github.com/dolthub/go-mysql-server@v0.18.0/sql/plan/rename_user.go (about)

     1  // Copyright 2021 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package plan
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	"github.com/dolthub/go-mysql-server/sql"
    22  	"github.com/dolthub/go-mysql-server/sql/types"
    23  )
    24  
    25  // RenameUser represents the statement RENAME USER.
    26  type RenameUser struct {
    27  	OldName []UserName
    28  	NewName []UserName
    29  }
    30  
    31  var _ sql.Node = (*RenameUser)(nil)
    32  var _ sql.CollationCoercible = (*RenameUser)(nil)
    33  
    34  // NewRenameUser returns a new RenameUser node.
    35  func NewRenameUser(oldNames []UserName, newNames []UserName) *RenameUser {
    36  	return &RenameUser{
    37  		OldName: oldNames,
    38  		NewName: newNames,
    39  	}
    40  }
    41  
    42  // Schema implements the interface sql.Node.
    43  func (n *RenameUser) Schema() sql.Schema {
    44  	return types.OkResultSchema
    45  }
    46  
    47  func (n *RenameUser) IsReadOnly() bool {
    48  	return false
    49  }
    50  
    51  // String implements the interface sql.Node.
    52  func (n *RenameUser) String() string {
    53  	strs := make([]string, len(n.OldName))
    54  	for i := range n.OldName {
    55  		strs[i] = fmt.Sprintf("%s->%s",
    56  			n.OldName[i].String(""), n.NewName[i].String(""))
    57  	}
    58  	return fmt.Sprintf("RenameUser(%s)", strings.Join(strs, ", "))
    59  }
    60  
    61  // Resolved implements the interface sql.Node.
    62  func (n *RenameUser) Resolved() bool {
    63  	return true
    64  }
    65  
    66  // Children implements the interface sql.Node.
    67  func (n *RenameUser) Children() []sql.Node {
    68  	return nil
    69  }
    70  
    71  // WithChildren implements the interface sql.Node.
    72  func (n *RenameUser) WithChildren(children ...sql.Node) (sql.Node, error) {
    73  	if len(children) != 0 {
    74  		return nil, sql.ErrInvalidChildrenNumber.New(n, len(children), 0)
    75  	}
    76  	return n, nil
    77  }
    78  
    79  // CheckPrivileges implements the interface sql.Node.
    80  func (n *RenameUser) CheckPrivileges(ctx *sql.Context, opChecker sql.PrivilegedOperationChecker) bool {
    81  	return opChecker.UserHasPrivileges(ctx, sql.NewPrivilegedOperation(sql.PrivilegeCheckSubject{}, sql.PrivilegeType_CreateUser))
    82  }
    83  
    84  // CollationCoercibility implements the interface sql.CollationCoercible.
    85  func (*RenameUser) CollationCoercibility(ctx *sql.Context) (collation sql.CollationID, coercibility byte) {
    86  	return sql.Collation_binary, 7
    87  }
    88  
    89  // RowIter implements the interface sql.Node.
    90  func (n *RenameUser) RowIter(ctx *sql.Context, row sql.Row) (sql.RowIter, error) {
    91  	return nil, fmt.Errorf("not yet implemented")
    92  }