This change removes LEFT JOINS to improve the performance
when run against Moodle sites with very large data sets.
It will also cause some additional contexts to be returned:
1. When a user has modified a user_evidence_competency
without modifying its associated user_evidence record
This commit reviews all continue uses in core happening within a
loop / switch / case hierarchy. This does not cover:
- Changes to libraries. Will be handled in another issue / commit.
- Uses out from loops, will be reviewed by other commit.
The policy followed has been:
- When possible, take rid of the continue.
- When clearly the intention was to jump to next element in loop
change to continue 2
- When it was not clear, keep old behavior switching to break, no
matter how weird the behavior may be.
Neill Magill