turso

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Glauber Costa 92751e621b Add DISTINCT support to aggregate operator

Implements COUNT/SUM/AVG(DISTINCT) and SELECT DISTINCT for materialized views.
To do this we have to keep a list of the actual distinct values
(similarly to how we do for min/max). We then update the operator (and
issue deltas) only when there is a state transition (for example, if we
already count the value x = 1, and we see an insert for x = 1, we do
nothing).

SELECT DISTINCT (with no aggregator) is similar. We already have to keep
a list of the values anyway to power the aggregates. So we just issue
new deltas based on the transition, without updating the aggregator.

2025-10-22 16:32:18 -05:00

aggregate_operator.rs

Add DISTINCT support to aggregate operator

2025-10-22 16:32:18 -05:00

compiler.rs

Add DISTINCT support to aggregate operator

2025-10-22 16:32:18 -05:00

cursor.rs

core/mvcc: add btree_cursor under MVCC cursor

2025-10-21 18:22:37 +02:00

dbsp.rs

use 128-bit hashes for the zset_id