diff --git a/SqlAdmin/metadata/V1Beta4/CloudSqlResources.php b/SqlAdmin/metadata/V1Beta4/CloudSqlResources.php
index bac030aa61ad..bc9bba0bcbea 100644
Binary files a/SqlAdmin/metadata/V1Beta4/CloudSqlResources.php and b/SqlAdmin/metadata/V1Beta4/CloudSqlResources.php differ
diff --git a/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/promote_replica.php b/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/promote_replica.php
index 222a100179bf..26cffb03eac2 100644
--- a/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/promote_replica.php
+++ b/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/promote_replica.php
@@ -28,7 +28,8 @@
 use Google\Cloud\Sql\V1beta4\SqlInstancesServiceClient;
 
 /**
- * Promotes the read replica instance to be a stand-alone Cloud SQL instance.
+ * Promotes the read replica instance to be an independent Cloud SQL
+ * primary instance.
  * Using this operation might cause your instance to restart.
  *
  * This sample has been automatically generated and should be regarded as a code
diff --git a/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/switchover.php b/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/switchover.php
index 0a321b59cd95..31a51890b623 100644
--- a/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/switchover.php
+++ b/SqlAdmin/samples/V1beta4/SqlInstancesServiceClient/switchover.php
@@ -28,7 +28,8 @@
 use Google\Cloud\Sql\V1beta4\SqlInstancesServiceClient;
 
 /**
- * Switches over from the primary instance to a replica instance.
+ * Switches over from the primary instance to the designated DR replica
+ * instance.
  *
  * This sample has been automatically generated and should be regarded as a code
  * template only. It will require modifications to work:
diff --git a/SqlAdmin/src/V1beta4/BackupConfiguration/TransactionalLogStorageState.php b/SqlAdmin/src/V1beta4/BackupConfiguration/TransactionalLogStorageState.php
index 9b18b6a7219a..8c7c49af2bda 100644
--- a/SqlAdmin/src/V1beta4/BackupConfiguration/TransactionalLogStorageState.php
+++ b/SqlAdmin/src/V1beta4/BackupConfiguration/TransactionalLogStorageState.php
@@ -7,8 +7,8 @@
 use UnexpectedValueException;
 
 /**
- * This value contains the storage location of transactional logs for the
- * database for point-in-time recovery.
+ * This value contains the storage location of the transactional logs
+ * used to perform point-in-time recovery (PITR) for the database.
  *
  * Protobuf type <code>google.cloud.sql.v1beta4.BackupConfiguration.TransactionalLogStorageState</code>
  */
@@ -21,27 +21,31 @@ class TransactionalLogStorageState
      */
     const TRANSACTIONAL_LOG_STORAGE_STATE_UNSPECIFIED = 0;
     /**
-     * The transaction logs for the instance are stored on a data disk.
+     * The transaction logs used for PITR for the instance are stored
+     * on a data disk.
      *
      * Generated from protobuf enum <code>DISK = 1;</code>
      */
     const DISK = 1;
     /**
-     * The transaction logs for the instance are switching from being stored on
-     * a data disk to being stored in Cloud Storage.
+     * The transaction logs used for PITR for the instance are switching from
+     * being stored on a data disk to being stored in Cloud Storage.
+     * Only applicable to MySQL.
      *
      * Generated from protobuf enum <code>SWITCHING_TO_CLOUD_STORAGE = 2;</code>
      */
     const SWITCHING_TO_CLOUD_STORAGE = 2;
     /**
-     * The transaction logs for the instance are now stored in Cloud Storage.
-     * Previously, they were stored on a data disk.
+     * The transaction logs used for PITR for the instance are now stored
+     * in Cloud Storage. Previously, they were stored on a data disk.
+     * Only applicable to MySQL.
      *
      * Generated from protobuf enum <code>SWITCHED_TO_CLOUD_STORAGE = 3;</code>
      */
     const SWITCHED_TO_CLOUD_STORAGE = 3;
     /**
-     * The transaction logs for the instance are stored in Cloud Storage.
+     * The transaction logs used for PITR for the instance are stored in
+     * Cloud Storage. Only applicable to MySQL and PostgreSQL.
      *
      * Generated from protobuf enum <code>CLOUD_STORAGE = 4;</code>
      */
diff --git a/SqlAdmin/src/V1beta4/DatabaseInstance.php b/SqlAdmin/src/V1beta4/DatabaseInstance.php
index 8efed83d3db3..b6a470e9bf0a 100644
--- a/SqlAdmin/src/V1beta4/DatabaseInstance.php
+++ b/SqlAdmin/src/V1beta4/DatabaseInstance.php
@@ -303,10 +303,10 @@ class DatabaseInstance extends \Google\Protobuf\Internal\Message
      */
     private $write_endpoint = null;
     /**
-     * The pair of a primary instance and disaster recovery (DR) replica.
+     * A primary instance and disaster recovery (DR) replica pair.
      * A DR replica is a cross-region replica that you designate
      * for failover in the event that the primary instance
-     * has regional failure.
+     * experiences regional failure. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>optional .google.cloud.sql.v1beta4.ReplicationCluster replication_cluster = 54;</code>
      */
@@ -444,10 +444,10 @@ class DatabaseInstance extends \Google\Protobuf\Internal\Message
      *     @type string $write_endpoint
      *           Output only. The dns name of the primary instance in a replication group.
      *     @type \Google\Cloud\Sql\V1beta4\ReplicationCluster $replication_cluster
-     *           The pair of a primary instance and disaster recovery (DR) replica.
+     *           A primary instance and disaster recovery (DR) replica pair.
      *           A DR replica is a cross-region replica that you designate
      *           for failover in the event that the primary instance
-     *           has regional failure.
+     *           experiences regional failure. Only applicable to MySQL.
      *     @type \Google\Cloud\Sql\V1beta4\GeminiInstanceConfig $gemini_config
      *           Gemini instance configuration.
      * }
@@ -1895,10 +1895,10 @@ public function setWriteEndpoint($var)
     }
 
     /**
-     * The pair of a primary instance and disaster recovery (DR) replica.
+     * A primary instance and disaster recovery (DR) replica pair.
      * A DR replica is a cross-region replica that you designate
      * for failover in the event that the primary instance
-     * has regional failure.
+     * experiences regional failure. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>optional .google.cloud.sql.v1beta4.ReplicationCluster replication_cluster = 54;</code>
      * @return \Google\Cloud\Sql\V1beta4\ReplicationCluster|null
@@ -1919,10 +1919,10 @@ public function clearReplicationCluster()
     }
 
     /**
-     * The pair of a primary instance and disaster recovery (DR) replica.
+     * A primary instance and disaster recovery (DR) replica pair.
      * A DR replica is a cross-region replica that you designate
      * for failover in the event that the primary instance
-     * has regional failure.
+     * experiences regional failure. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>optional .google.cloud.sql.v1beta4.ReplicationCluster replication_cluster = 54;</code>
      * @param \Google\Cloud\Sql\V1beta4\ReplicationCluster $var
diff --git a/SqlAdmin/src/V1beta4/Gapic/SqlInstancesServiceGapicClient.php b/SqlAdmin/src/V1beta4/Gapic/SqlInstancesServiceGapicClient.php
index d08d06b5136b..1539f631b1ea 100644
--- a/SqlAdmin/src/V1beta4/Gapic/SqlInstancesServiceGapicClient.php
+++ b/SqlAdmin/src/V1beta4/Gapic/SqlInstancesServiceGapicClient.php
@@ -1412,7 +1412,8 @@ public function performDiskShrink(array $optionalArgs = [])
     }
 
     /**
-     * Promotes the read replica instance to be a stand-alone Cloud SQL instance.
+     * Promotes the read replica instance to be an independent Cloud SQL
+     * primary instance.
      * Using this operation might cause your instance to restart.
      *
      * Sample code:
@@ -1433,9 +1434,13 @@ public function performDiskShrink(array $optionalArgs = [])
      *     @type string $project
      *           ID of the project that contains the read replica.
      *     @type bool $failover
-     *           Set to true if the promote operation should attempt to re-add the original
-     *           primary as a replica when it comes back online. Otherwise, if this value is
-     *           false or not set, the original primary will be a standalone instance.
+     *           Set to true to invoke a replica failover to the designated DR replica.
+     *           As part of replica failover, the promote operation attempts
+     *           to add the original primary instance as a replica of the promoted
+     *           DR replica when the original primary instance comes back online.
+     *           If set to false or not specified, then the original primary
+     *           instance becomes an independent Cloud SQL primary instance.
+     *           Only applicable to MySQL.
      *     @type RetrySettings|array $retrySettings
      *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
      *           associative array of retry settings parameters. See the documentation on
@@ -2017,8 +2022,9 @@ public function rotateServerCa(array $optionalArgs = [])
      *           for MySQL.
      *           For allowed values, use constants defined on {@see \Google\Cloud\Sql\V1beta4\ExternalSyncParallelLevel}
      *     @type int $migrationType
-     *           Optional. MigrationType decides if the migration is a physical file based
-     *           migration or logical migration.
+     *           Optional. MigrationType configures the migration to use physical files or
+     *           logical dump files. If not set, then the logical dump file configuration is
+     *           used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *           For allowed values, use constants defined on {@see \Google\Cloud\Sql\V1beta4\SqlInstancesVerifyExternalSyncSettingsRequest\MigrationType}
      *     @type RetrySettings|array $retrySettings
      *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
@@ -2201,7 +2207,8 @@ public function stopReplica(array $optionalArgs = [])
     }
 
     /**
-     * Switches over from the primary instance to a replica instance.
+     * Switches over from the primary instance to the designated DR replica
+     * instance.
      *
      * Sample code:
      * ```
@@ -2430,12 +2437,13 @@ public function update(array $optionalArgs = [])
      *     @type MySqlSyncConfig $mysqlSyncConfig
      *           Optional. MySQL-specific settings for start external sync.
      *     @type int $migrationType
-     *           Optional. MigrationType field decides if the migration is a physical file
-     *           based migration or logical migration
+     *           Optional. MigrationType configures the migration to use physical files or
+     *           logical dump files. If not set, then the logical dump file configuration is
+     *           used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *           For allowed values, use constants defined on {@see \Google\Cloud\Sql\V1beta4\SqlInstancesVerifyExternalSyncSettingsRequest\MigrationType}
      *     @type int $syncParallelLevel
-     *           Optional. Parallel level for initial data sync. Currently only applicable
-     *           for PostgreSQL.
+     *           Optional. Parallel level for initial data sync. Only applicable for
+     *           PostgreSQL.
      *           For allowed values, use constants defined on {@see \Google\Cloud\Sql\V1beta4\ExternalSyncParallelLevel}
      *     @type RetrySettings|array $retrySettings
      *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
diff --git a/SqlAdmin/src/V1beta4/GeminiInstanceConfig.php b/SqlAdmin/src/V1beta4/GeminiInstanceConfig.php
index 0ce6fcd8316c..1f3613fa25be 100644
--- a/SqlAdmin/src/V1beta4/GeminiInstanceConfig.php
+++ b/SqlAdmin/src/V1beta4/GeminiInstanceConfig.php
@@ -9,7 +9,7 @@
 use Google\Protobuf\Internal\GPBUtil;
 
 /**
- * Gemini configuration.
+ * Gemini instance configuration.
  *
  * Generated from protobuf message <code>google.cloud.sql.v1beta4.GeminiInstanceConfig</code>
  */
@@ -22,31 +22,31 @@ class GeminiInstanceConfig extends \Google\Protobuf\Internal\Message
      */
     private $entitled = null;
     /**
-     * Output only. Whether vacuum management is enabled.
+     * Output only. Whether the vacuum management is enabled.
      *
      * Generated from protobuf field <code>optional bool google_vacuum_mgmt_enabled = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
     private $google_vacuum_mgmt_enabled = null;
     /**
-     * Output only. Whether oom session cancel is enabled.
+     * Output only. Whether canceling the out-of-memory (OOM) session is enabled.
      *
      * Generated from protobuf field <code>optional bool oom_session_cancel_enabled = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
     private $oom_session_cancel_enabled = null;
     /**
-     * Output only. Whether active query is enabled.
+     * Output only. Whether the active query is enabled.
      *
      * Generated from protobuf field <code>optional bool active_query_enabled = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
     private $active_query_enabled = null;
     /**
-     * Output only. Whether index advisor is enabled.
+     * Output only. Whether the index advisor is enabled.
      *
      * Generated from protobuf field <code>optional bool index_advisor_enabled = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
     private $index_advisor_enabled = null;
     /**
-     * Output only. Whether flag recommender is enabled.
+     * Output only. Whether the flag recommender is enabled.
      *
      * Generated from protobuf field <code>optional bool flag_recommender_enabled = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
@@ -61,15 +61,15 @@ class GeminiInstanceConfig extends \Google\Protobuf\Internal\Message
      *     @type bool $entitled
      *           Output only. Whether Gemini is enabled.
      *     @type bool $google_vacuum_mgmt_enabled
-     *           Output only. Whether vacuum management is enabled.
+     *           Output only. Whether the vacuum management is enabled.
      *     @type bool $oom_session_cancel_enabled
-     *           Output only. Whether oom session cancel is enabled.
+     *           Output only. Whether canceling the out-of-memory (OOM) session is enabled.
      *     @type bool $active_query_enabled
-     *           Output only. Whether active query is enabled.
+     *           Output only. Whether the active query is enabled.
      *     @type bool $index_advisor_enabled
-     *           Output only. Whether index advisor is enabled.
+     *           Output only. Whether the index advisor is enabled.
      *     @type bool $flag_recommender_enabled
-     *           Output only. Whether flag recommender is enabled.
+     *           Output only. Whether the flag recommender is enabled.
      * }
      */
     public function __construct($data = NULL) {
@@ -114,7 +114,7 @@ public function setEntitled($var)
     }
 
     /**
-     * Output only. Whether vacuum management is enabled.
+     * Output only. Whether the vacuum management is enabled.
      *
      * Generated from protobuf field <code>optional bool google_vacuum_mgmt_enabled = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -135,7 +135,7 @@ public function clearGoogleVacuumMgmtEnabled()
     }
 
     /**
-     * Output only. Whether vacuum management is enabled.
+     * Output only. Whether the vacuum management is enabled.
      *
      * Generated from protobuf field <code>optional bool google_vacuum_mgmt_enabled = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
@@ -150,7 +150,7 @@ public function setGoogleVacuumMgmtEnabled($var)
     }
 
     /**
-     * Output only. Whether oom session cancel is enabled.
+     * Output only. Whether canceling the out-of-memory (OOM) session is enabled.
      *
      * Generated from protobuf field <code>optional bool oom_session_cancel_enabled = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -171,7 +171,7 @@ public function clearOomSessionCancelEnabled()
     }
 
     /**
-     * Output only. Whether oom session cancel is enabled.
+     * Output only. Whether canceling the out-of-memory (OOM) session is enabled.
      *
      * Generated from protobuf field <code>optional bool oom_session_cancel_enabled = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
@@ -186,7 +186,7 @@ public function setOomSessionCancelEnabled($var)
     }
 
     /**
-     * Output only. Whether active query is enabled.
+     * Output only. Whether the active query is enabled.
      *
      * Generated from protobuf field <code>optional bool active_query_enabled = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -207,7 +207,7 @@ public function clearActiveQueryEnabled()
     }
 
     /**
-     * Output only. Whether active query is enabled.
+     * Output only. Whether the active query is enabled.
      *
      * Generated from protobuf field <code>optional bool active_query_enabled = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
@@ -222,7 +222,7 @@ public function setActiveQueryEnabled($var)
     }
 
     /**
-     * Output only. Whether index advisor is enabled.
+     * Output only. Whether the index advisor is enabled.
      *
      * Generated from protobuf field <code>optional bool index_advisor_enabled = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -243,7 +243,7 @@ public function clearIndexAdvisorEnabled()
     }
 
     /**
-     * Output only. Whether index advisor is enabled.
+     * Output only. Whether the index advisor is enabled.
      *
      * Generated from protobuf field <code>optional bool index_advisor_enabled = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
@@ -258,7 +258,7 @@ public function setIndexAdvisorEnabled($var)
     }
 
     /**
-     * Output only. Whether flag recommender is enabled.
+     * Output only. Whether the flag recommender is enabled.
      *
      * Generated from protobuf field <code>optional bool flag_recommender_enabled = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -279,7 +279,7 @@ public function clearFlagRecommenderEnabled()
     }
 
     /**
-     * Output only. Whether flag recommender is enabled.
+     * Output only. Whether the flag recommender is enabled.
      *
      * Generated from protobuf field <code>optional bool flag_recommender_enabled = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
diff --git a/SqlAdmin/src/V1beta4/IpConfiguration.php b/SqlAdmin/src/V1beta4/IpConfiguration.php
index 6f570c16aafd..fb332bdc43e6 100644
--- a/SqlAdmin/src/V1beta4/IpConfiguration.php
+++ b/SqlAdmin/src/V1beta4/IpConfiguration.php
@@ -80,12 +80,12 @@ class IpConfiguration extends \Google\Protobuf\Internal\Message
      * For SQL Server:
      * * `ssl_mode=ALLOW_UNENCRYPTED_AND_ENCRYPTED` and `require_ssl=false`
      * * `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=true`
-     * The value of `ssl_mode` gets priority over the value of `require_ssl`. For
-     * example, for the pair `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=false`,
-     * the `ssl_mode=ENCRYPTED_ONLY` means only accept SSL connections, while the
-     * `require_ssl=false` means accept both non-SSL and SSL connections. MySQL
-     * and PostgreSQL databases respect `ssl_mode` in this case and accept only
-     * SSL connections.
+     * The value of `ssl_mode` has priority over the value of `require_ssl`.
+     * For example, for the pair `ssl_mode=ENCRYPTED_ONLY` and
+     * `require_ssl=false`, `ssl_mode=ENCRYPTED_ONLY` means accept only SSL
+     * connections, while `require_ssl=false` means accept both non-SSL
+     * and SSL connections. In this case, MySQL and PostgreSQL databases respect
+     * `ssl_mode` and accepts only SSL connections.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.IpConfiguration.SslMode ssl_mode = 8;</code>
      */
@@ -144,12 +144,12 @@ class IpConfiguration extends \Google\Protobuf\Internal\Message
      *           For SQL Server:
      *           * `ssl_mode=ALLOW_UNENCRYPTED_AND_ENCRYPTED` and `require_ssl=false`
      *           * `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=true`
-     *           The value of `ssl_mode` gets priority over the value of `require_ssl`. For
-     *           example, for the pair `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=false`,
-     *           the `ssl_mode=ENCRYPTED_ONLY` means only accept SSL connections, while the
-     *           `require_ssl=false` means accept both non-SSL and SSL connections. MySQL
-     *           and PostgreSQL databases respect `ssl_mode` in this case and accept only
-     *           SSL connections.
+     *           The value of `ssl_mode` has priority over the value of `require_ssl`.
+     *           For example, for the pair `ssl_mode=ENCRYPTED_ONLY` and
+     *           `require_ssl=false`, `ssl_mode=ENCRYPTED_ONLY` means accept only SSL
+     *           connections, while `require_ssl=false` means accept both non-SSL
+     *           and SSL connections. In this case, MySQL and PostgreSQL databases respect
+     *           `ssl_mode` and accepts only SSL connections.
      *     @type \Google\Cloud\Sql\V1beta4\PscConfig $psc_config
      *           PSC settings for this instance.
      * }
@@ -489,12 +489,12 @@ public function setEnablePrivatePathForGoogleCloudServicesValue($var)
      * For SQL Server:
      * * `ssl_mode=ALLOW_UNENCRYPTED_AND_ENCRYPTED` and `require_ssl=false`
      * * `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=true`
-     * The value of `ssl_mode` gets priority over the value of `require_ssl`. For
-     * example, for the pair `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=false`,
-     * the `ssl_mode=ENCRYPTED_ONLY` means only accept SSL connections, while the
-     * `require_ssl=false` means accept both non-SSL and SSL connections. MySQL
-     * and PostgreSQL databases respect `ssl_mode` in this case and accept only
-     * SSL connections.
+     * The value of `ssl_mode` has priority over the value of `require_ssl`.
+     * For example, for the pair `ssl_mode=ENCRYPTED_ONLY` and
+     * `require_ssl=false`, `ssl_mode=ENCRYPTED_ONLY` means accept only SSL
+     * connections, while `require_ssl=false` means accept both non-SSL
+     * and SSL connections. In this case, MySQL and PostgreSQL databases respect
+     * `ssl_mode` and accepts only SSL connections.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.IpConfiguration.SslMode ssl_mode = 8;</code>
      * @return int
@@ -515,12 +515,12 @@ public function getSslMode()
      * For SQL Server:
      * * `ssl_mode=ALLOW_UNENCRYPTED_AND_ENCRYPTED` and `require_ssl=false`
      * * `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=true`
-     * The value of `ssl_mode` gets priority over the value of `require_ssl`. For
-     * example, for the pair `ssl_mode=ENCRYPTED_ONLY` and `require_ssl=false`,
-     * the `ssl_mode=ENCRYPTED_ONLY` means only accept SSL connections, while the
-     * `require_ssl=false` means accept both non-SSL and SSL connections. MySQL
-     * and PostgreSQL databases respect `ssl_mode` in this case and accept only
-     * SSL connections.
+     * The value of `ssl_mode` has priority over the value of `require_ssl`.
+     * For example, for the pair `ssl_mode=ENCRYPTED_ONLY` and
+     * `require_ssl=false`, `ssl_mode=ENCRYPTED_ONLY` means accept only SSL
+     * connections, while `require_ssl=false` means accept both non-SSL
+     * and SSL connections. In this case, MySQL and PostgreSQL databases respect
+     * `ssl_mode` and accepts only SSL connections.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.IpConfiguration.SslMode ssl_mode = 8;</code>
      * @param int $var
diff --git a/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php b/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
index d9ba3359399b..200afdff2f71 100644
--- a/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
+++ b/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
@@ -20,18 +20,21 @@ class SslMode
      */
     const SSL_MODE_UNSPECIFIED = 0;
     /**
-     * Allow non-SSL/non-TLS and SSL/TLS connections. For SSL/TLS connections,
-     * the client certificate won't be verified.
+     * Allow non-SSL/non-TLS and SSL/TLS connections.
+     * For SSL connections to MySQL and PostgreSQL, the client certificate
+     * isn't verified.
      * When this value is used, the legacy `require_ssl` flag must be false or
-     * cleared to avoid the conflict between values of two flags.
+     * cleared to avoid a conflict between the values of the two flags.
      *
      * Generated from protobuf enum <code>ALLOW_UNENCRYPTED_AND_ENCRYPTED = 1;</code>
      */
     const ALLOW_UNENCRYPTED_AND_ENCRYPTED = 1;
     /**
      * Only allow connections encrypted with SSL/TLS.
+     * For SSL connections to MySQL and PostgreSQL, the client certificate
+     * isn't verified.
      * When this value is used, the legacy `require_ssl` flag must be false or
-     * cleared to avoid the conflict between values of two flags.
+     * cleared to avoid a conflict between the values of the two flags.
      *
      * Generated from protobuf enum <code>ENCRYPTED_ONLY = 2;</code>
      */
@@ -48,7 +51,7 @@ class SslMode
      * [Cloud SQL
      * Connectors](https://cloud.google.com/sql/docs/postgres/connect-connectors)
      * to enforce client identity verification.
-     * This value is not applicable to SQL Server.
+     * Only applicable to MySQL and PostgreSQL. Not applicable to SQL Server.
      *
      * Generated from protobuf enum <code>TRUSTED_CLIENT_CERTIFICATE_REQUIRED = 3;</code>
      */
diff --git a/SqlAdmin/src/V1beta4/Operation/SqlOperationType.php b/SqlAdmin/src/V1beta4/Operation/SqlOperationType.php
index 95a74ec14960..f7ec185bd9d8 100644
--- a/SqlAdmin/src/V1beta4/Operation/SqlOperationType.php
+++ b/SqlAdmin/src/V1beta4/Operation/SqlOperationType.php
@@ -266,6 +266,25 @@ class SqlOperationType
      * Generated from protobuf enum <code>RECONFIGURE_OLD_PRIMARY = 44;</code>
      */
     const RECONFIGURE_OLD_PRIMARY = 44;
+    /**
+     * Indicates that the instance, its read replicas, and its cascading
+     * replicas are in maintenance. Maintenance typically gets initiated on
+     * groups of replicas first, followed by the primary instance. For each
+     * instance, maintenance typically causes the instance to be unavailable for
+     * 1-3 minutes.
+     *
+     * Generated from protobuf enum <code>CLUSTER_MAINTENANCE = 45;</code>
+     */
+    const CLUSTER_MAINTENANCE = 45;
+    /**
+     * Indicates that the instance (and any of its replicas) are currently in
+     * maintenance. This is initiated as a self-service request by using SSM.
+     * Maintenance typically causes the instance to be unavailable for 1-3
+     * minutes.
+     *
+     * Generated from protobuf enum <code>SELF_SERVICE_MAINTENANCE = 46;</code>
+     */
+    const SELF_SERVICE_MAINTENANCE = 46;
 
     private static $valueToName = [
         self::SQL_OPERATION_TYPE_UNSPECIFIED => 'SQL_OPERATION_TYPE_UNSPECIFIED',
@@ -310,6 +329,8 @@ class SqlOperationType
         self::ACQUIRE_SSRS_LEASE => 'ACQUIRE_SSRS_LEASE',
         self::RELEASE_SSRS_LEASE => 'RELEASE_SSRS_LEASE',
         self::RECONFIGURE_OLD_PRIMARY => 'RECONFIGURE_OLD_PRIMARY',
+        self::CLUSTER_MAINTENANCE => 'CLUSTER_MAINTENANCE',
+        self::SELF_SERVICE_MAINTENANCE => 'SELF_SERVICE_MAINTENANCE',
     ];
 
     public static function name($value)
diff --git a/SqlAdmin/src/V1beta4/ReplicationCluster.php b/SqlAdmin/src/V1beta4/ReplicationCluster.php
index 3cfb5ceed15b..58afedbfc485 100644
--- a/SqlAdmin/src/V1beta4/ReplicationCluster.php
+++ b/SqlAdmin/src/V1beta4/ReplicationCluster.php
@@ -9,7 +9,10 @@
 use Google\Protobuf\Internal\GPBUtil;
 
 /**
- * Primary-DR replica pair
+ * A primary instance and disaster recovery (DR) replica pair.
+ * A DR replica is a cross-region replica that you designate for failover
+ * in the event that the primary instance has regional failure.
+ * Only applicable to MySQL.
  *
  * Generated from protobuf message <code>google.cloud.sql.v1beta4.ReplicationCluster</code>
  */
@@ -19,16 +22,16 @@ class ReplicationCluster extends \Google\Protobuf\Internal\Message
      * Optional. If the instance is a primary instance, then this field identifies
      * the disaster recovery (DR) replica. A DR replica is an optional
      * configuration for Enterprise Plus edition instances. If the instance is a
-     * read replica, then the field is not set. Users can set this field to set a
-     * designated DR replica for a primary. Removing this field removes the DR
-     * replica.
+     * read replica, then the field is not set. Set this field to a replica name
+     * to designate a DR replica for a primary instance. Remove the replica name
+     * to remove the DR replica designation.
      *
      * Generated from protobuf field <code>optional string failover_dr_replica_name = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
     private $failover_dr_replica_name = null;
     /**
-     * Output only. read-only field that indicates if the replica is a dr_replica;
-     * not set for a primary.
+     * Output only. Read-only field that indicates whether the replica is a DR
+     * replica. This field is not set if the instance is a primary instance.
      *
      * Generated from protobuf field <code>optional bool dr_replica = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
@@ -44,12 +47,12 @@ class ReplicationCluster extends \Google\Protobuf\Internal\Message
      *           Optional. If the instance is a primary instance, then this field identifies
      *           the disaster recovery (DR) replica. A DR replica is an optional
      *           configuration for Enterprise Plus edition instances. If the instance is a
-     *           read replica, then the field is not set. Users can set this field to set a
-     *           designated DR replica for a primary. Removing this field removes the DR
-     *           replica.
+     *           read replica, then the field is not set. Set this field to a replica name
+     *           to designate a DR replica for a primary instance. Remove the replica name
+     *           to remove the DR replica designation.
      *     @type bool $dr_replica
-     *           Output only. read-only field that indicates if the replica is a dr_replica;
-     *           not set for a primary.
+     *           Output only. Read-only field that indicates whether the replica is a DR
+     *           replica. This field is not set if the instance is a primary instance.
      * }
      */
     public function __construct($data = NULL) {
@@ -61,9 +64,9 @@ public function __construct($data = NULL) {
      * Optional. If the instance is a primary instance, then this field identifies
      * the disaster recovery (DR) replica. A DR replica is an optional
      * configuration for Enterprise Plus edition instances. If the instance is a
-     * read replica, then the field is not set. Users can set this field to set a
-     * designated DR replica for a primary. Removing this field removes the DR
-     * replica.
+     * read replica, then the field is not set. Set this field to a replica name
+     * to designate a DR replica for a primary instance. Remove the replica name
+     * to remove the DR replica designation.
      *
      * Generated from protobuf field <code>optional string failover_dr_replica_name = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return string
@@ -87,9 +90,9 @@ public function clearFailoverDrReplicaName()
      * Optional. If the instance is a primary instance, then this field identifies
      * the disaster recovery (DR) replica. A DR replica is an optional
      * configuration for Enterprise Plus edition instances. If the instance is a
-     * read replica, then the field is not set. Users can set this field to set a
-     * designated DR replica for a primary. Removing this field removes the DR
-     * replica.
+     * read replica, then the field is not set. Set this field to a replica name
+     * to designate a DR replica for a primary instance. Remove the replica name
+     * to remove the DR replica designation.
      *
      * Generated from protobuf field <code>optional string failover_dr_replica_name = 2 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param string $var
@@ -104,8 +107,8 @@ public function setFailoverDrReplicaName($var)
     }
 
     /**
-     * Output only. read-only field that indicates if the replica is a dr_replica;
-     * not set for a primary.
+     * Output only. Read-only field that indicates whether the replica is a DR
+     * replica. This field is not set if the instance is a primary instance.
      *
      * Generated from protobuf field <code>optional bool dr_replica = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -126,8 +129,8 @@ public function clearDrReplica()
     }
 
     /**
-     * Output only. read-only field that indicates if the replica is a dr_replica;
-     * not set for a primary.
+     * Output only. Read-only field that indicates whether the replica is a DR
+     * replica. This field is not set if the instance is a primary instance.
      *
      * Generated from protobuf field <code>optional bool dr_replica = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
diff --git a/SqlAdmin/src/V1beta4/SqlDatabaseVersion.php b/SqlAdmin/src/V1beta4/SqlDatabaseVersion.php
index a5072e10aa56..c74106a9a36f 100644
--- a/SqlAdmin/src/V1beta4/SqlDatabaseVersion.php
+++ b/SqlAdmin/src/V1beta4/SqlDatabaseVersion.php
@@ -211,6 +211,12 @@ class SqlDatabaseVersion
      * Generated from protobuf enum <code>MYSQL_8_0_40 = 358;</code>
      */
     const MYSQL_8_0_40 = 358;
+    /**
+     * The database version is MySQL 8.4.
+     *
+     * Generated from protobuf enum <code>MYSQL_8_4 = 398;</code>
+     */
+    const MYSQL_8_4 = 398;
     /**
      * The database version is SQL Server 2019 Standard.
      *
@@ -294,6 +300,7 @@ class SqlDatabaseVersion
         self::MYSQL_8_0_38 => 'MYSQL_8_0_38',
         self::MYSQL_8_0_39 => 'MYSQL_8_0_39',
         self::MYSQL_8_0_40 => 'MYSQL_8_0_40',
+        self::MYSQL_8_4 => 'MYSQL_8_4',
         self::SQLSERVER_2019_STANDARD => 'SQLSERVER_2019_STANDARD',
         self::SQLSERVER_2019_ENTERPRISE => 'SQLSERVER_2019_ENTERPRISE',
         self::SQLSERVER_2019_EXPRESS => 'SQLSERVER_2019_EXPRESS',
diff --git a/SqlAdmin/src/V1beta4/SqlInstancesPromoteReplicaRequest.php b/SqlAdmin/src/V1beta4/SqlInstancesPromoteReplicaRequest.php
index 693c63b8607b..5facf1562a80 100644
--- a/SqlAdmin/src/V1beta4/SqlInstancesPromoteReplicaRequest.php
+++ b/SqlAdmin/src/V1beta4/SqlInstancesPromoteReplicaRequest.php
@@ -26,9 +26,13 @@ class SqlInstancesPromoteReplicaRequest extends \Google\Protobuf\Internal\Messag
      */
     private $project = '';
     /**
-     * Set to true if the promote operation should attempt to re-add the original
-     * primary as a replica when it comes back online. Otherwise, if this value is
-     * false or not set, the original primary will be a standalone instance.
+     * Set to true to invoke a replica failover to the designated DR replica.
+     * As part of replica failover, the promote operation attempts
+     * to add the original primary instance as a replica of the promoted
+     * DR replica when the original primary instance comes back online.
+     * If set to false or not specified, then the original primary
+     * instance becomes an independent Cloud SQL primary instance.
+     * Only applicable to MySQL.
      *
      * Generated from protobuf field <code>bool failover = 3;</code>
      */
@@ -45,9 +49,13 @@ class SqlInstancesPromoteReplicaRequest extends \Google\Protobuf\Internal\Messag
      *     @type string $project
      *           ID of the project that contains the read replica.
      *     @type bool $failover
-     *           Set to true if the promote operation should attempt to re-add the original
-     *           primary as a replica when it comes back online. Otherwise, if this value is
-     *           false or not set, the original primary will be a standalone instance.
+     *           Set to true to invoke a replica failover to the designated DR replica.
+     *           As part of replica failover, the promote operation attempts
+     *           to add the original primary instance as a replica of the promoted
+     *           DR replica when the original primary instance comes back online.
+     *           If set to false or not specified, then the original primary
+     *           instance becomes an independent Cloud SQL primary instance.
+     *           Only applicable to MySQL.
      * }
      */
     public function __construct($data = NULL) {
@@ -108,9 +116,13 @@ public function setProject($var)
     }
 
     /**
-     * Set to true if the promote operation should attempt to re-add the original
-     * primary as a replica when it comes back online. Otherwise, if this value is
-     * false or not set, the original primary will be a standalone instance.
+     * Set to true to invoke a replica failover to the designated DR replica.
+     * As part of replica failover, the promote operation attempts
+     * to add the original primary instance as a replica of the promoted
+     * DR replica when the original primary instance comes back online.
+     * If set to false or not specified, then the original primary
+     * instance becomes an independent Cloud SQL primary instance.
+     * Only applicable to MySQL.
      *
      * Generated from protobuf field <code>bool failover = 3;</code>
      * @return bool
@@ -121,9 +133,13 @@ public function getFailover()
     }
 
     /**
-     * Set to true if the promote operation should attempt to re-add the original
-     * primary as a replica when it comes back online. Otherwise, if this value is
-     * false or not set, the original primary will be a standalone instance.
+     * Set to true to invoke a replica failover to the designated DR replica.
+     * As part of replica failover, the promote operation attempts
+     * to add the original primary instance as a replica of the promoted
+     * DR replica when the original primary instance comes back online.
+     * If set to false or not specified, then the original primary
+     * instance becomes an independent Cloud SQL primary instance.
+     * Only applicable to MySQL.
      *
      * Generated from protobuf field <code>bool failover = 3;</code>
      * @param bool $var
diff --git a/SqlAdmin/src/V1beta4/SqlInstancesStartExternalSyncRequest.php b/SqlAdmin/src/V1beta4/SqlInstancesStartExternalSyncRequest.php
index f9ad0d745410..5275f84592a2 100644
--- a/SqlAdmin/src/V1beta4/SqlInstancesStartExternalSyncRequest.php
+++ b/SqlAdmin/src/V1beta4/SqlInstancesStartExternalSyncRequest.php
@@ -45,8 +45,9 @@ class SqlInstancesStartExternalSyncRequest extends \Google\Protobuf\Internal\Mes
      */
     private $sync_parallel_level = 0;
     /**
-     * Optional. MigrationType decides if the migration is a physical file based
-     * migration or logical migration.
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
@@ -73,8 +74,9 @@ class SqlInstancesStartExternalSyncRequest extends \Google\Protobuf\Internal\Mes
      *           Optional. Parallel level for initial data sync. Currently only applicable
      *           for MySQL.
      *     @type int $migration_type
-     *           Optional. MigrationType decides if the migration is a physical file based
-     *           migration or logical migration.
+     *           Optional. MigrationType configures the migration to use physical files or
+     *           logical dump files. If not set, then the logical dump file configuration is
+     *           used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      * }
      */
     public function __construct($data = NULL) {
@@ -246,8 +248,9 @@ public function setSyncParallelLevel($var)
     }
 
     /**
-     * Optional. MigrationType decides if the migration is a physical file based
-     * migration or logical migration.
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return int
@@ -258,8 +261,9 @@ public function getMigrationType()
     }
 
     /**
-     * Optional. MigrationType decides if the migration is a physical file based
-     * migration or logical migration.
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param int $var
diff --git a/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest.php b/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest.php
index b0e70355a21d..12b6a8209e1e 100644
--- a/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest.php
+++ b/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest.php
@@ -44,15 +44,16 @@ class SqlInstancesVerifyExternalSyncSettingsRequest extends \Google\Protobuf\Int
      */
     private $verify_replication_only = false;
     /**
-     * Optional. MigrationType field decides if the migration is a physical file
-     * based migration or logical migration
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 7 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
     private $migration_type = 0;
     /**
-     * Optional. Parallel level for initial data sync. Currently only applicable
-     * for PostgreSQL.
+     * Optional. Parallel level for initial data sync. Only applicable for
+     * PostgreSQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.ExternalSyncParallelLevel sync_parallel_level = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
@@ -78,11 +79,12 @@ class SqlInstancesVerifyExternalSyncSettingsRequest extends \Google\Protobuf\Int
      *     @type \Google\Cloud\Sql\V1beta4\MySqlSyncConfig $mysql_sync_config
      *           Optional. MySQL-specific settings for start external sync.
      *     @type int $migration_type
-     *           Optional. MigrationType field decides if the migration is a physical file
-     *           based migration or logical migration
+     *           Optional. MigrationType configures the migration to use physical files or
+     *           logical dump files. If not set, then the logical dump file configuration is
+     *           used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *     @type int $sync_parallel_level
-     *           Optional. Parallel level for initial data sync. Currently only applicable
-     *           for PostgreSQL.
+     *           Optional. Parallel level for initial data sync. Only applicable for
+     *           PostgreSQL.
      * }
      */
     public function __construct($data = NULL) {
@@ -252,8 +254,9 @@ public function setMysqlSyncConfig($var)
     }
 
     /**
-     * Optional. MigrationType field decides if the migration is a physical file
-     * based migration or logical migration
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 7 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return int
@@ -264,8 +267,9 @@ public function getMigrationType()
     }
 
     /**
-     * Optional. MigrationType field decides if the migration is a physical file
-     * based migration or logical migration
+     * Optional. MigrationType configures the migration to use physical files or
+     * logical dump files. If not set, then the logical dump file configuration is
+     * used. Valid values are `LOGICAL` or `PHYSICAL`. Only applicable to MySQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType migration_type = 7 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param int $var
@@ -280,8 +284,8 @@ public function setMigrationType($var)
     }
 
     /**
-     * Optional. Parallel level for initial data sync. Currently only applicable
-     * for PostgreSQL.
+     * Optional. Parallel level for initial data sync. Only applicable for
+     * PostgreSQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.ExternalSyncParallelLevel sync_parallel_level = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return int
@@ -292,8 +296,8 @@ public function getSyncParallelLevel()
     }
 
     /**
-     * Optional. Parallel level for initial data sync. Currently only applicable
-     * for PostgreSQL.
+     * Optional. Parallel level for initial data sync. Only applicable for
+     * PostgreSQL.
      *
      * Generated from protobuf field <code>.google.cloud.sql.v1beta4.ExternalSyncParallelLevel sync_parallel_level = 8 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param int $var
diff --git a/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest/MigrationType.php b/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest/MigrationType.php
index 02e6833a98f2..49218ddea1fc 100644
--- a/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest/MigrationType.php
+++ b/SqlAdmin/src/V1beta4/SqlInstancesVerifyExternalSyncSettingsRequest/MigrationType.php
@@ -7,27 +7,27 @@
 use UnexpectedValueException;
 
 /**
- * MigrationType enum decides if the migration is a physical file based
- * migration or logical migration
+ * MigrationType determines whether the migration is a physical file-based
+ * migration or a logical dump file-based migration.
  *
  * Protobuf type <code>google.cloud.sql.v1beta4.SqlInstancesVerifyExternalSyncSettingsRequest.MigrationType</code>
  */
 class MigrationType
 {
     /**
-     * If no migration type is specified it will be defaulted to LOGICAL.
+     * Default value is a logical dump file-based migration
      *
      * Generated from protobuf enum <code>MIGRATION_TYPE_UNSPECIFIED = 0;</code>
      */
     const MIGRATION_TYPE_UNSPECIFIED = 0;
     /**
-     * Logical Migrations
+     * Logical dump file-based migration
      *
      * Generated from protobuf enum <code>LOGICAL = 1;</code>
      */
     const LOGICAL = 1;
     /**
-     * Physical file based Migrations
+     * Physical file-based migration
      *
      * Generated from protobuf enum <code>PHYSICAL = 2;</code>
      */