/
query.go
498 lines (474 loc) · 17.3 KB
/
query.go
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/*
* Radon
*
* Copyright 2018 The Radon Authors.
* Code is licensed under the GPLv3.
*
*/
package proxy
import (
"strings"
"time"
"monitor"
"xbase"
"github.com/xelabs/go-mysqlstack/driver"
"github.com/xelabs/go-mysqlstack/sqldb"
"github.com/xelabs/go-mysqlstack/sqlparser"
"github.com/xelabs/go-mysqlstack/sqlparser/depends/common"
querypb "github.com/xelabs/go-mysqlstack/sqlparser/depends/query"
"github.com/xelabs/go-mysqlstack/sqlparser/depends/sqltypes"
)
func returnQuery(qr *sqltypes.Result, callback func(qr *sqltypes.Result) error, err error) error {
if err != nil {
return err
}
callback(qr)
return nil
}
// ComQuery impl.
// Supports statements are:
// 1. DDL
// 2. DML
// 3. USE DB: MySQL client use 'database' won't pass here, FIXME.
func (spanner *Spanner) ComQuery(session *driver.Session, query string, bindVariables map[string]*querypb.BindVariable, callback func(qr *sqltypes.Result) error) error {
var qr *sqltypes.Result
log := spanner.log
throttle := spanner.throttle
diskChecker := spanner.diskChecker
timeStart := time.Now()
slowQueryTime := time.Duration(spanner.conf.Proxy.LongQueryTime) * time.Second
// Throttle.
throttle.Acquire()
defer throttle.Release()
// Disk usage check.
if diskChecker.HighWater() {
return sqldb.NewSQLErrorf(sqldb.ER_UNKNOWN_ERROR, "%s", "no space left on device")
}
// Support for JDBC/Others driver.
if spanner.isConnectorFilter(query) {
qr, err := spanner.handleJDBCShows(session, query, nil)
if err == nil {
qr.Warnings = 1
}
return returnQuery(qr, callback, err)
}
// Trim space and ';'.
query = strings.TrimSpace(query)
query = strings.TrimSuffix(query, ";")
node, err := sqlparser.Parse(query)
if err != nil {
log.Error("query[%v].parser.error: %v", query, err)
return sqldb.NewSQLError(sqldb.ER_SYNTAX_ERROR, err.Error())
}
// Bind variables.
if bindVariables != nil {
parsedQuery := sqlparser.NewParsedQuery(node)
query, err = parsedQuery.GenerateQuery(bindVariables, nil)
if err != nil {
log.Error("query[%v].parsed.GenerateQuery.error: %v, bind:%+v", query, err, bindVariables)
return sqldb.NewSQLError(sqldb.ER_SYNTAX_ERROR, err.Error())
}
// This sucks.
node, err = sqlparser.Parse(query)
if err != nil {
log.Error("query[%v].parser.error: %v", query, err)
return sqldb.NewSQLError(sqldb.ER_SYNTAX_ERROR, err.Error())
}
}
if spanner.isLowerCaseTableNames() {
node = sqlparser.LowerCaseTableNames(node).(sqlparser.Statement)
query = sqlparser.String(node)
}
log.Debug("query:%v", query)
// Readonly check.
if spanner.ReadOnly() {
// DML Write denied.
if spanner.IsDMLWrite(node) {
return sqldb.NewSQLError(sqldb.ER_OPTION_PREVENTS_STATEMENT, "--read-only")
}
// DDL denied.
if spanner.IsDDL(node) {
return sqldb.NewSQLError(sqldb.ER_OPTION_PREVENTS_STATEMENT, "--read-only")
}
// Admin command denied.
if spanner.IsAdminCmd(node) {
return sqldb.NewSQLError(sqldb.ER_OPTION_PREVENTS_STATEMENT, "--read-only")
}
}
defer func() {
queryStat(node, timeStart, slowQueryTime, err)
}()
// The status of the execution result, zero for success and non-zero for failure.
status := uint16(0)
switch node := node.(type) {
case *sqlparser.Use:
if qr, err = spanner.handleUseDB(session, query, node); err != nil {
log.Error("proxy.usedb[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.USEDB, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.DDL:
if qr, err = spanner.handleDDL(session, query, node); err != nil {
log.Error("proxy.DDL[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, W, xbase.DDL, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Show:
show := node
switch show.Type {
case sqlparser.ShowDatabasesStr:
// TODO: need to support like_or_where.
if qr, err = spanner.handleShowDatabases(session, query, node); err != nil {
log.Error("proxy.show.databases[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowStatusStr:
if qr, err = spanner.handleShowStatus(session, query, node); err != nil {
log.Error("proxy.show.status[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowVersionsStr:
if qr, err = spanner.handleShowVersions(session, query, node); err != nil {
log.Error("proxy.show.verions[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowEnginesStr:
if qr, err = spanner.handleShowEngines(session, query, node); err != nil {
log.Error("proxy.show.engines[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowTablesStr:
// Support for SHOW FULL TBALES which can be parsed used by Navicat
// TODO: need to support: SHOW [FULL] TABLES [FROM db_name] [like_or_where]
if qr, err = spanner.handleShowTables(session, query, node); err != nil {
log.Error("proxy.show.tables[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowCreateTableStr:
if qr, err = spanner.handleShowCreateTable(session, query, node); err != nil {
log.Error("proxy.show.create.table[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowColumnsStr:
if qr, err = spanner.handleShowColumns(session, query, node); err != nil {
log.Error("proxy.show.colomns[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowIndexStr:
if qr, err = spanner.handleShowIndex(session, query, node); err != nil {
log.Error("proxy.show.index[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowProcesslistStr:
if qr, err = spanner.handleShowProcesslist(session, query, node); err != nil {
log.Error("proxy.show.processlist[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowQueryzStr:
if qr, err = spanner.handleShowQueryz(session, query, node); err != nil {
log.Error("proxy.show.queryz[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowTxnzStr:
if qr, err = spanner.handleShowTxnz(session, query, node); err != nil {
log.Error("proxy.show.txnz[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowCreateDatabaseStr:
// Support for myloader.
if qr, err = spanner.handleShowCreateDatabase(session, query, node); err != nil {
log.Error("proxy.show.create.database[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowTableStatusStr:
// Support for Navicat.
// TODO: need to support like_or_where.
if qr, err = spanner.handleShowTableStatus(session, query, node); err != nil {
log.Error("proxy.show.table.status[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowWarningsStr, sqlparser.ShowVariablesStr:
// Support for JDBC.
if qr, err = spanner.handleJDBCShows(session, query, node); err != nil {
log.Error("proxy.JDBC.shows[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowCollationStr:
// Support for DBeaver.
if qr, err = spanner.handleShowCollation(session, query, node); err != nil {
log.Error("proxy.show.collation.status[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
case sqlparser.ShowCharsetStr:
// Support for DBeaver.
if qr, err = spanner.handleShowCharset(session, query, node); err != nil {
log.Error("proxy.show.charset.status[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
default:
log.Error("proxy.show.unsupported[%s].from.session[%v]", query, session.ID())
status = sqldb.ER_UNKNOWN_ERROR
err = sqldb.NewSQLErrorf(status, "unsupported.query:%v", query)
}
spanner.auditLog(session, R, xbase.SHOW, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Insert:
if qr, err = spanner.handleInsert(session, query, node); err != nil {
log.Error("proxy.insert[%s].from.session[%v].error:%+v", xbase.TruncateQuery(query, 256), session.ID(), err)
status = 1
}
switch node.Action {
case sqlparser.InsertStr:
spanner.auditLog(session, W, xbase.INSERT, query, qr, status)
case sqlparser.ReplaceStr:
spanner.auditLog(session, W, xbase.REPLACE, query, qr, status)
}
return returnQuery(qr, callback, err)
case *sqlparser.Delete:
if qr, err = spanner.handleDelete(session, query, node); err != nil {
log.Error("proxy.delete[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, W, xbase.DELETE, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Update:
if qr, err = spanner.handleUpdate(session, query, node); err != nil {
log.Error("proxy.update[%s].from.session[%v].error:%+v", xbase.TruncateQuery(query, 256), session.ID(), err)
status = 1
}
spanner.auditLog(session, W, xbase.UPDATE, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Select:
streamingFetch := false
txSession := spanner.sessions.getTxnSession(session)
if txSession.getStreamingFetchVar() {
streamingFetch = true
} else {
if len(node.Comments) > 0 {
comment := strings.Replace(common.BytesToString(node.Comments[0]), " ", "", -1)
if comment == "/*+streaming*/" {
streamingFetch = true
}
}
}
if streamingFetch {
if err = spanner.handleSelectStream(session, query, node, callback); err != nil {
log.Error("proxy.select.for.backup:[%s].error:%+v", xbase.TruncateQuery(query, 256), err)
return err
}
return nil
}
switch node.From[0].(type) {
case *sqlparser.AliasedTableExpr:
aliasTableExpr := node.From[0].(*sqlparser.AliasedTableExpr)
tb, ok := aliasTableExpr.Expr.(sqlparser.TableName)
if !ok {
// Subquery.
if qr, err = spanner.handleSelect(session, query, node); err != nil {
log.Error("proxy.select[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
} else {
if tb.Name.String() == "dual" {
// Select 1.
if qr, err = spanner.ExecuteSingle(query); err != nil {
log.Error("proxy.select[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
} else if spanner.router.IsSystemDB(tb.Qualifier.String()) {
// System database select.
if qr, err = spanner.handleSelectSystem(session, query, node); err != nil {
log.Error("proxy.select[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
} else {
// Normal select.
if qr, err = spanner.handleSelect(session, query, node); err != nil {
log.Error("proxy.select[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
}
}
spanner.auditLog(session, R, xbase.SELECT, query, qr, status)
return returnQuery(qr, callback, err)
default: // ParenTableExpr, JoinTableExpr
if qr, err = spanner.handleSelect(session, query, node); err != nil {
log.Error("proxy.select[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.SELECT, query, qr, status)
return returnQuery(qr, callback, err)
}
case *sqlparser.Union:
if qr, err = spanner.handleSelect(session, query, node); err != nil {
log.Error("proxy.union[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, W, xbase.UPDATE, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Kill:
if qr, err = spanner.handleKill(session, query, node); err != nil {
log.Error("proxy.kill[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.KILL, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Explain:
if qr, err = spanner.handleExplain(session, query, node); err != nil {
log.Error("proxy.explain[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.EXPLAIN, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Help:
if qr, err = spanner.handleHelp(session, query, node); err != nil {
log.Error("proxy.help[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.HELP, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Transaction:
// Support for myloader.
// Support Multiple-statement Transaction
if qr, err = spanner.handleMultiStmtTxn(session, query, node); err != nil {
log.Error("proxy.transaction[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.TRANSACTION, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Radon:
if qr, err = spanner.handleRadon(session, query, node); err != nil {
log.Error("proxy.admin[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.RADON, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Set:
log.Warning("proxy.query.set.query:%s", query)
if qr, err = spanner.handleSet(session, query, node); err != nil {
log.Error("proxy.set[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.SET, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Checksum:
log.Warning("proxy.query.checksum.query:%s", query)
if qr, err = spanner.handleChecksumTable(session, query, node); err != nil {
log.Error("proxy.checksum[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.CHECKSUM, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Optimize:
log.Warning("proxy.query.optimize.query:%s", query)
if qr, err = spanner.handleOptimizeTable(session, query, node); err != nil {
log.Error("proxy.optimize[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.OPTIMIZE, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Check:
log.Warning("proxy.query.check.query:%s", query)
if qr, err = spanner.handleCheckTable(session, query, node); err != nil {
log.Error("proxy.check[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.CHECK, query, qr, status)
return returnQuery(qr, callback, err)
case *sqlparser.Do:
log.Warning("proxy.query.do.query:%s", query)
if qr, err = spanner.handleDo(session, query, node); err != nil {
log.Error("proxy.do[%s].from.session[%v].error:%+v", query, session.ID(), err)
status = 1
}
spanner.auditLog(session, R, xbase.DO, query, qr, status)
return returnQuery(qr, callback, err)
default:
log.Error("proxy.unsupported[%s].from.session[%v]", query, session.ID())
status = sqldb.ER_UNKNOWN_ERROR
err = sqldb.NewSQLErrorf(status, "unsupported.query:%v", query)
spanner.auditLog(session, R, xbase.UNSUPPORT, query, qr, status)
return err
}
}
// IsDML returns the DML query or not.
func (spanner *Spanner) IsDML(node sqlparser.Statement) bool {
switch node.(type) {
case *sqlparser.Select, *sqlparser.Union, *sqlparser.Insert, *sqlparser.Delete, *sqlparser.Update:
return true
}
return false
}
// IsDMLWrite returns the DML write or not.
func (spanner *Spanner) IsDMLWrite(node sqlparser.Statement) bool {
switch node.(type) {
case *sqlparser.Insert, *sqlparser.Delete, *sqlparser.Update:
return true
}
return false
}
// IsDDL returns the DDL query or not.
func (spanner *Spanner) IsDDL(node sqlparser.Statement) bool {
switch node.(type) {
case *sqlparser.DDL:
return true
}
return false
}
// IsAdminCmd returns the Admin query or not.
// Some of admin commands are prohibited when radon is read-only.
func (spanner *Spanner) IsAdminCmd(node sqlparser.Statement) bool {
if node, ok := node.(*sqlparser.Radon); ok {
switch node.Action {
case sqlparser.AttachStr, sqlparser.DetachStr, sqlparser.ReshardStr, sqlparser.CleanupStr,
sqlparser.XACommitStr, sqlparser.XARollbackStr, sqlparser.RebalanceStr:
return true
}
}
return false
}
func queryStat(node sqlparser.Statement, timeStart time.Time, slowQueryTime time.Duration, err error) {
var command string
switch node.(type) {
case *sqlparser.Use:
command = "Use"
case *sqlparser.DDL:
command = "DDL"
case *sqlparser.Show:
command = "Show"
case *sqlparser.Insert:
command = "Insert"
case *sqlparser.Delete:
command = "Delete"
case *sqlparser.Update:
command = "Update"
case *sqlparser.Select:
command = "Select"
case *sqlparser.Union:
command = "Union"
case *sqlparser.Kill:
command = "Kill"
case *sqlparser.Explain:
command = "Explain"
case *sqlparser.Transaction:
command = "Transaction"
case *sqlparser.Set:
command = "Set"
default:
command = "Unsupport"
}
queryTime := time.Since(timeStart)
if err != nil {
if queryTime > slowQueryTime {
monitor.SlowQueryTotalCounterInc(command, "Error")
}
monitor.QueryTotalCounterInc(command, "Error")
} else {
if queryTime > slowQueryTime {
monitor.SlowQueryTotalCounterInc(command, "OK")
}
monitor.QueryTotalCounterInc(command, "OK")
}
}