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GRANT PRIVILEGE TO ROLE grants an additional privilege or inherited role to an existing role in the current database.
This is equivalent to the grantPrivilegesToRole command (http://docs.mongodb.org/manual/reference/command/grantPrivilegesToRole/)
Example
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GRANT PRIVILEGE DB mydatabase COLLECTION mycollection ACTIONS "find" TO ROLE comrole |
Example
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GRANT PRIVILEGE DB sports COLLECTION test ACTIONS "find", "insert", "remove", "update" TO ROLE all_baseball_role |
Example
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GRANT PRIVILEGE DB "admin" COLLECTION "baseball" Actions "createCollection","createIndex","createRole","createUser","dropCollection"
TO ROLE "test_deployment" |
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GRANT ROLE TO ROLE
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GRANT ROLE TO ROLE grants an additional role or inherited role to an existing role in the current database.
This is equivalent to the grantRolesToRole command (http://docs.mongodb.org/manual/reference/command/grantRolesToRole/)
Example
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GRANT ROLE newrole DB mydatabase TO ROLE comrole |
REVOKE PRIVILEGE FROM ROLE
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REVOKE PRIVILEGE FROM ROLE revokes a privilege or inherited role from an existing role in the current database.
This is equivalent to the revokePrivilegesFromRole command (http://docs.mongodb.org/manual/reference/command/revokePrivilegesFromRole/)
Example
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REVOKE PRIVILEGE DB mydatabase COLLECTION mycollection ACTIONS "find" FROM ROLE comrole |
Example
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REVOKE PRIVILEGE DB sports COLLECTION test ACTIONS "insert", "remove", "update" FROM ROLE all_baseball_role |
Example
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REVOKE PRIVILEGE DB "user" COLLECTION "user" ACTIONS "dropCollection","dropRole","dropUser","emptycapped","enableProfiler"
FROM ROLE "test_deployment" |
REVOKE ROLE FROM ROLE
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REVOKE ROLE FROM ROLE revokes a role or inherited role from an existing role in the current database.
This is equivalent to the revokeRolesFromRole command (http://docs.mongodb.org/manual/reference/command/revokeRolesFromRole/)
Example
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REVOKE ROLE newrole DB mydatabase FROM ROLE comrole |
Supported Functions
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SUM
Sums the values.
Example
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SELECT city, SUM(pop) FROM zips GROUP BY city |
Arithmetic and Mathematical Functions
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Multiplies one or more numbers and returns their product.
Example
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SELECT itemID + prodID
FROM products
WHERE dodad='whirlygig4' |
Operators from the Aggregation Framework have some limitations. For example, given the baseball collection containing documents like:
{ "teamName" : "Cardinals",
"city" : "St. Louis",
"division" : "NL Central",
"ranking" : 1,
"managerName" : { "first" : "Mike", "last" : "Matheny" },
"colors" : [ "red", "white" ],
"worldChampionships" : 11,
"stats" : [ { "year" : 2010, "wins" : 86, "losses" : 76, "winPercentage" : 0.531 },
{ "year" : 2011, "wins" : 90, "losses" : 72, "winPercentage" : 0.556 },
{ "year" : 2012, "wins" : 88, "losses" : 74, "winPercentage" : 0.543 }
]
}
The query:
SELECT stats.wins + stats.losses FROM baseball
will translate to
db.baseball.aggregate({$project: { "sum": { $add: ["$stats.wins", "$stats.losses"] } } })
which will throw an exception:
"exception: Exception occurred during aggregation: exception: can't convert from BSON type Array to double "
as the aggregation operator cannot work inside arrays.
Bit Functions
Bit Functions perform bit manipulations between two expressions of any of the integer data type.
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