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grant.go
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grant.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// Author: Marc Berhault (marc@cockroachlabs.com)
package sql
import (
"github.com/cockroachdb/cockroach/roachpb"
"github.com/cockroachdb/cockroach/sql/parser"
"github.com/cockroachdb/cockroach/sql/privilege"
)
func (p *planner) changePrivileges(
targets parser.TargetList,
grantees parser.NameList,
changePrivilege func(*PrivilegeDescriptor, string),
) (planNode, *roachpb.Error) {
descriptors, err := p.getDescriptorsFromTargetList(targets)
if err != nil {
return nil, err
}
for _, descriptor := range descriptors {
if err := p.checkPrivilege(descriptor, privilege.GRANT); err != nil {
return nil, roachpb.NewError(err)
}
privileges := descriptor.GetPrivileges()
for _, grantee := range grantees {
changePrivilege(privileges, grantee)
}
if err := descriptor.Validate(); err != nil {
return nil, roachpb.NewError(err)
}
tableDesc, updatingTable := descriptor.(*TableDescriptor)
if updatingTable {
tableDesc.UpVersion = true
p.notifySchemaChange(tableDesc.ID, invalidMutationID)
}
}
// Now update the descriptors transactionally.
b := p.txn.NewBatch()
for _, descriptor := range descriptors {
descKey := MakeDescMetadataKey(descriptor.GetID())
b.Put(descKey, wrapDescriptor(descriptor))
}
if pErr := p.txn.Run(b); pErr != nil {
return nil, pErr
}
return &emptyNode{}, nil
}
// Grant adds privileges to users.
// Current status:
// - Target: single database or table.
// TODO(marc): open questions:
// - should we have root always allowed and not present in the permissions list?
// - should we make users case-insensitive?
// Privileges: GRANT on database/table.
// Notes: postgres requires the object owner.
// mysql requires the "grant option" and the same privileges, and sometimes superuser.
func (p *planner) Grant(n *parser.Grant) (planNode, *roachpb.Error) {
return p.changePrivileges(n.Targets, n.Grantees, func(privDesc *PrivilegeDescriptor, grantee string) {
privDesc.Grant(grantee, n.Privileges)
})
}
// Revoke removes privileges from users.
// Current status:
// - Target: single database or table.
// TODO(marc): open questions:
// - should we have root always allowed and not present in the permissions list?
// - should we make users case-insensitive?
// Privileges: GRANT on database/table.
// Notes: postgres requires the object owner.
// mysql requires the "grant option" and the same privileges, and sometimes superuser.
func (p *planner) Revoke(n *parser.Revoke) (planNode, *roachpb.Error) {
return p.changePrivileges(n.Targets, n.Grantees, func(privDesc *PrivilegeDescriptor, grantee string) {
privDesc.Revoke(grantee, n.Privileges)
})
}