/**
* Merges the incoming structure definition with the existing structure.
*
* @return void
*
* @note Currently only supports XML format.
* @since 12.1
* @throws Exception on error.
* @todo If it's not XML convert to XML first.
*/
protected function mergeStructure()
{
// Initialise variables.
$prefix = $this->db->getPrefix();
$tables = $this->db->getTableList();
if ($this->from instanceof SimpleXMLElement) {
$xml = $this->from;
} else {
$xml = new SimpleXMLElement($this->from);
}
// Get all the table definitions.
$xmlTables = $xml->xpath('database/table_structure');
foreach ($xmlTables as $table) {
// Convert the magic prefix into the real table name.
$tableName = (string) $table['name'];
$tableName = preg_replace('|^#__|', $prefix, $tableName);
if (in_array($tableName, $tables)) {
// The table already exists. Now check if there is any difference.
if ($queries = $this->getAlterTableSQL($xml->database->table_structure)) {
// Run the queries to upgrade the data structure.
foreach ($queries as $query) {
$this->db->setQuery((string) $query);
try {
$this->db->execute();
} catch (RuntimeException $e) {
$this->addLog('Fail: ' . $this->db->getQuery());
throw $e;
}
$this->addLog('Pass: '******'Fail: ' . $this->db->getQuery());
throw $e;
}
$this->addLog('Pass: ' . $this->db->getQuery());
}
}
}
