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sql报错非法的字符校对Illegal mix of collations

article 2025/3/1 0:22:33

0.报错sql如下(查询单个表都没问题,关联就会报错):
SELECT
A.ID
,A.NAME
,A.SCH_TYPE
,A.CYCLE
,B.ID ISREPLY
,A.UPDATE_TIME
,A.DESCR
,A.CATEGORY_ID
,D.PARAM_NAME as fLOW_TYPE
FROM DMGR_FLOW A
LEFT JOIN DMGR_PARAM D ON A.FLOW_TYPE = D.PARAM_VALUE
;
Illegal mix of collations

1.查看建表语句,发现字符集不一样
一个是:CHARSET = utf8mb4 COLLATE = utf8mb4_unicode_ci
另一个是:CHARSET = utf8mb4

CREATE TABLE dmgr_flow (
ID decimal(18,0) NOT NULL,
NAME varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT ‘作业流名称’,
CRON_EXPRESSION varchar(100) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘执行时间’,
SCH_TYPE varchar(2) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘调度类型’,
CYCLE varchar(2) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘调度周期’,
OWNER decimal(18,0) DEFAULT NULL COMMENT ‘创建人’,
CATEGORY_ID decimal(18,0) DEFAULT NULL COMMENT ‘分类id’,
DESCR varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘描述’,
ACTIVE_TIME datetime DEFAULT NULL COMMENT ‘生效时间’,
INACTIVE_TIME datetime DEFAULT NULL COMMENT ‘失效时间’,
CREATE_TIME datetime NOT NULL COMMENT ‘创建时间’,
UPDATE_TIME datetime NOT NULL COMMENT ‘更新时间’,
FLOW_TYPE varchar(12) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘作业流类型’,
STATUS varchar(2) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT ‘状态’,
CLAIM_ID decimal(65,0) DEFAULT NULL COMMENT ‘报警主键’,
UPDATE_USER decimal(18,0) DEFAULT NULL COMMENT ‘修改人id’,
PROJECT_ID decimal(18,0) DEFAULT NULL COMMENT ‘项目id’,
PRIMARY KEY (ID),
KEY CATEGORY_FLOW_FK (CATEGORY_ID) BLOCK_SIZE 16384 GLOBAL
) DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_unicode_ci ROW_FORMAT = DYNAMIC COMPRESSION = ‘zstd_1.3.8’ REPLICA_NUM = 3 BLOCK_SIZE = 16384 USE_BLOOM_FILTER = FALSE TABLET_SIZE = 134217728 PCTFREE = 0 COMMENT = ‘作业流’;

CREATE TABLE dmgr_param (
id int(11) NOT NULL AUTO_INCREMENT COMMENT ‘主键自增’,
param_type char(32) DEFAULT NULL COMMENT ‘参数类型’,
param_name char(32) DEFAULT NULL COMMENT ‘参数名称’,
param_value char(32) DEFAULT NULL COMMENT ‘参数值’,
content char(64) DEFAULT NULL COMMENT ‘参数内容’,
operation_user char(32) DEFAULT NULL COMMENT ‘用户’,
create_time datetime DEFAULT NULL,
update_time datetime DEFAULT NULL,
PRIMARY KEY (id),
UNIQUE KEY param_type (param_type, param_name) BLOCK_SIZE 16384 GLOBAL
) AUTO_INCREMENT = 1000182 DEFAULT CHARSET = utf8mb4 ROW_FORMAT = DYNAMIC COMPRESSION = ‘zstd_1.3.8’ REPLICA_NUM = 3 BLOCK_SIZE = 16384 USE_BLOOM_FILTER = FALSE TABLET_SIZE = 134217728 PCTFREE = 0 COMMENT = ‘参数表’;