Re: Add index for mysql table with ndbcluster storage engine 856 urgen sherpa June 10, 2016 05:40AM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle an...
与Copy Table方式相比,Online Add Index采用的是Inplace方式,无需Copy Table,减少了空间开销;与此同时,Online Add Index只有在重放Row Log最后一个Block时锁表,减少了锁表的时间。 与Inplace方式相比,Online Add Index吸收了Inplace方式的优势,却减少了锁表的时间。 Inplace add Index 本章节,主要通过测试/源码跟...
---TABLE_SCHEMA 库名;TABLE 表名 ---AND UPPER(INDEX_NAME) != 'PRIMARY' 只查询索引,不需要主键 SELECTCONCAT('ALTER TABLE `',TABLE_NAME,'` ', 'ADD ', IF(NON_UNIQUE = 1, CASE UPPER(INDEX_TYPE) WHEN 'FULLTEXT' THEN 'FULLTEXT INDEX' WHEN 'SPATIAL' THEN 'SPATIAL INDEX' ELSE CONCA...
mysql 添加索引,ALTER TABLE和CREATE INDEX的区别,nvicat-->mysql表设计-->创建索引.nvicat-->mysql表设计-->创建索引.(1)使用ALTERTABLE语句创建索引,其中包括普通索引、UNIQUE索引和PRIMARYKEY索引3种创建索引的格式:PRIMARYKEY 主键索引:mysql>ALTERTABL
alter table `config` add index idx_config_name(`name`); 1. * 删除索引 alter table `config` drop index idx_config_name; 1. * explain 查看是否使用到了索引 insert into config(name, value, info) values('SMS_ENABLED', '0', '0表示禁用发短信功能, 1表示启用发短信功能'); ...
ALTER TABLE t1 ADD INDEX ((col1 * 40)); Terminology Key part: An index/key consists of one or more key parts. For instance, "CREATE INDEX idx1 ON t1 (col1, col2);" creates one index with two key parts. The key part is a reference to a column in the table, and for STRING/...
} else if (index->table->has_instant_cols()) { // 到这里说明record 上面 没有row_version DD 和 instant add 标记, 但是这个index 上面有instant add 标记 // 说明这个record 是instant add 之前就插入的 rec_insert_state = INSERTED_BEFORE_INSTANT_ADD_OLD_IMPLEMENTATION; ...
{// 到这里说明record 上面没有row_version DD 标记, 只有instant add 标记// 说明这个Record 是Instant add 之后插入的record, 并且没有做过row_version DDut_ad(index->table->has_instant_cols());rec_insert_state=INSERTED_AFTER_INSTANT_ADD_OLD_IMPLEMENTATION;}elseif(index->table->has_instant_cols...
MySQL9.3.0 Source Code Documentation PT_alter_table_add_partition_num Class Referencefinal Parse tree nodes»Nodes representing SQL statements»ALTER TABLE statement Node for theALTER TABLE ADD PARTITION PARTITIONS (<n>@)statement.More...
I am having trouble while adding index on mysql table with ndbcluster storage engine below is the error . [mysqlcluster ver. 7.4 GA] mysql> alter table `sks_staff_office` add index `pid_index` (pid); ERROR 1296 (HY000): Got error 156 'Unknown error code' from NDBCLUSTER ...