QuestDB 9.4.0 ships a new index type for SYMBOL columns that is 13x smaller than the bitmap index, a FILL(PREV(col)) syntax that carries values across columns in SAMPLE BY, and a smarter Web Console that generates materialized view definitions and filters autocompletion by grammar context.
Also in this release: three new window functions, sparkline() / bar() text visualizations, and speed-ups across GROUP BY, hash joins, and top-K queries.
More details at QuestDB 9.4.0: Posting index, cross-column fill, and smarter Web Console | QuestDB