If the property are unoptimised then in report defination it tries to read form Blob, so if udf are not installed if you run these query directly on the DB you will get no response or else you will get some rows. as with udf installation these function are installed.
select pr_read_from_stream('pzInsKey', 'pzInsKey',pzPVStream) as "StringValue",
pr_read_int_from_stream('pzRuleSetVersionMajor', 'pzInsKey',pzPVStream) as "IntegerValue",
pr_read_decimal_from_stream('pzRuleSetVersionMinor', 'pzInsKey', pzPVStream) as "DecimalValue"