sql server - SQL Table Valued Parameter - Default Value -

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i'm passing table valued parameter stored procedure use in clause, want check whether parameter has been passed-in or not first. best way check parameter of type? example, want select along lines of:

select *  tablename @tvp null or recordid in (select * @tvp)

if parameter of table valued type not passed, empty table. can use:

select *  tablename not exists(select * @tvp)     or recordid in (select * @tvp)

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