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Meetup pg recherche fulltext ES -> PG

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Slides du meetup PG du 23 juin 2015 concernant le passage d'une recherche fulltext es à pg.

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  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
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  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
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Meetup pg recherche fulltext ES -> PG

  1. 1. La recherche fulltext : D’ES à PG 23 juin 2015
  2. 2. - Louise Grandjonc : dev. python - django à Novapost - PeopleDoc : dématerialisation de document RH (fiches de paye, factures, contrats etc.) - Pourquoi et comment sommes nous passés d’une recherche fulltext utilisant ES à PG? Introduction
  3. 3. I/ Contexte - La recherche Le produit : Coffre fort des salariés sur lequel ils reçoivent leurs fiches de paye
  4. 4. - Historiquement : recherche fulltext avec ES - Développement d’un nouveau coffre fort… Pas de remise en cause. I / Contexte
  5. 5. Côté déploiement… - Une machine avec ES à configurer - 7 millions de documents migrés pas encore indexés - Les distributions arrivent - Indexation à la main … C’est le chaos II / Les problèmes arrivent
  6. 6. Côté dev… - Manque de connaissance d’ES Fuzzy sur la recherche - Indexation en anglais uniquement (pas d’utilisation de stopwords pour les autres langues) … La recherche est mal faite, des documents manquent, les utilisateurs se plaignent... II / Les problèmes arrivent
  7. 7. ... L’expérience ES, finalement, pour nous c’était...
  8. 8. On en conclu : - Processus trop chaotique côté déploiement - Développement mal fait par manque de connaissance Mais en fait… On a vraiment besoin d’ES? II/ Les problèmes arrivent
  9. 9. Pourquoi alors ? - Postgresql déjà utilisé - Simplification du déploiement - Un spécialiste à la maison - Meilleure documentation pour les devs Comment alors... III/ PG à la rescousse
  10. 10. Il faut : - Les tsvectors (type postgresql): une liste de “mots” normalisés (fusion de différentes versions d’un mots, utilisation de stopwords avec la langue) dans lesquels on va rechercher. III/ PG à la rescousse - how to... SELECT 'a fat cat sat on a mat and ate a fat rat'::tsvector; tsvector ---------------------------------------------------- 'a' 'and' 'ate' 'cat' 'fat' 'mat' 'on' 'rat' 'sat' SELECT to_tsvector('english', 'The Fat Rats'); to_tsvector ----------------- 'fat':2 'rat':3 Pour les obtenir on utilise la fonction to_tsvector qui prend en argument la langue et la chaine de caractères.
  11. 11. - Un tsquery : liste des mots normalisés qui sont recherchés, les règles de recherches sont à définir selon le besoin. Les mots peuvent être reliés grâce à des OR, AND, NOT III/ PG à la rescousse - how to... SELECT 'fat & (rat | cat)'::tsquery; tsquery --------------------------- 'fat' & ( 'rat' | 'cat' ) Fonction plainto_tsquery : permet de prendre une chaîne non formattée en un faire un tsquery (uniquement en AND). SELECT plainto_tsquery('english', 'The Fat Rats'); plainto_tsquery ----------------- 'fat' & 'rat'
  12. 12. - Une table document_fulltext - lookup : tsvector - doc_id : foreign key - language : récupéré de la langue de l’utilisateur Lookup : III/ PG à la rescousse setweight(to_tsvector(lang::regconfig, COALESCE(doc.title, doc.name)::text), 'A') || setweight(to_tsvector(lang::regconfig, COALESCE(profile, '')), 'C') || ...
  13. 13. - La table remplie et mise à jour grâce à des triggers - Indexs par langue : CREATE INDEX document_fulltext_ts_french_idx ON document_fulltext USING gin(lookup) WHERE lang='french'; III/ PG à la rescousse
  14. 14. Recherche avec un seul JOIN entre la table document et document_fulltext III/ PG à la rescousse WITH queries AS ( SELECT plainto_tsquery(df.lang::regconfig, 'bulletin salaire') AS query, df.doc_id FROM document_fulltext df, document_document d WHERE df.doc_id = d.id AND d.user_id = 2 ) SELECT d.name, d.title, ts_rank_cd(df.lookup, queries.query) AS rank FROM document_document d, document_fulltext df, queries WHERE df.lookup @@ queries.query AND df.doc_id = queries.doc_id AND d.id = queries.doc_id;
  15. 15. Avant... Et le résultat...
  16. 16. Après... Et le résultat...
  17. 17. - Initialisation de la table simple et rapide via un script - Plus de tâches d’indexation à gérer grâce aux triggers - Développement simple grâce à la collaboration DBA/dev. Conclusion
  18. 18. Des questions ?

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