| Almost all good DBMS (Database Management | | | | Cause |
| System) are built with some sort of metadata | | | | The fundamental cause for the occurrence of the |
| structure (data dictionary) and MS SQL is no | | | | above error message is corruption or damage in |
| exception. You can view the metadata either through | | | | metadata structure. This happens when sysindexes |
| the INFORMATION_SCHEMA views or varied | | | | think that the table contains a clustered index and |
| system tables. Corruption in metadata structure results | | | | sysobjects think the table contains a heap index. |
| in an error message, which mostly pops up at the | | | | Metadata structure can be corrupted either due to |
| mounting of your database. This error message halts | | | | logical or physical reasons. |
| the database mounting process, making all its records | | | | Resolution |
| inaccessible. For complete and easy access of | | | | A complete resolution of the above error message |
| database records, it is always advisable to firstly | | | | can be achieved by following the below measures: |
| restore the database records from an updated and | | | | - To overcome physical damage problems, you will |
| complete backup. However, with case studies proving | | | | need to firstly check for the component that has been |
| that the database backup can also be easily | | | | damaged. Change the damaged system component |
| corrupted, it is always beneficial to have a powerful sql | | | | with the new one. |
| database repair software that can overcome any | | | | - To surmount all logical corruption issues, you will need |
| database corruption scenario. | | | | to run DBCC CHECKDB command using appropriate |
| For example, you might encounter below error | | | | repair clause. |
| message while trying to access some records saved | | | | While the logical corruption problems are resolved |
| in your database: | | | | using DBCC CHECKDB command, there are still some |
| "System table mismatch: Table 'O_NAME' object ID | | | | possibilities that database is not repaired. In such |
| O_ID has index id 1 in sysindexes but the status in | | | | situations, you will need to use powerful third-party sql |
| sysobjects does not have the clustered bit set. The | | | | database repair tool. These SQL Repair tools can be |
| table will be checked as a heap." | | | | easily understood by both technical and non-technical |
| The above error message makes your database | | | | users. |
| records inaccessible. | | | | |