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Replication schema changes
This page lists the supported schema changes to the source database when using
Cloud Data Fusion Replication .
Supported data definition language (DDL) statements in Replication
MySQL
The following table lists supported DDL statements from the MySQL source
database to the BigQuery destination.
DDL statements
Supported in Replication
Create table
Rename table
Truncate table
Drop table
Add nullable column
Add required column
Alter column to make it nullable
Alter column to make it required
Alter column type
Rename column
Drop column
Oracle
The following table lists supported DDL statements from the Oracle source
database to the BigQuery destination.
DDL statements
Supported in Replication
Create table
Rename table
Truncate table
Drop table
Add nullable column
Add required column
Alter column to make it nullable
Alter column to make it required
Alter column type
Rename column
Drop column
SQL Server
Schema changes for SQL Server are not automatic and you must perform a few
steps manually. For more information, see Change schemas in a SQL Server
replication job .
The following table lists supported DDL statements from the Microsoft SQL
Server source database to the BigQuery destination.
DDL statements
Supported in Replication
Create table
Rename table
Truncate table
Drop table
Add nullable column
Add required column
Alter column to make it nullable
Alter column to make it required
Alter column type
Rename column
Drop column
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Last updated 2025-10-29 UTC.
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