tidb main 源码
tidb main 代码
文件路径：/cmd/importer/main.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,
// 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 main
import (
"flag"
"os"
"github.com/pingcap/errors"
"github.com/pingcap/log"
"go.uber.org/zap"
)
func main() {
cfg := NewConfig()
err := cfg.Parse(os.Args[1:])
switch errors.Cause(err) {
case nil:
case flag.ErrHelp:
os.Exit(0)
default:
log.Error("parse cmd flags", zap.Error(err))
os.Exit(2)
}
table := newTable()
err = parseTableSQL(table, cfg.DDLCfg.TableSQL)
if err != nil {
log.Fatal(err.Error())
}
err = parseIndexSQL(table, cfg.DDLCfg.IndexSQL)
if err != nil {
log.Fatal(err.Error())
}
dbs, err := createDBs(cfg.DBCfg, cfg.SysCfg.WorkerCount)
if err != nil {
log.Fatal(err.Error())
}
defer closeDBs(dbs)
if len(cfg.StatsCfg.Path) > 0 {
statsInfo, err1 := loadStats(table.tblInfo, cfg.StatsCfg.Path)
if err1 != nil {
log.Fatal(err1.Error())
}
for _, idxInfo := range table.tblInfo.Indices {
offset := idxInfo.Columns[0].Offset
if hist, ok := statsInfo.Indices[idxInfo.ID]; ok && len(hist.Buckets) > 0 {
table.columns[offset].hist = &histogram{
Histogram: hist.Histogram,
index: hist.Info,
}
}
}
for i, colInfo := range table.tblInfo.Columns {
if hist, ok := statsInfo.Columns[colInfo.ID]; ok && table.columns[i].hist == nil && len(hist.Buckets) > 0 {
table.columns[i].hist = &histogram{
Histogram: hist.Histogram,
}
}
}
}
err = execSQL(dbs[0], cfg.DDLCfg.TableSQL)
if err != nil {
log.Fatal(err.Error())
}
err = execSQL(dbs[0], cfg.DDLCfg.IndexSQL)
if err != nil {
log.Fatal(err.Error())
}
doProcess(table, dbs, cfg.SysCfg.JobCount, cfg.SysCfg.WorkerCount, cfg.SysCfg.Batch)
}
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