|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* This class will use the Common Table Expression |
|
5
|
|
|
* technique to make a recursive request on the database. |
|
6
|
|
|
* On mysql it will fallback to a stored procedure doing the same. |
|
7
|
|
|
* |
|
8
|
|
|
* The choice of a Common Table Expression or a standard query is done automatically |
|
9
|
|
|
*/ |
|
10
|
|
|
namespace Rocket\Taxonomy\Utils; |
|
11
|
|
|
|
|
12
|
|
|
use Illuminate\Support\Facades\DB; |
|
13
|
|
|
|
|
14
|
|
|
/** |
|
15
|
|
|
* Class using the DB's internal Recursive query mechanism to query term hierarchies. |
|
16
|
|
|
*/ |
|
17
|
|
|
class CommonTableExpressionQuery extends RecursiveQuery implements RecursiveQueryInterface |
|
18
|
|
|
{ |
|
19
|
|
|
/** |
|
20
|
|
|
* Execute the query with the current PDO connection. |
|
21
|
|
|
* Will log the time taken manually |
|
22
|
|
|
* |
|
23
|
|
|
* @param string $raw_query |
|
24
|
|
|
* @param int $id |
|
25
|
|
|
* @return \Illuminate\Support\Collection |
|
26
|
|
|
*/ |
|
27
|
54 |
|
protected function runQuery($raw_query, $id) |
|
28
|
|
|
{ |
|
29
|
54 |
|
$query = str_replace(':id', $id, $raw_query); |
|
30
|
|
|
|
|
31
|
54 |
|
$start = microtime(true); |
|
32
|
|
|
|
|
33
|
|
|
// Does not work as a prepared statement; we have to execute it directly |
|
34
|
54 |
|
$results = DB::getReadPdo()->query($query)->fetchAll(\PDO::FETCH_OBJ); |
|
35
|
|
|
|
|
36
|
|
|
// Log the query manually |
|
37
|
54 |
|
DB::logQuery($raw_query, [$id], round((microtime(true) - $start) * 1000, 2)); |
|
38
|
|
|
|
|
39
|
54 |
|
return $results; |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* Prepare the complete query to run on the DB to get the data recursively. |
|
44
|
|
|
* |
|
45
|
|
|
* @param string $initial The initial query bootstrapping the recursive query |
|
46
|
|
|
* @param string $recursive The query to dig deeper in the hierarchy |
|
47
|
|
|
* @return string |
|
48
|
|
|
*/ |
|
49
|
54 |
|
protected function assembleQuery($initial, $recursive) |
|
50
|
|
|
{ |
|
51
|
54 |
|
$tmp_tbl = 'name_tree'; |
|
52
|
54 |
|
$recursive = str_replace(':tmp_tbl', $tmp_tbl, $recursive); |
|
53
|
|
|
|
|
54
|
54 |
|
$final = "select distinct * from $tmp_tbl"; |
|
55
|
|
|
|
|
56
|
54 |
|
if (DB::connection()->getDriverName() == 'mysql') { |
|
57
|
19 |
|
return "Call WITH_EMULATOR('$tmp_tbl', '$initial', '$recursive', '$final', 0, 'ENGINE=MEMORY');"; |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
35 |
|
return "WITH RECURSIVE $tmp_tbl AS ($initial UNION ALL $recursive) $final;"; |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
/** |
|
64
|
|
|
* Get all ancestors of a term |
|
65
|
|
|
* |
|
66
|
|
|
* @param int $id The term ID |
|
67
|
|
|
* @return \Illuminate\Support\Collection |
|
68
|
|
|
*/ |
|
69
|
30 |
|
public function getAncestry($id) |
|
70
|
|
|
{ |
|
71
|
30 |
|
$tbl = $this->hierarchyTable; |
|
72
|
30 |
|
$recursive = "SELECT c.term_id, c.parent_id from $tbl as c join :tmp_tbl as p on p.parent_id = c.term_id"; |
|
73
|
|
|
|
|
74
|
30 |
|
$raw_query = $this->assembleQuery($this->getAncestryInitialQuery(), $recursive); |
|
75
|
|
|
|
|
76
|
30 |
|
return $this->runQuery($raw_query, $id); |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
|
|
/** |
|
80
|
|
|
* Get all descendants of a term. |
|
81
|
|
|
* |
|
82
|
|
|
* @param int $id The term ID |
|
83
|
|
|
* @return \Illuminate\Support\Collection |
|
84
|
|
|
*/ |
|
85
|
30 |
|
public function getDescent($id) |
|
86
|
|
|
{ |
|
87
|
30 |
|
$tbl = $this->hierarchyTable; |
|
88
|
30 |
|
$recursive = "SELECT c.term_id, c.parent_id from $tbl as c join :tmp_tbl as p on c.parent_id = p.term_id"; |
|
89
|
|
|
|
|
90
|
30 |
|
$raw_query = $this->assembleQuery($this->getDescentInitialQuery(), $recursive); |
|
91
|
|
|
|
|
92
|
30 |
|
return $this->runQuery($raw_query, $id); |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
RocketPropelledTortoise /
Core
