Query da eseguire per versioni di PostgreSQL < 9.2:

SELECT bl.pid          AS blocked_pid,
a.usename       AS blocked_user,
kl.pid          AS blocking_pid,
ka.usename      AS blocking_user,
a.current_query AS blocked_statement
FROM  pg_catalog.pg_locks         bl
JOIN pg_catalog.pg_stat_activity a  ON a.procpid = bl.pid
JOIN pg_catalog.pg_locks         kl ON kl.transactionid = bl.transactionid AND kl.pid != bl.pid
JOIN pg_catalog.pg_stat_activity ka ON ka.procpid = kl.pid
WHERE NOT bl.granted;

Query da eseguire per versioni di PostgreSQL > 9.2:

SELECT blocked_locks.pid     AS blocked_pid,
blocked_activity.usename  AS blocked_user,
blocking_locks.pid     AS blocking_pid,
blocking_activity.usename AS blocking_user,
blocked_activity.query    AS blocked_statement,
blocking_activity.query   AS blocking_statement
FROM  pg_catalog.pg_locks         blocked_locks
JOIN pg_catalog.pg_stat_activity blocked_activity  ON blocked_activity.pid = blocked_locks.pid
JOIN pg_catalog.pg_locks         blocking_locks
ON blocking_locks.locktype = blocked_locks.locktype
AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE
AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation
AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page
AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple
AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid
AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid
AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid
AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid
AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
AND blocking_locks.pid != blocked_locks.pid

JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
WHERE NOT blocked_locks.granted;
Categories: Database, Informatica

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