Grisha Kruglov 29a79ad111 Bug 1291821 - Move bulk insert logic for new history to BrowserProvider r=rnewman ... This commit does two things: 1) It simplifies history insertion logic, which wrongly assumed that history which was being inserted might be not new. As such, it was necessary to check for collisions of visit inserts, record number of visits actually inserted, and update remote visit counts correspondingly in a separate step, making history insert a three step operation (insert history record, insert its visits, update history record with a count). However, bulkInsert runs only for records which were determined to be entirely new, so it's possible to drop the third step. 2) Makes all of the insertions (history records and their visits) run in one transaction. Prepared statements for both history and visit inserts are used are used as a performance optimization measure. MozReview-Commit-ID: 48T4G5IsQNS --HG-- extra : rebase_source : 280d468ef9b57163a178e42707aee610977625c4		2016-11-29 13:42:53 -08:00
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gecko	Bug 1291821 - Move bulk insert logic for new history to BrowserProvider r=rnewman	2016-11-29 13:42:53 -08:00