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qiancai authored Oct 23, 2024
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Since v5.3.0, TiCDC supports [global temporary tables](/temporary-tables.md#global-temporary-tables). Replicating global temporary tables to the downstream using TiCDC of a version earlier than v5.3.0 causes table definition error.

If the upstream cluster contains a global temporary table, the downstream TiDB cluster is expected to be v5.3.0 or a later version. Otherwise, an error occurs during the replication process.

### Compatibility with vector data types

Starting from v8.4.0, TiCDC supports replicating tables with [vector data types](/vector-search-data-types.md) to downstream (experimental).

When the downstream is Kafka or a storage service (such as Amazon S3, GCS, Azure Blob Storage, or NFS), TiCDC converts vector data types into string types before writing to the downstream.

When the downstream is a MySQL-compatible database that does not support vector data types, TiCDC fails to write DDL events involving vector types to the downstream. In this case, add the `has-vector-type=true` parameter to `sink-url`, which allows TiCDC to convert vector data types into the `LONGTEXT` type before writing.

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