Question

Does it make it perform better overall to break this WHERE IN into many selects e.g

SELECT aField FROM aTable WHERE objectId IN (0,1,2...999) * many

Compared to having a huge WHERE objectId IN (700k items).

Edit—

The list of objectIds I have in memory and it can be as many as 700k items. They can be continuous but very unlikely.
It is also not determinant whether the field in the where clause (objectId in this case) is indexed or not.

The third party application that allows me to pass only a WHERE CLAUSE is currently using an Oracle DB. It also has options to connect to other types of DBs but the user base of the plugin I’m developing works mostly against an Oracle DB.

Answer 1

As many as 700k items? If that’s the case I’d seriously consider storing these in a separate table and using a JOIN instead – that would perform much better if objectId is an indexed foreign key.