Description of the illustration local_partitioned_index.gif (on_range_partitioned_table::=,on_list_partitioned_table::=,on_hash_partitioned_table::=,on_comp_partitioned_table::=) on_range_partitioned_table::= Description of the illustration on_range_partitioned_table.gif (segment_attributes_...
Create a partition function that maps the rows of a table or index into partitions based on the values of a specified column. Create a partition scheme that maps the partitions of a partitioned table or index to the new filegroups.
Creates a relational index on a table or view. Also called a rowstore index because it is either a clustered or nonclustered B-tree index. You can create a rowstore index before there is data in the table. Use a rowstore index to improve query performance, especially when the queries ...
{ partition_scheme_name (column_name) | filegroup_name | default } ] [ FILESTREAM_ON { filestream_filegroup_name | partition_scheme_name | "NULL" } ] [ ; ] <object> ::= { [ database_name. [ schema_name ] . | schema_name. ] table_or_view_name } <relational_index_option> ::...
CREATE INDEX IDX ON T(SUBSTR(C,1,4)); index_attributes 支持反向索引 REVERSE 属性。示例如下: CREATE INDEX IDX ON T(C) REVERSE; 支持global_partitioned_index 子句定义 global 索引分区。global_partitioned_index 的语法如下: table_index_clause: [ schema. ] table [ t_alias ] (index_expr [ ...
ONtable-name Identifies the table on which the index is to be created. Thetable-namemust identify a base table (not a view) that exists at the current server. If the table is a partitioned table, an alias may be specified which identifies a single partition. The created index will then...
Creates a relational index on a table or view. Also called a rowstore index because it is either a clustered or nonclustered B-tree index. You can create a rowstore index before there is data in the table. Use a rowstore index to improve query performance, especially when the queries ...
To create an XMLType table in a different database schema from your own, you must have not only privilege CREATE ANY TABLE but also privilege CREATE ANY INDEX. This is because a unique index is created on column OBJECT_ID when you create the table. Column OBJECT_ID stores a system-genera...
Use the CREATE TABLE statement to create partitioned tables and replicated tables in AnalyticDB for MySQL,AnalyticDB:This topic describes how to create partitioned tables and replicated tables by using the CREATE TABLE statement in AnalyticDB for MySQL a
The following figure can help you understand each index used in the execution process and configure appropriate indexes based on your business requirements. In this example, you perform an SQL query on a partitioned table and locate the partition in which the desired data resides by using the ...