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Proposal: Getting rid of Neighbors in Path Queries #6125

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merged 5 commits into from
Sep 29, 2021
Merged

Proposal: Getting rid of Neighbors in Path Queries #6125

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0a309dc
Some Paths query improvements
neilkakkar Sep 27, 2021
c504949
rm outer ordering
neilkakkar Sep 27, 2021
130604d
fix
neilkakkar Sep 27, 2021
e20f769
resolve merge conflict
neilkakkar Sep 28, 2021
b9bdc95
,,,,
neilkakkar Sep 28, 2021
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8 changes: 3 additions & 5 deletions ee/clickhouse/sql/paths/path.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,14 @@
conversion_time,
event_in_session_index,
concat(toString(event_in_session_index), '_', path) as path_key,
if(event_in_session_index > 1, neighbor(path_key, -1), null) AS last_path_key,
if(event_in_session_index > 1, concat(toString(event_in_session_index-1), '_', prev_path), null) AS last_path_key,
path_dropoff_key
FROM (

SELECT person_id
, joined_path_tuple.1 as path
, joined_path_tuple.2 as conversion_time
, joined_path_tuple.3 as prev_path
, event_in_session_index
, session_index
, arrayPopFront(arrayPushBack(path_basic, '')) as path_basic_0
Expand All @@ -19,7 +20,7 @@
, arrayFilter((x,y)->y, path_basic, mapping) as compact_path
{target_clause}
, arrayDifference(limited_timings) as timings_diff
, arrayZip(limited_path, timings_diff) as limited_path_timings
, arrayZip(limited_path, timings_diff, arrayPopBack(arrayPushFront(limited_path, ''))) as limited_path_timings
, concat(toString(length(limited_path)), '_', limited_path[-1]) as path_dropoff_key /* last path item */
FROM (
SELECT person_id
Expand All @@ -34,14 +35,11 @@
groupArray(path_item) as paths
FROM ({path_event_query})
GROUP BY person_id
ORDER BY person_id
)
/* this array join splits paths for a single personID per session */
ARRAY JOIN session_paths AS path_time_tuple, arrayEnumerate(session_paths) AS session_index
)
ARRAY JOIN limited_path_timings AS joined_path_tuple, arrayEnumerate(limited_path_timings) AS event_in_session_index
{boundary_event_filter}
ORDER BY person_id, session_index, event_in_session_index
)

"""