Drop unused task_events_v2 duration and attributes_text indexes

Author: matt-aitken

internal-packages/clickhouse/schema/018_drop_unused_task_events_v2_indexes.sql

@@ -0,0 +1,22 @@
+-- +goose Up
+
+-- These indexes are not used in any WHERE clause.
+-- idx_duration: duration is only written/read as a column, never filtered on.
+-- idx_attributes_text: search queries use the task_events_search_v1 table instead.
+ALTER TABLE trigger_dev.task_events_v2
+    DROP INDEX IF EXISTS idx_duration;
+
+ALTER TABLE trigger_dev.task_events_v2
+    DROP INDEX IF EXISTS idx_attributes_text;
+
+-- +goose Down
+
+ALTER TABLE trigger_dev.task_events_v2
+    ADD INDEX IF NOT EXISTS idx_duration duration
+    TYPE minmax
+    GRANULARITY 1;
+
+ALTER TABLE trigger_dev.task_events_v2
+    ADD INDEX IF NOT EXISTS idx_attributes_text attributes_text
+    TYPE tokenbf_v1(32768, 3, 0)
+    GRANULARITY 8;