github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/parsers/tree/truncate.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 "github.com/matrixorigin/matrixone/pkg/common/reuse"
    18  
    19  func init() {
    20  	reuse.CreatePool[TruncateTable](
    21  		func() *TruncateTable { return &TruncateTable{} },
    22  		func(t *TruncateTable) { t.reset() },
    23  		reuse.DefaultOptions[TruncateTable](), //.
    24  	) //WithEnableChecker()
    25  
    26  }
    27  
    28  // truncate table statement
    29  type TruncateTable struct {
    30  	statementImpl
    31  	Name *TableName
    32  }
    33  
    34  func NewTruncateTable(name *TableName) *TruncateTable {
    35  	truncate := reuse.Alloc[TruncateTable](nil)
    36  	truncate.Name = name
    37  	return truncate
    38  }
    39  
    40  func (node *TruncateTable) Format(ctx *FmtCtx) {
    41  	ctx.WriteString("truncate table")
    42  	ctx.WriteByte(' ')
    43  	node.Name.Format(ctx)
    44  }
    45  
    46  func (node *TruncateTable) GetStatementType() string { return "Truncate" }
    47  func (node *TruncateTable) GetQueryType() string     { return QueryTypeDDL }
    48  
    49  func (node *TruncateTable) Free() {
    50  	reuse.Free[TruncateTable](node, nil)
    51  }
    52  
    53  func (node *TruncateTable) reset() {
    54  	// if node.Name != nil {
    55  	// node.Name.Free()
    56  	// }
    57  	*node = TruncateTable{}
    58  }
    59  
    60  func (node TruncateTable) TypeName() string { return "tree.TruncateTable" }