Categories:: Information Schema , Table functions

TAG_REFERENCES_ALL_COLUMNS¶

Returns a table in which each row displays the tag name and tag value assigned to a specific column.

This function returns every tag set on every column in a given table or view, whether the tag is directly assigned to a column or through tag inheritance.

Syntax¶

TAG_REFERENCES_ALL_COLUMNS( '<object_name>' , '<object_domain>' )

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Arguments¶

'object_name'

Name of the referenced object if the tag association is on the object.

This argument supports the names for tables and views.

'object_domain'

Domain of the referenced object.

Snowflake supports one domain for this function: TABLE.

Note that the domain TABLE must be used for all objects that contain columns, even if the object name is a view (i.e. view, materialized view).

Usage notes¶

Results are only returned for a role that has access to the specified object.

To view references for system tags, use a role with IMPORTED PRIVILEGES on the shared SNOWFLAKE database.
When calling an Information Schema table function, the session must have an INFORMATION_SCHEMA schema in use or the function must use the fully-qualified object name. For more details, see Snowflake Information Schema.

Output¶

The function returns the following columns:

Column	Data Type	Description
TAG_DATABASE	TEXT	The database in which the tag is set.
TAG_SCHEMA	TEXT	The schema in which the tag is set.
TAG_NAME	TEXT	The name of the tag. This is the `key` in the `key = 'value'` pair of the tag.
TAG_VALUE	TEXT	The value of the tag. This is the `'value'` in the `key = 'value'` pair of the tag.
APPLY_METHOD	TEXT	Specifies how the tag got assigned to the object. Possible values include the following: `CLASSIFIED`: The tag was automatically applied to a column that was classified as containing sensitive data. See About tag mapping. `INHERITED`: The object inherited the tag from an object higher up in the Snowflake securable object hierarchy. See Tag inheritance. `MANUAL`: Someone manually set the tag on the object using a CREATE <object> or ALTER <object> command. See Set a tag. `PROPAGATED`: The tag was automatically propagated from one object to another. See Automatic tag propagation with user-defined tags. `NULL`: Legacy record. `NONE`: Legacy record.
LEVEL	TEXT	The object domain on which the tag is set.
OBJECT_DATABASE	TEXT	The database name containing the table or view.
OBJECT_SCHEMA	TEXT	The schema name containing the table or view.
OBJECT_NAME	TEXT	The name of the table or view.
DOMAIN	TEXT	This value should be `COLUMN` since this function returns all tags set on all columns in the table or view.
COLUMN_NAME	TEXT	The name of the column that the tag is set on.

Examples¶

Retrieve the list of tags that are assigned to every column in the table my_table:

select *
  from table(my_db.information_schema.tag_references_all_columns('my_table', 'table'));

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