/**
* Generates the INSERT SQL used by the persister to persist entities.
*
* @return string
* @internal Result is cached by getInsertSQL() per request.
*/
protected function _generateInsertSQL()
{
$insertSql = '';
$columns = $this->_getInsertColumnList();
if (empty($columns)) {
$insertSql = $this->_platform->getEmptyIdentityInsertSQL($this->_class->getQuotedTableName($this->_platform), $this->_class->getQuotedColumnName($this->_class->identifier[0], $this->_platform));
} else {
$columns = array_unique($columns);
$values = array_fill(0, count($columns), '?');
$insertSql = 'INSERT INTO ' . $this->_class->getQuotedTableName($this->_platform) . ' (' . implode(', ', $columns) . ') ' . 'VALUES (' . implode(', ', $values) . ')';
}
return $insertSql;
}
