1. Database Reference
  2. Static Data Dictionary Views
  3. Static Data Dictionary Views: ALL_ALL_TABLES to ALL_OUTLINES
  4. ALL_JSON_COLUMNS

2.198 ALL_JSON_COLUMNS

ALL_JSON_COLUMNS provides information on the JavaScript Object Notation (JSON) columns accessible to the current user. Each column that has an IS JSON check constraint in an AND condition and is accessible to the user appears in this view. This view enables a user to find all the JSON columns that are accessible to him or her.

For example, if a check constraint combines the IS JSON condition with another condition using logical condition OR, then the column is not listed in this view. In this case, it is not certain that the data in the column is JSON data. For example, the following constraint does not ensure that the data in column jcol is JSON data:

jcol is json OR length(jcol) < 1000

Related Views

  • DBA_JSON_COLUMNS provides information on all JSON columns.

  • USER_JSON_COLUMNS provides information on the JSON columns for which the user is the owner. This view does not display the OWNER column.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

Owner of the table with the JSON column

TABLE_NAME

VARCHAR2(128)

Name of the table with the JSON column

OBJECT_TYPE

VARCHAR2(5)

Object type:

  • TABLE

  • VIEW

COLUMN_NAME

VARCHAR2(128)

Name of the JSON column

FORMAT

VARCHAR2(9)

Format of the JSON data

DATA_TYPE

VARCHAR2(13)

Data type of the JSON column

See Also: