Removing unused SessionParams attributes.

The python code only uses Keyspace and Shard.
That also allows me to remove KeyRange from dbconfigs,
was only used to validate against the connection params.
(the other one, Dbname, is used in other places).

go/vt/dbconfigs/dbconfigs.go

@@ -13,7 +13,6 @@ import (
 	log "github.com/golang/glog"
 	"github.com/youtube/vitess/go/jscfg"
 	"github.com/youtube/vitess/go/mysql"
-	"github.com/youtube/vitess/go/vt/key"
 )
 
 // Offer a sample config - probably should load this when file isn't set.
@@ -47,7 +46,6 @@ type DBConfig struct {
 	UnixSocket string `json:"unix_socket"`
 	Charset    string `json:"charset"`
 	Memcache   string `json:"memcache"`
-	KeyRange   key.KeyRange `json:"keyrange"`
 	Keyspace   string `json:"keyspace"`
 	Shard      string `json:"shard"`
 }

go/vt/dbconfigs/dbconfigs_test.go

@@ -1,31 +0,0 @@
-// Copyright 2013, Google Inc. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package dbconfigs
-
-import (
-	"encoding/json"
-	"testing"
-)
-
-func TestDbConfigLoad(t *testing.T) {
-
-	data := "{\n" +
-		"  \"keyrange\": {\n" +
-		"    \"Start\": \"4000\",\n" +
-		"    \"End\": \"8000\"\n" +
-		"  }\n" +
-		"}"
-
-	val := &DBConfig{}
-	if err := json.Unmarshal([]byte(data), val); err != nil {
-		t.Errorf("json.Unmarshal error: %v", err)
-	}
-	if string(val.KeyRange.Start.Hex()) != "4000" {
-		t.Errorf("Invalid Start: %v", val.KeyRange.Start.Hex())
-	}
-	if string(val.KeyRange.End.Hex()) != "8000" {
-		t.Errorf("Invalid End: %v", val.KeyRange.End.Hex())
-	}
-}

go/vt/tabletserver/proto/structs.go

@@ -6,12 +6,9 @@ package proto
 
 import (
 	mproto "github.com/youtube/vitess/go/mysql/proto"
-	"github.com/youtube/vitess/go/vt/key"
 )
 
 type SessionParams struct {
-	DbName   string
-	KeyRange key.KeyRange
 	Keyspace string
 	Shard    string
 }

go/vt/tabletserver/sqlquery.go

@@ -218,21 +218,12 @@ func (sq *SqlQuery) checkState(sessionId int64, allowShutdown bool) {
 }
 
 func (sq *SqlQuery) GetSessionId(sessionParams *proto.SessionParams, sessionInfo *proto.SessionInfo) error {
-	if sessionParams.DbName == "" {
 	if sessionParams.Keyspace != sq.dbconfig.Keyspace {
 		return NewTabletError(FATAL, "Keyspace mismatch, expecting %v, received %v", sq.dbconfig.Keyspace, sessionParams.Keyspace)
 	}
 	if sessionParams.Shard != sq.dbconfig.Shard {
 		return NewTabletError(FATAL, "Shard mismatch, expecting %v, received %v", sq.dbconfig.Shard, sessionParams.Shard)
 	}
-	} else {
-		if sessionParams.DbName != sq.dbconfig.Dbname {
-			return NewTabletError(FATAL, "db name mismatch, expecting %v, received %v", sq.dbconfig.Dbname, sessionParams.DbName)
-		}
-		if sessionParams.KeyRange != sq.dbconfig.KeyRange {
-			return NewTabletError(FATAL, "KeyRange mismatch, expecting %v, received %v", sq.dbconfig.KeyRange.String(), sessionParams.KeyRange.String())
-		}
-	}
 	sessionInfo.SessionId = sq.sessionId
 	return nil
 }

go/vt/vttablet/agent.go

@@ -80,7 +80,6 @@ func InitAgent(
 			if dbcfgs.App.Dbname == "" {
 				dbcfgs.App.Dbname = newTablet.DbName()
 			}
-			dbcfgs.App.KeyRange = newTablet.KeyRange
 			dbcfgs.App.Keyspace = newTablet.Keyspace
 			dbcfgs.App.Shard = newTablet.Shard
 			// Transitioning from replica to master, first disconnect
@@ -90,10 +89,10 @@ func InitAgent(
 				ts.DisallowQueries(false)
 			}
 			qrs := ts.LoadCustomRules()
-			if dbcfgs.App.KeyRange.IsPartial() {
+			if newTablet.KeyRange.IsPartial() {
 				qr := ts.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", ts.QR_FAIL_QUERY)
 				qr.AddPlanCond(sqlparser.PLAN_INSERT_PK)
-				err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, dbcfgs.App.KeyRange)
+				err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, newTablet.KeyRange)
 				if err != nil {
 					log.Warningf("Unable to add keyspace rule: %v", err)
 				} else {