云数据库 GAUSSDB-CREATE INDEX:语法格式

时间：2024-11-02 18:48:27

云数据库 GAUSSDB

语法格式

在表上创建索引。

    
         CREATE [ UNIQUE ] INDEX [ CONCURRENTLY ] [ [schemaname.]index_name ] ON table_name [ USING method ]
    ({ { column_name | ( expression ) } [ COLLATE collation ] [ opclass ] [ ASC | DESC ] [ NULLS { FIRST | LAST } ] }[, ...] )
    [ WITH ( {storage_parameter = value} [, ... ] ) ]
    [ TABLESPACE tablespace_name ]
    [ WHERE predicate ];

在分区表上创建索引。

    
         CREATE [ UNIQUE ] INDEX [ [schemaname.]index_name ] ON table_name [ USING method ]
    ( { { column_name | ( expression ) } [ COLLATE collation ] [ opclass ] [ ASC | DESC ] [ NULLS LAST ] } [, ...] )
    [ LOCAL [ ( { PARTITION index_partition_name [ TABLESPACE index_partition_tablespace ] } [, ...] ) ] | GLOBAL ]
    [ WITH ( { storage_parameter = value } [, ...] ) ]
    [ TABLESPACE tablespace_name ]
    [ WHERE predicate ];