Mysql左连接未使用现有外键
我在执行简单的左连接时遇到问题 我提供了一个简单的版本，首先突出我的问题，然后是这个问题的背景 当我运行Mysql左连接未使用现有外键,mysql,join,indexing,explain,my.cnf,Mysql,Join,Indexing,Explain,My.cnf,我在执行简单的左连接时遇到问题 我提供了一个简单的版本，首先突出我的问题，然后是这个问题的背景 当我运行EXPLAIN SELECT*FROM Feature f LEFT JOIN Feature\u translations\t ON f.id=t.object\u id时，我得到了以下结果： +----+-------------+-------+------+---------------------------+------+---------+------+--------+----
EXPLAIN SELECT*FROM Feature f LEFT JOIN Feature\u translations\t ON f.id=t.object\u id+----+-------------+-------+------+---------------------------+------+---------+------+--------+----------------------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+------+---------------------------+------+---------+------+--------+----------------------------------------------------+
| 1 | SIMPLE | f | ALL | NULL | NULL | NULL | NULL | 249200 | NULL |
| 1 | SIMPLE | t | ALL | IDX_7ED26C14232D562B,olol | NULL | NULL | NULL | 1 | Using where; Using join buffer (Block Nested Loop) |
+----+-------------+-------+------+---------------------------+------+---------+------+--------+----------------------------------------------------+
CREATE TABLE IF NOT EXISTS `Feature` (
`id` int(11) NOT NULL,
`site_id` int(11) NOT NULL,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`clientId` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`signature` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL
) ENGINE=InnoDB AUTO_INCREMENT=1866705 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
ALTER TABLE `Feature`
ADD PRIMARY KEY (`id`), ADD UNIQUE KEY `UNIQ_D06A4CFAF6BD1646AE880141` (`site_id`,`signature`), ADD KEY `IDX_D06A4CFAF6BD1646` (`site_id`), ADD KEY `IDX_D06A4CFAAE880141F6BD1646` (`signature`,`site_id`), ADD KEY `IDX_D06A4CFAEA1CE9BEF6BD1646` (`clientId`,`site_id`);
谢谢大家!
上下文 他们认为这个请求来自一个更大的请求。我在使用条令，我试着在我用过的表上使用一个大连接。这项工作很好，但有3个表，大大降低了我的表现。在这种情况下使用联接的性能低于多个请求 我想要运行的请求是
SELECT * FROM Product p1_ INNER JOIN Poi p0_ ON p1_.id = p0_.id INNER JOIN Site s42_ ON p0_.site_id = s42_.id LEFT JOIN PoiLogoLink p2_ ON p0_.id = p2_.poi_id LEFT JOIN File f3_ ON p2_.file_id = f3_.id LEFT JOIN PoiPictureLink p4_ ON p0_.id = p4_.poi_id LEFT JOIN File f5_ ON p4_.file_id = f5_.id LEFT JOIN poi_translations p6_ ON p0_.id = p6_.object_id LEFT JOIN CustomObject c7_ ON p0_.id = c7_.poi_id LEFT JOIN Picto p8_ ON c7_.id = p8_.id LEFT JOIN Label l9_ ON c7_.id = l9_.id LEFT JOIN custom_objects_translations c10_ ON c7_.id = c10_.object_id LEFT JOIN category_poi c43_ ON p0_.id = c43_.poi_id LEFT JOIN Category c11_ ON c11_.id = c43_.category_id LEFT JOIN category_translations c12_ ON c11_.id = c12_.object_id LEFT JOIN place_poi p44_ ON p0_.id = p44_.poi_id LEFT JOIN Place p13_ ON p13_.id = p44_.place_id LEFT JOIN PoiLink p14_ ON p0_.id = p14_.childId LEFT JOIN Poi p15_ ON p14_.parentId = p15_.id LEFT JOIN Person p16_ ON p15_.id = p16_.id LEFT JOIN Store s17_ ON p15_.id = s17_.id LEFT JOIN Product p18_ ON p15_.id = p18_.id LEFT JOIN Exhibitor e19_ ON p15_.id = e19_.id LEFT JOIN Room r20_ ON p15_.id = r20_.id LEFT JOIN Service s21_ ON p15_.id = s21_.id LEFT JOIN PoiLink p22_ ON p0_.id = p22_.parentId LEFT JOIN Poi p23_ ON p22_.childId = p23_.id LEFT JOIN Person p24_ ON p23_.id = p24_.id LEFT JOIN Store s25_ ON p23_.id = s25_.id LEFT JOIN Product p26_ ON p23_.id = p26_.id LEFT JOIN Exhibitor e27_ ON p23_.id = e27_.id LEFT JOIN Room r28_ ON p23_.id = r28_.id LEFT JOIN Service s29_ ON p23_.id = s29_.id LEFT JOIN poi_translations p30_ ON p23_.id = p30_.object_id LEFT JOIN PoiMediaLink p31_ ON p0_.id = p31_.poi_id LEFT JOIN Media m32_ ON p31_.media_id = m32_.id LEFT JOIN MediaText m33_ ON m32_.id = m33_.id LEFT JOIN MediaImage m34_ ON m32_.id = m34_.id LEFT JOIN MediaVideo m35_ ON m32_.id = m35_.id LEFT JOIN MediaPdf m36_ ON m32_.id = m36_.id LEFT JOIN Movie m37_ ON m32_.id = m37_.id LEFT JOIN MediaUrl m38_ ON m32_.id = m38_.id LEFT JOIN media_translations m39_ ON m32_.id = m39_.object_id LEFT JOIN product_feature p45_ ON p1_.id = p45_.product_id LEFT JOIN Feature f40_ ON f40_.id = p45_.feature_id LEFT JOIN feature_translations f41_ ON f40_.id = f41_.object_id WHERE s42_.id IN (15) ORDER BY p0_.id ASC LIMIT 100 OFFSET 0;
100 rows in set (15,43 sec)
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------ +----------------------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+----------------------------------------------------+
| 1 | SIMPLE | s42_ | const | PRIMARY | PRIMARY | 4 | const | 1 | Using temporary; Using filesort |
| 1 | SIMPLE | p0_ | ref | PRIMARY,UNIQ_45F65936F6BD1646AE880141,IDX_45F65936F6BD1646 | IDX_45F65936F6BD1646 | 4 | const | 8875 | NULL |
| 1 | SIMPLE | p1_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p2_ | ref | IDX_7990D9C97EACE855 | IDX_7990D9C97EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f3_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p2_.file_id | 1 | NULL |
| 1 | SIMPLE | p4_ | ref | IDX_6CC279957EACE855 | IDX_6CC279957EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f5_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p4_.file_id | 1 | NULL |
| 1 | SIMPLE | p6_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | c7_ | ref | IDX_FE0561D77EACE855 | IDX_FE0561D77EACE855 | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p8_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | l9_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c10_ | ref | IDX_A653A52A232D562B | IDX_A653A52A232D562B | 5 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c43_ | ref | IDX_5879B28C7EACE855 | IDX_5879B28C7EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | c11_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c43_.category_id | 1 | NULL |
| 1 | SIMPLE | c12_ | ref | IDX_1C60F915232D562B | IDX_1C60F915232D562B | 5 | adsum.c11_.id | 1 | NULL |
| 1 | SIMPLE | p44_ | ref | IDX_720979277EACE855 | IDX_720979277EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | p13_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p44_.place_id | 1 | NULL |
| 1 | SIMPLE | p14_ | ref | IDX_64E377A92FD6B47 | IDX_64E377A92FD6B47 | 5 | adsum.p0_.id | 4 | NULL |
| 1 | SIMPLE | p15_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p14_.parentId | 1 | NULL |
| 1 | SIMPLE | p16_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s17_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p18_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | e19_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | r20_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s21_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p22_ | ref | IDX_64E377A910EE4CEE | IDX_64E377A910EE4CEE | 5 | adsum.p0_.id | 2 | NULL |
| 1 | SIMPLE | p23_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p22_.childId | 1 | NULL |
| 1 | SIMPLE | p24_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s25_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p26_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | e27_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | r28_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s29_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p30_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p31_ | ref | IDX_5D2C1AE27EACE855 | IDX_5D2C1AE27EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | m32_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p31_.media_id | 1 | NULL |
| 1 | SIMPLE | m33_ | ALL | PRIMARY | NULL | NULL | NULL | 1 | Using where; Using join buffer (Block Nested Loop) |
| 1 | SIMPLE | m34_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.m32_.id | 1 | NULL |
| 1 | SIMPLE | m35_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.m32_.id | 1 | NULL |
| 1 | SIMPLE | m36_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.m32_.id | 1 | NULL |
| 1 | SIMPLE | m37_ | ALL | PRIMARY | NULL | NULL | NULL | 1 | Using where; Using join buffer (Block Nested Loop) |
| 1 | SIMPLE | m38_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.m32_.id | 1 | NULL |
| 1 | SIMPLE | m39_ | ref | IDX_AF46700B232D562B | IDX_AF46700B232D562B | 5 | adsum.m32_.id | 1 | NULL |
| 1 | SIMPLE | p45_ | ref | PRIMARY,IDX_CE0E6ED64584665A | IDX_CE0E6ED64584665A | 4 | adsum.p0_.id | 2 | Using index |
| 1 | SIMPLE | f40_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p45_.feature_id | 1 | NULL |
| 1 | SIMPLE | f41_ | ALL | IDX_7ED26C14232D562B | NULL | NULL | NULL | 1 | Using where; Using join buffer (Block Nested Loop) |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+----------------------------------------------------+
SELECT * FROM Product p1_ INNER JOIN Poi p0_ ON p1_.id = p0_.id INNER JOIN Site s31_ ON p0_.site_id = s31_.id LEFT JOIN PoiLogoLink p2_ ON p0_.id = p2_.poi_id LEFT JOIN File f3_ ON p2_.file_id = f3_.id LEFT JOIN PoiPictureLink p4_ ON p0_.id = p4_.poi_id LEFT JOIN File f5_ ON p4_.file_id = f5_.id LEFT JOIN poi_translations p6_ ON p0_.id = p6_.object_id LEFT JOIN CustomObject c7_ ON p0_.id = c7_.poi_id LEFT JOIN Picto p8_ ON c7_.id = p8_.id LEFT JOIN Label l9_ ON c7_.id = l9_.id LEFT JOIN custom_objects_translations c10_ ON c7_.id = c10_.object_id LEFT JOIN category_poi c32_ ON p0_.id = c32_.poi_id LEFT JOIN Category c11_ ON c11_.id = c32_.category_id LEFT JOIN category_translations c12_ ON c11_.id = c12_.object_id LEFT JOIN place_poi p33_ ON p0_.id = p33_.poi_id LEFT JOIN Place p13_ ON p13_.id = p33_.place_id LEFT JOIN PoiLink p14_ ON p0_.id = p14_.childId LEFT JOIN Poi p15_ ON p14_.parentId = p15_.id LEFT JOIN Person p16_ ON p15_.id = p16_.id LEFT JOIN Store s17_ ON p15_.id = s17_.id LEFT JOIN Product p18_ ON p15_.id = p18_.id LEFT JOIN Exhibitor e19_ ON p15_.id = e19_.id LEFT JOIN Room r20_ ON p15_.id = r20_.id LEFT JOIN Service s21_ ON p15_.id = s21_.id LEFT JOIN PoiLink p22_ ON p0_.id = p22_.parentId LEFT JOIN Poi p23_ ON p22_.childId = p23_.id LEFT JOIN Person p24_ ON p23_.id = p24_.id LEFT JOIN Store s25_ ON p23_.id = s25_.id LEFT JOIN Product p26_ ON p23_.id = p26_.id LEFT JOIN Exhibitor e27_ ON p23_.id = e27_.id LEFT JOIN Room r28_ ON p23_.id = r28_.id LEFT JOIN Service s29_ ON p23_.id = s29_.id LEFT JOIN poi_translations p30_ ON p23_.id = p30_.object_id WHERE s31_.id IN (15) ORDER BY p0_.id ASC LIMIT 100 OFFSET 0;
100 rows in set (0,02 sec)
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+
| 1 | SIMPLE | s31_ | const | PRIMARY | PRIMARY | 4 | const | 1 | NULL |
| 1 | SIMPLE | p0_ | ref | PRIMARY,UNIQ_45F65936F6BD1646AE880141,IDX_45F65936F6BD1646 | IDX_45F65936F6BD1646 | 4 | const | 8875 | Using where |
| 1 | SIMPLE | p1_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p2_ | ref | IDX_7990D9C97EACE855 | IDX_7990D9C97EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f3_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p2_.file_id | 1 | NULL |
| 1 | SIMPLE | p4_ | ref | IDX_6CC279957EACE855 | IDX_6CC279957EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f5_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p4_.file_id | 1 | NULL |
| 1 | SIMPLE | p6_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | c7_ | ref | IDX_FE0561D77EACE855 | IDX_FE0561D77EACE855 | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p8_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | l9_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c10_ | ref | IDX_A653A52A232D562B | IDX_A653A52A232D562B | 5 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c32_ | ref | IDX_5879B28C7EACE855 | IDX_5879B28C7EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | c11_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c32_.category_id | 1 | NULL |
| 1 | SIMPLE | c12_ | ref | IDX_1C60F915232D562B | IDX_1C60F915232D562B | 5 | adsum.c11_.id | 1 | NULL |
| 1 | SIMPLE | p33_ | ref | IDX_720979277EACE855 | IDX_720979277EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | p13_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p33_.place_id | 1 | NULL |
| 1 | SIMPLE | p14_ | ref | IDX_64E377A92FD6B47 | IDX_64E377A92FD6B47 | 5 | adsum.p0_.id | 4 | NULL |
| 1 | SIMPLE | p15_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p14_.parentId | 1 | NULL |
| 1 | SIMPLE | p16_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s17_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p18_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | e19_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | r20_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s21_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p22_ | ref | IDX_64E377A910EE4CEE | IDX_64E377A910EE4CEE | 5 | adsum.p0_.id | 2 | NULL |
| 1 | SIMPLE | p23_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p22_.childId | 1 | NULL |
| 1 | SIMPLE | p24_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s25_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p26_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | e27_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | r28_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s29_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p30_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p23_.id | 1 | NULL |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+
SET optimizer\u switch='block\u nested\u loop=off'编辑 所有隐含的表结构都可以在中找到（主体post大小在stackoverflow上受到限制，但我认为sql转储更好）
编辑2
为了提供更多信息，好的，这不是一个很好的答案，但它可能会推动事情向前发展 对于
，从功能f中选择*左连接功能f.id=t.object\U id上的t- 除非你需要，否则不要说
LEFT
和id
必须具有相同的数据类型。（他们似乎是。）object\u id- 请提供
；您提供的内容不显示显示创建表
，它位于olol解释中
- 好的，这不是一个很好的答案，但它可能会推动事情向前发展
对于
，从功能f中选择*左连接功能f.id=t.object\U id上的t- 除非你需要，否则不要说
LEFT
和id
必须具有相同的数据类型。（他们似乎是。）object\u id- 请提供
；您提供的内容不显示显示创建表
，它位于olol解释中
EXPLAIN FORMAT=JSON SELECT粗略地说，“使用连接缓冲区（块嵌套循环）”意味着“将整个索引加载到“连接缓冲区”并使用它。”这不是重复访问索引。这是一个相对较新的特性，与旧代码相比通常非常快
因此，实际使用的是索引
您可以通过执行EXPLAIN FORMAT=JSON SELECT您好，谢谢您的回复。编辑原始问题以添加sql结构转储，以便查看所有隐含的表。您好，谢谢您的回答。编辑原始问题以添加sql结构转储，以便查看所有隐含的表。您好！感谢您的回复，我刚刚在问题中添加了JSON解释输出。我不知道该检查什么。事实上，我想我找到了问题所在（现在不是如何解决问题，但这是你给我的一个很好的提示！）。我的第一个请求是使用临时表和filesort。这似乎是由于使用块嵌套循环的表f41
。顺便说一下，我不知道为什么，但是m37
和m32
似乎没问题！当然缺少索引！你好感谢您的回复，我刚刚在问题中添加了JSON解释输出。我不知道该检查什么。事实上，我想我找到了问题所在（现在不是如何解决问题，但这是你给我的一个很好的提示！）。我的第一个请求是使用临时表和filesort。这似乎是由于使用块嵌套循环的表f41
。顺便说一下，我不知道为什么，但是m37
和m32
似乎没问题！当然缺少索引！
SELECT * FROM Product p1_ INNER JOIN Poi p0_ ON p1_.id = p0_.id INNER JOIN Site s31_ ON p0_.site_id = s31_.id LEFT JOIN PoiLogoLink p2_ ON p0_.id = p2_.poi_id LEFT JOIN File f3_ ON p2_.file_id = f3_.id LEFT JOIN PoiPictureLink p4_ ON p0_.id = p4_.poi_id LEFT JOIN File f5_ ON p4_.file_id = f5_.id LEFT JOIN poi_translations p6_ ON p0_.id = p6_.object_id LEFT JOIN CustomObject c7_ ON p0_.id = c7_.poi_id LEFT JOIN Picto p8_ ON c7_.id = p8_.id LEFT JOIN Label l9_ ON c7_.id = l9_.id LEFT JOIN custom_objects_translations c10_ ON c7_.id = c10_.object_id LEFT JOIN category_poi c32_ ON p0_.id = c32_.poi_id LEFT JOIN Category c11_ ON c11_.id = c32_.category_id LEFT JOIN category_translations c12_ ON c11_.id = c12_.object_id LEFT JOIN place_poi p33_ ON p0_.id = p33_.poi_id LEFT JOIN Place p13_ ON p13_.id = p33_.place_id LEFT JOIN PoiLink p14_ ON p0_.id = p14_.childId LEFT JOIN Poi p15_ ON p14_.parentId = p15_.id LEFT JOIN Person p16_ ON p15_.id = p16_.id LEFT JOIN Store s17_ ON p15_.id = s17_.id LEFT JOIN Product p18_ ON p15_.id = p18_.id LEFT JOIN Exhibitor e19_ ON p15_.id = e19_.id LEFT JOIN Room r20_ ON p15_.id = r20_.id LEFT JOIN Service s21_ ON p15_.id = s21_.id LEFT JOIN PoiLink p22_ ON p0_.id = p22_.parentId LEFT JOIN Poi p23_ ON p22_.childId = p23_.id LEFT JOIN Person p24_ ON p23_.id = p24_.id LEFT JOIN Store s25_ ON p23_.id = s25_.id LEFT JOIN Product p26_ ON p23_.id = p26_.id LEFT JOIN Exhibitor e27_ ON p23_.id = e27_.id LEFT JOIN Room r28_ ON p23_.id = r28_.id LEFT JOIN Service s29_ ON p23_.id = s29_.id LEFT JOIN poi_translations p30_ ON p23_.id = p30_.object_id WHERE s31_.id IN (15) ORDER BY p0_.id ASC LIMIT 100 OFFSET 0;
100 rows in set (0,02 sec)
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+
| 1 | SIMPLE | s31_ | const | PRIMARY | PRIMARY | 4 | const | 1 | NULL |
| 1 | SIMPLE | p0_ | ref | PRIMARY,UNIQ_45F65936F6BD1646AE880141,IDX_45F65936F6BD1646 | IDX_45F65936F6BD1646 | 4 | const | 8875 | Using where |
| 1 | SIMPLE | p1_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p2_ | ref | IDX_7990D9C97EACE855 | IDX_7990D9C97EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f3_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p2_.file_id | 1 | NULL |
| 1 | SIMPLE | p4_ | ref | IDX_6CC279957EACE855 | IDX_6CC279957EACE855 | 4 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | f5_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p4_.file_id | 1 | NULL |
| 1 | SIMPLE | p6_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | c7_ | ref | IDX_FE0561D77EACE855 | IDX_FE0561D77EACE855 | 5 | adsum.p0_.id | 1 | NULL |
| 1 | SIMPLE | p8_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | l9_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c10_ | ref | IDX_A653A52A232D562B | IDX_A653A52A232D562B | 5 | adsum.c7_.id | 1 | NULL |
| 1 | SIMPLE | c32_ | ref | IDX_5879B28C7EACE855 | IDX_5879B28C7EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | c11_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.c32_.category_id | 1 | NULL |
| 1 | SIMPLE | c12_ | ref | IDX_1C60F915232D562B | IDX_1C60F915232D562B | 5 | adsum.c11_.id | 1 | NULL |
| 1 | SIMPLE | p33_ | ref | IDX_720979277EACE855 | IDX_720979277EACE855 | 4 | adsum.p0_.id | 1 | Using index |
| 1 | SIMPLE | p13_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p33_.place_id | 1 | NULL |
| 1 | SIMPLE | p14_ | ref | IDX_64E377A92FD6B47 | IDX_64E377A92FD6B47 | 5 | adsum.p0_.id | 4 | NULL |
| 1 | SIMPLE | p15_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p14_.parentId | 1 | NULL |
| 1 | SIMPLE | p16_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s17_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p18_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | e19_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | r20_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | s21_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p15_.id | 1 | NULL |
| 1 | SIMPLE | p22_ | ref | IDX_64E377A910EE4CEE | IDX_64E377A910EE4CEE | 5 | adsum.p0_.id | 2 | NULL |
| 1 | SIMPLE | p23_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p22_.childId | 1 | NULL |
| 1 | SIMPLE | p24_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s25_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p26_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | e27_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | r28_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | s29_ | eq_ref | PRIMARY | PRIMARY | 4 | adsum.p23_.id | 1 | NULL |
| 1 | SIMPLE | p30_ | ref | IDX_9478F0F7232D562B | IDX_9478F0F7232D562B | 5 | adsum.p23_.id | 1 | NULL |
+----+-------------+-------+--------+------------------------------------------------------------+----------------------+---------+------------------------+------+-------------+