Oracle教程 2023-02-23

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

本站中文解释

ALL_HIER_COLUMNS_AE视图显示给定模式中的所有层次结构列，包括正斜线、顺序号及其多个层次结构属性。

用法：
SELECT column_name,spare1,spare2 …
FROM all_hier_columns_ae
WHERE owner = 模式名;

官方英文解释

ALL_HIER_COLUMNS_AE describes the columns of the hierarchies (across all editions) accessible to the current user.

Related Views

DBA_HIER_COLUMNS_AE describes the columns of all hierarchies (across all editions) in the database.
USER_HIER_COLUMNS_AE describes the columns of the hierarchies (across all editions) 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
`COLUMN_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the column
`ROLE`	`VARCHAR2(4)`		The role the attribute plays in the hierarchy: `KEY` `AKEY` `HIER` `PROP`
`DATA_TYPE`	`VARCHAR2(106)`		Datatype of the column
`DATA_LENGTH`	`NUMBER`	`NOT NULL`	Length of the column (in bytes)
`DATA_PRECISION`	`NUMBER`		Decimal precision for the `NUMBER` datatype; binary precision for the `FLOAT` datatype, NULL for all other datatypes
`DATA_SCALE`	`NUMBER`		Number of digits to the right of the decimal point in a number
`NULLABLE`	`CHAR(1)`		Indicates whether a column allows NULL values; the value is `N` if there is a `NOT` `NULL` constraint on the column or if the column is part of a `PRIMARY` `KEY`
`CHARACTER_SET_NAME`	`VARCHAR2(44)`		Name of the character set: `CHAR_CS` `NCHAR_CS`
`CHAR_COL_DECL_LENGTH`	`NUMBER`		Declaration length of the character type column
`CHAR_USED`	`VARCHAR2(1)`		Indicates that the column uses `BYTE` length semantics (`B`) or `CHAR` length semantics (`C`), or whether the datatype is not any of the following (NULL): `CHAR` `VARCHAR2` `NCHAR` `NVARCHAR2`
`ORDER_NUM`	`NUMBER`	`NOT NULL`	Order of the column, with attributes first in the order specified in the definition of the hierarchy followed by hierarchical attributes
`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).
`EDITION_NAME`	`VARCHAR2(128)`		Name of the application edition where the hierarchy is defined

Note:

This view is available starting with Oracle Database release 21c, version 21.5.

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官方英文解释

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