How to fix Error 10102 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: Error 10102 – Cannot Create Index on View Containing TABLESAMPLE Clause

Why This Error Happens

This error occurs because SQL Server 2025 does not support creating indexed views (materialized views) on view definitions that include the TABLESAMPLE clause. The TABLESAMPLE clause returns a non-deterministic subset of rows from a table, which conflicts with the core requirement of indexed views that the underlying result set must be deterministic and reproducible. Since SQL Server needs to maintain a persisted, consistent copy of the view’s data in the unique clustered index, any randomness introduced by TABLESAMPLE makes this impossible to guarantee.

Step-by-Step Resolution Guide

Step 1: Identify the Offending View Definition

  • Open SQL Server Management Studio (SSMS) and connect to your SQL Server 2025 instance.
  • Run the following query to locate the view causing the issue:
SELECT definition FROM sys.sql_modules WHERE object_id = OBJECT_ID('YourViewName');
  • Look specifically for the TABLESAMPLE keyword within the FROM clause of the view script.

Step 2: Remove the TABLESAMPLE Clause from the View

  • Since indexed views require deterministic data, you must alter the view to remove the sampling logic.
  • Use ALTER VIEW to rewrite the definition without TABLESAMPLE:
ALTER VIEW dbo.YourViewName
WITH SCHEMABINDING
AS
SELECT Column1, Column2
FROM dbo.YourTable; -- TABLESAMPLE clause removed
  • Ensure WITH SCHEMABINDING is included, as this is a mandatory prerequisite for creating an index on a view, separate from the TABLESAMPLE issue.

Step 3: Re-attempt the Index Creation

  • Once the view definition is clean, run the CREATE INDEX command again to create the unique clustered index required for the materialized view.
  • Example syntax:
CREATE UNIQUE CLUSTERED INDEX IDX_View_Unique 
ON dbo.YourViewName (Column1);
  • Verify the command completes without throwing Error 10102.

Step 4: Implement Sampling Logic Outside the View (If Required)

  • If you specifically needed TABLESAMPLE for performance testing or data science sampling, do not use an indexed view for this purpose.
  • Instead, create a standard (non-indexed) view with TABLESAMPLE, or move the sampling logic into a stored procedure or ad-hoc query executed against the base table directly.

Alternative or Verification Steps

  • Verification: Check the sys.indexes catalog view to confirm the new index exists and is valid by running SELECT * FROM sys.indexes WHERE object_id = OBJECT_ID('YourViewName');.
  • Alternative: If deterministic sampling is a hard requirement, consider using a WHERE clause based on a modulo operation on a deterministic key (e.g., WHERE RowID % 10 = 0) instead of TABLESAMPLE, as this approach remains compatible with schema-bound indexed views.