diff --git a/Bigtable/metadata/Admin/V2/Table.php b/Bigtable/metadata/Admin/V2/Table.php
index ff6a09730acf..20724e817c57 100644
--- a/Bigtable/metadata/Admin/V2/Table.php
+++ b/Bigtable/metadata/Admin/V2/Table.php
@@ -21,7 +21,7 @@ public static function initOnce() {
         \GPBMetadata\Google\Protobuf\Timestamp::initOnce();
         \GPBMetadata\Google\Rpc\Status::initOnce();
         $pool->internalAddGeneratedFile(
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\x01(\x09\"5\x0A\x05State\x12\x13\x0A\x0FSTATE_NOT_KNOWN\x10\x00\x12\x09\x0A\x05READY\x10\x01\x12\x0C\x0A\x08CREATING\x10\x02:{\xEAAx\x0A%bigtableadmin.googleapis.com/Snapshot\x12Oprojects/{project}/instances/{instance}/clusters/{cluster}/snapshots/{snapshot}\"\xF9\x05\x0A\x06Backup\x12\x0C\x0A\x04name\x18\x01 \x01(\x09\x12\x1C\x0A\x0Csource_table\x18\x02 \x01(\x09B\x06\xE0A\x05\xE0A\x02\x12\x1A\x0A\x0Dsource_backup\x18\x0A \x01(\x09B\x03\xE0A\x03\x124\x0A\x0Bexpire_time\x18\x03 \x01(\x0B2\x1A.google.protobuf.TimestampB\x03\xE0A\x02\x123\x0A\x0Astart_time\x18\x04 \x01(\x0B2\x1A.google.protobuf.TimestampB\x03\xE0A\x03\x121\x0A\x08end_time\x18\x05 \x01(\x0B2\x1A.google.protobuf.TimestampB\x03\xE0A\x03\x12\x17\x0A\x0Asize_bytes\x18\x06 \x01(\x03B\x03\xE0A\x03\x12:\x0A\x05state\x18\x07 \x01(\x0E2&.google.bigtable.admin.v2.Backup.StateB\x03\xE0A\x03\x12F\x0A\x0Fencryption_info\x18\x09 \x01(\x0B2(.google.bigtable.admin.v2.EncryptionInfoB\x03\xE0A\x03\x12@\x0A\x0Bbackup_type\x18\x0B \x01(\x0E2+.google.bigtable.admin.v2.Backup.BackupType\x128\x0A\x14hot_to_standard_time\x18\x0C \x01(\x0B2\x1A.google.protobuf.Timestamp\"7\x0A\x05State\x12\x15\x0A\x11STATE_UNSPECIFIED\x10\x00\x12\x0C\x0A\x08CREATING\x10\x01\x12\x09\x0A\x05READY\x10\x02\"@\x0A\x0ABackupType\x12\x1B\x0A\x17BACKUP_TYPE_UNSPECIFIED\x10\x00\x12\x0C\x0A\x08STANDARD\x10\x01\x12\x07\x0A\x03HOT\x10\x02:u\xEAAr\x0A#bigtableadmin.googleapis.com/Backup\x12Kprojects/{project}/instances/{instance}/clusters/{cluster}/backups/{backup}\"\xC0\x01\x0A\x0ABackupInfo\x12\x13\x0A\x06backup\x18\x01 \x01(\x09B\x03\xE0A\x03\x123\x0A\x0Astart_time\x18\x02 \x01(\x0B2\x1A.google.protobuf.TimestampB\x03\xE0A\x03\x121\x0A\x08end_time\x18\x03 \x01(\x0B2\x1A.google.protobuf.TimestampB\x03\xE0A\x03\x12\x19\x0A\x0Csource_table\x18\x04 \x01(\x09B\x03\xE0A\x03\x12\x1A\x0A\x0Dsource_backup\x18\x0A \x01(\x09B\x03\xE0A\x03\"]\x0A\x13TieredStorageConfig\x12F\x0A\x11infrequent_access\x18\x01 \x01(\x0B2+.google.bigtable.admin.v2.TieredStorageRule\"W\x0A\x11TieredStorageRule\x12:\x0A\x15include_if_older_than\x18\x01 \x01(\x0B2\x19.google.protobuf.DurationH\x00B\x06\x0A\x04rule\"-\x0A\x0BProtoSchema\x12\x1E\x0A\x11proto_descriptors\x18\x02 \x01(\x0CB\x03\xE0A\x02\"\xA0\x02\x0A\x0CSchemaBundle\x12\x11\x0A\x04name\x18\x01 \x01(\x09B\x03\xE0A\x08\x12=\x0A\x0Cproto_schema\x18\x02 \x01(\x0B2%.google.bigtable.admin.v2.ProtoSchemaH\x00\x12\x11\x0A\x04etag\x18\x03 \x01(\x09B\x03\xE0A\x01:\xA2\x01\xEAA\x9E\x01\x0A)bigtableadmin.googleapis.com/SchemaBundle\x12Tprojects/{project}/instances/{instance}/tables/{table}/schemaBundles/{schema_bundle}*\x0DschemaBundles2\x0CschemaBundleB\x06\x0A\x04type*D\x0A\x11RestoreSourceType\x12#\x0A\x1FRESTORE_SOURCE_TYPE_UNSPECIFIED\x10\x00\x12\x0A\x0A\x06BACKUP\x10\x01B\xF7\x02\x0A\x1Ccom.google.bigtable.admin.v2B\x0ATableProtoP\x01Z8cloud.google.com/go/bigtable/admin/apiv2/adminpb;adminpb\xAA\x02\x1EGoogle.Cloud.Bigtable.Admin.V2\xCA\x02\x1EGoogle\\Cloud\\Bigtable\\Admin\\V2\xEA\x02\"Google::Cloud::Bigtable::Admin::V2\xEAA\xA6\x01\x0A(cloudkms.googleapis.com/CryptoKeyVersion\x12zprojects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}b\x06proto3"
         , true);
 
         static::$is_initialized = true;
diff --git a/Bigtable/metadata/V2/FeatureFlags.php b/Bigtable/metadata/V2/FeatureFlags.php
index f991e5bfba3c..7f36115cd844 100644
--- a/Bigtable/metadata/V2/FeatureFlags.php
+++ b/Bigtable/metadata/V2/FeatureFlags.php
@@ -14,8 +14,9 @@ public static function initOnce() {
         if (static::$is_initialized == true) {
           return;
         }
+        \GPBMetadata\Google\Api\FieldBehavior::initOnce();
         $pool->internalAddGeneratedFile(
-            "\x0A\xEE\x04\x0A&google/bigtable/v2/feature_flags.proto\x12\x12google.bigtable.v2\"\xE9\x02\x0A\x0CFeatureFlags\x12\x15\x0A\x0Dreverse_scans\x18\x01 \x01(\x08\x12\x1E\x0A\x16mutate_rows_rate_limit\x18\x03 \x01(\x08\x12\x1F\x0A\x17mutate_rows_rate_limit2\x18\x05 \x01(\x08\x12\"\x0A\x1Alast_scanned_row_responses\x18\x04 \x01(\x08\x12\x16\x0A\x0Erouting_cookie\x18\x06 \x01(\x08\x12\x12\x0A\x0Aretry_info\x18\x07 \x01(\x08\x12#\x0A\x1Bclient_side_metrics_enabled\x18\x08 \x01(\x08\x12 \x0A\x18traffic_director_enabled\x18\x09 \x01(\x08\x12\x1F\x0A\x17direct_access_requested\x18\x0A \x01(\x08\x12\x11\x0A\x09peer_info\x18\x0B \x01(\x08\x12\x1B\x0A\x13sessions_compatible\x18\x0C \x01(\x08\x12\x19\x0A\x11sessions_required\x18\x0D \x01(\x08B\xBB\x01\x0A\x16com.google.bigtable.v2B\x11FeatureFlagsProtoP\x01Z8cloud.google.com/go/bigtable/apiv2/bigtablepb;bigtablepb\xAA\x02\x18Google.Cloud.Bigtable.V2\xCA\x02\x18Google\\Cloud\\Bigtable\\V2\xEA\x02\x1BGoogle::Cloud::Bigtable::V2b\x06proto3"
+            "\x0A\x92\x05\x0A&google/bigtable/v2/feature_flags.proto\x12\x12google.bigtable.v2\"\x8D\x03\x0A\x0CFeatureFlags\x12\x15\x0A\x0Dreverse_scans\x18\x01 \x01(\x08\x12\x1E\x0A\x16mutate_rows_rate_limit\x18\x03 \x01(\x08\x12\x1F\x0A\x17mutate_rows_rate_limit2\x18\x05 \x01(\x08\x12\"\x0A\x1Alast_scanned_row_responses\x18\x04 \x01(\x08\x12\x16\x0A\x0Erouting_cookie\x18\x06 \x01(\x08\x12\x12\x0A\x0Aretry_info\x18\x07 \x01(\x08\x12#\x0A\x1Bclient_side_metrics_enabled\x18\x08 \x01(\x08\x12 \x0A\x18traffic_director_enabled\x18\x09 \x01(\x08\x12\x1F\x0A\x17direct_access_requested\x18\x0A \x01(\x08\x12\x11\x0A\x09peer_info\x18\x0B \x01(\x08\x12\x1B\x0A\x13sessions_compatible\x18\x0C \x01(\x08\x12\x19\x0A\x11sessions_required\x18\x0D \x01(\x08\x12\"\x0A\x15microsecond_timestamp\x18\x0E \x01(\x08B\x03\xE0A\x01B\xBB\x01\x0A\x16com.google.bigtable.v2B\x11FeatureFlagsProtoP\x01Z8cloud.google.com/go/bigtable/apiv2/bigtablepb;bigtablepb\xAA\x02\x18Google.Cloud.Bigtable.V2\xCA\x02\x18Google\\Cloud\\Bigtable\\V2\xEA\x02\x1BGoogle::Cloud::Bigtable::V2b\x06proto3"
         , true);
 
         static::$is_initialized = true;
diff --git a/Bigtable/src/Admin/V2/Table/TimestampGranularity.php b/Bigtable/src/Admin/V2/Table/TimestampGranularity.php
index df2edb453322..4ee834622457 100644
--- a/Bigtable/src/Admin/V2/Table/TimestampGranularity.php
+++ b/Bigtable/src/Admin/V2/Table/TimestampGranularity.php
@@ -27,10 +27,17 @@ class TimestampGranularity
      * Generated from protobuf enum <code>MILLIS = 1;</code>
      */
     const MILLIS = 1;
+    /**
+     * The table keeps data versioned at a granularity of 1us.
+     *
+     * Generated from protobuf enum <code>MICROS = 2;</code>
+     */
+    const MICROS = 2;
 
     private static $valueToName = [
         self::TIMESTAMP_GRANULARITY_UNSPECIFIED => 'TIMESTAMP_GRANULARITY_UNSPECIFIED',
         self::MILLIS => 'MILLIS',
+        self::MICROS => 'MICROS',
     ];
 
     public static function name($value)
diff --git a/Bigtable/src/V2/FeatureFlags.php b/Bigtable/src/V2/FeatureFlags.php
index e1d3fd8b794e..d5e775d74068 100644
--- a/Bigtable/src/V2/FeatureFlags.php
+++ b/Bigtable/src/V2/FeatureFlags.php
@@ -102,6 +102,13 @@ class FeatureFlags extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>bool sessions_required = 13;</code>
      */
     protected $sessions_required = false;
+    /**
+     * Optional. Indicates whether the client supports microsecond precision
+     * timestamps.
+     *
+     * Generated from protobuf field <code>bool microsecond_timestamp = 14 [(.google.api.field_behavior) = OPTIONAL];</code>
+     */
+    protected $microsecond_timestamp = false;
 
     /**
      * Constructor.
@@ -141,6 +148,9 @@ class FeatureFlags extends \Google\Protobuf\Internal\Message
      *           Indicates whether the client supports the Bigtable Sessions API.
      *     @type bool $sessions_required
      *           Internal flag to force sessions for internal projects.
+     *     @type bool $microsecond_timestamp
+     *           Optional. Indicates whether the client supports microsecond precision
+     *           timestamps.
      * }
      */
     public function __construct($data = NULL) {
@@ -476,5 +486,33 @@ public function setSessionsRequired($var)
         return $this;
     }
 
+    /**
+     * Optional. Indicates whether the client supports microsecond precision
+     * timestamps.
+     *
+     * Generated from protobuf field <code>bool microsecond_timestamp = 14 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return bool
+     */
+    public function getMicrosecondTimestamp()
+    {
+        return $this->microsecond_timestamp;
+    }
+
+    /**
+     * Optional. Indicates whether the client supports microsecond precision
+     * timestamps.
+     *
+     * Generated from protobuf field <code>bool microsecond_timestamp = 14 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param bool $var
+     * @return $this
+     */
+    public function setMicrosecondTimestamp($var)
+    {
+        GPBUtil::checkBool($var);
+        $this->microsecond_timestamp = $var;
+
+        return $this;
+    }
+
 }