CREATE INDEX IF NOT EXISTS i_index ON integers(i); To Reproduce Now: v0.10.1 4a89d97db8 createtablefoo(barint);createunique indexfoo_bar_uniqueonfoo(bar);createunique indexifnot exists foo_bar_uniqueonfoo(bar); Catalog Error: An index with the name foo_bar_uniquealready exists!
CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [ IF NOT EXISTS ] name ] ON [ ONLY ] table_name [ USING method ] ( { column_name | ( expression ) } [ COLLATE collation ] [ opclass [ ( opclass_parameter = value [, ... ] ) ] ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ...
当发生UNIQUE或PRIMARY KEY约束冲突时，REPLACE算法将在插入或更新当前行之前删除导致约束冲突的预先存在的...
Create database [if not exists] database_name [charset charset_name];其中，if not exists表示如果...
CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [ IF NOT EXISTS ] name ] ON [ ONLY ] table_name [ USING method ] ( { column_name | ( expression ) } [ COLLATE collation ] [ opclass [ ( opclass_parameter = value [, ... ] ) ] ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ...
执行CREATE INDEX语句创建索引需要当前用户至少拥有对应对象的 INDEX 权限。有关 OceanBase 数据库权限的详细介绍,请参见MySQL 模式下的权限分类。 语法 CREATE[hint_options][SPATIAL|UNIQUE]INDEX[IFNOTEXISTS]index_name[USINGBTREE]ONtable_name(sort_column_key[,sort_column_key...])[index_option...][partiti...
CREATE [ UNIQUE ] [ index-type ] INDEX [ IF NOT EXISTS ] <index-name> …ON [ <owner>.] … ( <column-name> [ , <column-name> ] …) …[ { IN | ON } <dbspace-name> ] …[ NOTIFY <integer> ] …[ DELIMITED BY '<separators-string>‘ ] …[ LIMIT <maxwordsize-integer...
When you create a unique index, you can set an option to ignore duplicate keys. If this option is set to Yes and you attempt to create duplicate keys by adding data that affects multiple rows (with the INSERT statement), the row containing a duplicate is not added. If it is set to ...
When you create a unique index, you can set an option to ignore duplicate keys. If this option is set to Yes and you attempt to create duplicate keys by adding data that affects multiple rows (with the INSERT statement), the row containing a duplicate is not added. If it is set to ...
执行CREATE INDEX语句创建索引需要当前用户至少拥有对应对象的 INDEX 权限。有关 OceanBase 数据库权限的详细介绍,请参见MySQL 模式下的权限分类。 语法 CREATE[hint_options][SPATIAL|UNIQUE]INDEX[IFNOTEXISTS]index_name[USINGBTREE]ONtable_name(sort_column_key[,sort_column_key...])[index_option...][partiti...