Port fixes for multiple evaluation of constants from MySQL

Registered by Dennis Schön

The fixes are to ensure items in the parsed syntax tree which evaluate to a constant (such as UNIX_TIMESTAMP(constant) are only evaluated once and then cached in the Lex as a Item_cached_xxx object. (--> MySQL Bug#33546)

Blueprint information

Status:
Complete
Approver:
Jay Pipes
Priority:
Medium
Drafter:
Dennis Schön
Direction:
Approved
Assignee:
Dennis Schön
Definition:
Approved
Series goal:
None
Implementation:
Implemented
Milestone target:
milestone icon bell
Started by
Dennis Schön
Completed by
Jay Pipes

Sprints

Whiteboard

(?)

Work Items

This blueprint contains Public information 
Everyone can see this information.