`sync_char`char(32)DEFAULTNULLCOMMENT'char类型', `sync_bytea` blob COMMENT'bytea类型',PRIMARYKEY(`id`) ) ENGINE=InnoDBDEFAULTCHARSET=utf8mb4 上述代码执行报错:1067 - Invalid default value for 'create_timestamp' 应改成 `create_timestamp`timestampNULLDEFAULTNULLCOMMENT'时间(timestamp)',
CREATETABLE`helei`(`id`int(10)UNSIGNEDNOTNULLAUTO_INCREMENT,`t1`timestampNULLDEFAULTNULLCOMMENT'null',`t2`timestampNOTNULLCOMMENT'not null',`t3`timestampNOTNULLONUPDATECURRENT_TIMESTAMPCOMMENT'not null update',PRIMARYKEY(`id`)); insert into helei(t1,t2,t3) values(null,null,null); mysql> ...
mysql> insert into helei values(NULL); ERROR 1048 (23000): Column 'a' cannot be null explicit_defaults_for_timestamp = 0 1 2 3 4 5 6 7 8 CREATETABLE `helei` ( `id`int(10) UNSIGNEDNOTNULLAUTO_INCREMENT , `t1`timestampNULLDEFAULTNULLCOMMENT'null', `t2`timestampNOTNULLCOMMENT'not ...
`create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', `update_time` timestamp NULL DEFAULT NULL COMMENT '更新时间', 1. 2. 3. 可以看到 create_time 列的属性是 not null ,按照惯性思维想,此列不应该插入 null ,为何之前的环境是没有问题的呢?经检查参数发现问题出在 expli...
`create` TIMESTAMP(3) NULL DEFAULT NULL, `create2` DATETIME(3) DEFAULT NULL ) ENGINE=INNODB DEFAULT CHARSET=utf8 SELECT * FROM tab1; 1. 2. 3. 4. 5. 6. 7. TIMESTAMP(3)与 DATETIME(3)意思是保留3位毫秒数 TIMESTAMP(6)与 DATETIME(6)意思是保留6位毫秒数 ...
`create` TIMESTAMP(3) NULL DEFAULT NULL, `create2` DATETIME(3) DEFAULT NULL ) ENGINE=INNODB DEFAULT CHARSET=utf8 SELECT * FROM tab1; TIMESTAMP(3)与 DATETIME(3)意思是保留3位毫秒数 TIMESTAMP(6)与 DATETIME(6)意思是保留6位毫秒数
mysql> insert into helei values(NULL); ERROR 1048 (23000): Column 'a' cannot be null explicit_defaults_for_timestamp = 0 CREATETABLE`helei`(`id`int(10)UNSIGNEDNOTNULLAUTO_INCREMENT,`t1`timestampNULLDEFAULTNULLCOMMENT'null',`t2`timestampNOTNULLCOMMENT'not null',`t3`timestampNOTNULLONUPDATE...
业务报错”Column ‘create_time’ cannot be null”,该列不能插入 null 值,查看一下表结构: #只展示部分时间相关列 `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', `update_time` timestamp NULL DEFAULT NULL COMMENT '更新时间', 可以看到 create_time 列的属性是 not ...
该表里面有start_time、acual_start_time、end_time ,updatetime 4个timestamp类型,都是默认创建的,最后MySql解析的结果,却只给start_time加上了 default_current_timestamp on update current_timestamp。和DBA交流过,估摸着应该是MySql内核的bug。 解决办法其实很简单,指定一个默认值就OK了:NOT NULL DEFAULT '...
CREATE TABLE `time_test` ( `id` bigint unsigned, `time_stamp` timestamp, `date_time` datetime, `create_timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', `create_datetime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', PRIMARY KEY (`id`)) ...