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133 lines
3.3 KiB
133 lines
3.3 KiB
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package server
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import (
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"net/http"
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"time"
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"github.com/gorilla/mux"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/domain"
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"github.com/pingcap/tidb/session"
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"github.com/pingcap/tidb/sessionctx/variable"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/gcutil"
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"github.com/pingcap/tidb/util/sqlexec"
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)
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// StatsHandler is the handler for dumping statistics.
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type StatsHandler struct {
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do *domain.Domain
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}
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func (s *Server) newStatsHandler() *StatsHandler {
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store, ok := s.driver.(*TiDBDriver)
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if !ok {
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panic("Illegal driver")
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}
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do, err := session.GetDomain(store.store)
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if err != nil {
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panic("Failed to get domain")
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}
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return &StatsHandler{do}
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}
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func (sh StatsHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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params := mux.Vars(req)
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is := sh.do.InfoSchema()
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h := sh.do.StatsHandle()
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tbl, err := is.TableByName(model.NewCIStr(params[pDBName]), model.NewCIStr(params[pTableName]))
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if err != nil {
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writeError(w, err)
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} else {
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js, err := h.DumpStatsToJSON(params[pDBName], tbl.Meta(), nil)
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if err != nil {
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writeError(w, err)
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} else {
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writeData(w, js)
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}
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}
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}
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// StatsHistoryHandler is the handler for dumping statistics.
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type StatsHistoryHandler struct {
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do *domain.Domain
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}
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func (s *Server) newStatsHistoryHandler() *StatsHistoryHandler {
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store, ok := s.driver.(*TiDBDriver)
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if !ok {
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panic("Illegal driver")
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}
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do, err := session.GetDomain(store.store)
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if err != nil {
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panic("Failed to get domain")
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}
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return &StatsHistoryHandler{do}
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}
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func (sh StatsHistoryHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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params := mux.Vars(req)
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se, err := session.CreateSession(sh.do.Store())
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if err != nil {
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writeError(w, err)
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return
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}
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se.GetSessionVars().StmtCtx.TimeZone = time.Local
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t, err := types.ParseTime(se.GetSessionVars().StmtCtx, params[pSnapshot], mysql.TypeTimestamp, 6)
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if err != nil {
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writeError(w, err)
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return
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}
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t1, err := t.GoTime(time.Local)
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if err != nil {
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writeError(w, err)
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return
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}
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snapshot := variable.GoTimeToTS(t1)
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err = gcutil.ValidateSnapshot(se, snapshot)
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if err != nil {
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writeError(w, err)
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return
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}
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is, err := sh.do.GetSnapshotInfoSchema(snapshot)
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if err != nil {
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writeError(w, err)
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return
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}
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h := sh.do.StatsHandle()
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tbl, err := is.TableByName(model.NewCIStr(params[pDBName]), model.NewCIStr(params[pTableName]))
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if err != nil {
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writeError(w, err)
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return
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}
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se.GetSessionVars().SnapshotInfoschema, se.GetSessionVars().SnapshotTS = is, snapshot
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historyStatsExec := se.(sqlexec.RestrictedSQLExecutor)
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js, err := h.DumpStatsToJSON(params[pDBName], tbl.Meta(), historyStatsExec)
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if err != nil {
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writeError(w, err)
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} else {
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writeData(w, js)
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}
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}
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