| Matthias Andreas Benkard | 36b0f04 | 2021-02-27 10:46:04 +0100 | [diff] [blame^] | 1 | = Highly Efficient Enterprise Data Access |
| 2 | Matthias Andreas Benkard |
| 3 | // Meta |
| 4 | :experimental: |
| 5 | :data-uri: |
| 6 | :sectnums: |
| 7 | :toc: |
| 8 | :stem: |
| 9 | :toclevels: 2 |
| 10 | :description: Slides for my Hibernate Patterns and Antipatterns talk |
| 11 | :keywords: mulk |
| 12 | // Settings |
| 13 | :icons: font |
| 14 | :source-highlighter: rouge |
| 15 | |
| 16 | |
| 17 | [source,sql] |
| 18 | ---- |
| 19 | Hibernate: |
| 20 | select |
| 21 | post0_.id as id1_4_0_, |
| 22 | comments1_.id as id1_3_1_, |
| 23 | category3_.id as id1_2_2_, |
| 24 | post0_.author_id as author_i5_4_0_, |
| 25 | post0_.body as body2_4_0_, |
| 26 | post0_.publication_date as publicat3_4_0_, |
| 27 | post0_.title as title4_4_0_, |
| 28 | comments1_.author_name as author_n2_3_1_, |
| 29 | comments1_.post_id as post_id6_3_1_, |
| 30 | comments1_.publication_date as publicat3_3_1_, |
| 31 | comments1_.spam_status as spam_sta4_3_1_, |
| 32 | comments1_.text as text5_3_1_, |
| 33 | comments1_.post_id as post_id6_3_0__, |
| 34 | comments1_.id as id1_3_0__, |
| 35 | category3_.name as name2_2_2_, |
| 36 | categories2_.post_id as post_id1_5_1__, |
| 37 | categories2_.categories_id as categori2_5_1__ |
| 38 | from |
| 39 | post post0_ |
| 40 | left outer join |
| 41 | comment comments1_ |
| 42 | on post0_.id=comments1_.post_id |
| 43 | left outer join |
| 44 | post_category categories2_ |
| 45 | on post0_.id=categories2_.post_id |
| 46 | left outer join |
| 47 | category category3_ |
| 48 | on categories2_.categories_id=category3_.id; |
| 49 | ---- |
| 50 | |
| 51 | [source] |
| 52 | ---- |
| 53 | [2021-02-27 10:32:58] 60 rows retrieved starting from 1 in 263 ms (execution: 12 ms, fetching: 251 ms) |
| 54 | |
| 55 | ; 60 = #posts (10) x #comments/post (3) x #categories (2) |
| 56 | ; cartesian explosion! |
| 57 | ---- |
| 58 | |
| 59 | [source,sql] |
| 60 | ---- |
| 61 | post_id com_id cat_id aut_id body pubdate title author_name postid2 com_pubdate spamp com_text postid3 com_id cat_name postid4 cat_id |
| 62 | 4 16 44 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133969 UNKNOWN First post 4 16 Category #1 4 44 |
| 63 | 4 15 44 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133963 UNKNOWN First post 4 15 Category #1 4 44 |
| 64 | 4 14 44 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133870 UNKNOWN First post 4 14 Category #1 4 44 |
| 65 | 4 16 45 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133969 UNKNOWN First post 4 16 Category #0 4 45 |
| 66 | 4 15 45 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133963 UNKNOWN First post 4 15 Category #0 4 45 |
| 67 | 4 14 45 1 "" 2021-02-27 10:32:16.129627 Post #0 Anonymous Coward 4 2021-02-27 10:32:16.133870 UNKNOWN First post 4 14 Category #0 4 45 |
| 68 | 5 19 44 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135200 UNKNOWN First post 5 19 Category #1 5 44 |
| 69 | 5 18 44 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135192 UNKNOWN First post 5 18 Category #1 5 44 |
| 70 | 5 17 44 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135205 UNKNOWN First post 5 17 Category #1 5 44 |
| 71 | 5 19 45 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135200 UNKNOWN First post 5 19 Category #0 5 45 |
| 72 | 5 18 45 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135192 UNKNOWN First post 5 18 Category #0 5 45 |
| 73 | 5 17 45 2 "" 2021-02-27 10:32:16.129674 Post #1 Anonymous Coward 5 2021-02-27 10:32:16.135205 UNKNOWN First post 5 17 Category #0 5 45 |
| 74 | 6 22 44 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136043 UNKNOWN First post 6 22 Category #1 6 44 |
| 75 | 6 21 44 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136038 UNKNOWN First post 6 21 Category #1 6 44 |
| 76 | 6 20 44 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136031 UNKNOWN First post 6 20 Category #1 6 44 |
| 77 | 6 22 45 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136043 UNKNOWN First post 6 22 Category #0 6 45 |
| 78 | 6 21 45 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136038 UNKNOWN First post 6 21 Category #0 6 45 |
| 79 | 6 20 45 3 "" 2021-02-27 10:32:16.129700 Post #2 Anonymous Coward 6 2021-02-27 10:32:16.136031 UNKNOWN First post 6 20 Category #0 6 45 |
| 80 | 7 25 44 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136904 UNKNOWN First post 7 25 Category #1 7 44 |
| 81 | 7 24 44 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136897 UNKNOWN First post 7 24 Category #1 7 44 |
| 82 | 7 23 44 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136909 UNKNOWN First post 7 23 Category #1 7 44 |
| 83 | 7 25 45 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136904 UNKNOWN First post 7 25 Category #0 7 45 |
| 84 | 7 24 45 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136897 UNKNOWN First post 7 24 Category #0 7 45 |
| 85 | 7 23 45 1 "" 2021-02-27 10:32:16.129724 Post #3 Anonymous Coward 7 2021-02-27 10:32:16.136909 UNKNOWN First post 7 23 Category #0 7 45 |
| 86 | 8 28 44 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137743 UNKNOWN First post 8 28 Category #1 8 44 |
| 87 | 8 27 44 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137739 UNKNOWN First post 8 27 Category #1 8 44 |
| 88 | 8 26 44 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137731 UNKNOWN First post 8 26 Category #1 8 44 |
| 89 | 8 28 45 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137743 UNKNOWN First post 8 28 Category #0 8 45 |
| 90 | 8 27 45 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137739 UNKNOWN First post 8 27 Category #0 8 45 |
| 91 | 8 26 45 2 "" 2021-02-27 10:32:16.129746 Post #4 Anonymous Coward 8 2021-02-27 10:32:16.137731 UNKNOWN First post 8 26 Category #0 8 45 |
| 92 | 9 31 44 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138536 UNKNOWN First post 9 31 Category #1 9 44 |
| 93 | 9 30 44 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138548 UNKNOWN First post 9 30 Category #1 9 44 |
| 94 | 9 29 44 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138543 UNKNOWN First post 9 29 Category #1 9 44 |
| 95 | 9 31 45 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138536 UNKNOWN First post 9 31 Category #0 9 45 |
| 96 | 9 30 45 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138548 UNKNOWN First post 9 30 Category #0 9 45 |
| 97 | 9 29 45 3 "" 2021-02-27 10:32:16.129767 Post #5 Anonymous Coward 9 2021-02-27 10:32:16.138543 UNKNOWN First post 9 29 Category #0 9 45 |
| 98 | 10 34 44 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139349 UNKNOWN First post 10 34 Category #1 10 44 |
| 99 | 10 33 44 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139354 UNKNOWN First post 10 33 Category #1 10 44 |
| 100 | 10 32 44 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139337 UNKNOWN First post 10 32 Category #1 10 44 |
| 101 | 10 34 45 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139349 UNKNOWN First post 10 34 Category #0 10 45 |
| 102 | 10 33 45 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139354 UNKNOWN First post 10 33 Category #0 10 45 |
| 103 | 10 32 45 1 "" 2021-02-27 10:32:16.129789 Post #6 Anonymous Coward 10 2021-02-27 10:32:16.139337 UNKNOWN First post 10 32 Category #0 10 45 |
| 104 | 11 37 44 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140032 UNKNOWN First post 11 37 Category #1 11 44 |
| 105 | 11 36 44 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140025 UNKNOWN First post 11 36 Category #1 11 44 |
| 106 | 11 35 44 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140037 UNKNOWN First post 11 35 Category #1 11 44 |
| 107 | 11 37 45 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140032 UNKNOWN First post 11 37 Category #0 11 45 |
| 108 | 11 36 45 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140025 UNKNOWN First post 11 36 Category #0 11 45 |
| 109 | 11 35 45 2 "" 2021-02-27 10:32:16.129809 Post #7 Anonymous Coward 11 2021-02-27 10:32:16.140037 UNKNOWN First post 11 35 Category #0 11 45 |
| 110 | 12 40 44 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140766 UNKNOWN First post 12 40 Category #1 12 44 |
| 111 | 12 39 44 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140786 UNKNOWN First post 12 39 Category #1 12 44 |
| 112 | 12 38 44 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140779 UNKNOWN First post 12 38 Category #1 12 44 |
| 113 | 12 40 45 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140766 UNKNOWN First post 12 40 Category #0 12 45 |
| 114 | 12 39 45 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140786 UNKNOWN First post 12 39 Category #0 12 45 |
| 115 | 12 38 45 3 "" 2021-02-27 10:32:16.129839 Post #8 Anonymous Coward 12 2021-02-27 10:32:16.140779 UNKNOWN First post 12 38 Category #0 12 45 |
| 116 | 13 43 44 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141651 UNKNOWN First post 13 43 Category #1 13 44 |
| 117 | 13 42 44 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141655 UNKNOWN First post 13 42 Category #1 13 44 |
| 118 | 13 41 44 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141642 UNKNOWN First post 13 41 Category #1 13 44 |
| 119 | 13 43 45 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141651 UNKNOWN First post 13 43 Category #0 13 45 |
| 120 | 13 42 45 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141655 UNKNOWN First post 13 42 Category #0 13 45 |
| 121 | 13 41 45 1 "" 2021-02-27 10:32:16.129860 Post #9 Anonymous Coward 13 2021-02-27 10:32:16.141642 UNKNOWN First post 13 41 Category #0 13 45 |
| 122 | ---- |