diff --git a/dlp/apiv2/dlppb/dlp.pb.go b/dlp/apiv2/dlppb/dlp.pb.go
index 53413ceb916b..c07832bc81ae 100755
--- a/dlp/apiv2/dlppb/dlp.pb.go
+++ b/dlp/apiv2/dlppb/dlp.pb.go
@@ -5325,9 +5325,9 @@ type RedactImageRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -5571,9 +5571,9 @@ type DeidentifyContentRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -5766,9 +5766,9 @@ type ReidentifyContentRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -5961,9 +5961,9 @@ type InspectContentRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -6966,7 +6966,7 @@ type ListInfoTypesRequest struct {
 	//
 	// The format of this value is as follows:
 	//
-	//	locations/<var>LOCATION_ID</var>
+	//	`locations/{location_id}`
 	Parent string `protobuf:"bytes,4,opt,name=parent,proto3" json:"parent,omitempty"`
 	// BCP-47 language code for localized infoType friendly
 	// names. If omitted, or if localized strings are not available,
@@ -9505,8 +9505,7 @@ type CryptoReplaceFfxFpeConfig_CustomAlphabet struct {
 	// This must be encoded as ASCII.
 	// The order of characters does not matter.
 	// The full list of allowed characters is:
-	// <code>0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
-	// ~`!@#$%^&*()_-+={[}]|\:;"'<,>.?/</code>
+	// “0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz~`!@#$%^&*()_-+={[}]|\:;"'<,>.?/“
 	CustomAlphabet string `protobuf:"bytes,5,opt,name=custom_alphabet,json=customAlphabet,proto3,oneof"`
 }
 
@@ -11716,13 +11715,13 @@ type CreateInspectTemplateRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//   - Organizations scope, location specified:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//   - Organizations scope, no location specified (defaults to global):
-	//     `organizations/`<var>ORG_ID</var>
+	//     `organizations/{org_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -11934,13 +11933,13 @@ type ListInspectTemplatesRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//   - Organizations scope, location specified:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//   - Organizations scope, no location specified (defaults to global):
-	//     `organizations/`<var>ORG_ID</var>
+	//     `organizations/{org_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -12162,9 +12161,9 @@ type CreateJobTriggerRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -12423,9 +12422,9 @@ type CreateDiscoveryConfigRequest struct {
 	// (project or organization):
 	//
 	//   - Projects scope:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Organizations scope:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -12622,7 +12621,7 @@ type ListDiscoveryConfigsRequest struct {
 	// Required. Parent resource name.
 	//
 	// The format of this value is as follows:
-	// `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	// `projects/{project_id}/locations/{location_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -12835,9 +12834,9 @@ type CreateDlpJobRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -12967,9 +12966,9 @@ type ListJobTriggersRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -16576,9 +16575,9 @@ type ListDlpJobsRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -16940,13 +16939,13 @@ type CreateDeidentifyTemplateRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//   - Organizations scope, location specified:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//   - Organizations scope, no location specified (defaults to global):
-	//     `organizations/`<var>ORG_ID</var>
+	//     `organizations/{org_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -17159,13 +17158,13 @@ type ListDeidentifyTemplatesRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//   - Organizations scope, location specified:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//   - Organizations scope, no location specified (defaults to global):
-	//     `organizations/`<var>ORG_ID</var>
+	//     `organizations/{org_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -17902,13 +17901,13 @@ type CreateStoredInfoTypeRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//   - Organizations scope, location specified:
-	//     `organizations/`<var>ORG_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `organizations/{org_id}/locations/{location_id}`
 	//   - Organizations scope, no location specified (defaults to global):
-	//     `organizations/`<var>ORG_ID</var>
+	//     `organizations/{org_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -18122,9 +18121,9 @@ type ListStoredInfoTypesRequest struct {
 	// location](https://cloud.google.com/sensitive-data-protection/docs/specifying-location):
 	//
 	//   - Projects scope, location specified:
-	//     `projects/`<var>PROJECT_ID</var>`/locations/`<var>LOCATION_ID</var>
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Projects scope, no location specified (defaults to global):
-	//     `projects/`<var>PROJECT_ID</var>
+	//     `projects/{project_id}`
 	//
 	// The following example `parent` string specifies a parent project with the
 	// identifier `example-project`, and specifies the `europe-west3` location
@@ -21240,9 +21239,9 @@ type CreateConnectionRequest struct {
 	// (project or organization):
 	//
 	//   - Projects scope:
-	//     `projects/PROJECT_ID/locations/LOCATION_ID`
+	//     `projects/{project_id}/locations/{location_id}`
 	//   - Organizations scope:
-	//     `organizations/ORG_ID/locations/LOCATION_ID`
+	//     `organizations/{org_id}/locations/{location_id}`
 	Parent string `protobuf:"bytes,1,opt,name=parent,proto3" json:"parent,omitempty"`
 	// Required. The connection resource.
 	Connection *Connection `protobuf:"bytes,2,opt,name=connection,proto3" json:"connection,omitempty"`
diff --git a/dlp/apiv2/dlppb/storage.pb.go b/dlp/apiv2/dlppb/storage.pb.go
index e38defd688f5..e4d0ff7056a0 100755
--- a/dlp/apiv2/dlppb/storage.pb.go
+++ b/dlp/apiv2/dlppb/storage.pb.go
@@ -2973,7 +2973,7 @@ type StorageConfig_TimespanConfig struct {
 	// Specification of the field containing the timestamp of scanned items.
 	// Used for data sources like Datastore and BigQuery.
 	//
-	// <b>For BigQuery</b>
+	// **For BigQuery**
 	//
 	// If this value is not specified and the table was modified between the
 	// given start and end times, the entire table will be scanned. If this
@@ -2988,13 +2988,11 @@ type StorageConfig_TimespanConfig struct {
 	// you can use any of the following pseudo-columns as your timestamp field.
 	// When used with Cloud DLP, these pseudo-column names are case sensitive.
 	//
-	// <ul>
-	// <li><code>_PARTITIONTIME</code></li>
-	// <li><code>_PARTITIONDATE</code></li>
-	// <li><code>_PARTITION_LOAD_TIME</code></li>
-	// </ul>
+	// - `_PARTITIONTIME`
+	// - `_PARTITIONDATE`
+	// - `_PARTITION_LOAD_TIME`
 	//
-	// <b>For Datastore</b>
+	// **For Datastore**
 	//
 	// If this value is specified, then entities are filtered based on the given
 	// start and end times. If an entity does not contain the provided timestamp
diff --git a/internal/generated/snippets/spanner/admin/database/apiv1/snippet_metadata.google.spanner.admin.database.v1.json b/internal/generated/snippets/spanner/admin/database/apiv1/snippet_metadata.google.spanner.admin.database.v1.json
index dd759c2bbf9a..98030c51bc3c 100644
--- a/internal/generated/snippets/spanner/admin/database/apiv1/snippet_metadata.google.spanner.admin.database.v1.json
+++ b/internal/generated/snippets/spanner/admin/database/apiv1/snippet_metadata.google.spanner.admin.database.v1.json
@@ -1,7 +1,7 @@
 {
   "clientLibrary": {
     "name": "cloud.google.com/go/spanner/admin/database/apiv1",
-    "version": "1.64.0",
+    "version": "1.65.0",
     "language": "GO",
     "apis": [
       {
diff --git a/internal/generated/snippets/spanner/admin/instance/apiv1/snippet_metadata.google.spanner.admin.instance.v1.json b/internal/generated/snippets/spanner/admin/instance/apiv1/snippet_metadata.google.spanner.admin.instance.v1.json
index 3a0d4db8ecbb..9c6232bfb000 100644
--- a/internal/generated/snippets/spanner/admin/instance/apiv1/snippet_metadata.google.spanner.admin.instance.v1.json
+++ b/internal/generated/snippets/spanner/admin/instance/apiv1/snippet_metadata.google.spanner.admin.instance.v1.json
@@ -1,7 +1,7 @@
 {
   "clientLibrary": {
     "name": "cloud.google.com/go/spanner/admin/instance/apiv1",
-    "version": "1.64.0",
+    "version": "1.65.0",
     "language": "GO",
     "apis": [
       {
diff --git a/internal/generated/snippets/spanner/apiv1/snippet_metadata.google.spanner.v1.json b/internal/generated/snippets/spanner/apiv1/snippet_metadata.google.spanner.v1.json
index 1782f98b6106..4d365a4cf38a 100644
--- a/internal/generated/snippets/spanner/apiv1/snippet_metadata.google.spanner.v1.json
+++ b/internal/generated/snippets/spanner/apiv1/snippet_metadata.google.spanner.v1.json
@@ -1,7 +1,7 @@
 {
   "clientLibrary": {
     "name": "cloud.google.com/go/spanner/apiv1",
-    "version": "1.64.0",
+    "version": "1.65.0",
     "language": "GO",
     "apis": [
       {
diff --git a/internal/generated/snippets/spanner/executor/apiv1/snippet_metadata.google.spanner.executor.v1.json b/internal/generated/snippets/spanner/executor/apiv1/snippet_metadata.google.spanner.executor.v1.json
index 74e7d49cef59..eab1bad2d191 100644
--- a/internal/generated/snippets/spanner/executor/apiv1/snippet_metadata.google.spanner.executor.v1.json
+++ b/internal/generated/snippets/spanner/executor/apiv1/snippet_metadata.google.spanner.executor.v1.json
@@ -1,7 +1,7 @@
 {
   "clientLibrary": {
     "name": "cloud.google.com/go/spanner/executor/apiv1",
-    "version": "1.64.0",
+    "version": "1.65.0",
     "language": "GO",
     "apis": [
       {
diff --git a/spanner/admin/database/apiv1/databasepb/backup.pb.go b/spanner/admin/database/apiv1/databasepb/backup.pb.go
index df6f5f7785e7..c7996dd4f0c7 100755
--- a/spanner/admin/database/apiv1/databasepb/backup.pb.go
+++ b/spanner/admin/database/apiv1/databasepb/backup.pb.go
@@ -269,6 +269,22 @@ type Backup struct {
 	CreateTime *timestamppb.Timestamp `protobuf:"bytes,4,opt,name=create_time,json=createTime,proto3" json:"create_time,omitempty"`
 	// Output only. Size of the backup in bytes.
 	SizeBytes int64 `protobuf:"varint,5,opt,name=size_bytes,json=sizeBytes,proto3" json:"size_bytes,omitempty"`
+	// Output only. The number of bytes that will be freed by deleting this
+	// backup. This value will be zero if, for example, this backup is part of an
+	// incremental backup chain and younger backups in the chain require that we
+	// keep its data. For backups not in an incremental backup chain, this is
+	// always the size of the backup. This value may change if backups on the same
+	// chain get created, deleted or expired.
+	FreeableSizeBytes int64 `protobuf:"varint,15,opt,name=freeable_size_bytes,json=freeableSizeBytes,proto3" json:"freeable_size_bytes,omitempty"`
+	// Output only. For a backup in an incremental backup chain, this is the
+	// storage space needed to keep the data that has changed since the previous
+	// backup. For all other backups, this is always the size of the backup. This
+	// value may change if backups on the same chain get deleted or expired.
+	//
+	// This field can be used to calculate the total storage space used by a set
+	// of backups. For example, the total space used by all backups of a database
+	// can be computed by summing up this field.
+	ExclusiveSizeBytes int64 `protobuf:"varint,16,opt,name=exclusive_size_bytes,json=exclusiveSizeBytes,proto3" json:"exclusive_size_bytes,omitempty"`
 	// Output only. The current state of the backup.
 	State Backup_State `protobuf:"varint,6,opt,name=state,proto3,enum=google.spanner.admin.database.v1.Backup_State" json:"state,omitempty"`
 	// Output only. The names of the restored databases that reference the backup.
@@ -314,6 +330,19 @@ type Backup struct {
 	// this backup. If collapsing is not done, then this field captures the
 	// single backup schedule URI associated with creating this backup.
 	BackupSchedules []string `protobuf:"bytes,14,rep,name=backup_schedules,json=backupSchedules,proto3" json:"backup_schedules,omitempty"`
+	// Output only. Populated only for backups in an incremental backup chain.
+	// Backups share the same chain id if and only if they belong to the same
+	// incremental backup chain. Use this field to determine which backups are
+	// part of the same incremental backup chain. The ordering of backups in the
+	// chain can be determined by ordering the backup `version_time`.
+	IncrementalBackupChainId string `protobuf:"bytes,17,opt,name=incremental_backup_chain_id,json=incrementalBackupChainId,proto3" json:"incremental_backup_chain_id,omitempty"`
+	// Output only. Data deleted at a time older than this is guaranteed not to be
+	// retained in order to support this backup. For a backup in an incremental
+	// backup chain, this is the version time of the oldest backup that exists or
+	// ever existed in the chain. For all other backups, this is the version time
+	// of the backup. This field can be used to understand what data is being
+	// retained by the backup system.
+	OldestVersionTime *timestamppb.Timestamp `protobuf:"bytes,18,opt,name=oldest_version_time,json=oldestVersionTime,proto3" json:"oldest_version_time,omitempty"`
 }
 
 func (x *Backup) Reset() {
@@ -390,6 +419,20 @@ func (x *Backup) GetSizeBytes() int64 {
 	return 0
 }
 
+func (x *Backup) GetFreeableSizeBytes() int64 {
+	if x != nil {
+		return x.FreeableSizeBytes
+	}
+	return 0
+}
+
+func (x *Backup) GetExclusiveSizeBytes() int64 {
+	if x != nil {
+		return x.ExclusiveSizeBytes
+	}
+	return 0
+}
+
 func (x *Backup) GetState() Backup_State {
 	if x != nil {
 		return x.State
@@ -446,6 +489,20 @@ func (x *Backup) GetBackupSchedules() []string {
 	return nil
 }
 
+func (x *Backup) GetIncrementalBackupChainId() string {
+	if x != nil {
+		return x.IncrementalBackupChainId
+	}
+	return ""
+}
+
+func (x *Backup) GetOldestVersionTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.OldestVersionTime
+	}
+	return nil
+}
+
 // The request for
 // [CreateBackup][google.spanner.admin.database.v1.DatabaseAdmin.CreateBackup].
 type CreateBackupRequest struct {
@@ -1686,6 +1743,50 @@ func (*FullBackupSpec) Descriptor() ([]byte, []int) {
 	return file_google_spanner_admin_database_v1_backup_proto_rawDescGZIP(), []int{15}
 }
 
+// The specification for incremental backup chains.
+// An incremental backup stores the delta of changes between a previous
+// backup and the database contents at a given version time. An
+// incremental backup chain consists of a full backup and zero or more
+// successive incremental backups. The first backup created for an
+// incremental backup chain is always a full backup.
+type IncrementalBackupSpec struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *IncrementalBackupSpec) Reset() {
+	*x = IncrementalBackupSpec{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_spanner_admin_database_v1_backup_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *IncrementalBackupSpec) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*IncrementalBackupSpec) ProtoMessage() {}
+
+func (x *IncrementalBackupSpec) ProtoReflect() protoreflect.Message {
+	mi := &file_google_spanner_admin_database_v1_backup_proto_msgTypes[16]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use IncrementalBackupSpec.ProtoReflect.Descriptor instead.
+func (*IncrementalBackupSpec) Descriptor() ([]byte, []int) {
+	return file_google_spanner_admin_database_v1_backup_proto_rawDescGZIP(), []int{16}
+}
+
 var File_google_spanner_admin_database_v1_backup_proto protoreflect.FileDescriptor
 
 var file_google_spanner_admin_database_v1_backup_proto_rawDesc = []byte{
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+	0x46, 0x41, 0x55, 0x4c, 0x54, 0x5f, 0x45, 0x4e, 0x43, 0x52, 0x59, 0x50, 0x54, 0x49, 0x4f, 0x4e,
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+	0x41, 0x4e, 0x41, 0x47, 0x45, 0x44, 0x5f, 0x45, 0x4e, 0x43, 0x52, 0x59, 0x50, 0x54, 0x49, 0x4f,
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+	0x61, 0x6e, 0x6e, 0x65, 0x72, 0x2e, 0x41, 0x64, 0x6d, 0x69, 0x6e, 0x2e, 0x44, 0x61, 0x74, 0x61,
+	0x62, 0x61, 0x73, 0x65, 0x2e, 0x56, 0x31, 0xca, 0x02, 0x26, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
+	0x5c, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x5c, 0x53, 0x70, 0x61, 0x6e, 0x6e, 0x65, 0x72, 0x5c, 0x41,
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+	0xea, 0x02, 0x2b, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x3a, 0x3a, 0x43, 0x6c, 0x6f, 0x75, 0x64,
+	0x3a, 0x3a, 0x53, 0x70, 0x61, 0x6e, 0x6e, 0x65, 0x72, 0x3a, 0x3a, 0x41, 0x64, 0x6d, 0x69, 0x6e,
+	0x3a, 0x3a, 0x44, 0x61, 0x74, 0x61, 0x62, 0x61, 0x73, 0x65, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -2026,7 +2145,7 @@ func file_google_spanner_admin_database_v1_backup_proto_rawDescGZIP() []byte {
 }
 
 var file_google_spanner_admin_database_v1_backup_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_google_spanner_admin_database_v1_backup_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
+var file_google_spanner_admin_database_v1_backup_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
 var file_google_spanner_admin_database_v1_backup_proto_goTypes = []any{
 	(Backup_State)(0), // 0: google.spanner.admin.database.v1.Backup.State
 	(CreateBackupEncryptionConfig_EncryptionType)(0), // 1: google.spanner.admin.database.v1.CreateBackupEncryptionConfig.EncryptionType
@@ -2047,43 +2166,45 @@ var file_google_spanner_admin_database_v1_backup_proto_goTypes = []any{
 	(*CreateBackupEncryptionConfig)(nil), // 16: google.spanner.admin.database.v1.CreateBackupEncryptionConfig
 	(*CopyBackupEncryptionConfig)(nil),   // 17: google.spanner.admin.database.v1.CopyBackupEncryptionConfig
 	(*FullBackupSpec)(nil),               // 18: google.spanner.admin.database.v1.FullBackupSpec
-	(*timestamppb.Timestamp)(nil),        // 19: google.protobuf.Timestamp
-	(*EncryptionInfo)(nil),               // 20: google.spanner.admin.database.v1.EncryptionInfo
-	(DatabaseDialect)(0),                 // 21: google.spanner.admin.database.v1.DatabaseDialect
-	(*OperationProgress)(nil),            // 22: google.spanner.admin.database.v1.OperationProgress
-	(*fieldmaskpb.FieldMask)(nil),        // 23: google.protobuf.FieldMask
-	(*longrunningpb.Operation)(nil),      // 24: google.longrunning.Operation
+	(*IncrementalBackupSpec)(nil),        // 19: google.spanner.admin.database.v1.IncrementalBackupSpec
+	(*timestamppb.Timestamp)(nil),        // 20: google.protobuf.Timestamp
+	(*EncryptionInfo)(nil),               // 21: google.spanner.admin.database.v1.EncryptionInfo
+	(DatabaseDialect)(0),                 // 22: google.spanner.admin.database.v1.DatabaseDialect
+	(*OperationProgress)(nil),            // 23: google.spanner.admin.database.v1.OperationProgress
+	(*fieldmaskpb.FieldMask)(nil),        // 24: google.protobuf.FieldMask
+	(*longrunningpb.Operation)(nil),      // 25: google.longrunning.Operation
 }
 var file_google_spanner_admin_database_v1_backup_proto_depIdxs = []int32{
-	19, // 0: google.spanner.admin.database.v1.Backup.version_time:type_name -> google.protobuf.Timestamp
-	19, // 1: google.spanner.admin.database.v1.Backup.expire_time:type_name -> google.protobuf.Timestamp
-	19, // 2: google.spanner.admin.database.v1.Backup.create_time:type_name -> google.protobuf.Timestamp
+	20, // 0: google.spanner.admin.database.v1.Backup.version_time:type_name -> google.protobuf.Timestamp
+	20, // 1: google.spanner.admin.database.v1.Backup.expire_time:type_name -> google.protobuf.Timestamp
+	20, // 2: google.spanner.admin.database.v1.Backup.create_time:type_name -> google.protobuf.Timestamp
 	0,  // 3: google.spanner.admin.database.v1.Backup.state:type_name -> google.spanner.admin.database.v1.Backup.State
-	20, // 4: google.spanner.admin.database.v1.Backup.encryption_info:type_name -> google.spanner.admin.database.v1.EncryptionInfo
-	20, // 5: google.spanner.admin.database.v1.Backup.encryption_information:type_name -> google.spanner.admin.database.v1.EncryptionInfo
-	21, // 6: google.spanner.admin.database.v1.Backup.database_dialect:type_name -> google.spanner.admin.database.v1.DatabaseDialect
-	19, // 7: google.spanner.admin.database.v1.Backup.max_expire_time:type_name -> google.protobuf.Timestamp
-	3,  // 8: google.spanner.admin.database.v1.CreateBackupRequest.backup:type_name -> google.spanner.admin.database.v1.Backup
-	16, // 9: google.spanner.admin.database.v1.CreateBackupRequest.encryption_config:type_name -> google.spanner.admin.database.v1.CreateBackupEncryptionConfig
-	22, // 10: google.spanner.admin.database.v1.CreateBackupMetadata.progress:type_name -> google.spanner.admin.database.v1.OperationProgress
-	19, // 11: google.spanner.admin.database.v1.CreateBackupMetadata.cancel_time:type_name -> google.protobuf.Timestamp
-	19, // 12: google.spanner.admin.database.v1.CopyBackupRequest.expire_time:type_name -> google.protobuf.Timestamp
-	17, // 13: google.spanner.admin.database.v1.CopyBackupRequest.encryption_config:type_name -> google.spanner.admin.database.v1.CopyBackupEncryptionConfig
-	22, // 14: google.spanner.admin.database.v1.CopyBackupMetadata.progress:type_name -> google.spanner.admin.database.v1.OperationProgress
-	19, // 15: google.spanner.admin.database.v1.CopyBackupMetadata.cancel_time:type_name -> google.protobuf.Timestamp
-	3,  // 16: google.spanner.admin.database.v1.UpdateBackupRequest.backup:type_name -> google.spanner.admin.database.v1.Backup
-	23, // 17: google.spanner.admin.database.v1.UpdateBackupRequest.update_mask:type_name -> google.protobuf.FieldMask
-	3,  // 18: google.spanner.admin.database.v1.ListBackupsResponse.backups:type_name -> google.spanner.admin.database.v1.Backup
-	24, // 19: google.spanner.admin.database.v1.ListBackupOperationsResponse.operations:type_name -> google.longrunning.Operation
-	19, // 20: google.spanner.admin.database.v1.BackupInfo.version_time:type_name -> google.protobuf.Timestamp
-	19, // 21: google.spanner.admin.database.v1.BackupInfo.create_time:type_name -> google.protobuf.Timestamp
-	1,  // 22: google.spanner.admin.database.v1.CreateBackupEncryptionConfig.encryption_type:type_name -> google.spanner.admin.database.v1.CreateBackupEncryptionConfig.EncryptionType
-	2,  // 23: google.spanner.admin.database.v1.CopyBackupEncryptionConfig.encryption_type:type_name -> google.spanner.admin.database.v1.CopyBackupEncryptionConfig.EncryptionType
-	24, // [24:24] is the sub-list for method output_type
-	24, // [24:24] is the sub-list for method input_type
-	24, // [24:24] is the sub-list for extension type_name
-	24, // [24:24] is the sub-list for extension extendee
-	0,  // [0:24] is the sub-list for field type_name
+	21, // 4: google.spanner.admin.database.v1.Backup.encryption_info:type_name -> google.spanner.admin.database.v1.EncryptionInfo
+	21, // 5: google.spanner.admin.database.v1.Backup.encryption_information:type_name -> google.spanner.admin.database.v1.EncryptionInfo
+	22, // 6: google.spanner.admin.database.v1.Backup.database_dialect:type_name -> google.spanner.admin.database.v1.DatabaseDialect
+	20, // 7: google.spanner.admin.database.v1.Backup.max_expire_time:type_name -> google.protobuf.Timestamp
+	20, // 8: google.spanner.admin.database.v1.Backup.oldest_version_time:type_name -> google.protobuf.Timestamp
+	3,  // 9: google.spanner.admin.database.v1.CreateBackupRequest.backup:type_name -> google.spanner.admin.database.v1.Backup
+	16, // 10: google.spanner.admin.database.v1.CreateBackupRequest.encryption_config:type_name -> google.spanner.admin.database.v1.CreateBackupEncryptionConfig
+	23, // 11: google.spanner.admin.database.v1.CreateBackupMetadata.progress:type_name -> google.spanner.admin.database.v1.OperationProgress
+	20, // 12: google.spanner.admin.database.v1.CreateBackupMetadata.cancel_time:type_name -> google.protobuf.Timestamp
+	20, // 13: google.spanner.admin.database.v1.CopyBackupRequest.expire_time:type_name -> google.protobuf.Timestamp
+	17, // 14: google.spanner.admin.database.v1.CopyBackupRequest.encryption_config:type_name -> google.spanner.admin.database.v1.CopyBackupEncryptionConfig
+	23, // 15: google.spanner.admin.database.v1.CopyBackupMetadata.progress:type_name -> google.spanner.admin.database.v1.OperationProgress
+	20, // 16: google.spanner.admin.database.v1.CopyBackupMetadata.cancel_time:type_name -> google.protobuf.Timestamp
+	3,  // 17: google.spanner.admin.database.v1.UpdateBackupRequest.backup:type_name -> google.spanner.admin.database.v1.Backup
+	24, // 18: google.spanner.admin.database.v1.UpdateBackupRequest.update_mask:type_name -> google.protobuf.FieldMask
+	3,  // 19: google.spanner.admin.database.v1.ListBackupsResponse.backups:type_name -> google.spanner.admin.database.v1.Backup
+	25, // 20: google.spanner.admin.database.v1.ListBackupOperationsResponse.operations:type_name -> google.longrunning.Operation
+	20, // 21: google.spanner.admin.database.v1.BackupInfo.version_time:type_name -> google.protobuf.Timestamp
+	20, // 22: google.spanner.admin.database.v1.BackupInfo.create_time:type_name -> google.protobuf.Timestamp
+	1,  // 23: google.spanner.admin.database.v1.CreateBackupEncryptionConfig.encryption_type:type_name -> google.spanner.admin.database.v1.CreateBackupEncryptionConfig.EncryptionType
+	2,  // 24: google.spanner.admin.database.v1.CopyBackupEncryptionConfig.encryption_type:type_name -> google.spanner.admin.database.v1.CopyBackupEncryptionConfig.EncryptionType
+	25, // [25:25] is the sub-list for method output_type
+	25, // [25:25] is the sub-list for method input_type
+	25, // [25:25] is the sub-list for extension type_name
+	25, // [25:25] is the sub-list for extension extendee
+	0,  // [0:25] is the sub-list for field type_name
 }
 
 func init() { file_google_spanner_admin_database_v1_backup_proto_init() }
@@ -2285,6 +2406,18 @@ func file_google_spanner_admin_database_v1_backup_proto_init() {
 				return nil
 			}
 		}
+		file_google_spanner_admin_database_v1_backup_proto_msgTypes[16].Exporter = func(v any, i int) any {
+			switch v := v.(*IncrementalBackupSpec); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -2292,7 +2425,7 @@ func file_google_spanner_admin_database_v1_backup_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_google_spanner_admin_database_v1_backup_proto_rawDesc,
 			NumEnums:      3,
-			NumMessages:   16,
+			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/spanner/admin/database/apiv1/databasepb/backup_schedule.pb.go b/spanner/admin/database/apiv1/databasepb/backup_schedule.pb.go
index 95a45bb0eec8..fd7ca6b0dc38 100755
--- a/spanner/admin/database/apiv1/databasepb/backup_schedule.pb.go
+++ b/spanner/admin/database/apiv1/databasepb/backup_schedule.pb.go
@@ -145,6 +145,7 @@ type BackupSchedule struct {
 	// Types that are assignable to BackupTypeSpec:
 	//
 	//	*BackupSchedule_FullBackupSpec
+	//	*BackupSchedule_IncrementalBackupSpec
 	BackupTypeSpec isBackupSchedule_BackupTypeSpec `protobuf_oneof:"backup_type_spec"`
 	// Output only. The timestamp at which the schedule was last updated.
 	// If the schedule has never been updated, this field contains the timestamp
@@ -226,6 +227,13 @@ func (x *BackupSchedule) GetFullBackupSpec() *FullBackupSpec {
 	return nil
 }
 
+func (x *BackupSchedule) GetIncrementalBackupSpec() *IncrementalBackupSpec {
+	if x, ok := x.GetBackupTypeSpec().(*BackupSchedule_IncrementalBackupSpec); ok {
+		return x.IncrementalBackupSpec
+	}
+	return nil
+}
+
 func (x *BackupSchedule) GetUpdateTime() *timestamppb.Timestamp {
 	if x != nil {
 		return x.UpdateTime
@@ -242,8 +250,15 @@ type BackupSchedule_FullBackupSpec struct {
 	FullBackupSpec *FullBackupSpec `protobuf:"bytes,7,opt,name=full_backup_spec,json=fullBackupSpec,proto3,oneof"`
 }
 
+type BackupSchedule_IncrementalBackupSpec struct {
+	// The schedule creates incremental backup chains.
+	IncrementalBackupSpec *IncrementalBackupSpec `protobuf:"bytes,8,opt,name=incremental_backup_spec,json=incrementalBackupSpec,proto3,oneof"`
+}
+
 func (*BackupSchedule_FullBackupSpec) isBackupSchedule_BackupTypeSpec() {}
 
+func (*BackupSchedule_IncrementalBackupSpec) isBackupSchedule_BackupTypeSpec() {}
+
 // CrontabSpec can be used to specify the version time and frequency at
 // which the backup should be created.
 type CrontabSpec struct {
@@ -733,7 +748,7 @@ var file_google_spanner_admin_database_v1_backup_schedule_proto_rawDesc = []byte
 	0x65, 0x72, 0x2e, 0x61, 0x64, 0x6d, 0x69, 0x6e, 0x2e, 0x64, 0x61, 0x74, 0x61, 0x62, 0x61, 0x73,
 	0x65, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x72, 0x6f, 0x6e, 0x74, 0x61, 0x62, 0x53, 0x70, 0x65, 0x63,
 	0x48, 0x00, 0x52, 0x08, 0x63, 0x72, 0x6f, 0x6e, 0x53, 0x70, 0x65, 0x63, 0x42, 0x0f, 0x0a, 0x0d,
-	0x73, 0x63, 0x68, 0x65, 0x64, 0x75, 0x6c, 0x65, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x22, 0x95, 0x05,
+	0x73, 0x63, 0x68, 0x65, 0x64, 0x75, 0x6c, 0x65, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x22, 0x88, 0x06,
 	0x0a, 0x0e, 0x42, 0x61, 0x63, 0x6b, 0x75, 0x70, 0x53, 0x63, 0x68, 0x65, 0x64, 0x75, 0x6c, 0x65,
 	0x12, 0x17, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x42, 0x03,
 	0xe0, 0x41, 0x08, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x4d, 0x0a, 0x04, 0x73, 0x70, 0x65,
@@ -759,109 +774,116 @@ var file_google_spanner_admin_database_v1_backup_schedule_proto_rawDesc = []byte
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 }
 
 var (
@@ -890,8 +912,9 @@ var file_google_spanner_admin_database_v1_backup_schedule_proto_goTypes = []any{
 	(*durationpb.Duration)(nil),          // 9: google.protobuf.Duration
 	(*CreateBackupEncryptionConfig)(nil), // 10: google.spanner.admin.database.v1.CreateBackupEncryptionConfig
 	(*FullBackupSpec)(nil),               // 11: google.spanner.admin.database.v1.FullBackupSpec
-	(*timestamppb.Timestamp)(nil),        // 12: google.protobuf.Timestamp
-	(*fieldmaskpb.FieldMask)(nil),        // 13: google.protobuf.FieldMask
+	(*IncrementalBackupSpec)(nil),        // 12: google.spanner.admin.database.v1.IncrementalBackupSpec
+	(*timestamppb.Timestamp)(nil),        // 13: google.protobuf.Timestamp
+	(*fieldmaskpb.FieldMask)(nil),        // 14: google.protobuf.FieldMask
 }
 var file_google_spanner_admin_database_v1_backup_schedule_proto_depIdxs = []int32{
 	2,  // 0: google.spanner.admin.database.v1.BackupScheduleSpec.cron_spec:type_name -> google.spanner.admin.database.v1.CrontabSpec
@@ -899,17 +922,18 @@ var file_google_spanner_admin_database_v1_backup_schedule_proto_depIdxs = []int3
 	9,  // 2: google.spanner.admin.database.v1.BackupSchedule.retention_duration:type_name -> google.protobuf.Duration
 	10, // 3: google.spanner.admin.database.v1.BackupSchedule.encryption_config:type_name -> google.spanner.admin.database.v1.CreateBackupEncryptionConfig
 	11, // 4: google.spanner.admin.database.v1.BackupSchedule.full_backup_spec:type_name -> google.spanner.admin.database.v1.FullBackupSpec
-	12, // 5: google.spanner.admin.database.v1.BackupSchedule.update_time:type_name -> google.protobuf.Timestamp
-	9,  // 6: google.spanner.admin.database.v1.CrontabSpec.creation_window:type_name -> google.protobuf.Duration
-	1,  // 7: google.spanner.admin.database.v1.CreateBackupScheduleRequest.backup_schedule:type_name -> google.spanner.admin.database.v1.BackupSchedule
-	1,  // 8: google.spanner.admin.database.v1.ListBackupSchedulesResponse.backup_schedules:type_name -> google.spanner.admin.database.v1.BackupSchedule
-	1,  // 9: google.spanner.admin.database.v1.UpdateBackupScheduleRequest.backup_schedule:type_name -> google.spanner.admin.database.v1.BackupSchedule
-	13, // 10: google.spanner.admin.database.v1.UpdateBackupScheduleRequest.update_mask:type_name -> google.protobuf.FieldMask
-	11, // [11:11] is the sub-list for method output_type
-	11, // [11:11] is the sub-list for method input_type
-	11, // [11:11] is the sub-list for extension type_name
-	11, // [11:11] is the sub-list for extension extendee
-	0,  // [0:11] is the sub-list for field type_name
+	12, // 5: google.spanner.admin.database.v1.BackupSchedule.incremental_backup_spec:type_name -> google.spanner.admin.database.v1.IncrementalBackupSpec
+	13, // 6: google.spanner.admin.database.v1.BackupSchedule.update_time:type_name -> google.protobuf.Timestamp
+	9,  // 7: google.spanner.admin.database.v1.CrontabSpec.creation_window:type_name -> google.protobuf.Duration
+	1,  // 8: google.spanner.admin.database.v1.CreateBackupScheduleRequest.backup_schedule:type_name -> google.spanner.admin.database.v1.BackupSchedule
+	1,  // 9: google.spanner.admin.database.v1.ListBackupSchedulesResponse.backup_schedules:type_name -> google.spanner.admin.database.v1.BackupSchedule
+	1,  // 10: google.spanner.admin.database.v1.UpdateBackupScheduleRequest.backup_schedule:type_name -> google.spanner.admin.database.v1.BackupSchedule
+	14, // 11: google.spanner.admin.database.v1.UpdateBackupScheduleRequest.update_mask:type_name -> google.protobuf.FieldMask
+	12, // [12:12] is the sub-list for method output_type
+	12, // [12:12] is the sub-list for method input_type
+	12, // [12:12] is the sub-list for extension type_name
+	12, // [12:12] is the sub-list for extension extendee
+	0,  // [0:12] is the sub-list for field type_name
 }
 
 func init() { file_google_spanner_admin_database_v1_backup_schedule_proto_init() }
@@ -1033,6 +1057,7 @@ func file_google_spanner_admin_database_v1_backup_schedule_proto_init() {
 	}
 	file_google_spanner_admin_database_v1_backup_schedule_proto_msgTypes[1].OneofWrappers = []any{
 		(*BackupSchedule_FullBackupSpec)(nil),
+		(*BackupSchedule_IncrementalBackupSpec)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{