Help Center/ Data Replication Service/ Troubleshooting/ Solutions to Failed Check Items/ Database Parameters/ Whether the Source Database Tables Contain Primary Keys

Updated on 2023-09-06 GMT+08:00

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Whether the Source Database Tables Contain Primary Keys

MySQL as the Source

**Table 1** Checking whether the source database tables contain primary keys
Check Item	Whether the source database tables contain primary keys
Description	The tables to be synchronized in the source database do not contain primary keys.
Item to Be Confirmed and Handling Suggestion	Item to be confirmed: The tables to be synchronized in the source database do not contain primary keys. Handling suggestion: Create primary keys for the tables as the performance of a table without a primary key is lower than that of a table with a primary key.

Parent topic: Database Parameters

Previous topic: Whether the Selected Table Contains Delay Constraints

Next topic: Whether Foreign Keys Are Disabled or Tables to Be Synchronized Have Foreign Keys in the Destination Database

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