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graph/db+sqldb: only fetch what is needed for graph cache

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Add a ListChannelsWithPoliciesForCachePaginated query that only fetches
the channel/policy fields that the cache requires.
This commit is contained in:
Elle Mouton
2025-07-28 10:04:00 +02:00
parent 3eed2f94c1
commit 43db6683d2
4 changed files with 221 additions and 13 deletions
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45
sqldb/sqlc/queries/graph.sql
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@@ -569,6 +569,51 @@ WHERE c.version = $1 AND c.id > $2
ORDER BY c.id
LIMIT $3;
-- name: ListChannelsWithPoliciesForCachePaginated :many
SELECT
c.id as id,
c.scid as scid,
c.capacity AS capacity,
-- Join node pubkeys
n1.pub_key AS node1_pubkey,
n2.pub_key AS node2_pubkey,
-- Node 1 policy
cp1.timelock AS policy_1_timelock,
cp1.fee_ppm AS policy_1_fee_ppm,
cp1.base_fee_msat AS policy_1_base_fee_msat,
cp1.min_htlc_msat AS policy_1_min_htlc_msat,
cp1.max_htlc_msat AS policy_1_max_htlc_msat,
cp1.disabled AS policy_1_disabled,
cp1.inbound_base_fee_msat AS policy1_inbound_base_fee_msat,
cp1.inbound_fee_rate_milli_msat AS policy1_inbound_fee_rate_milli_msat,
cp1.message_flags AS policy1_message_flags,
cp1.channel_flags AS policy1_channel_flags,
-- Node 2 policy
cp2.timelock AS policy_2_timelock,
cp2.fee_ppm AS policy_2_fee_ppm,
cp2.base_fee_msat AS policy_2_base_fee_msat,
cp2.min_htlc_msat AS policy_2_min_htlc_msat,
cp2.max_htlc_msat AS policy_2_max_htlc_msat,
cp2.disabled AS policy_2_disabled,
cp2.inbound_base_fee_msat AS policy2_inbound_base_fee_msat,
cp2.inbound_fee_rate_milli_msat AS policy2_inbound_fee_rate_milli_msat,
cp2.message_flags AS policy2_message_flags,
cp2.channel_flags AS policy2_channel_flags
FROM graph_channels c
JOIN graph_nodes n1 ON c.node_id_1 = n1.id
JOIN graph_nodes n2 ON c.node_id_2 = n2.id
LEFT JOIN graph_channel_policies cp1
ON cp1.channel_id = c.id AND cp1.node_id = c.node_id_1 AND cp1.version = c.version
LEFT JOIN graph_channel_policies cp2
ON cp2.channel_id = c.id AND cp2.node_id = c.node_id_2 AND cp2.version = c.version
WHERE c.version = $1 AND c.id > $2
ORDER BY c.id
LIMIT $3;
-- name: DeleteChannels :exec
DELETE FROM graph_channels
WHERE id IN (sqlc.slice('ids')/*SLICE:ids*/);