OBJECT_ID for a PK or Index

Question

Hi friends,
With a need for the first time to check if a PK and an Index exists before dropping and re-creating the same need your help.
IF OBJECT_ID(N'PK_LMT', N'PK') IS NOT NULL SELECT 1 (does not work and reflects Command(s) completed successfully)
IF OBJECT_ID('PK_LMT', 'PK') IS NOT NULL SELECT 1 (does not work and Command(s) completed successfully)
While:
SELECT * FROM SYS.objects WHERE NAME = 'PK_LMT' (does reflect the same)
Similarly how to check if an index (named IX_LGUF_DT_CUST) exists? Is it only to check from sys.indexes?
Thanks for all your help.

Answer 1

Please check if your SQL Login has enough permission. Moreover, please use OBJECT_ID() function without specifying the object type. Also, please specify the database name like this:
SELECT OBJECT_ID('AdventureWorks2014..PK_ErrorLog_ErrorLogID');
If it is not in the default schema, please type the full name. 
More info: OBJECT_ID (Transact-SQL)
About the second question, as Erland noted we can use sys.indexes, but we have to filter it based on the specific table like this:
SELECT *
FROM sys.indexes
WHERE name = 'IX_LGUF_DT_CUST'
AND object_id = OBJECT_ID('TableName');
Cheers,
Saeid Hasani
Database Consultant
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