github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/parsers/tree/kill.go (about)

     1  // Copyright 2021 Matrix Origin
     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 tree
    16  
    17  import "fmt"
    18  
    19  type KillType int
    20  
    21  const (
    22  	KillTypeConnection KillType = iota
    23  	KillTypeQuery
    24  )
    25  
    26  func (k KillType) String() string {
    27  	switch k {
    28  	case KillTypeConnection:
    29  		return "connection"
    30  	case KillTypeQuery:
    31  		return "query"
    32  	default:
    33  		return ""
    34  	}
    35  }
    36  
    37  type KillOption struct {
    38  	Exist bool
    39  	Typ   KillType
    40  }
    41  
    42  func (ko KillOption) Format(ctx *FmtCtx) {
    43  	if ko.Exist {
    44  		ctx.WriteString(ko.Typ.String())
    45  	}
    46  }
    47  
    48  type StatementOption struct {
    49  	Exist       bool
    50  	StatementId string
    51  }
    52  
    53  func (so StatementOption) Format(ctx *FmtCtx) {
    54  	if so.Exist {
    55  		ctx.WriteString(so.StatementId)
    56  	}
    57  }
    58  
    59  type Kill struct {
    60  	statementImpl
    61  	Option       KillOption
    62  	ConnectionId uint64
    63  	StmtOption   StatementOption
    64  }
    65  
    66  func (k *Kill) Format(ctx *FmtCtx) {
    67  	ctx.WriteString("kill")
    68  	if k.Option.Exist {
    69  		ctx.WriteByte(' ')
    70  		k.Option.Format(ctx)
    71  	}
    72  	ctx.WriteByte(' ')
    73  	ctx.WriteString(fmt.Sprintf("%d", k.ConnectionId))
    74  	if k.StmtOption.Exist {
    75  		ctx.WriteByte(' ')
    76  		ctx.WriteByte('"')
    77  		ctx.WriteString(k.StmtOption.StatementId)
    78  		ctx.WriteByte('"')
    79  	}
    80  }
    81  
    82  func (k *Kill) GetStatementType() string { return "kill" }
    83  func (k *Kill) GetQueryType() string     { return QueryTypeOth }