[EXPERIMENTAL] Parallel VPlayer

.github/workflows/cluster_endtoend_onlineddl_vrepl_bench.yml

@@ -0,0 +1,180 @@
+# DO NOT MODIFY: THIS FILE IS GENERATED USING "make generate_ci_workflows"
+
+name: Cluster (onlineddl_vrepl_bench)
+on: [push, pull_request]
+concurrency:
+  group: format('{0}-{1}', ${{ github.ref }}, 'Cluster (onlineddl_vrepl_bench)')
+  cancel-in-progress: true
+
+permissions: read-all
+
+env:
+  LAUNCHABLE_ORGANIZATION: "vitess"
+  LAUNCHABLE_WORKSPACE: "vitess-app"
+  GITHUB_PR_HEAD_SHA: "${{ github.event.pull_request.head.sha }}"
+
+jobs:
+  build:
+    timeout-minutes: 60
+    name: Run endtoend tests on Cluster (onlineddl_vrepl_bench)
+    runs-on: gh-hosted-runners-16cores-1-24.04
+
+    steps:
+    - name: Skip CI
+      run: |
+        if [[ "${{contains( github.event.pull_request.labels.*.name, 'Skip CI')}}" == "true" ]]; then
+          echo "skipping CI due to the 'Skip CI' label"
+          exit 1
+        fi
+
+    - name: Check if workflow needs to be skipped
+      id: skip-workflow
+      run: |
+        skip='false'
+        if [[ "${{github.event.pull_request}}" ==  "" ]] && [[ "${{github.ref}}" != "refs/heads/main" ]] && [[ ! "${{github.ref}}" =~ ^refs/heads/release-[0-9]+\.[0-9]$ ]] && [[ ! "${{github.ref}}" =~ "refs/tags/.*" ]]; then
+          skip='true'
+        fi
+        echo Skip ${skip}
+        echo "skip-workflow=${skip}" >> $GITHUB_OUTPUT
+
+        PR_DATA=$(curl -s\
+          -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+          -H "Accept: application/vnd.github.v3+json" \
+          "https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}")
+        draft=$(echo "$PR_DATA" | jq .draft -r)
+        echo "is_draft=${draft}" >> $GITHUB_OUTPUT
+
+    - name: Check out code
+      if: steps.skip-workflow.outputs.skip-workflow == 'false'
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      with:
+        persist-credentials: 'false'
+
+    - name: Check for changes in relevant files
+      if: steps.skip-workflow.outputs.skip-workflow == 'false'
+      uses: dorny/paths-filter@ebc4d7e9ebcb0b1eb21480bb8f43113e996ac77a # v3.0.1
+      id: changes
+      with:
+        token: ''
+        filters: |
+          end_to_end:
+            - 'test/config.json'
+            - 'go/**/*.go'
+            - 'go/vt/sidecardb/**/*.sql'
+            - 'go/test/endtoend/onlineddl/vrepl_suite/**'
+            - 'test.go'
+            - 'Makefile'
+            - 'build.env'
+            - 'go.sum'
+            - 'go.mod'
+            - 'proto/*.proto'
+            - 'tools/**'
+            - 'config/**'
+            - 'bootstrap.sh'
+            - '.github/workflows/cluster_endtoend_onlineddl_vrepl_bench.yml'
+            - 'go/test/endtoend/onlineddl/vrepl_suite/testdata'
+
+    - name: Set up Go
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
+      with:
+        go-version-file: go.mod
+
+    - name: Set up python
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f # v5.1.1
+
+    - name: Tune the OS
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      run: |
+        # Limit local port range to not use ports that overlap with server side
+        # ports that we listen on.
+        sudo sysctl -w net.ipv4.ip_local_port_range="22768 65535"
+        # Increase the asynchronous non-blocking I/O. More information at https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html#sysvar_innodb_use_native_aio
+        echo "fs.aio-max-nr = 1048576" | sudo tee -a /etc/sysctl.conf
+        sudo sysctl -p /etc/sysctl.conf
+
+    - name: Get dependencies
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      timeout-minutes: 10
+      run: |
+
+        # Get key to latest MySQL repo
+        sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A8D3785C
+        # Setup MySQL 8.0
+        wget -c https://dev.mysql.com/get/mysql-apt-config_0.8.33-1_all.deb
+        echo mysql-apt-config mysql-apt-config/select-server select mysql-8.0 | sudo debconf-set-selections
+        sudo DEBIAN_FRONTEND="noninteractive" dpkg -i mysql-apt-config*
+        sudo apt-get -qq update
+
+        # We have to install this old version of libaio1 in case we end up testing with MySQL 5.7. See also:
+        # https://bugs.launchpad.net/ubuntu/+source/libaio/+bug/2067501
+        curl -L -O http://mirrors.kernel.org/ubuntu/pool/main/liba/libaio/libaio1_0.3.112-13build1_amd64.deb
+        sudo dpkg -i libaio1_0.3.112-13build1_amd64.deb
+        # libtinfo5 is also needed for older MySQL 5.7 builds.
+        curl -L -O http://mirrors.kernel.org/ubuntu/pool/universe/n/ncurses/libtinfo5_6.3-2ubuntu0.1_amd64.deb
+        sudo dpkg -i libtinfo5_6.3-2ubuntu0.1_amd64.deb
+
+        # Install everything else we need, and configure
+        sudo apt-get -qq install -y mysql-server mysql-shell mysql-client make unzip g++ etcd-client etcd-server curl git wget eatmydata xz-utils libncurses6
+
+        sudo service mysql stop
+        sudo service etcd stop
+        sudo ln -s /etc/apparmor.d/usr.sbin.mysqld /etc/apparmor.d/disable/
+        sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.mysqld
+        go mod download
+
+        # install JUnit report formatter
+        go install github.com/vitessio/go-junit-report@HEAD
+
+    - name: Setup launchable dependencies
+      if: steps.skip-workflow.outputs.is_draft == 'false' && steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true' && github.base_ref == 'main'
+      run: |
+        # Get Launchable CLI installed. If you can, make it a part of the builder image to speed things up
+        pip3 install --user launchable~=1.0 > /dev/null
+
+        # verify that launchable setup is all correct.
+        launchable verify || true
+
+        # Tell Launchable about the build you are producing and testing
+        launchable record build --name "$GITHUB_RUN_ID" --no-commit-collection --source .
+
+    - name: Run cluster endtoend test
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      timeout-minutes: 45
+      run: |
+        # We set the VTDATAROOT to the /tmp folder to reduce the file path of mysql.sock file
+        # which musn't be more than 107 characters long.
+        export VTDATAROOT="/tmp/"
+        source build.env
+
+        set -exo pipefail
+
+        cat <<-EOF>>./config/mycnf/mysql8026.cnf
+        binlog-transaction-compression=ON
+        EOF
+
+        cat <<-EOF>>./config/mycnf/mysql8026.cnf
+        binlog-row-value-options=PARTIAL_JSON
+        EOF
+
+        # run the tests however you normally do, then produce a JUnit XML file
+        eatmydata -- go run test.go -docker=false -follow -shard onlineddl_vrepl_bench | tee -a output.txt | go-junit-report -set-exit-code > report.xml
+
+    - name: Print test output and Record test result in launchable if PR is not a draft
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true' && always()
+      run: |
+        if [[ "${{steps.skip-workflow.outputs.is_draft}}" ==  "false" ]]; then
+          # send recorded tests to launchable
+          launchable record tests --build "$GITHUB_RUN_ID" go-test . || true
+        fi
+
+        # print test output
+        cat output.txt
+
+    - name: Test Summary
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true' && always()
+      uses: test-summary/action@31493c76ec9e7aa675f1585d3ed6f1da69269a86 # v2.4
+      with:
+        paths: "report.xml"
+        show: "fail"

config/mycnf/mysql8026.cnf

@@ -40,3 +40,9 @@ super-read-only
 # Replication parameters to ensure reparents are fast.
 replica_net_timeout = 8
 
+
+binlog_transaction_dependency_tracking=WRITESET
+slave_preserve_commit_order=ON
+slave_parallel_type=LOGICAL_CLOCK
+transaction_write_set_extraction=XXHASH64
+

go/mysql/binlog_event.go

@@ -111,7 +111,7 @@ type BinlogEvent interface {
 	// GTID returns the GTID from the event, and if this event
 	// also serves as a BEGIN statement.
 	// This is only valid if IsGTID() returns true.
-	GTID(BinlogFormat) (replication.GTID, bool, error)
+	GTID(BinlogFormat) (gtid replication.GTID, hasBegin bool, lastCommitted int64, sequenceNumber int64, err error)
 	// Query returns a Query struct representing data from a QUERY_EVENT.
 	// This is only valid if IsQuery() returns true.
 	Query(BinlogFormat) (Query, error)

go/mysql/binlog_event_filepos.go

@@ -40,8 +40,8 @@ func newFilePosBinlogEvent(buf []byte) *filePosBinlogEvent {
 	return &filePosBinlogEvent{binlogEvent: binlogEvent(buf)}
 }
 
-func (*filePosBinlogEvent) GTID(BinlogFormat) (replication.GTID, bool, error) {
-	return nil, false, nil
+func (*filePosBinlogEvent) GTID(BinlogFormat) (replication.GTID, bool, int64, int64, error) {
+	return nil, false, 0, 0, nil
 }
 
 // IsSemiSyncAckRequested implements BinlogEvent.IsSemiSyncAckRequested().
@@ -224,8 +224,8 @@ func (ev filePosFakeEvent) Format() (BinlogFormat, error) {
 	return BinlogFormat{}, nil
 }
 
-func (ev filePosFakeEvent) GTID(BinlogFormat) (replication.GTID, bool, error) {
-	return nil, false, nil
+func (ev filePosFakeEvent) GTID(BinlogFormat) (replication.GTID, bool, int64, int64, error) {
+	return nil, false, 0, 0, nil
 }
 
 func (ev filePosFakeEvent) Query(BinlogFormat) (Query, error) {
@@ -304,6 +304,6 @@ func (ev filePosGTIDEvent) StripChecksum(f BinlogFormat) (BinlogEvent, []byte, e
 	return ev, nil, nil
 }
 
-func (ev filePosGTIDEvent) GTID(BinlogFormat) (replication.GTID, bool, error) {
-	return ev.gtid, false, nil
+func (ev filePosGTIDEvent) GTID(BinlogFormat) (replication.GTID, bool, int64, int64, error) {
+	return ev.gtid, false, 0, 0, nil
 }

go/mysql/binlog_event_make_test.go

@@ -159,7 +159,7 @@ func TestMariadDBGTIDEVent(t *testing.T) {
 	event, _, err := event.StripChecksum(f)
 	require.NoError(t, err, "StripChecksum failed: %v", err)
 
-	gtid, hasBegin, err := event.GTID(f)
+	gtid, hasBegin, _, _, err := event.GTID(f)
 	require.NoError(t, err, "NewMariaDBGTIDEvent().GTID() returned error: %v", err)
 	require.True(t, hasBegin, "NewMariaDBGTIDEvent() didn't store hasBegin properly.")
 
@@ -178,7 +178,7 @@ func TestMariadDBGTIDEVent(t *testing.T) {
 	event, _, err = event.StripChecksum(f)
 	require.NoError(t, err, "StripChecksum failed: %v", err)
 
-	gtid, hasBegin, err = event.GTID(f)
+	gtid, hasBegin, _, _, err = event.GTID(f)
 	require.NoError(t, err, "NewMariaDBGTIDEvent().GTID() returned error: %v", err)
 	require.False(t, hasBegin, "NewMariaDBGTIDEvent() didn't store hasBegin properly.")
 

go/mysql/binlog_event_mariadb.go

@@ -60,17 +60,18 @@ func (ev mariadbBinlogEvent) IsGTID() bool {
 //	8         sequence number
 //	4         domain ID
 //	1         flags2
-func (ev mariadbBinlogEvent) GTID(f BinlogFormat) (replication.GTID, bool, error) {
+func (ev mariadbBinlogEvent) GTID(f BinlogFormat) (replication.GTID, bool, int64, int64, error) {
 	const FLStandalone = 1
 
 	data := ev.Bytes()[f.HeaderLength:]
 	flags2 := data[8+4]
 
-	return replication.MariadbGTID{
+	gtid := replication.MariadbGTID{
 		Sequence: binary.LittleEndian.Uint64(data[:8]),
 		Domain:   binary.LittleEndian.Uint32(data[8 : 8+4]),
 		Server:   ev.ServerID(),
-	}, flags2&FLStandalone == 0, nil
+	}
+	return gtid, flags2&FLStandalone == 0, 0, 0, nil
 }
 
 // PreviousGTIDs implements BinlogEvent.PreviousGTIDs().

go/mysql/binlog_event_mariadb_test.go

@@ -74,7 +74,7 @@ func TestMariadbNotBeginGTID(t *testing.T) {
 
 	input := mariadbBinlogEvent{binlogEvent: binlogEvent(mariadbStandaloneGTIDEvent)}
 	want := false
-	if _, got, err := input.GTID(f); got != want {
+	if _, got, _, _, err := input.GTID(f); got != want {
 		t.Errorf("%#v.GTID() = %v (%v), want %v", input, got, err, want)
 	}
 }
@@ -88,7 +88,7 @@ func TestMariadbIsBeginGTID(t *testing.T) {
 
 	input := mariadbBinlogEvent{binlogEvent: binlogEvent(mariadbBeginGTIDEvent)}
 	want := true
-	if _, got, err := input.GTID(f); got != want {
+	if _, got, _, _, err := input.GTID(f); got != want {
 		t.Errorf("%#v.IsBeginGTID() = %v (%v), want %v", input, got, err, want)
 	}
 }
@@ -102,7 +102,7 @@ func TestMariadbStandaloneBinlogEventGTID(t *testing.T) {
 
 	input := mariadbBinlogEvent{binlogEvent: binlogEvent(mariadbStandaloneGTIDEvent)}
 	want := replication.MariadbGTID{Domain: 0, Server: 62344, Sequence: 9}
-	got, hasBegin, err := input.GTID(f)
+	got, hasBegin, _, _, err := input.GTID(f)
 	assert.NoError(t, err, "unexpected error: %v", err)
 	assert.False(t, hasBegin, "unexpected hasBegin")
 	assert.True(t, reflect.DeepEqual(got, want), "%#v.GTID() = %#v, want %#v", input, got, want)
@@ -118,7 +118,7 @@ func TestMariadbBinlogEventGTID(t *testing.T) {
 
 	input := mariadbBinlogEvent{binlogEvent: binlogEvent(mariadbBeginGTIDEvent)}
 	want := replication.MariadbGTID{Domain: 0, Server: 62344, Sequence: 10}
-	got, hasBegin, err := input.GTID(f)
+	got, hasBegin, _, _, err := input.GTID(f)
 	assert.NoError(t, err, "unexpected error: %v", err)
 	assert.True(t, hasBegin, "unexpected !hasBegin")
 	assert.True(t, reflect.DeepEqual(got, want), "%#v.GTID() = %#v, want %#v", input, got, want)

go/mysql/binlog_event_mysql56.go

@@ -60,12 +60,27 @@ func (ev mysql56BinlogEvent) IsGTID() bool {
 //	1         flags
 //	16        SID (server UUID)
 //	8         GNO (sequence number, signed int)
-func (ev mysql56BinlogEvent) GTID(f BinlogFormat) (replication.GTID, bool, error) {
+//	1         lt_type
+//	8         last_committed
+//	8         sequence_number
+func (ev mysql56BinlogEvent) GTID(f BinlogFormat) (gtid replication.GTID, hasBegin bool, lastCommitted int64, sequenceNumber int64, err error) {
 	data := ev.Bytes()[f.HeaderLength:]
 	var sid replication.SID
-	copy(sid[:], data[1:1+16])
-	gno := int64(binary.LittleEndian.Uint64(data[1+16 : 1+16+8]))
-	return replication.Mysql56GTID{Server: sid, Sequence: gno}, false /* hasBegin */, nil
+	pos := 1
+	copy(sid[:], data[pos:pos+16])
+	pos += 16 // end of SID
+	gno := int64(binary.LittleEndian.Uint64(data[pos : pos+8]))
+	pos += 8 // end of GNO
+	pos += 1 // end of lt_type
+	if len(data) >= pos+8 {
+		lastCommitted = int64(binary.LittleEndian.Uint64(data[pos : pos+8]))
+	}
+	pos += 8 // end of last_committed
+	if len(data) >= pos+8 {
+		sequenceNumber = int64(binary.LittleEndian.Uint64(data[pos : pos+8]))
+	}
+	// pos += 8 // end of sequence_number
+	return replication.Mysql56GTID{Server: sid, Sequence: gno}, false /* hasBegin */, lastCommitted, sequenceNumber, nil
 }
 
 // PreviousGTIDs implements BinlogEvent.PreviousGTIDs().

go/mysql/binlog_event_mysql56_test.go

@@ -34,7 +34,7 @@ import (
 // Sample event data for MySQL 5.6.
 var (
 	mysql56FormatEvent             = NewMysql56BinlogEvent([]byte{0x78, 0x4e, 0x49, 0x55, 0xf, 0x64, 0x0, 0x0, 0x0, 0x74, 0x0, 0x0, 0x0, 0x78, 0x0, 0x0, 0x0, 0x1, 0x0, 0x4, 0x0, 0x35, 0x2e, 0x36, 0x2e, 0x32, 0x34, 0x2d, 0x6c, 0x6f, 0x67, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x78, 0x4e, 0x49, 0x55, 0x13, 0x38, 0xd, 0x0, 0x8, 0x0, 0x12, 0x0, 0x4, 0x4, 0x4, 0x4, 0x12, 0x0, 0x0, 0x5c, 0x0, 0x4, 0x1a, 0x8, 0x0, 0x0, 0x0, 0x8, 0x8, 0x8, 0x2, 0x0, 0x0, 0x0, 0xa, 0xa, 0xa, 0x19, 0x19, 0x0, 0x1, 0x18, 0x4a, 0xf, 0xca})
-	mysql56GTIDEvent               = NewMysql56BinlogEvent([]byte{0xff, 0x4e, 0x49, 0x55, 0x21, 0x64, 0x0, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0xf5, 0x2, 0x0, 0x0, 0x0, 0x0, 0x1, 0x43, 0x91, 0x92, 0xbd, 0xf3, 0x7c, 0x11, 0xe4, 0xbb, 0xeb, 0x2, 0x42, 0xac, 0x11, 0x3, 0x5a, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x48, 0x45, 0x82, 0x27})
+	mysql56GTIDEvent               = NewMysql56BinlogEvent([]byte{0xff, 0x4e, 0x49, 0x55, 0x21, 0x64, 0x0, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0xf5, 0x2, 0x0, 0x0, 0x0, 0x0, 0x1, 0x43, 0x91, 0x92, 0xbd, 0xf3, 0x7c, 0x11, 0xe4, 0xbb, 0xeb, 0x2, 0x42, 0xac, 0x11, 0x3, 0x5a, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 /* lt_type: */, 0x0 /* last_committed: */, 0x7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 /* sequence_number: */, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x48, 0x45, 0x82, 0x27})
 	mysql56QueryEvent              = NewMysql56BinlogEvent([]byte{0xff, 0x4e, 0x49, 0x55, 0x2, 0x64, 0x0, 0x0, 0x0, 0x77, 0x0, 0x0, 0x0, 0xdb, 0x3, 0x0, 0x0, 0x0, 0x0, 0x3d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x21, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6, 0x3, 0x73, 0x74, 0x64, 0x4, 0x8, 0x0, 0x8, 0x0, 0x21, 0x0, 0xc, 0x1, 0x74, 0x65, 0x73, 0x74, 0x0, 0x74, 0x65, 0x73, 0x74, 0x0, 0x69, 0x6e, 0x73, 0x65, 0x72, 0x74, 0x20, 0x69, 0x6e, 0x74, 0x6f, 0x20, 0x74, 0x65, 0x73, 0x74, 0x5f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x28, 0x6d, 0x73, 0x67, 0x29, 0x20, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x73, 0x20, 0x28, 0x27, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x27, 0x29, 0x92, 0x12, 0x79, 0xc3})
 	mysql56SemiSyncNoAckQueryEvent = NewMysql56BinlogEvent([]byte{0xef, 0x00, 0xff, 0x4e, 0x49, 0x55, 0x2, 0x64, 0x0, 0x0, 0x0, 0x77, 0x0, 0x0, 0x0, 0xdb, 0x3, 0x0, 0x0, 0x0, 0x0, 0x3d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x21, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6, 0x3, 0x73, 0x74, 0x64, 0x4, 0x8, 0x0, 0x8, 0x0, 0x21, 0x0, 0xc, 0x1, 0x74, 0x65, 0x73, 0x74, 0x0, 0x74, 0x65, 0x73, 0x74, 0x0, 0x69, 0x6e, 0x73, 0x65, 0x72, 0x74, 0x20, 0x69, 0x6e, 0x74, 0x6f, 0x20, 0x74, 0x65, 0x73, 0x74, 0x5f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x28, 0x6d, 0x73, 0x67, 0x29, 0x20, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x73, 0x20, 0x28, 0x27, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x27, 0x29, 0x92, 0x12, 0x79, 0xc3})
 	mysql56SemiSyncAckQueryEvent   = NewMysql56BinlogEvent([]byte{0xef, 0x01, 0xff, 0x4e, 0x49, 0x55, 0x2, 0x64, 0x0, 0x0, 0x0, 0x77, 0x0, 0x0, 0x0, 0xdb, 0x3, 0x0, 0x0, 0x0, 0x0, 0x3d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x0, 0x0, 0x21, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6, 0x3, 0x73, 0x74, 0x64, 0x4, 0x8, 0x0, 0x8, 0x0, 0x21, 0x0, 0xc, 0x1, 0x74, 0x65, 0x73, 0x74, 0x0, 0x74, 0x65, 0x73, 0x74, 0x0, 0x69, 0x6e, 0x73, 0x65, 0x72, 0x74, 0x20, 0x69, 0x6e, 0x74, 0x6f, 0x20, 0x74, 0x65, 0x73, 0x74, 0x5f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x28, 0x6d, 0x73, 0x67, 0x29, 0x20, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x73, 0x20, 0x28, 0x27, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x27, 0x29, 0x92, 0x12, 0x79, 0xc3})
@@ -90,10 +90,12 @@ func TestMysql56GTID(t *testing.T) {
 		Server:   replication.SID{0x43, 0x91, 0x92, 0xbd, 0xf3, 0x7c, 0x11, 0xe4, 0xbb, 0xeb, 0x2, 0x42, 0xac, 0x11, 0x3, 0x5a},
 		Sequence: 4,
 	}
-	got, hasBegin, err := input.GTID(format)
+	got, hasBegin, lastCommitted, sequenceNumber, err := input.GTID(format)
 	require.NoError(t, err, "GTID() error: %v", err)
 	assert.False(t, hasBegin, "GTID() returned hasBegin")
 	assert.Equal(t, want, got, "GTID() = %#v, want %#v", got, want)
+	assert.Equal(t, int64(7), lastCommitted)
+	assert.Equal(t, int64(9), sequenceNumber)
 }
 
 func TestMysql56DecodeTransactionPayload(t *testing.T) {

go/mysql/endtoend/replication_test.go

@@ -230,7 +230,7 @@ func TestRowReplicationWithRealDatabase(t *testing.T) {
 		switch {
 		case be.IsGTID():
 			// We expect one of these at least.
-			gtid, hasBegin, err := be.GTID(f)
+			gtid, hasBegin, _, _, err := be.GTID(f)
 			if err != nil {
 				t.Fatalf("GTID event is broken: %v", err)
 			}

go/mysql/replication/mysql56_gtid.go

@@ -94,8 +94,7 @@ func ParseSID(s string) (sid SID, err error) {
 type Mysql56GTID struct {
 	// Server is the SID of the server that originally committed the transaction.
 	Server SID
-	// Sequence is the sequence number of the transaction within a given Server's
-	// scope.
+	// Sequence is the sequence number of the transaction within a given Server's scope.
 	Sequence int64
 }