WIP

framework/db/Command.php

@@ -272,11 +272,12 @@ class Command extends \yii\base\Component
         foreach ($values as $name => $value) {
             if (is_array($value)) {
                 $this->_pendingParams[$name] = $value;
+                $this->params[$name] = $value[0];
             } else {
                 $type = $this->db->getSchema()->getPdoType($value);
                 $this->_pendingParams[$name] = [$value, $type];
+                $this->params[$name] = $value;
             }
-            $this->params[$name] = $value;
         }
 
         return $this;

framework/db/Connection.php

@@ -643,8 +643,7 @@ class Connection extends Component
             if (($pos = strpos($this->dsn, ':')) !== false) {
                 $this->_driverName = strtolower(substr($this->dsn, 0, $pos));
             } else {
-                $this->open();
-                $this->_driverName = strtolower($this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME));
+                $this->_driverName = strtolower($this->getReadPdo()->getAttribute(PDO::ATTR_DRIVER_NAME));
             }
         }
         return $this->_driverName;

framework/db/Schema.php

@@ -369,9 +369,7 @@ abstract class Schema extends Object
             return $str;
         }
 
-        $pdo = $this->db->getReadPdo();
-
-        if (($value = $pdo->quote($str)) !== false) {
+        if (($value = $this->db->getReadPdo()->quote($str)) !== false) {
             return $value;
         } else {
             // the driver doesn't support quote (e.g. oci)

framework/db/cubrid/Schema.php

@@ -143,8 +143,9 @@ class Schema extends \yii\db\Schema
      */
     protected function loadTableSchema($name)
     {
-        $this->db->open();
-        $tableInfo = $this->db->pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE, $name);
+        $pdo = $this->db->getReadPdo();
+
+        $tableInfo = $pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE, $name);
 
         if (!isset($tableInfo[0]['NAME'])) {
             return null;
@@ -161,7 +162,7 @@ class Schema extends \yii\db\Schema
             $table->columns[$column->name] = $column;
         }
 
-        $primaryKeys = $this->db->pdo->cubrid_schema(\PDO::CUBRID_SCH_PRIMARY_KEY, $table->name);
+        $primaryKeys = $pdo->cubrid_schema(\PDO::CUBRID_SCH_PRIMARY_KEY, $table->name);
         foreach ($primaryKeys as $key) {
             $column = $table->columns[$key['ATTR_NAME']];
             $column->isPrimaryKey = true;
@@ -171,7 +172,7 @@ class Schema extends \yii\db\Schema
             }
         }
 
-        $foreignKeys = $this->db->pdo->cubrid_schema(\PDO::CUBRID_SCH_IMPORTED_KEYS, $table->name);
+        $foreignKeys = $pdo->cubrid_schema(\PDO::CUBRID_SCH_IMPORTED_KEYS, $table->name);
         foreach ($foreignKeys as $key) {
             if (isset($table->foreignKeys[$key['FK_NAME']])) {
                 $table->foreignKeys[$key['FK_NAME']][$key['FKCOLUMN_NAME']] = $key['PKCOLUMN_NAME'];
@@ -265,8 +266,8 @@ class Schema extends \yii\db\Schema
      */
     protected function findTableNames($schema = '')
     {
-        $this->db->open();
-        $tables = $this->db->pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE);
+        $pdo = $this->db->getReadPdo();
+        $tables =$pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE);
         $tableNames = [];
         foreach ($tables as $table) {
             // do not list system tables

framework/db/mssql/QueryBuilder.php

@@ -239,8 +239,8 @@ class QueryBuilder extends \yii\db\QueryBuilder
      */
     protected function isOldMssql()
     {
-        $this->db->open();
-        $version = preg_split("/\./", $this->db->pdo->getAttribute(\PDO::ATTR_SERVER_VERSION));
+        $pdo = $this->db->getReadPdo();
+        $version = preg_split("/\./", $pdo->getAttribute(\PDO::ATTR_SERVER_VERSION));
         return $version[0] < 11;
     }
 }

framework/db/oci/QueryBuilder.php

@@ -132,7 +132,11 @@ EOD;
         if ($value !== null) {
             $value = (int) $value;
         } else {
+            // use master connection to get the biggest PK value
+            $enableSlave = $this->db->enableSlave;
+            $this->db->enableSlave = false;
             $value = (int) $this->db->createCommand("SELECT MAX(\"{$tableSchema->primaryKey}\") FROM \"{$tableSchema->name}\"")->queryScalar();
+            $this->db->enableSlave = $enableSlave;
             $value++;
         }
 

framework/db/oci/Schema.php

@@ -195,7 +195,12 @@ EOD;
     public function getLastInsertID($sequenceName = '')
     {
         if ($this->db->isActive) {
-            return $this->db->createCommand("SELECT {$sequenceName}.CURRVAL FROM DUAL")->queryScalar();
+            // get the last insert id from the master connection
+            $enableSlave = $this->db->enableSlave;
+            $this->db->enableSlave = false;
+            $id = $this->db->createCommand("SELECT {$sequenceName}.CURRVAL FROM DUAL")->queryScalar();
+            $this->db->enableSlave = $enableSlave;
+            return $id;
         } else {
             throw new InvalidCallException('DB Connection is not active.');
         }

framework/db/pgsql/QueryBuilder.php

@@ -136,8 +136,8 @@ class QueryBuilder extends \yii\db\QueryBuilder
             $command .= "ALTER TABLE $tableName $enable TRIGGER ALL; ";
         }
 
-        #enable to have ability to alter several tables
-        $this->db->pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true);
+        // enable to have ability to alter several tables
+        $this->db->getWritePdo()->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true);
 
         return $command;
     }

framework/db/sqlite/QueryBuilder.php

@@ -120,7 +120,10 @@ class QueryBuilder extends \yii\db\QueryBuilder
             if ($value === null) {
                 $key = reset($table->primaryKey);
                 $tableName = $db->quoteTableName($tableName);
+                $enableSlave = $this->db->enableSlave;
+                $this->db->enableSlave = false;
                 $value = $db->createCommand("SELECT MAX('$key') FROM $tableName")->queryScalar();
+                $this->db->enableSlave = $enableSlave;
             } else {
                 $value = (int) $value - 1;
             }