因为Alter Table 重新添加自增列属性的时候,由于一个内核的缺陷,并没有 reset __all_auto_increment 表,导致此表的值被复用。Insert 数据的时候会校验 table schema 的 truncate version 和自增列的 truncate version。如果 table schema 的 truncate_version 比自增列 __all_auto_increment 表的truncate_version...
table_optionssignifies table options of the kind that can be used in theCREATE TABLEstatement, such asENGINE,AUTO_INCREMENT,AVG_ROW_LENGTH,MAX_ROWS,ROW_FORMAT, orTABLESPACE. For descriptions of all table options, seeSection 13.1.18, “CREATE TABLE Statement”. However,ALTER TABLEignoresDATA DIREC...
修改表的一个或多个存储参数。当table_name为索引名时,ACTIVE_PAGES表示索引的页面数量,可能比实际的物理文件页面少,可以用于优化器调优。目前只对Ustore的分区表local索引生效,且会被vacuum、analyze更新(包括 auto vacuum)。不建议用户手动设置该参数。
To reset the current auto-increment value: ALTER TABLE t1 AUTO_INCREMENT = 13; You cannot reset the counter to a value less than or equal to the value that is currently in use. For both InnoDB and MyISAM, if the value is less than or equal to the maximum value currently in the AU...
int); prepare stmt from "alter table t1 auto_increment=100"; execute stmt; show create table t1; # Let us trash table-cache's mem flush tables; select * from t2; execute stmt; # Oops we have some trash in the comment show create table t1; deallocate prepare stmt; drop table t1, ...
Description:If I create a table with an explicit AUTO_INCREMENT value, and then add a foreign key via an ALTER stmt, the AUTO_INCREMENT is reset to 1! Other ALTER stmts untested.How to repeat:CREATE TABLE `foo` ( `id` int(10) unsigned NOT NULL auto_increment, `title` varchar(128) ...
ALTER TABLE is used to modify tables, including modifying table definitions, renaming tables, renaming specified columns in tables, renaming table constraints, setting ta
默认设置为 AUTO。 PROJECTIONS 将新列添加到此表的一个或多个现有投影中,指定为投影基本名称的逗号分隔列表。Vertica 将该列添加到每个投影的所有伙伴实例。投影列表不能包含具有预聚合数据的投影,例如实时聚合投影;否则,Vertica 将回退 ALTER TABLE 语句。 ALL PROJECTIONS 将该列添加到此表的所有投影(不包括具有预...
关于数据库的alter table操作和索引概念 //设置已存在表中字段为auto_incrementALTER TABLE tablename change id id int(2) not null auto_increment;//添加字段并设置主键ALTER TABLE tabelname ADD new_field_id int(5) unsigned default 0 not null auto_increment ,ADD primary key (new_field_id);//...
1 id int(11) AUTO_INCREMENT 2 time timestamp NOW(), on update NOW() Then comes TRIGGER Introduce a trigger that runs whenever there is an update toTriggerTable. CREATE TRIGGER `TriggerTableOnUpdate` AFTER UPDATE ON `TriggerTable`