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object-id-transact-sql.md

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title description author ms.author ms.reviewer ms.date ms.service ms.subservice ms.topic f1_keywords helpviewer_keywords dev_langs monikerRange
OBJECT_ID (Transact-SQL)
OBJECT_ID returns the database object identification number of a schema-scoped object.
VanMSFT
vanto
randolphwest
04/29/2024
sql
t-sql
reference
OBJECT_ID
OBJECT_ID_TSQL
objects [SQL Server], IDs
identification numbers [SQL Server], database objects
checking object exists
IDs [SQL Server], database objects
OBJECT_ID function
database objects [SQL Server], IDs
displaying object IDs
viewing object IDs
verifying object exists
TSQL
>=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current

OBJECT_ID (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw]

Returns the database object identification number of a schema-scoped object.

Objects that aren't schema-scoped, such as Data Definition Language (DDL) triggers, can't be queried by using OBJECT_ID. For objects that aren't found in the sys.objects catalog view, obtain the object identification numbers by querying the appropriate catalog view. For example, to return the object identification number of a DDL trigger, use SELECT OBJECT_ID FROM sys.triggers WHERE name = 'DatabaseTriggerLog'.

:::image type="icon" source="../../includes/media/topic-link-icon.svg" border="false"::: Transact-SQL syntax conventions

Syntax

OBJECT_ID ( ' [ database_name . [ schema_name ] . | schema_name . ]
  object_name' [ , 'object_type' ] )

Arguments

N'object_name'

The object to be used. object_name is either varchar or nvarchar. A varchar value of object_name is implicitly converted to nvarchar. Specifying the database and schema names is optional.

N'object_type'

The schema-scoped object type. object_type is either varchar or nvarchar. A varchar value of object_type is implicitly converted to nvarchar. For a list of object types, see the type column in sys.objects (Transact-SQL).

Return types

int

Exceptions

For a spatial index, OBJECT_ID returns NULL.

Returns NULL on error.

A user can only view the metadata of securables that the user owns, or on which the user is granted permission. This means that metadata-emitting, built-in functions such as OBJECT_ID might return NULL if the user doesn't have any permission on the object. For more information, see Metadata Visibility Configuration.

Remarks

When the parameter to a system function is optional, the current database, host computer, server user, or database user is assumed. You must always follow built-in functions with parentheses.

When a temporary table name is specified, the database name must come before the temporary table name, unless the current database is tempdb. For example:

SELECT OBJECT_ID('tempdb..#mytemptable');

System functions can be used in the select list, in the WHERE clause, and anywhere an expression is allowed. For more information, see Expressions (Transact-SQL) and WHERE (Transact-SQL).

Examples

[!INCLUDE article-uses-adventureworks]

A. Return the object ID for a specified object

The following example returns the object ID for the Production.WorkOrder table in the [!INCLUDE sssampledbobject-md] database.

USE master;
GO

SELECT OBJECT_ID(N'AdventureWorks2022.Production.WorkOrder') AS 'Object ID';
GO

B. Verify that an object exists

The following example checks for the existence of a specified table by verifying that the table has an object ID. If the table exists, it is deleted. If the table doesn't exist, the DROP TABLE statement isn't executed.

USE AdventureWorks2022;
GO

IF OBJECT_ID (N'dbo.AWBuildVersion', N'U') IS NOT NULL
DROP TABLE dbo.AWBuildVersion;
GO

C. Use OBJECT_ID to specify the value of a system function parameter

The following example returns information for all indexes and partitions of the Person.Address table in the [!INCLUDE sssampledbobject-md] database by using the sys.dm_db_index_operational_stats function.

Note

[!INCLUDE synapse-analytics-od-unsupported-syntax]

When you use the [!INCLUDE tsql] functions DB_ID and OBJECT_ID to return a parameter value, always make sure that a valid ID is returned. If the database or object name can't be found, such as when they don't exist or are spelled incorrectly, both functions return NULL. The sys.dm_db_index_operational_stats function interprets NULL as a wildcard value that specifies all databases or all objects. Because this operation can be an unintentional, the example in this section demonstrates the safe way to determine database and object IDs.

DECLARE @db_id INT;
DECLARE @object_id INT;

SET @db_id = DB_ID(N'AdventureWorks2022');
SET @object_id = OBJECT_ID(N'AdventureWorks2022.Person.Address');

IF @db_id IS NULL
BEGIN
    PRINT N'Invalid database';
END;
ELSE IF @object_id IS NULL
BEGIN
    PRINT N'Invalid object';
END;
ELSE
BEGIN
    SELECT *
    FROM [sys].dm_db_index_operational_stats(@db_id, @object_id, NULL, NULL);
END;
GO

Examples: [!INCLUDE ssazuresynapse-md] and [!INCLUDE ssPDW]

D. Return the object ID for a specified object

The following example returns the object ID for the FactFinance table in the [!INCLUDE ssawPDW] database.

SELECT OBJECT_ID('AdventureWorksPDW2012.dbo.FactFinance') AS 'Object ID';

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