I'm running some ETL jobs, where the pattern is the following: 1- Get some records from an external API,
2- For each record, see if its lastModified date > the lastModified i have in db (or if I don't have that record in db) 3- If lastModified < dbLastModified, the item wasn't changed, ignore it. Otherwise, run an update query and update that record. (It is rare for existing records to get updated, so I'm not that concerned about tombstones). The problem however is, since I have to query each record's lastModified, one at a time, that's adding a major bottleneck to my job. E.g if I have 6k records, I have to run a total of 6k 'select lastModified from myTable where id = ?' queries. Is there a better way, am I doing anything wrong, etc? Any suggestions would be appreciated. Thanks.
