Sqlite upsert update#

We don't have any logic to convert integers into strings, strings into integers, etc. Gotchas No automatic typecasting beyond what the adapter/driver provides

And you don't have to put all of the rows to be upserted into a single huge array - you can batch them using Upsert.batch. import columns, all_values, :timestamps => false, :on_duplicate_key_update => columnsĪctiverecord-import, however, only works on MySQL and requires ActiveRecord-and if all you are doing is upserts, upsert is tested to be 40% faster. I slightly modified it so that it only retries once - don't want infinite loops.

Sqlite upsert update#

Do nothing, and loop to try the UPDATE again. not there, so try to insert the key - if someone else inserts the same key concurrently, - we could get a unique-key failure BEGIN INSERT INTO 'pets '( 'name ', 'tag_number ') VALUES ( 'name_set ', 'tag_number_set ') first try to update the key UPDATE 'pets ' SET 'name ' = 'name_set ', 'tag_number ' = 'tag_number_set ' WHERE 'name ' = 'name_sel ' AND 'tag_number ' = 'tag_number_sel ' INSERT INTO table_name (a, b) VALUES (k, data) INSERT INTO `pets ` ( `name `, `tag_number `) VALUES ( `name_set `, `tag_number_set `) ĬREATE OR REPLACE FUNCTION upsert_pets_SEL_name_A_tag_number_SET_name_A_tag_number( 'name_sel ' character varying( 255), 'tag_number_sel ' integer, 'name_set ' character varying( 255), 'tag_number_set ' integer) RETURNS VOID AS UPDATE table_name SET b = b_SET WHERE a = a_SEL UPDATE `pets ` SET `name ` = `name_set `, `tag_number ` = `tag_number_set ` WHERE `name ` = `name_sel ` AND `tag_number ` = `tag_number_sel ` But the handler above will take care of that. If a concurrent INSERT is made after - the SELECT but before the INSERT below we'll get a duplicate - key error. SELECT COUNT( *) INTO FROM `pets ` WHERE `name ` = `name_sel ` AND `tag_number ` = `tag_number_sel ` Reset the sentinel - and try again.ĭECLARE ER_DUP_UNIQUE CONDITION FOR 23000 ĭECLARE CONTINUE HANDLER FOR ER_DUP_UNIQUE BEGIN SET done = FALSE ĭECLARE CONTINUE HANDLER FOR ER_INTEG BEGIN SET done = TRUE CREATE PROCEDURE upsert_pets_SEL_name_A_tag_number_SET_name_A_tag_number( `name_sel ` varchar( 255), `tag_number_sel ` int( 11), `name_set ` varchar( 255), `tag_number_set ` int( 11))īEGIN - If there is a unique key constraint error then - someone made a concurrent insert.