How to fix Error 4954 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: Error 4954 – ALTER TABLE SWITCH “Text in Row” Inline Limit Mismatch

Why This Error Happens

This error occurs because the “text in row” inline limit setting is a table-level property that is not inherited or validated until a SWITCH operation is attempted. When partition switching occurs between a source and target table, SQL Server requires both tables to have identical physical storage characteristics, including the text in row setting. If one table was created or altered with sp_tableoption to set a specific inline limit (e.g., 1000 bytes) while the other retains a different value or the default, the schema metadata mismatch triggers Error 4954 to prevent data corruption during the metadata-only switch.

Step-by-Step Resolution Guide

Step 1: Identify the Current Inline Limit Values

  • Open SQL Server Management Studio (SSMS) or Azure Data Studio and connect to your SQL Server 2025 instance.
  • Run the following query to check the text in row setting for both the source and target tables:
SELECT OBJECT_NAME(id) AS TableName, text_in_row_limit 
FROM sys.sysobjects 
WHERE id IN (OBJECT_ID('SourceTableName'), OBJECT_ID('TargetTableName'));
  • Note the discrepancy between the two values returned (e.g., Table A = 256, Table B = 0 or NULL).

Step 2: Align the Table Options Using sp_tableoption

  • Execute the sp_tableoption stored procedure to standardize the limit on whichever table does not match.
  • Use the exact syntax below, replacing TableName and Value with your specific inline limit size (valid range is 24 through 7000, or 0/1 to disable/enable default):
EXEC sp_tableoption 'dbo.TargetTableName', 'text in row', '1000';
  • Ensure this value exactly matches the integer value found on the partition source table in Step 1.

Step 3: Rebuild Indexes and Validate Schema

  • Since changing the text in row option physically moves data pages, rebuild the clustered index on the altered table to ensure the schema modification is fully applied on disk.
  • Navigate to the specific database file path on your Windows Server 2025 instance (typically C:\Program Files\Microsoft SQL Server\MSSQL17.MSSQLSERVER\MSSQL\DATA\) to confirm sufficient disk space exists for the rebuild operation.
ALTER INDEX ALL ON dbo.TargetTableName REBUILD;

Step 4: Re-attempt the ALTER TABLE SWITCH Command

  • Run your original partition switch command again now that the metadata properties match.
  • Confirm the operation completes without the 4954 error block.

Alternative or Verification Steps

  • Verification: Re-run the query from Step 1 immediately after the switch; both the source and target tables should now report the exact same text_in_row_limit value, and the ALTER TABLE SWITCH command should execute instantly without error.
  • Alternative: If modifying the destination table’s schema is not permitted due to application constraints, reverse the fix by altering the source table’s text in row value to match the target table’s default (usually 0) instead.