterFunction("replace", new StandardSafeSQLFunction("replace", NHibernateUtil.String, 3));
+RegisterFunction("rtrim", new StandardSQLFunction("rtrim"));
+RegisterFunction("ltrim", new StandardSQLFunction("ltrim"));
+RegisterFunction("upper", new StandardSQLFunction("upper"));
+RegisterFunction("lower", new StandardSQLFunction("lower"));
+
+RegisterFunction("trim", new AnsiTrimEmulationFunction());
 
 RegisterFunction("concat", new VarArgsSQLFunction(NHibernateUtil.String, "(", "+", ")"));