| <?xml version="1.0" encoding="UTF-8"?> |
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| <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
| <concept rev="2.0.0" id="grant"> |
| |
| <title>GRANT Statement (<keyword keyref="impala20"/> or higher only)</title> |
| |
| <titlealts audience="PDF"> |
| |
| <navtitle>GRANT</navtitle> |
| |
| </titlealts> |
| |
| <prolog> |
| <metadata> |
| <data name="Category" value="Impala"/> |
| <data name="Category" value="DDL"/> |
| <data name="Category" value="SQL"/> |
| <data name="Category" value="Security"/> |
| <data name="Category" value="Sentry"/> |
| <data name="Category" value="Roles"/> |
| <data name="Category" value="Administrators"/> |
| <data name="Category" value="Developers"/> |
| <data name="Category" value="Data Analysts"/> |
| <!-- Consider whether to go deeper into categories like Security for the Sentry-related statements. --> |
| </metadata> |
| </prolog> |
| |
| <conbody> |
| |
| <p rev="2.0.0"> |
| The <codeph>GRANT</codeph> statement grants a privilege on a specified object to a role, |
| to a user, or to a group. The statement is also used to grant a role to a group. |
| </p> |
| |
| <p conref="../shared/impala_common.xml#common/syntax_blurb"/> |
| |
| <p> |
| The following syntax are supported in Impala through Ranger to manage authorization. |
| </p> |
| |
| <p><b><codeph>GRANT ROLE TO GROUP</codeph></b></p> |
| <p> |
| For <codeph>GRANT ROLE TO GROUP</codeph>, only Ranger administrative users can grant roles to a group. |
| </p> |
| <codeblock>GRANT ROLE <varname>role_name</varname> TO GROUP <varname>group_name</varname></codeblock> |
| |
| <p><b><codeph>GRANT privilege ON object TO PRINCIPAL</codeph></b></p> |
| <p> |
| For GRANT privilege ON object TO principal (a user, a group, or a role), Ranger |
| administrative users can use this statement. If the privilege is granted with the clause of |
| WITH GRANT OPTION, the grantee (the user, the users belonging to the group, or the users |
| belonging to the group granted the role) is able to grant the privilege to other principals. |
| </p> |
| <codeblock>GRANT <varname>privilege</varname> ON <varname>object_type</varname> <varname>object_name</varname> |
| TO USER <varname>user_name</varname> |
| GRANT <varname>privilege</varname> ON <varname>object_type</varname> <varname>object_name</varname> |
| TO GROUP <varname>group_name</varname> |
| GRANT <varname>privilege</varname> ON <varname>object_type</varname> <varname>object_name</varname> |
| TO ROLE <varname>role_name</varname> |
| |
| <ph rev="3.0">privilege ::= ALL | ALTER | CREATE | DROP | INSERT | REFRESH | SELECT | SELECT(<varname>column_name</varname>)</ph> |
| <ph rev="3.0">object_type ::= SERVER | URI | DATABASE | TABLE</ph></codeblock> |
| |
| <p> |
| Typically, the <codeph><varname>object_name</varname></codeph> is an identifier. For URIs, |
| it is a string literal. |
| </p> |
| |
| <p conref="../shared/impala_common.xml#common/privileges_blurb"/> |
| |
| <p> |
| Only administrative users for Ranger can use this statement. |
| </p> |
| |
| <p> |
| Only Ranger administrative users can grant roles to a group. |
| </p> |
| |
| <p> |
| The <codeph>WITH GRANT OPTION</codeph> clause allows members of the specified role to issue |
| <codeph>GRANT</codeph> and <codeph>REVOKE</codeph> statements for those same privileges. |
| Hence, if a role has the <codeph>ALL</codeph> privilege on a database and the <codeph>WITH |
| GRANT OPTION</codeph> set, users granted that role can execute |
| <codeph>GRANT</codeph>/<codeph>REVOKE</codeph> statements only for that database or child |
| tables of the database. This means a user could revoke the privileges of the user that |
| provided them the <codeph>GRANT OPTION</codeph>. |
| </p> |
| |
| <p rev="2.3.0 collevelauth"> |
| The ability to grant or revoke <codeph>SELECT</codeph> privilege on specific columns is |
| available in <keyword keyref="impala23_full"/> and higher. See |
| <xref |
| keyref="sg_hive_sql"/> for details. |
| </p> |
| |
| <p> |
| <b>Usage notes:</b> |
| </p> |
| |
| <p> |
| You can only grant the <codeph>ALL</codeph> privilege to the <codeph>URI</codeph> object. |
| Finer-grained privileges mentioned below on a <codeph>URI</codeph> are not supported. |
| </p> |
| |
| <p conref="../shared/impala_common.xml#common/privileges_objects"/> |
| |
| <p conref="../shared/impala_common.xml#common/compatibility_blurb"/> |
| |
| <p> |
| <ul> |
| <li> |
| The Impala <codeph>GRANT</codeph> and <codeph>REVOKE</codeph> statements are available |
| in <keyword keyref="impala20_full"/> and later. |
| </li> |
| |
| <li> |
| In general, Impala can make use of any roles and privileges specified by the |
| <codeph>GRANT</codeph> and <codeph>REVOKE</codeph> statements in Hive, when your system |
| is configured to use the Ranger service instead of the file-based policy mechanism. |
| </li> |
| |
| <li conref="../shared/impala_common.xml#common/grant_revoke_single"/> |
| </ul> |
| </p> |
| |
| <p conref="../shared/impala_common.xml#common/cancel_blurb_no"/> |
| |
| <p conref="../shared/impala_common.xml#common/permissions_blurb_no"/> |
| |
| <p conref="../shared/impala_common.xml#common/kudu_blurb"/> |
| |
| <p conref="../shared/impala_common.xml#common/kudu_sentry_limitations"/> |
| |
| <p conref="../shared/impala_common.xml#common/related_info"/> |
| |
| <p> |
| <xref href="impala_authorization.xml#authorization"/>, |
| <xref href="impala_revoke.xml#revoke"/>, |
| <xref href="impala_create_role.xml#create_role"/>, |
| <xref href="impala_drop_role.xml#drop_role"/>, <xref href="impala_show.xml#show"/> |
| </p> |
| |
| </conbody> |
| |
| </concept> |