{"id":92,"date":"2003-05-05T01:53:42","date_gmt":"2003-05-05T06:53:42","guid":{"rendered":"http:\/\/www.flamingspork.com\/blog\/?p=92"},"modified":"2003-05-05T01:53:42","modified_gmt":"2003-05-05T06:53:42","slug":"computing-deltas-for-insert-operations","status":"publish","type":"post","link":"https:\/\/www.flamingspork.com\/blog\/2003\/05\/05\/computing-deltas-for-insert-operations\/","title":{"rendered":"computing deltas for insert operations"},"content":{"rendered":"<p>snapshot like system for in-progress transactions, when committing, search for common substrings in blocks and the offsets of these (possibly indicating an insert operation) and on a per-block basis create a &#8220;shift N spaces&#8221; entry in the delta fork of the object<\/p>\n","protected":false},"excerpt":{"rendered":"<p>snapshot like system for in-progress transactions, when committing, search for common substrings in blocks and the offsets of these (possibly indicating an insert operation) and on a per-block basis create a &#8220;shift N spaces&#8221; entry in the delta fork of &hellip; <a href=\"https:\/\/www.flamingspork.com\/blog\/2003\/05\/05\/computing-deltas-for-insert-operations\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[4],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","hentry","category-hons-project"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5a6n8-1u","jetpack-related-posts":[{"id":2282,"url":"https:\/\/www.flamingspork.com\/blog\/2011\/02\/04\/implicit-commit-considered-harmful\/","url_meta":{"origin":92,"position":0},"title":"Implicit COMMIT considered harmful.","author":"Stewart Smith","date":"2011-02-04","format":false,"excerpt":"If you execute the following, what does your RDBMS do? CREATE TABLE t1 (a int); START TRANSACTION; INSERT INTO t1 (a) VALUES (1); START TRANSACTION; INSERT INTO t1 (a) VALUES (2); ROLLBACK; SELECT * FROM t1; The answer may surprise you.","rel":"","context":"In &quot;drizzle&quot;","block_context":{"text":"drizzle","link":"https:\/\/www.flamingspork.com\/blog\/category\/work-et-al\/drizzle-work-et-al\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1853,"url":"https:\/\/www.flamingspork.com\/blog\/2010\/03\/16\/embedded-innodb-innodb-status\/","url_meta":{"origin":92,"position":1},"title":"Embedded InnoDB: InnoDB Status","author":"Stewart Smith","date":"2010-03-16","format":false,"excerpt":"Using the Embedded InnoDB plugin I'm working on, you can use the INNODB_STATUS table function in the data_dictionary, you can do pretty neat things. For example, we can see that each autocommit transaction causes an fsync and if you insert multiple rows ina \u00c2\u00a0single statement, you still only get 1\u2026","rel":"","context":"In &quot;drizzle&quot;","block_context":{"text":"drizzle","link":"https:\/\/www.flamingspork.com\/blog\/category\/work-et-al\/drizzle-work-et-al\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":761,"url":"https:\/\/www.flamingspork.com\/blog\/2006\/11\/22\/create-insert-select-drop-benchmark\/","url_meta":{"origin":92,"position":2},"title":"CREATE, INSERT, SELECT, DROP benchmark","author":"Stewart Smith","date":"2006-11-22","format":false,"excerpt":"Inspired by PeterZ's Opening Tables scalability post, I decided to try a little benchmark. This benchmark involved the following: Create 50,000 tables CREATE TABLE t{$i} (i int primary key) Insert one row into each table select * from each table drop each table I wanted to test file system impact\u2026","rel":"","context":"In &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/www.flamingspork.com\/blog\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1292,"url":"https:\/\/www.flamingspork.com\/blog\/2008\/12\/10\/stewart-learns-sql-oddities\/","url_meta":{"origin":92,"position":3},"title":"Stewart learns SQL oddities&#8230;","author":"Stewart Smith","date":"2008-12-10","format":false,"excerpt":"What would you expect the following to fail with? CREATE TABLE t1 (a int, b int); insert into t1 values (100,100); CREATE TEMPORARY TABLE t2 (a int, b int, primary key (a)); BEGIN; INSERT INTO t2 values(100,100); CREATE TEMPORARY TABLE IF NOT EXISTS t2 (primary key (a)) select * from\u2026","rel":"","context":"In &quot;mysql&quot;","block_context":{"text":"mysql","link":"https:\/\/www.flamingspork.com\/blog\/category\/work-et-al\/mysql\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3347,"url":"https:\/\/www.flamingspork.com\/blog\/2013\/05\/24\/an-old-note-on-the-storage-engine-api\/","url_meta":{"origin":92,"position":4},"title":"An old note on the Storage Engine API","author":"Stewart Smith","date":"2013-05-24","format":false,"excerpt":"Whenever I stick my head into the MySQL storage engine API, I'm reminded of a MySQL User Conference from several years ago now. Specifically, I'm reminded of a slide from an early talk at the MySQL User Conference by\u00c2\u00a0Paul McCullagh describing developing PBXT. For \"How to write a Storage Engine\u2026","rel":"","context":"In &quot;code&quot;","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":388,"url":"https:\/\/www.flamingspork.com\/blog\/2005\/04\/06\/feature-no-more-free-bitkeeper\/","url_meta":{"origin":92,"position":5},"title":"Feature: No More Free BitKeeper","author":"Stewart Smith","date":"2005-04-06","format":false,"excerpt":"Feature: No More Free BitKeeper Insert inspired-by-RMS rant about non-free software owning you. 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