… warehouse had the table which was had data merged into it with INSERT ON DUPLICATE KEY UPDATE statements. The performance was extremely slow. I turned…) partitions got data inserted to them per insert statement. As I tested the UPDATE path on INSERT OF DUPLICATE KEY UPDATE (adding ON DUPLICATE KEY UPDATE set c=c…
Comment: INSERT ON DUPLICATE KEY UPDATE and REPLACE INTO
January 22, 2007 By 15 Comments
…> insert into p values (1,1), (2,2); Query OK, 2 rows affected (0.00 sec) Records: 2 Duplicates: 0 Warnings: 0 mysql> insert into c values (1,1), (2,2); Query OK, 2 rows affected (0.00 sec) Records: 2 Duplicates… sec) — We lost the child #1. mysql> insert into p (id, notid) values (2,20) on duplicate key update notid=20; Query OK, 2 rows…
Post: On Character Sets and Disappearing Tables
June 21, 2012 By 1 Comment
… TABLE bar drop j; ERROR 1025 (HY000): Error on rename of ‘./foobar/#sql-3c13_11′ to ‘./… key, index(fkfrom1), index(fkfrom2), foreign key (fkto1) references dos1(fkfrom3) ) engine=innodb character set=utf8; INSERT INTO …1 row affected (0.09 sec) Records: 1 Duplicates: 0 Warnings: 0 But suppose that …
Post: Distributed Set Processing with Shard-Query
May 14, 2011 By 27 Comments
… we are projecting results, this is naturally an INSERT-only workload. The insertions into the base table from each node correspond logically to… a UNIQUE CHECK * on the base table: `origin_airport_id` * storage node result set merge optimization enabled: ON DUPLICATE KEY UPDATE `origin_airport_id…
Post: The story of one MySQL Upgrade
October 8, 2010 By 8 Comments
… also seen causing upgrade problems in number of other environments. INSERT ON DUPLICATE KEY UPDATE had a unfair share of replication issues in MySQL… used. Happily there are only few INSERT ON DUPLICATE KEY UPDATE query instances, and only one of them into table with AUTO_INCREMENT column (and…
Comment: INSERT ON DUPLICATE KEY UPDATE and summary counters.
August 4, 2008 By 48 Comments
… key) is duplicate or not,if it duplicate then update the record else insert that LAN No. I did it in the following way. insert into… from viewromappingfinal on duplicate key update LAN=values(LAN) it’s working fine if i won’t use romappingfinalid(table primary key). Suggest me how to use the INSERT ON UPDATE KEY using a table primary key but checking the condition on another primary key(LAN).
Comment: INSERT ON DUPLICATE KEY UPDATE and summary counters.
July 15, 2008 By 48 Comments
… == 0) mysql_query(“INSERT INTO table VALUES (’1′, ’1′)”); 3) Using INSERT .. ON duplicate KEY UPDATE .. mysql_query(“INSERT INTO table VALUES (’1′, ’1′) ON duplicate KEY UPDATE user_hits = user_hits+1 “); So.. which one is recommended? I repeat.. my update rate is higher than the insert…
Comment: Why MySQL could be slow with large tables ?
September 24, 2008 By 141 Comments
… pairs into a table with 3 columns (id1, id2, cnt) (where the pair id1, id2 forms the primary key) using INSERT … ON DUPLICATE KEY UPDATE cnt… the table into several smaller tables of equal structure and select the table to insert to by calculating a hash-value on (id1… some concurrency related checks (as I have exactly one process inserting into the table, which I could even stop when I want…
Comment: INSERT ON DUPLICATE KEY UPDATE and summary counters.
November 20, 2008 By 48 Comments
… add duplicate key the insert not work that not work now someone know my little erreur? //create and execute the query $sql = “INSERT INTO yah_unlimited (data_key,data_value,agent_id,data_group,access_time) VALUES (‘$key‘, ‘$value’, ‘$group’, ‘$owner_id’, NOW()) ON DUPLICATE KEY UPDATE access…
Comment: INSERT ON DUPLICATE KEY UPDATE and summary counters.
June 30, 2006 By 48 Comments
[...] use INSERT ON DUPLICATE KEY UPDATE (via MySQL Performance Blog): my $ret = $dbh->do(“INSERT INTO ipstat VALUES(inet_aton(’192.168.0.1′),1,now()) ON duplicate KEY UPDATE hits=hits+1″); Note: ip should be a primary key in this case [...]
