Create remove_empty_partitions_from_rq.md

content/en/altinity-kb-useful-queries/remove_empty_partitions_from_rq.md

@@ -0,0 +1,22 @@
+---
+title: "Removing tasks in the replication queue related to empty partitions"
+linkTitle: "Removing tasks in the replication queue related to empty partitions"
+weight: 100
+description: >-
+     Removing tasks in the replication queue related to empty partitions
+---
+
+## Removing tasks in the replication queue related to empty partitions
+
+```
+SELECT 'ALTER TABLE ' || database || '.' || table || ' DROP PARTITION ID \''|| partition_id || '\';'  FROM 
+(SELECT DISTINCT database, table, extract(new_part_name, '^[^_]+')  as partition_id FROM clusterAllReplicas('{cluster}', system.replication_queue) ) as rq
+LEFT JOIN 
+(SELECT database, table, partition_id, sum(rows) as rows_count, count() as part_count 
+FROM clusterAllReplicas('{cluster}', system.parts)
+WHERE active GROUP BY database, table, partition_id
+)  as p
+USING (database, table, partition_id)
+WHERE p.rows_count = 0 AND p.part_count = 0
+FORMAT TSVRaw;
+```