2) Fix an issue where Explain and Explain Analyze are not working, it's regression of #1760. Fixes#4484
3) Fix an issue where Filter toolbar button is not working in view/edit data, it's regression of keyboard navigation. Fixes#4485
When a query is run in the Query Tool, check if the source of the columns
can be identified as being from a single table, and that we have all
columns that make up the primary key. If so, consider the resultset to
be editable and allow the user to edit data and add/remove rows in the
grid. Changes to data are saved using SAVEPOINTs as part of any
transaction that's in progress, and rolled back if there are integrity
violations, without otherwise affecting the ongoing transaction.
Implemented by Yosry Muhammad as a Google Summer of Code project.
Highlights of this patch include:
- Changes will affect SQL Editors in Create dialog boxes, SQL tab of the main screen, Query tool, History entries in the query tool, Query tool opened in New Tab/Window
- All the components of SQL editor will refer to single source of preferences which is cached in the Browser object. All other redundant ajax get preference calls are removed.
- SQL editor will not refer template JS variables anymore, once all the references are removed the template variables will also be removed.
- Code refactoring wherever possible.
- Covered JS test cases wherever possible.
- Extract SQLEditor.execute and SQLEditor._poll into their own files and add test around them
- Extract SQLEditor backend functions that start executing query to their own files and add tests around it
- Move the Explain SQL from the front-end and now pass the Explain plan parameters as a JSON object in the start query call.
- Extract the compile_template_name into a function that can be used by the different places that try to select the version of the template and the server type
