While dereferencing a NULL pointer may be undefined, there’s a legitimate reason to do so: you want to store something at address 0. Why? Well, not all of us are fancy and have an MMU turned on.<\/p>\n","protected":false},"excerpt":{"rendered":"
While dereferencing a NULL pointer may be undefined, there’s a legitimate reason to do so: you want to store something at address 0. Why? Well, not all of us are fancy and have an MMU turned on.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[76],"tags":[138,684,685,683,682],"class_list":["post-4163","post","type-post","status-publish","format-standard","hentry","category-code","tag-c","tag-null","tag-pointer","tag-reality","tag-standard"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5a6n8-159","jetpack-related-posts":[{"id":1876,"url":"https:\/\/www.flamingspork.com\/blog\/2010\/04\/02\/the-drizzle-and-mysql-key-tuple-format\/","url_meta":{"origin":4163,"position":0},"title":"The Drizzle (and MySQL) Key tuple format","author":"Stewart Smith","date":"2010-04-02","format":false,"excerpt":"Here's something that's not really documented anywhere (unless you count ha_innodb.cc as a source of server documentation). You may have some idea about the MySQL\/Drizzle row buffer format. This is passed around the storage engine interface: in for write_row and update_row and out for the various scan and index read\u2026","rel":"","context":"In "drizzle"","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":1879,"url":"https:\/\/www.flamingspork.com\/blog\/2010\/05\/24\/using-the-row-buffer-in-drizzle-and-mysql\/","url_meta":{"origin":4163,"position":1},"title":"Using the row buffer in Drizzle (and MySQL)","author":"Stewart Smith","date":"2010-05-24","format":false,"excerpt":"Here's another bit of the API you may need to use in your storage engine (it also seems to be a rather unknown. I believe the only place where this has really been documented is ha_ndbcluster.cc, so here goes.... Drizzle (through inheritance from MySQL) has its own (in memory) row\u2026","rel":"","context":"In "drizzle"","block_context":{"text":"drizzle","link":"https:\/\/www.flamingspork.com\/blog\/category\/work-et-al\/drizzle-work-et-al\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2010\/04\/row-300x85.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1931,"url":"https:\/\/www.flamingspork.com\/blog\/2010\/05\/26\/blobs-in-the-drizzlemysql-storage-engine-api\/","url_meta":{"origin":4163,"position":2},"title":"BLOBS in the Drizzle\/MySQL Storage Engine API","author":"Stewart Smith","date":"2010-05-26","format":false,"excerpt":"Another (AFAIK) undocumented part of the Storage Engine API: We all know what a normal row looks like in Drizzle\/MySQL row format (a NULL bitmap and then column data): Nothing that special. It's a fixed sized buffer, Field objects reference into it, you read out of it and write the\u2026","rel":"","context":"In "drizzle"","block_context":{"text":"drizzle","link":"https:\/\/www.flamingspork.com\/blog\/category\/work-et-al\/drizzle-work-et-al\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2010\/05\/rect28161-300x67.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1576,"url":"https:\/\/www.flamingspork.com\/blog\/2009\/02\/25\/no-implicit-defaults\/","url_meta":{"origin":4163,"position":3},"title":"No implicit defaults","author":"Stewart Smith","date":"2009-02-25","format":false,"excerpt":"See also: MySQL Bug 43151 The MySQL Manual proudly states that you don't get implicit default values if strict mode. mysql> set sql_mode='STRICT_ALL_TABLES'; Query OK, 0 rows affected (0.00 sec) mysql> create table t1 (a int, b int, c int, d int, e int, f int, g int, h int,i\u2026","rel":"","context":"In "drizzle"","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":297,"url":"https:\/\/www.flamingspork.com\/blog\/2004\/11\/16\/implementing-the-nominations-stuff\/","url_meta":{"origin":4163,"position":4},"title":"implementing the nominations stuff","author":"Stewart Smith","date":"2004-11-16","format":false,"excerpt":"previously, we had the idea of an election candidate: create table election_candidate ( id serial unique not null, election_position_id int not null, approved boolean, member_id int not null, spiel text, CONSTRAINT \"election_candidate_pkey\" PRIMARY KEY (id), CONSTRAINT \"election_candidate_election_position_id_fkey\" FOREIGN KEY (org_id) references election_position(id) on update restrict, CONSTRAINT \"election_candidate_member_id\" FOREIGN KEY (member-id)\u2026","rel":"","context":"In "linux-aus"","block_context":{"text":"linux-aus","link":"https:\/\/www.flamingspork.com\/blog\/category\/linux-aus\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":261,"url":"https:\/\/www.flamingspork.com\/blog\/2004\/08\/22\/memberdb-voting-code-planning-in-some-sense-of-the-word\/","url_meta":{"origin":4163,"position":5},"title":"MemberDB Voting code (planning… in some sense of the word)","author":"Stewart Smith","date":"2004-08-22","format":false,"excerpt":"well... at some point there has to be some voting code done for MemberDB. Namely because Linux Australia has to have elections sometime early next year, and the code really should work before then! Currently, we can easily work out who is a current member of the organisation. Only current\u2026","rel":"","context":"In "linux-aus"","block_context":{"text":"linux-aus","link":"https:\/\/www.flamingspork.com\/blog\/category\/linux-aus\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/posts\/4163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/comments?post=4163"}],"version-history":[{"count":1,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/posts\/4163\/revisions"}],"predecessor-version":[{"id":4164,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/posts\/4163\/revisions\/4164"}],"wp:attachment":[{"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/media?parent=4163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/categories?post=4163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.flamingspork.com\/blog\/wp-json\/wp\/v2\/tags?post=4163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}