table cf colperm delete

Deletes the Access Control Expressions (ACEs) for a specified column. Deletion cannot be undone.

Note: When a user, group, or role requests to read data from, write data to, or append data to a column, MapR-DB checks whether that user, group, or role has read or write permission for the column family AND read or write permission for the column. For example, suppose user i_montoya tries to write data to columns col1 and col2 in column family cf1. MapR-DB checks whether i_montoya has write permission on cf1 AND col1 AND col2. If i_montoya does not have all three permissions, MapR-DB returns an error that says access for the write is denied.

If this user were to try to read from the same two columns, MapR-DB would simply not return the data. If the user tried to read from those two columns and additional columns on which he had read permissions, the results would contain the data for those additional columns but exclude the data for col1 and col2.

Syntax

CLI

maprcli table cf colperm delete
    -path <path>
    -cfname <column-family name>
    -name <column name>

REST

http[s]://<host>:<port>/rest/table/cf/colperm/delete?path=<path>&cfname=<name>&name=<name>

Note: The mapr user is not treated as a superuser. MapR-DB does not allow the mapr user to run this command unless that user is given the relevant permission or permissions with access-control expressions.

Parameters

Parameter

Description

path

The path to the table.

  • For a path on the local cluster, start the path at the volume mount point. For example, for a table named test under volume1 which has a mount point at /volume1, specify the following path: /volume1/test
  • For a path on a remote cluster, you must also specify the cluster name in the path. For example, for a table named test under volume1 in the sanfrancisco cluster, specify the following path:/mapr/sanfrancisco/volume1/customer

cfname

The name of the column family in which the column is located.

name The name of the column that you want to delete the ACEs for.

Examples

Deleting ACEs for a column
CLI

maprcli table cf colperm delete -path /mytable -cfname cf1 -name col1

REST

https://r1n1.sj.us:8443/rest/table/cf/delete?path=%2Fvolume1%2Fthetable&cfname=mycf&name=col1