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v2?

hackathon-v1
Onur Tirtir 2023-01-17 15:47:39 +03:00
parent 5c9ca154f9
commit 72401a39b9
1 changed files with 53 additions and 45 deletions
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16
dist_key.sql
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@ -1,4 +1,5 @@
-- CREATE VIEW citus_shard_key_candidates AS -- CREATE VIEW citus_shard_key_candidates AS
WITH initial_suggestions AS (
WITH fkeys AS ( WITH fkeys AS (
select distinct on (freloid, confkey) select distinct on (freloid, confkey)
c.oid as reloid, cf.oid as freloid, c.oid as reloid, cf.oid as freloid,
@ -28,7 +29,7 @@ WITH fkeys AS (
AND c.relkind = 'r' and c.relpersistence = 'p' AND c.relkind = 'r' and c.relpersistence = 'p'
AND cf.relkind = 'r' and cf.relpersistence = 'p' AND cf.relkind = 'r' and cf.relpersistence = 'p'
) )
select n.nspname as schema_name, c.relname as table_name, select c.oid as table_oid,
CASE WHEN pkeys.attname IS NULL THEN 'reference' ELSE 'distributed' END AS citus_table_type, CASE WHEN pkeys.attname IS NULL THEN 'reference' ELSE 'distributed' END AS citus_table_type,
pkeys.attname as distribution_key, pkeys.attname as distribution_key,
CASE CASE
@ -67,6 +68,13 @@ select n.nspname as schema_name, c.relname as table_name,
and d.deptype = 'e' and d.deptype = 'e'
) )
and not exists (select 1 from pg_dist_partition where logicalrelid = c.oid) and not exists (select 1 from pg_dist_partition where logicalrelid = c.oid)
group by 1,2,3,4 group by 1,2,3
order by citus_table_type, n.nspname, c.relname; order by citus_table_type, c.oid
)
SELECT conrelid, confrelid
FROM initial_suggestions t1
JOIN pg_constraint ON (conrelid = t1.table_oid)
WHERE confrelid != 0 AND
-- find illegal conditions
t1.citus_table_type = 'reference' AND
EXISTS (SELECT 1 FROM initial_suggestions t2 WHERE t2.citus_table_type = 'distributed' AND t2.table_oid = confrelid);