2.15.1 Secondary Engine Definitions

To identify tables on the MySQL DB System that are defined with a secondary engine, query the CREATE_OPTIONS column of the INFORMATION_SCHEMA.TABLES table. The CREATE_OPTIONS column shows the SECONDARY_ENGINE clause, if defined. Tables with SECONDARY_ENGINE="RAPID" are loaded into HeatWave, and changes to them are automatically propagated to their counterpart tables in the HeatWave Cluster.

mysql> SELECT TABLE_SCHEMA, TABLE_NAME, CREATE_OPTIONS 
          FROM INFORMATION_SCHEMA.TABLES
          WHERE CREATE_OPTIONS LIKE '%SECONDARY_ENGINE%' AND TABLE_SCHEMA LIKE 'tpch';
+--------------+------------+--------------------------+
| TABLE_SCHEMA | TABLE_NAME | CREATE_OPTIONS           |
+--------------+------------+--------------------------+
| tpch         | customer   | SECONDARY_ENGINE="RAPID" |
| tpch         | lineitem   | SECONDARY_ENGINE="RAPID" |
| tpch         | nation     | SECONDARY_ENGINE="RAPID" |
| tpch         | orders     | SECONDARY_ENGINE="RAPID" |
| tpch         | part       | SECONDARY_ENGINE="RAPID" |
| tpch         | partsupp   | SECONDARY_ENGINE="RAPID" |
| tpch         | region     | SECONDARY_ENGINE="RAPID" |
| tpch         | supplier   | SECONDARY_ENGINE="RAPID" |
+--------------+------------+--------------------------+

You can also view create options for an individual table using SHOW CREATE TABLE.

Note

Before MySQL 8.0.31, it may be necessary to exclude the SECONDARY ENGINE option from CREATE TABLE statements when creating a dump file, as DDL operations cannot be performed on tables defined with a secondary engine in those releases. You can use the show_create_table_skip_secondary_engine variable to exclude the SECONDARY ENGINE clause from SHOW CREATE TABLE output, and from CREATE TABLE statements dumped by the mysqldump utility. mysqldump also provides a --show-create-skip-secondary-engine option that enables the show_create_table_skip_secondary_engine system variable for the duration of the dump operation.