Re-implements SQL support with sessions#124

Merged

kzidane merged 9 commits intomasterfrom

Aug 19, 2020

Commits on Jun 4, 2020

Use sessions to handle transactions, allowing for both auto and manual
jsarchibald
committed
Style fixes. Minor design improvements, including removing SQL class URL variable, and always committing session so as to release locks.
jsarchibald
committed
Fix sql.py in tests for Travis CI.
jsarchibald
committed

Commits on Jun 5, 2020

Requested changes to code design, including some renaming, a new instance variable to track transaction status, and retaining session between calls to execute, among other things.
jsarchibald
committed
Messed up the tests for Travis CI again. Fixed.
jsarchibald
committed

Commits on Jun 11, 2020

Stylistic changes.
jsarchibald
committed

Commits on Jun 12, 2020