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<?php
/**
* Table utilities.
*
* @package SqlParser
* @subpackage Utils
*/
namespace SqlParser\Utils;
use SqlParser\Statements\CreateStatement;
/**
* Table utilities.
*
* @category Statement
* @package SqlParser
* @subpackage Utils
* @author Dan Ungureanu <udan1107@gmail.com>
* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
*/
class Table
{
/**
* Gets the foreign keys of the table.
*
* @param CreateStatement $statement The statement to be processed.
*
* @return array
*/
public static function getForeignKeys($statement)
{
if ((empty($statement->fields))
|| (!is_array($statement->fields))
|| (!$statement->options->has('TABLE'))
) {
return array();
}
$ret = array();
foreach ($statement->fields as $field) {
if ((empty($field->key)) || ($field->key->type !== 'FOREIGN KEY')) {
continue;
}
$columns = array();
foreach ($field->key->columns as $column) {
$columns[] = $column['name'];
}
$tmp = array(
'constraint' => $field->name,
'index_list' => $columns,
);
if (!empty($field->references)) {
$tmp['ref_table_name'] = $field->references->table;
$tmp['ref_index_list'] = $field->references->columns;
if (($opt = $field->references->options->has('ON UPDATE'))) {
$tmp['on_update'] = str_replace(' ', '_', $opt);
}
if (($opt = $field->references->options->has('ON DELETE'))) {
$tmp['on_delete'] = str_replace(' ', '_', $opt);
}
// if (($opt = $field->references->options->has('MATCH'))) {
// $tmp['match'] = str_replace(' ', '_', $opt);
// }
}
$ret[] = $tmp;
}
return $ret;
}
/**
* Gets fields of the table.
*
* @param CreateStatement $statement The statement to be processed.
*
* @return array
*/
public static function getFields($statement)
{
if ((empty($statement->fields))
|| (!is_array($statement->fields))
|| (!$statement->options->has('TABLE'))
) {
return array();
}
$ret = array();
foreach ($statement->fields as $field) {
// Skipping keys.
if (empty($field->type)) {
continue;
}
$ret[$field->name] = array(
'type' => $field->type->name,
'timestamp_not_null' => false,
);
if ($field->options) {
if ($field->type->name === 'TIMESTAMP') {
if ($field->options->has('NOT NULL')) {
$ret[$field->name]['timestamp_not_null'] = true;
}
}
if (($option = $field->options->has('DEFAULT'))) {
$ret[$field->name]['default_value'] = $option;
if ($option === 'CURRENT_TIMESTAMP') {
$ret[$field->name]['default_current_timestamp'] = true;
}
}
if (($option = $field->options->has('ON UPDATE'))) {
if ($option === 'CURRENT_TIMESTAMP') {
$ret[$field->name]['on_update_current_timestamp'] = true;
}
}
if (($option = $field->options->has('AS'))) {
$ret[$field->name]['generated'] = true;
$ret[$field->name]['expr'] = $option;
}
}
}
return $ret;
}
}
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