[search] Improvement of Solr SQL Editor

/sql

• missing * support
• WHERE col like 'US', not sure if we can do easy search
• no metadata about the full list of columns in the result set (need to look at each col in each row to get the list of all the col, to display in a grid)
• no usual pagination support
• 'select title, max(version), date, stream_size from gettingstarted group by version limit 5' does not limit