MySQL Error 1798: InnoDB FULLTEXT Index Type Mismatch

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Description

MySQL Error 1798 indicates that an index intended for an InnoDB FULLTEXT search operation has been defined with an incorrect data type or properties. This error typically occurs when the internal `DOC_ID` index, crucial for FULLTEXT functionality, does not meet InnoDB's specific requirements.

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Error Message

Index '%s' is of wrong type for an InnoDB FULLTEXT index

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Known Causes

3 known causes

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Invalid DOC_ID Type

The internal `DOC_ID` column for the FULLTEXT index is not `UNSIGNED BIGINT` as required by InnoDB.

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Manual Index Tampering

Direct manual creation or alteration of InnoDB's internal FULLTEXT index tables or columns.

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Schema Migration Error

Incorrect schema application during database migration, affecting InnoDB FULLTEXT index definitions.

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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

Check the error message carefully for specific details
Review recent changes that might have caused the error
Search for the exact error code in the official documentation
Check log files for additional context
Try restarting the application or service

Find Help

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Related Errors

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