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rename_user.go
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rename_user.go
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// Copyright 2021 Dolthub, Inc.
//
// 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.
package plan
import (
"fmt"
"strings"
"github.com/dolthub/go-mysql-server/sql"
"github.com/dolthub/go-mysql-server/sql/types"
)
// RenameUser represents the statement RENAME USER.
type RenameUser struct {
OldName []UserName
NewName []UserName
}
var _ sql.Node = (*RenameUser)(nil)
var _ sql.CollationCoercible = (*RenameUser)(nil)
// NewRenameUser returns a new RenameUser node.
func NewRenameUser(oldNames []UserName, newNames []UserName) *RenameUser {
return &RenameUser{
OldName: oldNames,
NewName: newNames,
}
}
// Schema implements the interface sql.Node.
func (n *RenameUser) Schema() sql.Schema {
return types.OkResultSchema
}
func (n *RenameUser) IsReadOnly() bool {
return false
}
// String implements the interface sql.Node.
func (n *RenameUser) String() string {
strs := make([]string, len(n.OldName))
for i := range n.OldName {
strs[i] = fmt.Sprintf("%s->%s",
n.OldName[i].String(""), n.NewName[i].String(""))
}
return fmt.Sprintf("RenameUser(%s)", strings.Join(strs, ", "))
}
// Resolved implements the interface sql.Node.
func (n *RenameUser) Resolved() bool {
return true
}
// Children implements the interface sql.Node.
func (n *RenameUser) Children() []sql.Node {
return nil
}
// WithChildren implements the interface sql.Node.
func (n *RenameUser) WithChildren(children ...sql.Node) (sql.Node, error) {
if len(children) != 0 {
return nil, sql.ErrInvalidChildrenNumber.New(n, len(children), 0)
}
return n, nil
}
// CheckPrivileges implements the interface sql.Node.
func (n *RenameUser) CheckPrivileges(ctx *sql.Context, opChecker sql.PrivilegedOperationChecker) bool {
return opChecker.UserHasPrivileges(ctx, sql.NewPrivilegedOperation(sql.PrivilegeCheckSubject{}, sql.PrivilegeType_CreateUser))
}
// CollationCoercibility implements the interface sql.CollationCoercible.
func (*RenameUser) CollationCoercibility(ctx *sql.Context) (collation sql.CollationID, coercibility byte) {
return sql.Collation_binary, 7
}
// RowIter implements the interface sql.Node.
func (n *RenameUser) RowIter(ctx *sql.Context, row sql.Row) (sql.RowIter, error) {
return nil, fmt.Errorf("not yet implemented")
}