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improve citus_shards

tenant-schema-isolation-complete-view
Onur Tirtir 2023-10-03 10:02:25 +03:00
parent cc587101ed
commit d1a1ad0147
2 changed files with 24 additions and 24 deletions
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22
src/backend/distributed/sql/udfs/citus_shards/12.2-1.sql generated
View File

@ -15,23 +15,23 @@ SELECT
CASE
WHEN NOT pg_dist_shard.needsseparatenode THEN false
ELSE
-- has_separate_node = true if the node doesn't have any other shards except the ones that are colocated with this shard
-- has_separate_node = true if the node doesn't have any other shard
-- placements except the ones that belong to the same shard group.
NOT EXISTS (
-- get all the distributed table shards that are placed on the same node as this shard
SELECT pds1.shardid
SELECT 1
FROM pg_dist_shard pds1
JOIN pg_dist_placement pdp1 USING (shardid)
JOIN pg_dist_partition pdp2 USING (logicalrelid)
WHERE pdp1.groupid = pg_dist_placement.groupid AND
(pdp2.partkey IS NOT NULL OR (pdp2.repmodel != 't' AND pdp2.colocationid != 0))
EXCEPT
-- get all the shards that are colocated with this shard
SELECT pds1.shardid
FROM pg_dist_shard pds1
JOIN pg_dist_partition pdp1 USING (logicalrelid)
WHERE pdp1.colocationid = pg_dist_partition.colocationid AND
WHERE
-- get the distributed table placements that are placed on the same node as this placement
pdp1.groupid = pg_dist_placement.groupid AND
(pdp2.partkey IS NOT NULL OR (pdp2.repmodel != 't' AND pdp2.colocationid != 0)) AND
-- filter out all the placements that belong to the same shard group
NOT (
pdp2.colocationid = pg_dist_partition.colocationid AND
((pds1.shardminvalue IS NULL AND pg_dist_shard.shardminvalue IS NULL) OR (pds1.shardminvalue = pg_dist_shard.shardminvalue))
)
)
END AS has_separate_node
FROM
pg_dist_shard

22
src/backend/distributed/sql/udfs/citus_shards/latest.sql
View File

@ -15,23 +15,23 @@ SELECT
CASE
WHEN NOT pg_dist_shard.needsseparatenode THEN false
ELSE
-- has_separate_node = true if the node doesn't have any other shards except the ones that are colocated with this shard
-- has_separate_node = true if the node doesn't have any other shard
-- placements except the ones that belong to the same shard group.
NOT EXISTS (
-- get all the distributed table shards that are placed on the same node as this shard
SELECT pds1.shardid
SELECT 1
FROM pg_dist_shard pds1
JOIN pg_dist_placement pdp1 USING (shardid)
JOIN pg_dist_partition pdp2 USING (logicalrelid)
WHERE pdp1.groupid = pg_dist_placement.groupid AND
(pdp2.partkey IS NOT NULL OR (pdp2.repmodel != 't' AND pdp2.colocationid != 0))
EXCEPT
-- get all the shards that are colocated with this shard
SELECT pds1.shardid
FROM pg_dist_shard pds1
JOIN pg_dist_partition pdp1 USING (logicalrelid)
WHERE pdp1.colocationid = pg_dist_partition.colocationid AND
WHERE
-- get the distributed table placements that are placed on the same node as this placement
pdp1.groupid = pg_dist_placement.groupid AND
(pdp2.partkey IS NOT NULL OR (pdp2.repmodel != 't' AND pdp2.colocationid != 0)) AND
-- filter out all the placements that belong to the same shard group
NOT (
pdp2.colocationid = pg_dist_partition.colocationid AND
((pds1.shardminvalue IS NULL AND pg_dist_shard.shardminvalue IS NULL) OR (pds1.shardminvalue = pg_dist_shard.shardminvalue))
)
)
END AS has_separate_node
FROM
pg_dist_shard