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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. See the AUTHORS file
// for names of contributors.
//
// Author: Marc Berhault (marc@cockroachlabs.com)
package sql
import (
"github.com/cockroachdb/cockroach/sql/parser"
"github.com/cockroachdb/cockroach/sql/privilege"
)
// 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, error) {
descriptor, err := p.getDescriptorFromTargetList(n.Targets)
if err != nil {
return nil, err
}
if err := p.checkPrivilege(descriptor, privilege.GRANT); err != nil {
return nil, err
}
for _, grantee := range n.Grantees {
descriptor.GetPrivileges().Grant(grantee, n.Privileges)
}
if err := descriptor.Validate(); err != nil {
return nil, err
}
if tableDesc, ok := descriptor.(*TableDescriptor); ok {
// TODO(pmattis): This is a hack. Remove when schema change operations work
// properly.
p.hackNoteSchemaChange(tableDesc)
}
// Now update the descriptor.
// TODO(marc): do this inside a transaction. This will be needed
// when modifying multiple descriptors in the same op.
descKey := MakeDescMetadataKey(descriptor.GetID())
if err := p.txn.Put(descKey, wrapDescriptor(descriptor)); err != nil {
return nil, err
}
return &valuesNode{}, nil
}