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refactor: updated session_times view
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Tacio Medeiros committed Sep 16, 2024
1 parent 7b289d6 commit b6579e7
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84 changes: 84 additions & 0 deletions fmo_server/schema/v5.sql
Original file line number Diff line number Diff line change
@@ -0,0 +1,84 @@
-- Create the update session_times view
BEGIN;
INSERT INTO schema_version (version)
VALUES (5);

DROP MATERIALIZED VIEW IF EXISTS session_times;

CREATE MATERIALIZED VIEW session_times AS
WITH proposer_votes AS (
SELECT
federation_id,
session_index,
proposer,
MAX(height_vote) AS proposer_height
FROM block_height_votes
GROUP BY federation_id, session_index, proposer
),

session_proposer_heights AS (
SELECT
federation_id,
session_index,
proposer_height,
COUNT(*) AS vote_cnt
FROM proposer_votes
GROUP BY federation_id, session_index, proposer_height
),

session_heights AS (
SELECT
federation_id,
session_index,
proposer_height AS block_height,
vote_cnt,
ROW_NUMBER()
OVER (
PARTITION BY federation_id, session_index ORDER BY vote_cnt DESC
)
AS rn
FROM session_proposer_heights
),

session_times AS (
SELECT
sh.federation_id,
sh.session_index,
sh.block_height,
bt.timestamp,
sh.vote_cnt
FROM session_heights AS sh
LEFT JOIN
block_times AS bt
ON sh.block_height = bt.block_height
WHERE sh.rn = 1
)

SELECT
s.federation_id,
s.session_index,
MAX(st.timestamp)
OVER (
PARTITION BY s.federation_id
ORDER BY
s.session_index
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
)
AS estimated_session_timestamp
FROM sessions AS s
LEFT JOIN
session_times AS st
ON s.federation_id = st.federation_id AND s.session_index = st.session_index
ORDER BY s.federation_id, s.session_index;

CREATE INDEX session_times_federation_id_idx ON session_times (federation_id);

CREATE UNIQUE INDEX session_times_federation_id_session_index_idx ON session_times (
federation_id, session_index
);

CREATE INDEX session_times_federation_id_estimated_session_timestamp_idx ON session_times (
federation_id, estimated_session_timestamp
);

COMMIT;
4 changes: 4 additions & 0 deletions fmo_server/src/federation/observer.rs
Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,10 @@ impl FederationObserver {
4,
include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/schema/v4.sql")),
),
(
5,
include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/schema/v5.sql")),
),
];

for (version, migration) in migration_map.iter() {
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