DboSource::renderStatement PHP Method

    public function renderStatement($type, $data)
    {
        extract($data);
        $aliases = null;
        switch (strtolower($type)) {
            case 'select':
                return trim("SELECT {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order} {$limit}");
            case 'create':
                return "INSERT INTO {$table} ({$fields}) VALUES ({$values})";
            case 'update':
                if (!empty($alias)) {
                    $aliases = "{$this->alias}{$alias} {$joins} ";
                }
                return trim("UPDATE {$table} {$aliases}SET {$fields} {$conditions}");
            case 'delete':
                if (!empty($alias)) {
                    $aliases = "{$this->alias}{$alias} {$joins} ";
                }
                return trim("DELETE {$alias} FROM {$table} {$aliases}{$conditions}");
            case 'schema':
                foreach (array('columns', 'indexes', 'tableParameters') as $var) {
                    if (is_array(${$var})) {
                        ${$var} = "\t" . implode(",\n\t", array_filter(${$var}));
                    } else {
                        ${$var} = '';
                    }
                }
                if (trim($indexes) !== '') {
                    $columns .= ',';
                }
                return "CREATE TABLE {$table} (\n{$columns}{$indexes}) {$tableParameters};";
            case 'alter':
                return;
        }
    }

 /**
  * sql insert statement
  *
  * @param $datasource
  * @param $tablename
  * @param $exclude_missing_tables
  * @param $return if want return sql string, set true.
  * @return string
  */
 function getInsertSql($datasource, $tablename, $exclude_missing_tables = false, $return = false)
 {
     if (!$this->_checkCurrentDatasource($datasource)) {
         $this->_setupDataSource();
     }
     if (!$return && (empty($this->File) || !$this->File->writable())) {
         return false;
     }
     $tables = $this->_getProcessTables($tablename, $exclude_missing_tables);
     $insert_sql = '';
     foreach ($tables as $table => $fields) {
         /* @var $model AppModel */
         $model = ClassRegistry::init(array('class' => Inflector::classify($table), 'table' => $table));
         $field_names = array_keys($this->DataSource->describe($model));
         $full_tablename = $this->DataSource->fullTableName($model);
         $all_fields = implode(', ', array_map(array($this->DataSource, 'name'), $field_names));
         $count_query = array('table' => $full_tablename, 'fields' => 'count(*) ' . $this->DataSource->alias . 'count', 'alias' => $this->DataSource->alias . $this->DataSource->name($model->alias), 'joins' => '', 'conditions' => 'WHERE 1=1', 'group' => '', 'order' => '', 'limit' => '');
         $count_sql = $this->DataSource->renderStatement('select', $count_query);
         $total = $this->DataSource->fetchRow($count_sql);
         if (is_array($total)) {
             $total = $total[0]['count'];
         }
         $query = array('table' => $full_tablename, 'fields' => implode(', ', $this->DataSource->fields($model)), 'alias' => $this->DataSource->alias . $this->DataSource->name($model->alias), 'joins' => '', 'conditions' => '', 'group' => '', 'order' => '', 'limit' => '');
         $limit = 100;
         $record = array();
         for ($offset = 0; $offset < $total; $offset += $limit) {
             $query['limit'] = $this->DataSource->limit($limit, $offset);
             $select_sql = $this->DataSource->renderStatement('select', $query);
             $datas = $this->DataSource->fetchAll($select_sql, false);
             foreach ($datas as $record) {
                 $insert_query = array('table' => $full_tablename, 'fields' => $all_fields, 'values' => implode(', ', array_map(array($this->DataSource, 'value'), array_values($record[$model->alias]))));
                 $_sql = $this->out($this->DataSource->renderStatement('create', $insert_query) . ';');
                 if ($return) {
                     $insert_sql .= $_sql;
                 }
             }
         }
         // -- sequence update section for postgres
         // NOTE: only primary key sequence..
         if (method_exists($this->DataSource, 'getSequence')) {
             foreach ($fields as $field => $column) {
                 if ($field == 'indexes' || empty($record)) {
                     continue;
                 }
                 if ($column['type'] == 'integer' && isset($column['key']) && $column['key'] == 'primary') {
                     // only primary key
                     $sequence_name = $this->DataSource->getSequence($this->DataSource->fullTableName($model, false), $field);
                     $_sql = $this->out(sprintf('SELECT setval(%s, %s);', $this->DataSource->value($sequence_name), $record[$model->alias][$field]));
                     if ($return) {
                         $insert_sql .= $_sql;
                     }
                 }
             }
         }
     }
     return $insert_sql;
 }