Issue #3291464 by pstewart: Support for SQL Server specific DSN connection options

src/Driver/Database/sqlsrv/Connection.php

@@ -325,6 +325,7 @@ class Connection extends DatabaseConnection {
     // Build the DSN.
     $options = [];
     $options['Server'] = $connection_options['host'] . (!empty($connection_options['port']) ? ',' . $connection_options['port'] : '');
+
     // We might not have a database in the
     // connection options, for example, during
     // database creation in Install.
@@ -332,6 +333,59 @@ class Connection extends DatabaseConnection {
       $options['Database'] = $connection_options['database'];
     }
 
+    // Set sqlsrv specific DSN options.
+    if (isset($connection_options['readonly'])) {
+      $options['ApplicationIntent'] = 'ReadOnly';
+    }
+
+    if (isset($connection_options['pooling']) && $connection_options['pooling'] === false) {
+      $options['ConnectionPooling'] = '0';
+    }
+
+    if (isset($connection_options['appname'])) {
+      $options['APP'] = $connection_options['appname'];
+    }
+
+    if (isset($connection_options['encrypt'])) {
+      $options['Encrypt'] = $connection_options['encrypt'];
+    }
+
+    if (isset($connection_options['trust_server_certificate'])) {
+      $options['TrustServerCertificate'] = $connection_options['trust_server_certificate'];
+    }
+
+    if (isset($connection_options['multiple_active_result_sets']) && $connection_options['multiple_active_result_sets'] === false) {
+      $options['MultipleActiveResultSets'] = 'false';
+    }
+
+    if (isset($connection_options['transaction_isolation'])) {
+      $options['TransactionIsolation'] = $connection_options['transaction_isolation'];
+    }
+
+    if (isset($connection_options['multi_subnet_failover'])) {
+      $options['MultiSubnetFailover'] = $connection_options['multi_subnet_failover'];
+    }
+
+    if (isset($connection_options['column_encryption'])) {
+      $options['ColumnEncryption'] = $connection_options['column_encryption'];
+    }
+
+    if (isset($connection_options['key_store_authentication'])) {
+      $options['KeyStoreAuthentication'] = $connection_options['key_store_authentication'];
+    }
+
+    if (isset($connection_options['key_store_principal_id'])) {
+      $options['KeyStorePrincipalId'] = $connection_options['key_store_principal_id'];
+    }
+
+    if (isset($connection_options['key_store_secret'])) {
+      $options['KeyStoreSecret'] = $connection_options['key_store_secret'];
+    }
+
+    if (isset($connection_options['login_timeout'])) {
+      $options['LoginTimeout'] = $connection_options['login_timeout'];
+    }
+
     // Build the DSN.
     $dsn = 'sqlsrv:';
     foreach ($options as $key => $value) {