/**
* Parses statement source.
* @return string
*/
protected function parseSource()
{
if (!$this->stmt instanceof Result) {
return $this->escapeValue($this->stmt->getTable(), Manager::IDENTIFIER);
}
// Simple table
if ($this->stmt->getTable() !== null) {
$source = $this->escapeValue($this->stmt->getTable(), Manager::IDENTIFIER);
} else {
$subq = $this->stmt->getSource();
$alias = $this->escapeValue($subq->getAlias() ? $subq->getAlias() : '_table_', Manager::IDENTIFIER);
$source = "(\n\t" . implode("\n\t", explode("\n", $subq)) . "\n) {$alias}";
}
$source = $this->tryDelimite($source);
// JOINs
foreach ($this->stmt->getJoins() as $key => $join) {
list($join_source, $cond, $type) = $join;
// JOIN sub-select
if ($join_source instanceof Result) {
$join_alias = $this->escapeValue($join_source->getAlias() ? $join_source->getAlias() : '_join_' . ($key + 1), Manager::IDENTIFIER);
$join_source = "(\n\t" . implode("\n\t", explode("\n", $join_source)) . "\n) {$join_alias}";
} elseif ($join_source instanceof Literal) {
$join_source = $join_source->value;
} elseif (is_scalar($join_source)) {
$join_source = $this->parseFieldName($join_source, true);
}
$type = strtoupper(substr($type, 5));
$type .= $type === '' ? '' : ' ';
$source .= $cond instanceof Literal ? "\n{$type}JOIN {$join_source} ON {$cond->value}" : $this->tryDelimite("\n{$type}JOIN {$join_source} ON {$cond}");
}
return $source;
}
/**
* Returns full table name (with prefix) if available.
* @return string|null
*/
public function getTable()
{
if ($this->source instanceof self) {
return null;
}
return parent::getTable();
}
