Limitations and considerations

You should be aware of the following limitations and considerations when using a Microsoft Azure SQL (MS-CDC) source:

• A Secondary Microsoft Azure SQL Managed Instance is not supported as a source database.
• Sparse tables are not supported.
• Replicating data from indexed views is not supported.
• Limitations due to the requirement to have MS-CDC enabled on all source tables include:
  • Truncate table is not supported
  • WRITETEXT and UPDATETEXT utilities are not supported

  For more information on MS-CDC limitations, see the Microsoft Help.

• During change processing, any tables with computed columns will be suspended. If you need to run an Apply Changes and/or Store Changes task that captures changes from tables with computed columns, you should define a transformation to exclude such columns from the task.
• Partition switching is not supported.

• The following DML pattern is not supported:

  select <*> into <new_table> from <existing_table>

• Column-level encryption is not supported.
• When inserting a value into Microsoft Azure SQL Managed Instance spatial data types (GEOGRAPHY and GEOMETRY), one can either ignore the SRID (Spatial Reference System Identifier) property - in which case the default SRID will be used (0 for GEOMETRY and 4326 for GEOGRAPHY) - or specify a different number. When replicating tables with spatial data types, Replicate replaces the SRID that was inserted by user with the default SRID.
• Columnstore indexes are not supported.
• Memory-optimized tables (using In-Memory OLTP) are not supported.
• Temporal databases are not supported
• Delayed durability is not supported
• Due to an ODBC limitation, no more than 16 columns can be part of a Primary Key.
• Masked data will be created in the target without masking.

• OpenLDAP is not supported

• Replication from databases configured to use ADR (Accelerated Database Recovery) is not supported.

• Replicating a table or schema with an apostrophe (') in its name is not supported.

• Changes applied to the database using DACPAC will not be captured.

• MS-CDC Change Tables with fixed size columns (including NCHAR and CHAR data), the sum of which exceeds 8060 bytes, are not supported.

Non-supported security features

Tables that use the following security features are not supported:

• Always Encrypted
• Row-Level Security

Unsupported data types

The following data types are not supported:

• CURSOR
• SQL_VARIANT
• TABLE