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This page describes how to configure change data capture (CDC) to
stream data from a self-managed MySQL database to a supported destination,
such as BigQuery or Cloud Storage.
These instructions also work for databases such as MariaDB, Percona Server for
MySQL or Alibaba Cloud PolarDB.
Verify the configuration and retention period of the binary log
Confirm that the binary log is configured correctly by entering the following MySQL command:
SHOWGLOBALVARIABLESLIKE'%binlog_format%';
Verify that the value for the binlog_format variable is set to ROW.
Datastream doesn't support MIXED or STATEMENT binary log
formats.
Confirm that the row format for the binary log is set to FULL by entering
the following MySQL command:
SHOWGLOBALVARIABLESLIKE'binlog_row_image';
Verify that the replica updates option for the binary log is set to ON by
entering the following MySQL command:
SHOWGLOBALVARIABLESLIKE'log_replica_updates';
For MySQL versions earlier than 8.0.26, enter the following command instead:
SHOWGLOBALVARIABLESLIKE'log_slave_updates';
Verify that the retention period of the binary log is set to 604800
seconds (7 days) by entering the following MySQL command:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-16 UTC."],[],[],null,[]]