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To enable MySQL replication operations to act on individual replication channels, use theFOR CHANNELchannel clause with the following replication statements:

TheSOURCE_POS_WAIT() function has achannel parameter.

START REPLICA andSTOP REPLICAare disallowed for thegroup_replication_recovery andgroup_replication_applier channels.SHOW REPLICA STATUS is also not allowed with thegroup_replication_applier channel.

FLUSH RELAY LOGS is allowed for thegroup_replication_applier channel, but if the request is received while a transaction is being applied, the request is not performed until after the transaction ends. The requester must wait while the transaction is completed and the rotation takes place. This prevents transactions from being split, which is not allowed for Group Replication.