Bug #120736 FORCE INDEX make a query with OR (NOT NULL column <=> NULL) degrade from an index range scan to a full table scan
Submitted: 22 Jun 6:46
Reporter: Frank Ma Email Updates:
Status: Open Impact on me:
None 
Category:MySQL Server: Optimizer Severity:S3 (Non-critical)
Version:9.6.0 OS:Any
Assigned to: CPU Architecture:Any

File: Maximum allowed size is 50MB.
Description:
Privacy:

If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.

To split a large file: