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processlist.go
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processlist.go
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// Copyright 2020-2021 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 (
"sort"
"strings"
"github.com/Sndav/go-mysql-server/sql"
)
type process struct {
id int64
user string
host string
db string
command string
time int64
state string
info string
}
func (p process) toRow() sql.Row {
return sql.NewRow(
p.id,
p.user,
p.host,
p.db,
p.command,
p.time,
p.state,
p.info,
)
}
var processListSchema = sql.Schema{
{Name: "Id", Type: sql.Int64},
{Name: "User", Type: sql.LongText},
{Name: "Host", Type: sql.LongText},
{Name: "db", Type: sql.LongText},
{Name: "Command", Type: sql.LongText},
{Name: "Time", Type: sql.Int64},
{Name: "State", Type: sql.LongText},
{Name: "Info", Type: sql.LongText},
}
// ShowProcessList shows a list of all current running processes.
type ShowProcessList struct {
Database string
*sql.ProcessList
}
// NewShowProcessList creates a new ProcessList node.
func NewShowProcessList() *ShowProcessList { return new(ShowProcessList) }
// Children implements the Node interface.
func (p *ShowProcessList) Children() []sql.Node { return nil }
// Resolved implements the Node interface.
func (p *ShowProcessList) Resolved() bool { return true }
// WithChildren implements the Node interface.
func (p *ShowProcessList) WithChildren(children ...sql.Node) (sql.Node, error) {
if len(children) != 0 {
return nil, sql.ErrInvalidChildrenNumber.New(p, len(children), 0)
}
return p, nil
}
// Schema implements the Node interface.
func (p *ShowProcessList) Schema() sql.Schema { return processListSchema }
// RowIter implements the Node interface.
func (p *ShowProcessList) RowIter(ctx *sql.Context, row sql.Row) (sql.RowIter, error) {
processes := p.Processes()
var rows = make([]sql.Row, len(processes))
for i, proc := range processes {
var status []string
var names []string
for name := range proc.Progress {
names = append(names, name)
}
sort.Strings(names)
for _, name := range names {
progress := proc.Progress[name]
printer := sql.NewTreePrinter()
_ = printer.WriteNode("\n" + progress.String())
children := []string{}
for _, partitionProgress := range progress.PartitionsProgress {
children = append(children, partitionProgress.String())
}
sort.Strings(children)
_ = printer.WriteChildren(children...)
status = append(status, printer.String())
}
if len(status) == 0 {
status = []string{"running"}
}
rows[i] = process{
id: int64(proc.Connection),
user: proc.User,
time: int64(proc.Seconds()),
state: strings.Join(status, ""),
command: "Query",
host: ctx.Session.Client().Address,
info: proc.Query,
db: p.Database,
}.toRow()
}
return sql.RowsToRowIter(rows...), nil
}
func (p *ShowProcessList) String() string { return "ProcessList" }