2.18.7 Variable Limitations

• A group_concat_max_len session variable with a value that exceeds the maximum HeatWave column length (65532 bytes).

• The sql_select_limit as a global variable.

  It is only supported as a session variable.

• time_zone and timestamp variable settings are not passed to HeatWave when queries are offloaded. MySQL 8.4.0-u2 removes this limitation.