f5daa55eb6
* executor: support xapi expression push down. * *: address comment. * *: fix subquery select from same table. * executor: add break when matched. * store/localstore: address comment.
611 lines
16 KiB
Go
611 lines
16 KiB
Go
// Copyright 2016 PingCAP, 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,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package executor
|
|
|
|
import (
|
|
"math"
|
|
"sort"
|
|
|
|
"github.com/golang/protobuf/proto"
|
|
"github.com/juju/errors"
|
|
"github.com/pingcap/tidb/ast"
|
|
"github.com/pingcap/tidb/context"
|
|
"github.com/pingcap/tidb/kv"
|
|
"github.com/pingcap/tidb/model"
|
|
"github.com/pingcap/tidb/mysql"
|
|
"github.com/pingcap/tidb/optimizer/plan"
|
|
"github.com/pingcap/tidb/parser/opcode"
|
|
"github.com/pingcap/tidb/table"
|
|
"github.com/pingcap/tidb/util/codec"
|
|
"github.com/pingcap/tidb/util/types"
|
|
"github.com/pingcap/tidb/xapi"
|
|
"github.com/pingcap/tidb/xapi/tablecodec"
|
|
"github.com/pingcap/tipb/go-tipb"
|
|
)
|
|
|
|
// XSelectTableExec represents XAPI select executor.
|
|
type XSelectTableExec struct {
|
|
table table.Table
|
|
tablePlan *plan.TableScan
|
|
where *tipb.Expr
|
|
ctx context.Context
|
|
result *xapi.SelectResult
|
|
subResult *xapi.SubResult
|
|
}
|
|
|
|
// Next implements Executor Next interface.
|
|
func (e *XSelectTableExec) Next() (*Row, error) {
|
|
if e.result == nil {
|
|
err := e.doRequest()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
}
|
|
for {
|
|
if e.subResult == nil {
|
|
var err error
|
|
e.subResult, err = e.result.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if e.subResult == nil {
|
|
return nil, nil
|
|
}
|
|
}
|
|
h, rowData, err := e.subResult.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if rowData == nil {
|
|
e.subResult = nil
|
|
continue
|
|
}
|
|
fullRowData := make([]types.Datum, len(e.tablePlan.Fields()))
|
|
var j int
|
|
for i, field := range e.tablePlan.Fields() {
|
|
if field.Referenced {
|
|
fullRowData[i] = rowData[j]
|
|
field.Expr.SetDatum(rowData[j])
|
|
j++
|
|
}
|
|
}
|
|
return resultRowToRow(e.table, h, fullRowData), nil
|
|
}
|
|
}
|
|
|
|
// Fields implements Executor Fields interface.
|
|
func (e *XSelectTableExec) Fields() []*ast.ResultField {
|
|
return e.tablePlan.Fields()
|
|
}
|
|
|
|
// Close implements Executor Close interface.
|
|
func (e *XSelectTableExec) Close() error {
|
|
if e.result != nil {
|
|
e.result.Close()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func resultRowToRow(t table.Table, h int64, data []types.Datum) *Row {
|
|
entry := &RowKeyEntry{Handle: h, Tbl: t}
|
|
return &Row{Data: data, RowKeys: []*RowKeyEntry{entry}}
|
|
}
|
|
|
|
func (e *XSelectTableExec) doRequest() error {
|
|
// TODO: add offset and limit.
|
|
txn, err := e.ctx.GetTxn(false)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
selReq := new(tipb.SelectRequest)
|
|
startTs := txn.StartTS()
|
|
selReq.StartTs = &startTs
|
|
selReq.Fields = resultFieldsToPBExpression(e.tablePlan.Fields())
|
|
selReq.Where = e.where
|
|
selReq.Ranges = tableRangesToPBRanges(e.tablePlan.Ranges)
|
|
|
|
columns := make([]*model.ColumnInfo, 0, len(e.tablePlan.Fields()))
|
|
for _, v := range e.tablePlan.Fields() {
|
|
if v.Referenced {
|
|
columns = append(columns, v.Column)
|
|
}
|
|
}
|
|
selReq.TableInfo = &tipb.TableInfo{
|
|
TableId: proto.Int64(e.table.Meta().ID),
|
|
}
|
|
selReq.TableInfo.Columns = tablecodec.ColumnsToProto(columns, e.table.Meta().PKIsHandle)
|
|
e.result, err = xapi.Select(txn.GetClient(), selReq, 1)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// XSelectIndexExec represents XAPI select index executor.
|
|
type XSelectIndexExec struct {
|
|
table table.Table
|
|
indexPlan *plan.IndexScan
|
|
ctx context.Context
|
|
where *tipb.Expr
|
|
rows []*Row
|
|
cursor int
|
|
}
|
|
|
|
// Fields implements Executor Fields interface.
|
|
func (e *XSelectIndexExec) Fields() []*ast.ResultField {
|
|
return e.indexPlan.Fields()
|
|
}
|
|
|
|
// Next implements Executor Next interface.
|
|
func (e *XSelectIndexExec) Next() (*Row, error) {
|
|
if e.rows == nil {
|
|
err := e.doRequest()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
}
|
|
if e.cursor >= len(e.rows) {
|
|
return nil, nil
|
|
}
|
|
row := e.rows[e.cursor]
|
|
for i, field := range e.indexPlan.Fields() {
|
|
field.Expr.SetDatum(row.Data[i])
|
|
}
|
|
e.cursor++
|
|
return row, nil
|
|
}
|
|
|
|
// Close implements Executor Close interface.
|
|
func (e *XSelectIndexExec) Close() error {
|
|
return nil
|
|
}
|
|
|
|
func (e *XSelectIndexExec) doRequest() error {
|
|
txn, err := e.ctx.GetTxn(false)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
idxResult, err := e.doIndexRequest(txn)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
handles, err := extractHandlesFromIndexResult(idxResult)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
if len(handles) == 0 {
|
|
return nil
|
|
}
|
|
|
|
var indexOrder map[int64]int
|
|
if !e.indexPlan.OutOfOrder {
|
|
// Save the index order.
|
|
indexOrder = make(map[int64]int)
|
|
for i, h := range handles {
|
|
indexOrder[h] = i
|
|
}
|
|
}
|
|
|
|
sort.Sort(int64Slice(handles))
|
|
tblResult, err := e.doTableRequest(txn, handles)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
rows, err := e.extractRowsFromTableResult(e.table, tblResult)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
if !e.indexPlan.OutOfOrder {
|
|
// Restore the index order.
|
|
sorter := &rowsSorter{order: indexOrder, rows: rows}
|
|
sort.Sort(sorter)
|
|
}
|
|
e.rows = rows
|
|
return nil
|
|
}
|
|
|
|
type rowsSorter struct {
|
|
order map[int64]int
|
|
rows []*Row
|
|
}
|
|
|
|
func (s *rowsSorter) Less(i, j int) bool {
|
|
x := s.order[s.rows[i].RowKeys[0].Handle]
|
|
y := s.order[s.rows[j].RowKeys[0].Handle]
|
|
return x < y
|
|
}
|
|
|
|
func (s *rowsSorter) Len() int {
|
|
return len(s.rows)
|
|
}
|
|
|
|
func (s *rowsSorter) Swap(i, j int) {
|
|
s.rows[i], s.rows[j] = s.rows[j], s.rows[i]
|
|
}
|
|
|
|
func (e *XSelectIndexExec) doIndexRequest(txn kv.Transaction) (*xapi.SelectResult, error) {
|
|
// TODO: add offset and limit.
|
|
selIdxReq := new(tipb.SelectRequest)
|
|
startTs := txn.StartTS()
|
|
selIdxReq.StartTs = &startTs
|
|
selIdxReq.IndexInfo = tablecodec.IndexToProto(e.table.Meta(), e.indexPlan.Index)
|
|
fieldTypes := make([]*types.FieldType, len(e.indexPlan.Index.Columns))
|
|
for i, v := range e.indexPlan.Index.Columns {
|
|
fieldTypes[i] = &(e.table.Cols()[v.Offset].FieldType)
|
|
}
|
|
var err error
|
|
selIdxReq.Ranges, err = indexRangesToPBRanges(e.indexPlan.Ranges, fieldTypes)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
return xapi.Select(txn.GetClient(), selIdxReq, 1)
|
|
}
|
|
|
|
func (e *XSelectIndexExec) doTableRequest(txn kv.Transaction, handles []int64) (*xapi.SelectResult, error) {
|
|
// TODO: add offset and limit.
|
|
selTableReq := new(tipb.SelectRequest)
|
|
startTs := txn.StartTS()
|
|
selTableReq.StartTs = &startTs
|
|
columns := make([]*model.ColumnInfo, 0, len(e.indexPlan.Fields()))
|
|
for _, v := range e.indexPlan.Fields() {
|
|
if v.Referenced {
|
|
columns = append(columns, v.Column)
|
|
}
|
|
}
|
|
selTableReq.TableInfo = &tipb.TableInfo{
|
|
TableId: proto.Int64(e.table.Meta().ID),
|
|
}
|
|
selTableReq.TableInfo.Columns = tablecodec.ColumnsToProto(columns, e.table.Meta().PKIsHandle)
|
|
selTableReq.Fields = resultFieldsToPBExpression(e.indexPlan.Fields())
|
|
for _, h := range handles {
|
|
if h == math.MaxInt64 {
|
|
// We can't convert MaxInt64 into an left closed, right open range.
|
|
continue
|
|
}
|
|
pbRange := new(tipb.KeyRange)
|
|
pbRange.Low = codec.EncodeInt(nil, h)
|
|
pbRange.High = kv.Key(pbRange.Low).PrefixNext()
|
|
selTableReq.Ranges = append(selTableReq.Ranges, pbRange)
|
|
}
|
|
selTableReq.Where = e.where
|
|
return xapi.Select(txn.GetClient(), selTableReq, 10)
|
|
}
|
|
|
|
// conditionsToPBExpr tries to convert filter conditions to a tipb.Expr.
|
|
// not supported conditions will be returned in remained.
|
|
func conditionsToPBExpr(client kv.Client, exprs []ast.ExprNode, tn *ast.TableName) (pbexpr *tipb.Expr,
|
|
remained []ast.ExprNode) {
|
|
for _, expr := range exprs {
|
|
v := exprToPBExpr(client, expr, tn)
|
|
if v == nil {
|
|
remained = append(remained, expr)
|
|
} else {
|
|
if pbexpr == nil {
|
|
pbexpr = v
|
|
} else {
|
|
// merge multiple converted pb expression into an AND expression.
|
|
pbexpr = &tipb.Expr{Tp: tipb.ExprType_And.Enum(), Children: []*tipb.Expr{pbexpr, v}}
|
|
}
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func resultFieldsToPBExpression(fields []*ast.ResultField) []*tipb.Expr {
|
|
return nil
|
|
}
|
|
|
|
func tableRangesToPBRanges(tableRanges []plan.TableRange) []*tipb.KeyRange {
|
|
hrs := make([]*tipb.KeyRange, 0, len(tableRanges))
|
|
for _, tableRange := range tableRanges {
|
|
pbRange := new(tipb.KeyRange)
|
|
pbRange.Low = codec.EncodeInt(nil, tableRange.LowVal)
|
|
hi := tableRange.HighVal
|
|
if hi != math.MaxInt64 {
|
|
hi++
|
|
}
|
|
pbRange.High = codec.EncodeInt(nil, hi)
|
|
hrs = append(hrs, pbRange)
|
|
}
|
|
return hrs
|
|
}
|
|
|
|
func indexRangesToPBRanges(ranges []*plan.IndexRange, fieldTypes []*types.FieldType) ([]*tipb.KeyRange, error) {
|
|
keyRanges := make([]*tipb.KeyRange, 0, len(ranges))
|
|
for _, ran := range ranges {
|
|
err := convertIndexRangeTypes(ran, fieldTypes)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
low, err := codec.EncodeKey(nil, ran.LowVal...)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if ran.LowExclude {
|
|
low = []byte(kv.Key(low).PrefixNext())
|
|
}
|
|
high, err := codec.EncodeKey(nil, ran.HighVal...)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if !ran.HighExclude {
|
|
high = []byte(kv.Key(high).PrefixNext())
|
|
}
|
|
keyRanges = append(keyRanges, &tipb.KeyRange{Low: low, High: high})
|
|
}
|
|
return keyRanges, nil
|
|
}
|
|
|
|
func convertIndexRangeTypes(ran *plan.IndexRange, fieldTypes []*types.FieldType) error {
|
|
for i := range ran.LowVal {
|
|
if ran.LowVal[i].Kind() == types.KindMinNotNull {
|
|
ran.LowVal[i].SetBytes([]byte{})
|
|
continue
|
|
}
|
|
converted, err := ran.LowVal[i].ConvertTo(fieldTypes[i])
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
cmp, err := converted.CompareDatum(ran.LowVal[i])
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
ran.LowVal[i] = converted
|
|
if cmp == 0 {
|
|
continue
|
|
}
|
|
if cmp < 0 && !ran.LowExclude {
|
|
// For int column a, a >= 1.1 is converted to a > 1.
|
|
ran.LowExclude = true
|
|
} else if cmp > 0 && ran.LowExclude {
|
|
// For int column a, a > 1.9 is converted to a >= 2.
|
|
ran.LowExclude = false
|
|
}
|
|
// The converted value has changed, the other column values doesn't matter.
|
|
// For equal condition, converted value changed means there will be no match.
|
|
// For non equal condition, this column would be the last one to build the range.
|
|
// Break here to prevent the rest columns modify LowExclude again.
|
|
break
|
|
}
|
|
for i := range ran.HighVal {
|
|
if ran.HighVal[i].Kind() == types.KindMaxValue {
|
|
continue
|
|
}
|
|
converted, err := ran.HighVal[i].ConvertTo(fieldTypes[i])
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
cmp, err := converted.CompareDatum(ran.HighVal[i])
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
ran.HighVal[i] = converted
|
|
if cmp == 0 {
|
|
continue
|
|
}
|
|
// For int column a, a < 1.1 is converted to a <= 1.
|
|
if cmp < 0 && ran.HighExclude {
|
|
ran.HighExclude = false
|
|
}
|
|
// For int column a, a <= 1.9 is converted to a < 2.
|
|
if cmp > 0 && !ran.HighExclude {
|
|
ran.HighExclude = true
|
|
}
|
|
break
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func extractHandlesFromIndexResult(idxResult *xapi.SelectResult) ([]int64, error) {
|
|
var handles []int64
|
|
for {
|
|
subResult, err := idxResult.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if subResult == nil {
|
|
break
|
|
}
|
|
subHandles, err := extractHandlesFromIndexSubResult(subResult)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
handles = append(handles, subHandles...)
|
|
}
|
|
return handles, nil
|
|
}
|
|
|
|
func extractHandlesFromIndexSubResult(subResult *xapi.SubResult) ([]int64, error) {
|
|
var handles []int64
|
|
for {
|
|
h, data, err := subResult.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if data == nil {
|
|
break
|
|
}
|
|
handles = append(handles, h)
|
|
}
|
|
return handles, nil
|
|
}
|
|
|
|
func (e *XSelectIndexExec) extractRowsFromTableResult(t table.Table, tblResult *xapi.SelectResult) ([]*Row, error) {
|
|
var rows []*Row
|
|
for {
|
|
subResult, err := tblResult.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if subResult == nil {
|
|
break
|
|
}
|
|
subRows, err := e.extractRowsFromSubResult(t, subResult)
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
rows = append(rows, subRows...)
|
|
}
|
|
return rows, nil
|
|
}
|
|
|
|
func (e *XSelectIndexExec) extractRowsFromSubResult(t table.Table, subResult *xapi.SubResult) ([]*Row, error) {
|
|
var rows []*Row
|
|
for {
|
|
h, rowData, err := subResult.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if rowData == nil {
|
|
break
|
|
}
|
|
fullRowData := make([]types.Datum, len(e.indexPlan.Fields()))
|
|
var j int
|
|
for i, field := range e.indexPlan.Fields() {
|
|
if field.Referenced {
|
|
fullRowData[i] = rowData[j]
|
|
field.Expr.SetDatum(fullRowData[i])
|
|
j++
|
|
}
|
|
}
|
|
row := resultRowToRow(t, h, fullRowData)
|
|
rows = append(rows, row)
|
|
}
|
|
return rows, nil
|
|
}
|
|
|
|
type int64Slice []int64
|
|
|
|
func (p int64Slice) Len() int { return len(p) }
|
|
func (p int64Slice) Less(i, j int) bool { return p[i] < p[j] }
|
|
func (p int64Slice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
|
|
|
|
// exprToPBExpr converts an ast.ExprNode to a tipb.Expr, if not supported, nil will be returned.
|
|
func exprToPBExpr(client kv.Client, expr ast.ExprNode, tn *ast.TableName) *tipb.Expr {
|
|
switch x := expr.(type) {
|
|
case *ast.ValueExpr, *ast.ParamMarkerExpr:
|
|
return datumToPBExpr(client, *expr.GetDatum())
|
|
case *ast.ColumnNameExpr:
|
|
return columnNameToPBExpr(client, x, tn)
|
|
case *ast.BinaryOperationExpr:
|
|
return binopToPBExpr(client, x, tn)
|
|
case *ast.ParenthesesExpr:
|
|
return exprToPBExpr(client, x.Expr, tn)
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func columnNameToPBExpr(client kv.Client, column *ast.ColumnNameExpr, tn *ast.TableName) *tipb.Expr {
|
|
if !client.SupportRequestType(kv.ReqTypeSelect, int64(tipb.ExprType_ColumnRef)) {
|
|
return nil
|
|
}
|
|
// Zero Column ID is not a column from table, can not support for now.
|
|
if column.Refer.Column.ID == 0 {
|
|
return nil
|
|
}
|
|
switch column.Refer.Expr.GetType().Tp {
|
|
case mysql.TypeBit, mysql.TypeSet, mysql.TypeEnum, mysql.TypeDecimal, mysql.TypeNewDecimal, mysql.TypeGeometry,
|
|
mysql.TypeDate, mysql.TypeNewDate, mysql.TypeDatetime, mysql.TypeDuration, mysql.TypeTimestamp, mysql.TypeYear:
|
|
return nil
|
|
}
|
|
matched := false
|
|
for _, f := range tn.GetResultFields() {
|
|
if f.TableName == column.Refer.TableName && f.Column.ID == column.Refer.Column.ID {
|
|
matched = true
|
|
break
|
|
}
|
|
}
|
|
if matched {
|
|
pbExpr := new(tipb.Expr)
|
|
pbExpr.Tp = tipb.ExprType_ColumnRef.Enum()
|
|
pbExpr.Val = codec.EncodeInt(nil, column.Refer.Column.ID)
|
|
return pbExpr
|
|
}
|
|
// If the column ID is in fields, it means the column is from an outer table,
|
|
// its value is available to use.
|
|
return datumToPBExpr(client, *column.Refer.Expr.GetDatum())
|
|
}
|
|
|
|
func datumToPBExpr(client kv.Client, d types.Datum) *tipb.Expr {
|
|
var tp tipb.ExprType
|
|
var val []byte
|
|
switch d.Kind() {
|
|
case types.KindNull:
|
|
tp = tipb.ExprType_Null
|
|
case types.KindInt64:
|
|
tp = tipb.ExprType_Int64
|
|
val = codec.EncodeInt(nil, d.GetInt64())
|
|
case types.KindUint64:
|
|
tp = tipb.ExprType_Uint64
|
|
val = codec.EncodeUint(nil, d.GetUint64())
|
|
case types.KindString:
|
|
tp = tipb.ExprType_String
|
|
val = d.GetBytes()
|
|
case types.KindBytes:
|
|
tp = tipb.ExprType_Bytes
|
|
val = d.GetBytes()
|
|
case types.KindFloat32:
|
|
tp = tipb.ExprType_Float32
|
|
val = codec.EncodeFloat(nil, d.GetFloat64())
|
|
case types.KindFloat64:
|
|
tp = tipb.ExprType_Float64
|
|
val = codec.EncodeFloat(nil, d.GetFloat64())
|
|
default:
|
|
return nil
|
|
}
|
|
if !client.SupportRequestType(kv.ReqTypeSelect, int64(tp)) {
|
|
return nil
|
|
}
|
|
return &tipb.Expr{Tp: tp.Enum(), Val: val}
|
|
}
|
|
|
|
func binopToPBExpr(client kv.Client, expr *ast.BinaryOperationExpr, tn *ast.TableName) *tipb.Expr {
|
|
var tp tipb.ExprType
|
|
switch expr.Op {
|
|
case opcode.LT:
|
|
tp = tipb.ExprType_LT
|
|
case opcode.LE:
|
|
tp = tipb.ExprType_LE
|
|
case opcode.EQ:
|
|
tp = tipb.ExprType_EQ
|
|
case opcode.NE:
|
|
tp = tipb.ExprType_NE
|
|
case opcode.GE:
|
|
tp = tipb.ExprType_GE
|
|
case opcode.GT:
|
|
tp = tipb.ExprType_GT
|
|
case opcode.NullEQ:
|
|
tp = tipb.ExprType_NullEQ
|
|
case opcode.AndAnd:
|
|
tp = tipb.ExprType_And
|
|
case opcode.OrOr:
|
|
tp = tipb.ExprType_Or
|
|
default:
|
|
return nil
|
|
}
|
|
if !client.SupportRequestType(kv.ReqTypeSelect, int64(tp)) {
|
|
return nil
|
|
}
|
|
leftExpr := exprToPBExpr(client, expr.L, tn)
|
|
if leftExpr == nil {
|
|
return nil
|
|
}
|
|
rightExpr := exprToPBExpr(client, expr.R, tn)
|
|
if rightExpr == nil {
|
|
return nil
|
|
}
|
|
return &tipb.Expr{Tp: tp.Enum(), Children: []*tipb.Expr{leftExpr, rightExpr}}
|
|
}
|