未知类型 72

[vipty]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

environment

• canal version
  *1.1.8
• mysql version
• polardb 8.0.2.2.27.1

Issue Description

Caused by: java.lang.IllegalArgumentException: unknow type : 72 table : center.tmp_task [{"array":false,"charset":0,"geoType":0,"meta":0,"nullable":false,"pk":false,"type":3,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":0,"nullable":false,"pk":false,"type":1,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":0,"nullable":false,"pk":false,"type":8,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":4,"nullable":false,"pk":false,"type":245,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":0,"nullable":false,"pk":false,"type":18,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":0,"nullable":false,"pk":false,"type":18,"unsigned":false,"visibility":false},{"array":false,"charset":0,"geoType":0,"meta":256,"nullable":false,"pk":false,"type":20,"unsigned":false,"visibility":false}]

Steps to reproduce

CREATE TABLE tmp_task (
plan_time int NOT NULL COMMENT '任务发送时间(以分钟为单位,秒为0)',
task_type tinyint NOT NULL COMMENT '业务类型 ',
index_id bigint NOT NULL DEFAULT '0' COMMENT '状态 0:可写入 其它: 不可写入',
json_data json DEFAULT NULL COMMENT '{"$uk":{"uk":"$uk"}}',
created_at datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
updated_at datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
PRIMARY KEY (plan_time,task_type,index_id) USING BTREE,
UNIQUE KEY platform_task_uk ((cast(json_extract(json_data,_utf8mb4'$.*.uk') as char(64) array)),task_type) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='任务调度表'
;

Expected behaviour

Actual behaviour

If there is an exception, please attach the exception trace:

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