[Epic] SQL Playground

[mxsph]

Tracking Issue for the SQL Playground.

Frontend Tasks

• Hide SQL-Playground for Normal Users #857
• add result table for SQL Playground #780
• add grid layout for SQL Playground page #779
• add navbar item with empty page #778
• extend SQL input by optional number of tabs #781
• add error message component to result container #782
• add DB Schema Component #921
• add DB (controll) component #922
• [SQL Playground] attach api to frontend components #955
• [SQL Playground] submission of a task in sql playground #990
• [SQL Playground] position the page actions at the bottom of the container. (see [SQL Playground] attach api to frontend components #982 (review))
• [SQL Playground] Save Queries in the Databases to keep them persistent after a reload
• [SQL-Playground] improvement and enhancement of the db panel #1003
• [SQL-Playground] Improve Input #1004

API Tasks

• Implementation of the SQL Playground API #919
• [SQL Playground] Error while storing larger Database Informations #957
• [SQL Playground] Error while storing larger SQL statements #960
• [SQL Playground] Error while executing SQL statements with special chars  #961
• [SQL Playground] The database information is deleted if the query returns an error #964
• [SQL Playground] Error while deleting a database #969
• [SQL Playground] After DB Creation table/view/trigger/routines-Routes return an 404 error #970
• [SQL Playground] Improve the table/view/trigger/routines-Routes Data types #971
• Implement reset /.../{dbId}/reset route
• Use the time returned from the Checker to prevent storage of old Database Information
• Get the DB Version from the aktuell database
• [SQL Playground] Allow to share a Playground DB with multiple users #1208

Checker Tasks

• Extension of the SQL Checker to cover persistent databases #944
• Return the time when the DB informations where gethered