mirror of https://github.com/citusdata/citus.git
48 lines
3.6 KiB
Plaintext
48 lines
3.6 KiB
Plaintext
CREATE SCHEMA citus_locks;
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SET search_path TO citus_locks;
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SET citus.next_shard_id TO 1000;
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CREATE TABLE dist_locked_table(id int, data text);
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SELECT create_distributed_table('dist_locked_table', 'id');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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BEGIN;
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-- Alter a distributed table so that we get some locks
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ALTER TABLE dist_locked_table ADD COLUMN new_data_column text;
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-- list the locks on relations for current distributed transaction
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SELECT relation_name, citus_nodename_for_nodeid(nodeid), citus_nodeport_for_nodeid(nodeid), mode, granted
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FROM citus_locks
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WHERE global_pid = citus_backend_gpid() AND locktype = 'relation' AND relation_name LIKE '%dist_locked_table%'
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ORDER BY 1, 2, 3, 4;
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relation_name | citus_nodename_for_nodeid | citus_nodeport_for_nodeid | mode | granted
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---------------------------------------------------------------------
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citus_locks.dist_locked_table | localhost | 57636 | AccessExclusiveLock | t
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citus_locks.dist_locked_table | localhost | 57636 | AccessShareLock | t
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citus_locks.dist_locked_table | localhost | 57637 | AccessExclusiveLock | t
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citus_locks.dist_locked_table | localhost | 57637 | AccessShareLock | t
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citus_locks.dist_locked_table | localhost | 57638 | AccessExclusiveLock | t
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citus_locks.dist_locked_table | localhost | 57638 | AccessShareLock | t
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citus_locks.dist_locked_table_1000 | localhost | 57637 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1000 | localhost | 57637 | AccessShareLock | t
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citus_locks.dist_locked_table_1000 | localhost | 57638 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1000 | localhost | 57638 | AccessShareLock | t
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citus_locks.dist_locked_table_1001 | localhost | 57637 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1001 | localhost | 57637 | AccessShareLock | t
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citus_locks.dist_locked_table_1001 | localhost | 57638 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1001 | localhost | 57638 | AccessShareLock | t
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citus_locks.dist_locked_table_1002 | localhost | 57637 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1002 | localhost | 57637 | AccessShareLock | t
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citus_locks.dist_locked_table_1002 | localhost | 57638 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1002 | localhost | 57638 | AccessShareLock | t
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citus_locks.dist_locked_table_1003 | localhost | 57637 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1003 | localhost | 57637 | AccessShareLock | t
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citus_locks.dist_locked_table_1003 | localhost | 57638 | AccessExclusiveLock | t
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citus_locks.dist_locked_table_1003 | localhost | 57638 | AccessShareLock | t
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(22 rows)
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ROLLBACK;
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DROP SCHEMA citus_locks CASCADE;
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NOTICE: drop cascades to table dist_locked_table
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