Oracle教程 2023-03-28

Oracle 视图 ALL_HIERARCHIES 官方解释，作用，如何使用详细说明

本视图ALL_HIERARCHIES用于提供所有分层模式的详细信息，包括它们的类型、层级，以及是否启用落地检查。

使用方法:

1、查询全部的分层模式的详细信息：
SELECT * FROM all_hierarchies;

2、按照分层模式名称hierarchy_name查询关于特殊分层模式的详细信息：
SELECT * FROM all_hierarchies WHERE hierarchy_name = ‘My_Hierarchy’;

3、查询特定分层模式有几层：
SELECT count(level_name) FROM all_hierarchies WHERE hierarchy_name = ‘My_Hierarchy’;

ALL_HIERARCHIES describes the hierarchies accessible to the current user.

Related Views

DBA_HIERARCHIES describes all hierarchies in the database.
USER_HIERARCHIES describes the hierarchies owned by the current user. This view does not display the OWNER column.

Column	Datatype	NULL	Description
`OWNER`	`VARCHAR2(128)`	`NOT NULL`	Owner of the hierarchy
`HIER_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the hierarchy
`DIMENSION_OWNER`	`VARCHAR2(128)`	`NOT NULL`	Owner of the attribute dimension used by the hierarchy
`DIMENSION_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the attribute dimension used by the hierarchy
`PARENT_ATTR`	`VARCHAR2`		The value of this column is always NULL
`COMPILE_STATE`	`VARCHAR2(7)`		Compile status of the hierarchy: `VALID` `INVALID`
`ORIGIN_CON_ID`	`NUMBER`		The ID of the container where the data originates. Possible values include: `0`: This value is used for rows in non-CDBs. This value is not used for CDBs. n: This value is used for rows containing data that originate in the container with container ID n (n = 1 if the row originates in root).